clear out js files

13 files changed, 0 insertions, 1897 deletions

diff --git a/src/simulation/actions.js b/src/simulation/actions.js
deleted file mode 100644
index ad08572..0000000
--- a/src/simulation/actions.js
+++ /dev/null
@@ -1,260 +0,0 @@
-'use strict';
-
-const threshold = 0.5;
-
-
-const move_forward = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (agent.flags.frozen === true) { return []; }
-    if (head[0] > threshold) {
-      console.log('move forward');
-      console.log(agent.id, agent.x, agent.y);
-      const dx = { n: 0, e: 1, s: 0, w: -1 }[agent.flags.orientation];
-      const dy = { n: -1, e: 0, s: 1, w: 0 }[agent.flags.orientation];
-      return [{
-        agent_changes: [{
-          agent_id: agent.id,
-          x: agent.x + dx,
-          y: agent.y + dy,
-        }],
-      }];
-    } else {
-      return [];
-    }
-  },
-};
-
-
-const move_backward = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (agent.flags.frozen === true) { return []; }
-    if (head[0] > threshold) {
-      console.log('move backward');
-      const dx = { n: 0, e: 1, s: 0, w: -1 }[agent.flags.orientation];
-      const dy = { n: -1, e: 0, s: 1, w: 0 }[agent.flags.orientation];
-      return [{
-        agent_changes: [{
-          agent_id: agent.id,
-          x: agent.x - dx,
-          y: agent.y - dy,
-        }],
-      }];
-    } else {
-      return [];
-    }
-  },
-};
-
-
-const turn_left = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (agent.flags.frozen === true) { return []; }
-    if (head[0] > threshold) {
-      console.log('turn left');
-      const orientation = { n: 'w', e: 'n', s: 'e', w: 's' }[agent.flags.orientation];
-      return [{
-        agent_changes: [{
-          agent_id: agent.id,
-          flags: { orientation },
-        }],
-      }];
-    } else {
-      return [];
-    }
-  },
-};
-
-
-const turn_right = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (agent.flags.frozen === true) { return []; }
-    if (head[0] > threshold) {
-      console.log('turn right');
-      const orientation = { n: 'e', e: 's', s: 'w', w: 'n' }[agent.flags.orientation];
-      return [{
-        agent_changes: [{
-          agent_id: agent.id,
-          flags: { orientation },
-        }],
-      }];
-    } else {
-      return [];
-    }
-  },
-};
-
-
-const place = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (head[0] < threshold) { return []; }
-    else {
-      const dx = { n: 0, e: 1, s: 0, w: -1 }[agent.flags.orientation];
-      const dy = { n: -1, e: 0, s: 1, w: 0 }[agent.flags.orientation];
-      return [
-        { lattice_changes: [{
-          x: agent.x + dx, y: agent.y + dy,
-          from: 'empty', to: 'mutable',
-          flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] },
-        }]}
-      ];
-    }
-  },
-};
-
-
-const trigger = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (head[0] < threshold) { return []; }
-    else {
-      const dx = { n: 0, e: 1, s: 0, w: -1 }[agent.flags.orientation];
-      const dy = { n: -1, e: 0, s: 1, w: 0 }[agent.flags.orientation];
-      return [
-        { lattice_changes: [{
-          x: agent.x + dx, y: agent.y + dy,
-          from: 'mutable', to: 'active',
-          flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] },
-        }]}
-      ];
-    }
-  },
-};
-
-
-const pretend_frozen = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (head[0] < threshold) { return [{
-      agent_changes: [{
-        agent_id: agent.id,
-        flags: { pretend_frozen: false },
-      }],
-    }]; }
-    else {
-      return [{
-        agent_changes: [{
-          agent_id: agent.id,
-          flags: { pretend_frozen: true },
-        }]
-      }];
-    }
-  },
-};
-
-
-const unfreeze = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (head[0] < threshold) { return []; }
-    else {
-      const dx = { n: 0, e: 1, s: 0, w: -1 }[agent.flags.orientation];
-      const dy = { n: -1, e: 0, s: 1, w: 0 }[agent.flags.orientation];
-      const target = world.agents.filter(
-        a => a.x === agent.x+dx && a.y === agent.y+dy
-      )[0];
-      if (target === undefined) { return []; }
-      return [
-        { agent_changes: [{
-          agent_id: target.id,
-          flags: { frozen: false, emit: [0, 1, 0, 0, 0, 0, 0, 0] },
-        }]}
-      ];
-    }
-  },
-};
-
-
-const take_flag = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (head[0] < threshold) { return []; }
-    else {
-      const dx = { n: 0, e: 1, s: 0, w: -1 }[agent.flags.orientation];
-      const dy = { n: -1, e: 0, s: 1, w: 0 }[agent.flags.orientation];
-      const target = world.agents.filter(
-        a => a.x === agent.x+dx && a.y === agent.y+dy
-      )[0];
-      if (target === undefined || !target.flags.flag) {
-        return [
-          { 
-            lattice_changes: [{
-              x: agent.x + dx, y: agent.y + dy,
-              from: 'flag', to: 'empty',
-              flags: { emit: [ 0, 0, 1, 0, 0, 0, 0, 0 ] },
-            }],
-            agent_changes: [{
-              agent_id: agent.id,
-              flags: { flag: true },
-            }],
-          }
-        ];
-      } else {
-        return [{
-          agent_changes: [
-            {
-              agent_id: target.id,
-              flags: { flag: false },
-            },
-            {
-              agent_id: agent.id,
-              flags: { flag: true },
-            },
-          ],
-        }];
-      }
-    }
-  },
-};
-
-
-const drop_flag = {
-  size: 1,
-  propose: (world, agent, head) => {
-    if (head[0] < threshold) { return []; }
-    else if (!agent.flags.flag) { return []; }
-    else {
-      const dx = { n: 0, e: 1, s: 0, w: -1 }[agent.flags.orientation];
-      const dy = { n: -1, e: 0, s: 1, w: 0 }[agent.flags.orientation];
-      return [
-        { 
-          lattice_changes: [{
-            x: agent.x + dx, y: agent.y + dy,
-            from: 'empty', to: 'flag',
-            flags: { emit: [ 0, 0, -1, 0, 0, 0, 0, 0 ] },
-          }],
-          agent_changes: [{
-            agent_id: agent.id,
-            flags: { flag: false },
-          }],
-        }
-      ];
-    }
-  },
-};
-
-
-const speak = {
-  size: 8,
-  propose: (world, agent, head) => {
-    return [
-      {
-        agent_changes: [{
-          agent_id: agent.id,
-          flags: { emit: head },
-        }],
-      },
-    ];
-  },
-};
-
-
-export const actions = [
-  move_forward, /*move_backward, */turn_left, turn_right, 
-  place, trigger, pretend_frozen, unfreeze, take_flag, drop_flag,
-  speak,
-];
diff --git a/src/simulation/actions.test.js b/src/simulation/actions.test.js
deleted file mode 100644
index e8406bc..0000000
--- a/src/simulation/actions.test.js
+++ /dev/null
@@ -1,294 +0,0 @@
-'use strict';
-
-import { actions } from './actions.js';
-
-
-const [
-  move_forward, move_backward, 
-  turn_left, turn_right,
-  place, trigger,
-  pretend_frozen, unfreeze,
-  take_flag,
-  ...rest
-] = actions;
-
-
-test("move forward", () => {
-  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
-  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
-  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
-  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };
-
-  expect(move_forward.propose(null, n, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, x: 0, y: -1 }] },
-  ]);
-  expect(move_forward.propose(null, s, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, x: 0, y: 1 }] },
-  ]);
-  expect(move_forward.propose(null, e, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, x: 1, y: 0 }] },
-  ]);
-  expect(move_forward.propose(null, w, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, x: -1, y: 0 }] },
-  ]);
-
-  expect(move_forward.propose(null, n, [0])).toEqual([]);
-  expect(move_forward.propose(null, s, [-1])).toEqual([]);
-  expect(move_forward.propose(null, e, [0])).toEqual([]);
-  expect(move_forward.propose(null, w, [-1])).toEqual([]);
-});
-
-
-test("move backward", () => {
-  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
-  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
-  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
-  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };
-
-  expect(move_backward.propose(null, n, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, x: 0, y: 1 }] },
-  ]);
-  expect(move_backward.propose(null, s, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, x: 0, y: -1 }] },
-  ]);
-  expect(move_backward.propose(null, e, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, x: -1, y: 0 }] },
-  ]);
-  expect(move_backward.propose(null, w, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, x: 1, y: 0 }] },
-  ]);
-
-  expect(move_backward.propose(null, n, [0])).toEqual([]);
-  expect(move_backward.propose(null, s, [-1])).toEqual([]);
-  expect(move_backward.propose(null, e, [0])).toEqual([]);
-  expect(move_backward.propose(null, w, [-1])).toEqual([]);
-});
-
-
-test("turn_left", () => {
-  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
-  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
-  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
-  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };
-
-  expect(turn_left.propose(null, n, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, flags: { orientation: 'w' } }] },
-  ]);
-  expect(turn_left.propose(null, s, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, flags: { orientation: 'e' } }] },
-  ]);
-  expect(turn_left.propose(null, e, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, flags: { orientation: 'n' } }] },
-  ]);
-  expect(turn_left.propose(null, w, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, flags: { orientation: 's' } }] },
-  ]);
-
-  expect(turn_left.propose(null, n, [0])).toEqual([]);
-  expect(turn_left.propose(null, s, [-1])).toEqual([]);
-  expect(turn_left.propose(null, e, [0])).toEqual([]);
-  expect(turn_left.propose(null, w, [-1])).toEqual([]);
-});
-
-
-test("turn_right", () => {
-  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
-  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
-  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
-  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };
-
-  expect(turn_right.propose(null, n, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, flags: { orientation: 'e' } }] },
-  ]);
-  expect(turn_right.propose(null, s, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, flags: { orientation: 'w' } }] },
-  ]);
-  expect(turn_right.propose(null, e, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, flags: { orientation: 's' } }] },
-  ]);
-  expect(turn_right.propose(null, w, [1])).toEqual([
-    { agent_changes: [{ agent_id: 0, flags: { orientation: 'n' } }] },
-  ]);
-
-  expect(turn_right.propose(null, n, [0])).toEqual([]);
-  expect(turn_right.propose(null, s, [-1])).toEqual([]);
-  expect(turn_right.propose(null, e, [0])).toEqual([]);
-  expect(turn_right.propose(null, w, [-1])).toEqual([]);
-});
-
-
-test("place", () => {
-  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
-  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
-  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
-  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };
-
-  expect(place.propose(null, n, [1])).toEqual([
-    { lattice_changes: [
-      { 
-        x: 0, y: -1, from: 'empty', to: 'mutable', 
-        flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] } 
-      }
-    ]}
-  ]);
-  expect(place.propose(null, s, [1])).toEqual([
-    { lattice_changes: [
-      { 
-        x: 0, y: 1, from: 'empty', to: 'mutable', 
-        flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] } 
-      }
-    ]}
-  ]);
-  expect(place.propose(null, e, [1])).toEqual([
-    { lattice_changes: [
-      { 
-        x: 1, y: 0, from: 'empty', to: 'mutable', 
-        flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] } 
-      }
-    ]}
-  ]);
-  expect(place.propose(null, w, [1])).toEqual([
-    { lattice_changes: [
-      { 
-        x: -1, y: 0, from: 'empty', to: 'mutable', 
-        flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] } 
-      }
-    ]}
-  ]);
-
-  expect(place.propose(null, n, [0])).toEqual([]);
-  expect(place.propose(null, s, [-1])).toEqual([]);
-  expect(place.propose(null, e, [0])).toEqual([]);
-  expect(place.propose(null, w, [-1])).toEqual([]);
-});
-
-
-test("trigger", () => {
-  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
-  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
-  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
-  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };
-
-  expect(trigger.propose(null, n, [1])).toEqual([
-    { lattice_changes: [{
-      x: 0, y: -1, from: 'mutable', to: 'active',
-      flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] },
-    }]},
-  ]);
-  expect(trigger.propose(null, s, [1])).toEqual([
-    { lattice_changes: [{
-      x: 0, y: 1, from: 'mutable', to: 'active',
-      flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] },
-    }]},
-  ]);
-  expect(trigger.propose(null, e, [1])).toEqual([
-    { lattice_changes: [{
-      x: 1, y: 0, from: 'mutable', to: 'active',
-      flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] },
-    }]},
-  ]);
-  expect(trigger.propose(null, w, [1])).toEqual([
-    { lattice_changes: [{
-      x: -1, y: 0, from: 'mutable', to: 'active',
-      flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] },
-    }]},
-  ]);
-
-  expect(trigger.propose(null, n, [0])).toEqual([]);
-  expect(trigger.propose(null, s, [-1])).toEqual([]);
-  expect(trigger.propose(null, e, [0])).toEqual([]);
-  expect(trigger.propose(null, w, [-1])).toEqual([]);
- });
-
-
-test("pretend frozen", () => {
-  const agent = { id: 2, x: 0, y: 0, flags: { orientation: 'n' } };
-
-  expect(pretend_frozen.propose(null, agent, [1])).toEqual([{
-    agent_changes: [{
-      agent_id: 2,
-      flags: { pretend_frozen: true },
-    }]
-  }]);
-
-  expect(pretend_frozen.propose(null, agent, [0])).toEqual([{
-    agent_changes: [{
-      agent_id: 2,
-      flags: { pretend_frozen: false },
-    }]
-  }]);
-});
-
-
-test("unfreeze", () => {
-  const agent1 = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
-  const agent2 = { id: 1, x: 0,  y: -1 };
-  const agent3 = { id: 10, x: -1, y: 0 };
-  const agents = [ agent1, agent2, agent3 ];
-
-  expect(unfreeze.propose({agents}, agent1, [1])).toEqual([{
-    agent_changes: [{
-      agent_id: 1,
-      flags: { frozen: false, emit: [ 0, 1, 0, 0, 0, 0, 0, 0 ] },
-    }]
-  }]);
-
-  agent1.flags.orientation = 'w';
-
-  expect(unfreeze.propose({agents}, agent1, [1])).toEqual([{
-    agent_changes: [{
-      agent_id: 10,
-      flags: { frozen: false, emit: [ 0, 1, 0, 0, 0, 0, 0, 0 ] },
-    }]
-  }]);
-
-  agent1.flags.orientation = 's';
-  expect(unfreeze.propose({agents}, agent1, [1])).toEqual([]);
-
-  expect(unfreeze.propose({agents}, agent1, [0])).toEqual([]);
-});
-
-
-test("take flag", () => {
-  const agent = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
-  const other1 = { id: 1, x: 0, y: -1, flags: { flag: true } };
-  const other2 = { id: 2, x: 0, y: 1, flags: { flag: false } };
-
-  const world = { agents: [ agent, other1, other2 ] };
-
-  expect(take_flag.propose(world, agent, [1])).toEqual([
-    { agent_changes: [
-      { agent_id: 1, flags: { flag: false } },
-      { agent_id: 0, flags: { flag: true  } },
-    ]},
-  ]);
-
-  agent.flags.orientation = 's';
-  expect(take_flag.propose(world, agent, [1])).toEqual([
-    { 
-      lattice_changes: [
-        { 
-          x: 0, y: 1, from: 'flag', to: 'empty',
-          flags: { emit: [ 0, 0, 1, 0, 0, 0, 0, 0 ] },
-        },
-      ],
-      agent_changes: [
-        { agent_id: 0, flags: { flag: true  } },
-      ]
-    },
-  ]);
-
-  expect(take_flag.propose(world, agent, [0])).toEqual([]);
-});
-
-
-test("frozen agents cannot move", () => {
-  const agent = { id: 0, x: 0, y: 0, flags: { orientation: 'n', frozen: true } };
-
-  const world = { agents: [agent] };
-
-  expect(move_forward.propose(world, agent, [1])).toEqual([]);
-  expect(move_backward.propose(world, agent, [1])).toEqual([]);
-  expect(turn_left.propose(world, agent, [1])).toEqual([]);
-  expect(turn_right.propose(world, agent, [1])).toEqual([]);
-});
diff --git a/src/simulation/game.js b/src/simulation/game.js
deleted file mode 100644
index 978289d..0000000
--- a/src/simulation/game.js
+++ /dev/null
@@ -1,255 +0,0 @@
-'use strict';
-
-
-import { random_choice, apply, shuffle } from '../util.js';
-import { mut_genome_insert, parse_genome } from '../genome/genome.js';
-import { world_update } from '../world/world.js';
-import { senses } from './senses.js';
-import { actions } from './actions.js';
-import { lattice_rules } from './lattice_rules.js';
-import { validity } from './validity.js';
-import { postprocess } from './postprocess.js';
-
-
-function is_wall(size, x, y) {
-  return (
-    x === 0 || x === size-1 ||
-    y === 0 || y === size-1
-  );
-}
-function is_corner(size, x, y) {
-  const subsize = Math.floor(size/3);
-  return (
-    (x < subsize || x >= 2*subsize) &&
-    (y < subsize || y >= 2*subsize)
-  );
-}
-export function get_team(size, x, y) {
-  const subsize = Math.floor(size/3);
-  if (y < subsize) {
-    return 0;
-  } else if (x >= 2*subsize) {
-    return 1;
-  } else if (y >= 2*subsize) {
-    return 2;
-  } else if (x < subsize) {
-    return 3;
-  } else {
-    return undefined;
-  }
-}
-
-export function setup_board(size) {
-  const lattice = [...Array(size)]
-    .map(() => [...Array(size)])
-    .map((row, y) => row.map((_, x) => {
-      if (is_wall(size, x, y)) {
-        return { type: 'immutable', flags: {} };
-      } else if (is_corner(size, x, y)) {
-        return { type: 'immutable', flags: {} };
-      } else {
-        const team = get_team(size, x, y);
-        if (Math.random() > 0.95 && get_team(size, x, y) === undefined) {
-          return { type: 'flag', flags: { team } };
-        } else {
-          return { type: 'empty', flags: { team } };
-        }
-      }
-    }));
-  return lattice;
-}
-
-
-export function create_world(size, teams) {
-  const lattice = setup_board(size);
-
-  const agents = teams.reduce(
-    (agents, team, team_num) => {
-      const team_cells = lattice.map((row, y) => row.map((cell, x) => [x, y, cell])).flat()
-        // only check cells with the right team
-        .filter(([x, y, cell]) => cell.type === 'empty' && cell.flags.team === team_num)
-      return agents.concat(team.reduce(
-        (acc, agent) => {
-          const available_cells = team_cells.filter(([x, y, cell]) => acc.reduce(
-            (occupied, a) => occupied && ((a.x !== x) || (a.y !== y)),
-            true
-          ))
-          const [x, y, ..._] = random_choice(available_cells);
-          const orientation = random_choice([ 'n', 'e', 's', 'w' ]);
-          return [...acc, {...agent, x, y, flags: { ...agent.flags, team: team_num, orientation } }];
-        },
-        []
-      ));
-    },
-    []
-  ).flat();
-
-  return { lattice, lattice_rules, agents, actions, senses, validity };
-};
-
-
-// team structure:
-// {
-//   agents
-//   genome
-//   score
-//   games
-// }
-
-const N_INPUT = senses.reduce((acc, sense) => acc + sense.size, 0);
-const N_OUTPUT = actions.reduce((acc, action) => acc + action.size, 0);
-const MAX_MUTATIONS = 15;
-
-
-let agent_id = 0;
-
-export function create_agent(genome, n_internal) {
-  return {
-    id: agent_id++, // !!!! side effect !!!!
-    net: parse_genome(genome),
-  state: [...Array(n_internal)].map(_ => (2*Math.random()) - 1),
-  }
-}
-
-
-
-export function create_team(size, genome_size, n_internal) {
-  const genome = apply(
-    s => mut_genome_insert(s, 4),
-    genome_size,
-    {n_input: N_INPUT, n_internal, n_output: N_OUTPUT, genes: []},
-  );
-  console.log(N_INPUT, N_OUTPUT, genome);
-
-  const agents = [...Array(size)].map(_ => create_agent(genome, n_internal));
-  return { agents, genome, score: 0, games: 0 };
-}
-
-
-export function child_team(team, keep=Math.floor(team.size/2)) {
-  const n_internal = get_size(team.genome) - N_INPUT - N_OUTPUT;
-  const genome = apply(
-    s => mutate_genome(s, 4),
-    Math.floor(MAX_MUTATIONS * Math.random()),
-    [N_INPUT, n_internal, N_OUTPUT, team.genome]
-  );
-
-  const old_agents = [...Array(team.agents.length - keep)].reduce(
-    (acc, _) => {
-      const idx = Math.floor(Math.random() * acc.length);
-      acc.splice(idx, 1);
-      return acc;
-    },
-  );
-  const new_agents = [...Array(team.agents.length - keep)].map(_ => create_agent(genome, n_internal));
-  const agents = [old_agents, new_agents].flat();
-
-  return { agents, genome, score: 0, games: 0 };
-}
-
-
-// game structure:
-// {
-//   world: world
-//   team_indices: number[]
-//   time: number
-// }
-
-
-export function create_game(size, teams, team_indices) {
-  const world = create_world(size, team_indices.map(i => teams[i].agents));
-  return { world, team_indices, time: 0 };
-}
-
-
-export function step_game(game) {
-  return {
-    ...game,
-    world: world_update(game.world, postprocess),
-    time: game.time + 1,
-  };
-}
-
-
-function score(lattice, team_num) {
-  const size = lattice.length;
-
-  // count number of flags in the team's area
-  return lattice
-    .map((row, y) => row.map((cell, x) => [x, y, cell]))
-    .flat()
-    .filter(([x, y, cell]) => get_team(size, x, y) === team_num && cell.type === 'flag')
-    .length;
-}
-
-export function finish_game(teams, game) {
-  const scores = [0, 1, 2, 3].map(t => score(game.world.lattice, t));
-  return game.team_indices.reduce(
-    (acc, idx, i) => {
-      const team = teams[idx];
-      acc.splice(idx, 1, {...team, score: team.score + scores[i], games: team.games+1});
-      return acc;
-    },
-    teams,
-  );
-}
-
-
-
-// epoch structure
-// {
-//   game
-//   time
-//   teams
-// }
-
-function random_indices(teams) {
-  return [...Array(teams.length - 4)].reduce(
-    (acc) => {
-      const idx = Math.floor(Math.random() * acc.length);
-      acc.splice(idx, 1);
-      return acc;
-    },
-    [...teams.keys()]
-  );
-}
-
-let epoch_num = 0;
-export function create_epoch(size, teams) {
-  return {
-    game: create_game(size, teams, random_indices(teams)),
-    time: 0,
-    epoch: epoch_num++, // !!!! side effects !!!!
-    size,
-    teams,
-  }
-}
-
-
-const GAME_STEPS = 10000
-const EPOCH_STEPS = 200
-
-export function update_epoch(epoch) {
-  if (epoch.game.time < GAME_STEPS) {
-    return { ...epoch, game: step_game(epoch.game) };
-  } else if (epoch.time < EPOCH_STEPS) {
-    return { 
-      ...epoch, 
-      teams: finish_game(epoch.teams, epoch.game),
-      game: create_game(size, epoch.teams, random_indices(epoch.teams)), 
-      time: epoch.time+1 
-    };
-  } else {
-    // epoch complete!!
-    const source_teams = epoch.teams
-      .map(team => {
-        const normalized_score = team.score/team.games;
-        const count = Math.ceil(16*normalized_score);
-        return [...Array(count > 0 ? count : 1)].map(x => team)
-      })
-      .flat();
-    const new_teams = [...Array(epoch.teams.length)]
-      .reduce((acc) => child_team(random_choice(source_teams)), []);
-    return create_epoch(epoch.size, new_teams);
-  }
-}
diff --git a/src/simulation/game.test.js b/src/simulation/game.test.js
deleted file mode 100644
index 219dce6..0000000
--- a/src/simulation/game.test.js
+++ /dev/null
@@ -1,59 +0,0 @@
-'use strict';
-
-import { apply } from '../util.js';
-import { setup_board, create_world } from './game.js';
-
-
-test("set up boards correctly", () => {
-  const _ = { type: 'empty', flags: {} };
-  const a = { type: 'empty', flags: { team: 0 } };
-  const b = { type: 'empty', flags: { team: 1 } };
-  const c = { type: 'empty', flags: { team: 2 } };
-  const d = { type: 'empty', flags: { team: 3 } };
-  const W = { type: 'immutable', flags: {} };
-
-  expect(setup_board(6)).toEqual([
-    [ W, W, W, W, W, W, ],
-    [ W, W, a, a, W, W, ],
-    [ W, d, _, _, b, W, ],
-    [ W, d, _, _, b, W, ],
-    [ W, W, c, c, W, W, ],
-    [ W, W, W, W, W, W, ],
-  ]);
-  expect(setup_board(9)).toEqual([
-    [ W, W, W, W, W, W, W, W, W, ],
-    [ W, W, W, a, a, a, W, W, W, ],
-    [ W, W, W, a, a, a, W, W, W, ],
-    [ W, d, d, _, _, _, b, b, W, ],
-    [ W, d, d, _, _, _, b, b, W, ],
-    [ W, d, d, _, _, _, b, b, W, ],
-    [ W, W, W, c, c, c, W, W, W, ],
-    [ W, W, W, c, c, c, W, W, W, ],
-    [ W, W, W, W, W, W, W, W, W, ],
-  ]);
-});
-
-
-test("creating a world works correctly", () => {
-  const id = 0;
-  const agent = (id) => ({ id, net: `${id}`, state: `s${id}` });
-  const team1 = [agent(0), agent(1)];
-  const team2 = [agent(2), agent(3)];
-  const team3 = [agent(4), agent(5)];
-  const team4 = [agent(6), agent(7)];
-
-  const world = create_world(6, [team1, team2, team3, team4]);
-  const agent_cell = (agent) => {
-    const { x, y } = agent;
-    return world.lattice[y][x];
-  };
-
-  expect(agent_cell(world.agents[0])).toEqual({ type: 'empty', flags: { team: 0 } });
-  expect(agent_cell(world.agents[1])).toEqual({ type: 'empty', flags: { team: 0 } });
-  expect(agent_cell(world.agents[2])).toEqual({ type: 'empty', flags: { team: 1 } });
-  expect(agent_cell(world.agents[3])).toEqual({ type: 'empty', flags: { team: 1 } });
-  expect(agent_cell(world.agents[4])).toEqual({ type: 'empty', flags: { team: 2 } });
-  expect(agent_cell(world.agents[5])).toEqual({ type: 'empty', flags: { team: 2 } });
-  expect(agent_cell(world.agents[6])).toEqual({ type: 'empty', flags: { team: 3 } });
-  expect(agent_cell(world.agents[7])).toEqual({ type: 'empty', flags: { team: 3 } });
-});
diff --git a/src/simulation/lattice_rules.js b/src/simulation/lattice_rules.js
deleted file mode 100644
index cc2fc5b..0000000
--- a/src/simulation/lattice_rules.js
+++ /dev/null
@@ -1,77 +0,0 @@
-import { pairs } from '../util.js';
-import { get_team } from './game.js';
-
-function mod(k, n) {
-  return ((k % n) + n) % n;
-}
-
-function pos_wrap(lattice, x, y) {
-  const height = lattice.length;
-  const width = lattice[0].length;
-  return [mod(x, width), mod(y, height)];
-}
-
-
-function neighbors(lattice, x, y) {
-  const offsets = [-1, 0, 1];
-  const positions = pairs(offsets, offsets)
-    .filter(([dx, dy]) => dx !== 0 || dy !== 0)
-    .map(([dx, dy]) => pos_wrap(lattice, x+dx, y+dy));
-  const neighbors = positions
-    .map(([x, y]) => [x, y, lattice[y][x]]);
-  return neighbors;
-}
-
-
-export const lattice_rules = {
-
-  empty: (lattice, x, y) => {
-    const num_active_neighbors = neighbors(lattice, x, y)
-      .map(([x, y, cell]) => cell.type)
-      .filter(type => type === 'mutable' || type === 'active')
-      .length;
-    if (num_active_neighbors === 3) {
-      return { world_updates: [{ 
-        x, y, from: 'empty', to: 'active',
-        flags: { emit: [0, 0, 0, 0, 0, 0, 0, 1] },
-      }]};
-    } else {
-      return { world_updates: [{
-        x, y, flags: { team: get_team(lattice.length, x, y) },
-      }]};
-    }
-  },
-
-  active: (lattice, x, y) => {
-    const num_active_neighbors = neighbors(lattice, x, y)
-      .map(([x, y, cell]) => cell.type)
-      .filter(type => type === 'mutable' || type === 'active')
-      .length;
-    const die = { world_updates: [{ 
-      x, y, from: 'active', to: 'empty', 
-      flags: { emit: [0, 0, 0, 0, 0, 0, 0, -1] }, 
-    }]};
-    if (num_active_neighbors < 2) {
-      return die;
-    } else if (num_active_neighbors > 3) {
-      return die;
-    }
-  },
-
-  mutable: (lattice, x, y) => {
-    const num_active_neighbors = neighbors(lattice, x, y)
-      .map(([x, y, cell]) => cell.type)
-      .filter(type => type === 'active')
-      .length;
-    if (num_active_neighbors > 0) {
-      // become living cell
-      return { world_updates: [{ 
-        x, y, from: 'empty', to: 'active',
-        flags: { emit: [0, 0, 0, 0, 0, 0, 0, 1] },
-      }]};
-    }
-  },
-  immutable: () => {},
-  flag: () => {},
-
-};
diff --git a/src/simulation/lattice_rules.test.js b/src/simulation/lattice_rules.test.js
deleted file mode 100644
index c285711..0000000
--- a/src/simulation/lattice_rules.test.js
+++ /dev/null
@@ -1,147 +0,0 @@
-import { world_update } from '../world/world.js';
-import { lattice_rules } from './lattice_rules.js';
-
-
-function apply(f, n, x0) {
-  if (n == 0) {
-    return x0;
-  } else {
-    return f(apply(f, n-1, x0));
-  }
-}
-
-
-// remove cell team information
-function clean_team(lattice) {
-  return lattice.map(row => row.map(cell => ({...cell, flags: {...cell.flags, team: undefined } })));
-}
-
-
-test("blinker", () => {
-  const L = { type: 'active', flags: { team: undefined, } };
-  const _ = { type: 'empty', flags: { team: undefined, } };
-  const l = { type: 'active', flags: { team: undefined,  emit: [0, 0, 0, 0, 0, 0, 0, 1] } };
-  const d = { type: 'empty', flags: { team: undefined,  emit: [0, 0, 0, 0, 0, 0, 0, -1] } };
-  const lattice = [
-    [ _, _, _, _, _ ],
-    [ _, _, _, _, _ ],
-    [ _, L, L, L, _ ],
-    [ _, _, _, _, _ ],
-    [ _, _, _, _, _ ],
-  ];
-
-  const world = { lattice, lattice_rules, agents: [], senses: [], actions: [], validity: [] };
-  expect(clean_team(world_update(world).lattice)).toEqual([
-    [ _, _, _, _, _ ],
-    [ _, _, l, _, _ ],
-    [ _, d, L, d, _ ],
-    [ _, _, l, _, _ ],
-    [ _, _, _, _, _ ],
-  ]);
-  expect(clean_team(world_update(world_update(world)).lattice)).toEqual([
-    [ _, _, _, _, _ ],
-    [ _, _, d, _, _ ],
-    [ _, l, L, l, _ ],
-    [ _, _, d, _, _ ],
-    [ _, _, _, _, _ ],
-  ]);
-});
-
-
-test("glider", () => {
-  const L = { type: 'active', flags: { team: undefined, } };
-  const _ = { type: 'empty', flags: { team: undefined, } };
-  const l = { type: 'active', flags: { team: undefined,  emit: [0, 0, 0, 0, 0, 0, 0, 1] } };
-  const d = { type: 'empty', flags: { team: undefined,  emit: [0, 0, 0, 0, 0, 0, 0, -1] } };
-  const lattice = [
-    [ _, _, _, _, _, _ ],
-    [ _, _, _, L, _, _ ],
-    [ _, L, _, L, _, _ ],
-    [ _, _, L, L, _, _ ],
-    [ _, _, _, _, _, _ ],
-    [ _, _, _, _, _, _ ],
-  ];
-
-  const world = { lattice, lattice_rules, agents: [], senses: [], actions: [], validity: [] };
-  //expect(clean_team(world_update(world).lattice)).toEqual([
-  expect(clean_team(apply(world_update, 1, world).lattice)).toEqual([
-    [ _, _, _, _, _, _ ],
-    [ _, _, l, d, _, _ ],
-    [ _, d, _, L, l, _ ],
-    [ _, _, L, L, _, _ ],
-    [ _, _, _, _, _, _ ],
-    [ _, _, _, _, _, _ ],
-  ]);
-  expect(clean_team(apply(world_update, 2, world).lattice)).toEqual([
-    [ _, _, _, _, _, _ ],
-    [ _, _, d, l, _, _ ],
-    [ _, _, _, d, L, _ ],
-    [ _, _, L, L, l, _ ],
-    [ _, _, _, _, _, _ ],
-    [ _, _, _, _, _, _ ],
-  ]);
-  expect(clean_team(apply(world_update, 3, world).lattice)).toEqual([
-    [ _, _, _, _, _, _ ],
-    [ _, _, _, d, _, _ ],
-    [ _, _, l, _, L, _ ],
-    [ _, _, d, L, L, _ ],
-    [ _, _, _, l, _, _ ],
-    [ _, _, _, _, _, _ ],
-  ]);
-  expect(clean_team(apply(world_update, 4, world).lattice)).toEqual([
-    [ _, _, _, _, _, _ ],
-    [ _, _, _, _, _, _ ],
-    [ _, _, d, _, L, _ ],
-    [ _, _, l, d, L, _ ],
-    [ _, _, _, L, l, _ ],
-    [ _, _, _, _, _, _ ],
-  ]);
-});
-
-
-test("beehive", () => {
-  const L = { type: 'active', flags: { team: undefined, } };
-  const _ = { type: 'empty', flags: { team: undefined, } };
-  const lattice = [
-    [ _, _, _, _, _, _ ],
-    [ _, _, L, L, _, _ ],
-    [ _, L, _, _, L, _ ],
-    [ _, _, L, L, _, _ ],
-    [ _, _, _, _, _, _ ],
-  ];
-
-  const world = { lattice, lattice_rules, agents: [], senses: [], actions: [], validity: [] };
-  //expect(clean_team(world_update(world).lattice)).toEqual([
-  expect(clean_team(apply(world_update, 1, world).lattice)).toEqual(lattice);
-});
-
-
-test("mutables are activated by neighboring actives", () => {
-  const L = { type: 'active', flags: { team: undefined, } };
-  const _ = { type: 'empty', flags: { team: undefined, } };
-  const l = { type: 'active', flags: { team: undefined,  emit: [0, 0, 0, 0, 0, 0, 0, 1] } };
-  const d = { type: 'empty', flags: { team: undefined,  emit: [0, 0, 0, 0, 0, 0, 0, -1] } };
-  const M = { type: 'mutable', flags: { team: undefined, } };
-
-  const lattice = [
-    [ _, _, _, _, ],
-    [ _, L, M, _, ],
-    [ _, M, M, _, ],
-    [ _, _, _, _, ],
-  ];
-
-  const world = { lattice, lattice_rules, agents: [], senses: [], actions: [], validity: [] };
-
-  expect(clean_team(apply(world_update, 1, world).lattice)).toEqual([
-    [ _, _, _, _, ],
-    [ _, L, l, _, ],
-    [ _, l, l, _, ],
-    [ _, _, _, _, ],
-  ]);
-  expect(clean_team(apply(world_update, 2, world).lattice)).toEqual([
-    [ _, _, _, _, ],
-    [ _, L, L, _, ],
-    [ _, L, L, _, ],
-    [ _, _, _, _, ],
-  ]);
-});
diff --git a/src/simulation/postprocess.js b/src/simulation/postprocess.js
deleted file mode 100644
index d50839e..0000000
--- a/src/simulation/postprocess.js
+++ /dev/null
@@ -1,18 +0,0 @@
-'use strict';
-
-export const postprocess = [
-  (world) => ({
-    ...world,
-    agents: world.agents.map(a => {
-      const {x, y} = a;
-      if (
-        world.lattice[y][x].type === 'mutable' ||
-        world.lattice[y][x].type === 'active'
-    ) {
-        return { ...a, flags: {...a.flags, frozen: true } };
-      } else {
-        return a;
-      }
-    }),
-  }),
-];
diff --git a/src/simulation/postprocess.test.js b/src/simulation/postprocess.test.js
deleted file mode 100644
index dc77c6a..0000000
--- a/src/simulation/postprocess.test.js
+++ /dev/null
@@ -1,37 +0,0 @@
-'use strict';
-
-import { world_update } from '../world/world.js';
-import { postprocess } from './postprocess.js';
-
-test("agents freeze when finishing on a mutable or active", () => {
-  const agent = {
-    id: 1,
-    net: { compute: () => [[1], null] },
-    state: null,
-    x: 0, y: 0,
-    flags: {},
-  };
-
-  const lattice = [[{ type: 'empty', flags: {} }]];
-  
-  const world = {
-    lattice,
-    lattice_rules: { empty: ()=>{}, active: ()=>{}, mutable: ()=>{} },
-    agents: [agent],
-    senses: [],
-    actions: [],
-    validity: [],
-  };
-
-  expect(world_update(world, postprocess).agents[0]).toEqual(agent);
-  world.lattice[0][0].type = 'mutable';
-  expect(world_update(world, postprocess).agents[0]).toEqual({
-    ...agent,
-    flags: { frozen: true },
-  });
-  world.lattice[0][0].type = 'active';
-  expect(world_update(world, postprocess).agents[0]).toEqual({
-    ...agent,
-    flags: { frozen: true },
-  });
-});
diff --git a/src/simulation/senses.js b/src/simulation/senses.js
deleted file mode 100644
index 970f86b..0000000
--- a/src/simulation/senses.js
+++ /dev/null
@@ -1,182 +0,0 @@
-'use strict';
-
-
-const frozen = {
-  size: 1,
-  read: (world, agent) => {
-    if (agent.flags.frozen === true) {
-      return [ 1 ];
-    } else {
-      return [ 0 ];
-    }
-  },
-};
-
-
-// add two arrays together element-wise with a scaling factor
-function array_scalesum(a, s, b) {
-  return a.map((x, i) => x + (s*b[i]));
-}
-// determine the square of the distance between two cells
-function lattice_dist2(x0, y0, x1, y1) {
-  if (x0 === x1 && y0 === y1) { return 1; } // not proper distance but avoids divide-by-zero errors c:
-  return ((x0-x1)**2) + ((y0-y1)**2);
-}
-const hear = {
-  size: 8,
-  read: (world, agent) => {
-    const {x, y} = agent;
-    const lattice_sounds = world.lattice
-      .map((row, cy) => row.map((cell, cx) => [ 1/lattice_dist2(x, y, cx, cy), cell ]))
-      .flat()
-      .filter(([scale, cell]) => cell.flags.emit !== undefined)
-      .reduce(
-        (acc, [scale, cell]) => array_scalesum(acc, scale, cell.flags.emit),
-        [0, 0, 0, 0, 0, 0, 0, 0]
-      );
-    const agent_sounds = world.agents
-      .filter(a => a.flags.emit !== undefined)
-      .reduce(
-        (acc, a) => array_scalesum(acc, 1/lattice_dist2(x, y, a.x, a.y), a.flags.emit),
-        [0, 0, 0, 0, 0, 0, 0, 0]
-      );
-
-    return array_scalesum(lattice_sounds, 1, agent_sounds).map(ch => Math.tanh(ch));
-  },
-};
-
-
-const [VIS_WIDTH, VIS_HEIGHT] = [31, 31];
-const [VIS_HWIDTH, VIS_HHEIGHT] = [Math.floor(VIS_WIDTH/2), Math.floor(VIS_HEIGHT/2)];
-function identity_mod(n, p) {
-  const mod = (n % (2*p)) - p + 1;
-  return mod/p;
-}
-
-function world_pos_to_vision_pos(world, agent, x, y) {
-  const dx = x - agent.x;
-  const dy = y - agent.y;
-  const orientation = agent.flags.orientation || 'n';
-  switch (orientation) {
-    case 'n':
-      return [VIS_HWIDTH+dx, VIS_HEIGHT+dy-1];
-    case 's':
-      return [VIS_HWIDTH-dx, VIS_HEIGHT-dy-1];
-    case 'e':
-      return [VIS_HWIDTH+dy, VIS_HEIGHT-dx-1];
-    case 'w':
-      return [VIS_HWIDTH-dy, VIS_HEIGHT+dx-1];
-  }
-}
-
-function vision_pos_to_world_pos(world, agent, x, y) {
-  const dx = x-VIS_HWIDTH;
-  const dy = y-VIS_HEIGHT+1;
-  const orientation = agent.flags.orientation || 'n';
-  switch (orientation) {
-    case 'n':
-      return [agent.x + dx, agent.y + dy];
-    case 's':
-      return [agent.x - dx, agent.y - dy];
-    case 'e':
-      return [agent.x - dy, agent.y - dx];
-    case 'w':
-      return [agent.x + dy, agent.y + dx];
-  }
-}
-
-function world_pos_to_vision_idx(world, agent, x, y) {
-  const [vx, vy] = world_pos_to_vision_pos(world, agent, x, y);
-  return (VIS_WIDTH * vy) + vx;
-}
-function vision_idx_to_world_pos(world, agent, idx) {
-  const vx = idx % VIS_WIDTH;
-  const vy = Math.floor(idx / VIS_WIDTH);
-  const result = vision_pos_to_world_pos(world, agent, vx, vy);
-  return result;
-}
-
-function see_cell(world, x, y) {
-  const team = 0;
-  const orientation = 0;
-  if (!world.lattice[y] || !world.lattice[y][x]) {
-    // beyond the map edge
-    return [ 0, 0, 0 ];
-  }
-  const type = {
-    active:   -0.8,
-    mutable:  -0.4,
-    empty:     0.0,
-    immutable: 0.4,
-    flag:      0.8,
-  }[world.lattice[y][x].type];
-  return [team, orientation, type];
-}
-
-
-function relative_orientation(viewer, agent) {
-  switch(viewer.flags.orientation) {
-    case 'n': return { n: -0.8, e: -0.4, s: 0.4, w: 0.8 }[agent.flags.orientation];
-    case 'e': return { e: -0.8, s: -0.4, w: 0.4, n: 0.8 }[agent.flags.orientation];
-    case 's': return { s: -0.8, w: -0.4, n: 0.4, e: 0.8 }[agent.flags.orientation];
-    case 'w': return { w: -0.8, n: -0.4, e: 0.4, s: 0.8 }[agent.flags.orientation];
-  }
-}
-
-
-function see_agent(viewer, agent) {
-  const team = {
-    0: -0.8,
-    1: -0.4,
-    2:  0.4,
-    3:  0.8,
-  }[agent.flags.team] + (identity_mod(agent.id, 11)/16);
-  const orientation = relative_orientation(viewer, agent) + (identity_mod(agent.id, 37)/16);
-  const frozen = agent.flags.frozen || agent.flags.pretend_frozen;
-  const type = (() => {
-    if (frozen && agent.flags.flag) {
-      return -0.4;
-    } else if (frozen) {
-      return -0.8;
-    } else if (agent.flags.flag) {
-      return 0.8;
-    } else {
-      return 0.0;
-    }
-  })() + (identity_mod(agent.id, 499)/16);
-  
-  return [team, orientation, type];
-}
-
-
-const see = {
-  size: 3*VIS_WIDTH * VIS_HEIGHT,
-  read: (world, agent) => {
-    const indices = [...Array(VIS_WIDTH*VIS_HEIGHT).keys()]
-    const vision = indices
-      .map(idx => {
-        const [x, y] = vision_idx_to_world_pos(world, agent, idx);
-        return see_cell(world, x, y);
-      });
-    const result = world.agents.reduce(
-      (acc, a) => {
-        const idx = world_pos_to_vision_idx(world, agent, a.x, a.y);
-
-        if (idx < 0 || idx >= VIS_WIDTH*VIS_HEIGHT) {
-          return acc;
-        } else {
-          acc.splice(idx, 1, see_agent(agent, a));
-          return acc;
-        }
-      },
-      vision
-    );
-    return result.flat();
-  },
-};
-
-
-
-export const senses = [
-  frozen, hear, see, { size: 1, read: () => [1] },
-];
diff --git a/src/simulation/senses.test.js b/src/simulation/senses.test.js
deleted file mode 100644
index d3941c7..0000000
--- a/src/simulation/senses.test.js
+++ /dev/null
@@ -1,499 +0,0 @@
-'use strict';
-
-import { senses } from './senses.js';
-
-const [ frozen, hear, see, ...rest ] = senses;
-
-
-test("frozen sense", () => {
-  const agent = {
-    id: 0, x: 0, y: 0,
-    flags: { frozen: true, },
-  };
-
-  expect(frozen.read(null, agent)).toEqual([1]);
-  agent.flags.frozen = false;
-  expect(frozen.read(null, agent)).toEqual([0]);
-});
-
-
-// --===== hearing =====--
-
-test("hear nothing", () => {
-  const agent = { id: 4, x: 1, y: 1, flags: {} };
-  const o = { type: 'empty', flags: {} };
-  const world = {
-    lattice: [
-      [ o, o, o ],
-      [ o, o, o ],
-      [ o, o, o ],
-    ],
-    agents: [agent],
-  };
-
-  expect(hear.read(world, agent)).toEqual([
-    Math.tanh(0), Math.tanh(0), Math.tanh(0), Math.tanh(0),
-    Math.tanh(0), Math.tanh(0), Math.tanh(0), Math.tanh(0),
-  ]);
-});
-
-
-test("hear self", () => {
-  const agent = { id: 4, x: 1, y: 1, flags: { emit: [1, 0, 0.5, 0, 0, 0, 0, 1] } };
-  const o = { type: 'empty', flags: {} };
-  const world = {
-    lattice: [
-      [ o, o, o ],
-      [ o, o, o ],
-      [ o, o, o ],
-    ],
-    agents: [agent],
-  };
-
-  expect(hear.read(world, agent)).toEqual([
-    Math.tanh(1), Math.tanh(0), Math.tanh(0.5), Math.tanh(0),
-    Math.tanh(0), Math.tanh(0), Math.tanh(0), Math.tanh(1),
-  ]);
-});
-
-
-test("hear cells", () => {
-  const agent = { id: 4, x: 2, y: 2, flags: {} };
-  const o = { type: 'empty', flags: {} };
-  const s = { type: 'empty', flags: { emit: [1, 0.5, 0.25, 0.125, 0, 0, 0, 0] } };
-  const world = {
-    lattice: [
-      [ o, o, s, o, o ],
-      [ o, o, o, o, o ],
-      [ o, s, o, o, o ],
-      [ o, o, o, o, o ],
-      [ o, o, o, o, o ],
-    ],
-    agents: [agent],
-  };
-
-  expect(hear.read(world, agent)).toEqual([
-    Math.tanh(1.25), Math.tanh(0.625), Math.tanh(0.3125), Math.tanh(0.15625), 
-    Math.tanh(0), Math.tanh(0), Math.tanh(0), Math.tanh(0),
-  ]);
-});
-
-
-test("hear cells & agents", () => {
-  const agent = { id: 4, x: 2, y: 2, flags: {} };
-  const agent2 = { id: 0, x: 2, y: 4, flags: { emit: [0, 0, 0, 0, 1, 1, 1, 1] } };
-  const o = { type: 'empty', flags: {} };
-  const s = { type: 'empty', flags: { emit: [1, 0.5, 0.25, 0.125, 0, 0, 0, 0] } };
-  const world = {
-    lattice: [
-      [ o, o, s, o, o ],
-      [ o, o, o, o, o ],
-      [ o, s, o, o, o ],
-      [ o, o, o, o, o ],
-      [ o, o, o, o, o ],
-    ],
-    agents: [agent, agent2],
-  };
-
-  expect(hear.read(world, agent)).toEqual([
-    Math.tanh(1.25), Math.tanh(0.625), Math.tanh(0.3125), Math.tanh(0.15625), 
-    Math.tanh(0.25), Math.tanh(0.25), Math.tanh(0.25), Math.tanh(0.25),
-  ]);
-});
-
-
-// --===== vision =====--
-
-
-test("see agents", () => {
-  const o = { type: 'empty', flags: {} };
-  const lattice = [
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-    [ o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o, o ],
-  ];
-  const agentA = { id: 0, x: 15, y: 30, flags: { team: 0, orientation: 'n' } };
-  const agentB = { id: 1, x: 15, y: 0,  flags: { team: 1, orientation: 's' } };
-  const agentC = { id: 2, x: 0,  y: 15,  flags: { team: 2, orientation: 'e', flag: true } };
-  const agentD = { id: 3, x: 30, y: 15, flags: { team: 3, orientation: 'w', frozen: true } };
-  const agentE = { id: 4, x: 30, y: 30, flags: { team: 0, orientation: 's', flag: true, frozen: true } };
-  const world = {
-    lattice,
-    agents: [agentA, agentB, agentC, agentD, agentE],
-  };
-
-  const an = [ 
-    -0.8 + 0.0625*(-10/11),   // team + identity
-    -0.8 + 0.0625*(-36/37),   // orientation + identity
-     0.0 + 0.0625*(-498/499), // class + identity
-  ];
-  const as = [ 
-    -0.8 + 0.0625*(-10/11),   // team + identity
-     0.4 + 0.0625*(-36/37),   // orientation + identity
-     0.0 + 0.0625*(-498/499), // class + identity
-  ];
-  const ae = [ 
-    -0.8 + 0.0625*(-10/11),   // team + identity
-    -0.4 + 0.0625*(-36/37),   // orientation + identity
-     0.0 + 0.0625*(-498/499), // class + identity
-  ];
-  const aw = [ 
-    -0.8 + 0.0625*(-10/11),   // team + identity
-     0.8 + 0.0625*(-36/37),   // orientation + identity
-     0.0 + 0.0625*(-498/499), // class + identity
-  ];
-
-  const bn = [ 
-    -0.4 + 0.0625*(-9/11),    // team + identity
-    -0.8 + 0.0625*(-35/37),   // orientation + identity
-     0.0 + 0.0625*(-497/499), // class + identity
-  ];
-  const bs = [ 
-    -0.4 + 0.0625*(-9/11),    // team + identity
-     0.4 + 0.0625*(-35/37),   // orientation + identity
-     0.0 + 0.0625*(-497/499), // class + identity
-  ];
-  const be = [ 
-    -0.4 + 0.0625*(-9/11),    // team + identity
-    -0.4 + 0.0625*(-35/37),   // orientation + identity
-     0.0 + 0.0625*(-497/499), // class + identity
-  ];
-  const bw = [ 
-    -0.4 + 0.0625*(-9/11),    // team + identity
-     0.8 + 0.0625*(-35/37),   // orientation + identity
-     0.0 + 0.0625*(-497/499), // class + identity
-  ];
-
-  const cn = [ 
-     0.4 + 0.0625*(-8/11),    // team + identity
-    -0.8 + 0.0625*(-34/37),   // orientation + identity
-     0.8 + 0.0625*(-496/499), // class + identity
-  ];
-  const cs = [ 
-     0.4 + 0.0625*(-8/11),    // team + identity
-     0.4 + 0.0625*(-34/37),   // orientation + identity
-     0.8 + 0.0625*(-496/499), // class + identity
-  ];
-  const ce = [ 
-     0.4 + 0.0625*(-8/11),    // team + identity
-    -0.4 + 0.0625*(-34/37),   // orientation + identity
-     0.8 + 0.0625*(-496/499), // class + identity
-  ];
-  const cw = [ 
-     0.4 + 0.0625*(-8/11),    // team + identity
-     0.8 + 0.0625*(-34/37),   // orientation + identity
-     0.8 + 0.0625*(-496/499), // class + identity
-  ];
-
-  const dn = [ 
-     0.8 + 0.0625*(-7/11),    // team + identity
-    -0.8 + 0.0625*(-33/37),   // orientation + identity
-    -0.8 + 0.0625*(-495/499), // class + identity
-  ];
-  const ds = [ 
-     0.8 + 0.0625*(-7/11),    // team + identity
-     0.4 + 0.0625*(-33/37),   // orientation + identity
-    -0.8 + 0.0625*(-495/499), // class + identity
-  ];
-  const de = [ 
-     0.8 + 0.0625*(-7/11),    // team + identity
-    -0.4 + 0.0625*(-33/37),   // orientation + identity
-    -0.8 + 0.0625*(-495/499), // class + identity
-  ];
-  const dw = [ 
-     0.8 + 0.0625*(-7/11),    // team + identity
-     0.8 + 0.0625*(-33/37),   // orientation + identity
-    -0.8 + 0.0625*(-495/499), // class + identity
-  ];
-
-  const en = [ 
-    -0.8 + 0.0625*(-6/11),    // team + identity
-    -0.8 + 0.0625*(-32/37),   // orientation + identity
-    -0.4 + 0.0625*(-494/499), // class + identity
-  ];
-  const es = [ 
-    -0.8 + 0.0625*(-6/11),    // team + identity
-     0.4 + 0.0625*(-32/37),   // orientation + identity
-    -0.4 + 0.0625*(-494/499), // class + identity
-  ];
-  const ee = [ 
-    -0.8 + 0.0625*(-6/11),    // team + identity
-    -0.4 + 0.0625*(-32/37),   // orientation + identity
-    -0.4 + 0.0625*(-494/499), // class + identity
-  ];
-  const ew = [ 
-    -0.8 + 0.0625*(-6/11),    // team + identity
-     0.8 + 0.0625*(-32/37),   // orientation + identity
-    -0.4 + 0.0625*(-494/499), // class + identity
-  ];
-
-  const _ = [
-    0.0, 0.0, 0.0,
-  ];
-
-
-  expect(see.read(world, agentA)).toEqual([
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, bs, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    ce, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, dw, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, an, _, _, _, _, _, _, _, _, _, _, _, _, _, _, es, 
-  ]);
-  expect(see.read(world, agentB)).toEqual([
-    en, _, _, _, _, _, _, _, _, _, _, _, _, _, _, as, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    de, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, cw, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, bn, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-  ]);
-  expect(see.read(world, agentC)).toEqual([
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, ds, _, _, _, _, _, _, _, _, _, _, _, _, _, _, ee, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    be, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, aw, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, cn, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-  ]);
-  expect(see.read(world, agentD)).toEqual([
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, cs, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    ae, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, bw, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    ew, _, _, _, _, _, _, _, _, _, _, _, _, _, _, dn, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-  ]);
-});
-
-
-test("seeing 'nothing' looks like teamless empty squares", () => {
-  const lattice = [[]];
-  const agent = { id: 0, x: 0, y: 0, flags: { team: 0, orientation: 'n' } };
-  const world = {
-    lattice, agents: [agent],
-  };
-
-  const _ = [
-    0.0, 0.0, 0.0,
-  ];
-  const an = [ 
-    -0.8 + 0.0625*(-10/11),   // team + identity
-    -0.8 + 0.0625*(-36/37),   // orientation + identity
-     0.0 + 0.0625*(-498/499), // class + identity
-  ];
-
-  expect(see.read(world, agent)).toEqual([
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, an, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-  ]);
-});
-
-
-test("agents pretending to be frozen appear frozen", () => {
-  const lattice = [[]];
-  const agent = { id: 0, x: 0, y: 0, flags: { team: 0, orientation: 'n', pretend_frozen: true } };
-  const world = {
-    lattice, agents: [agent],
-  };
-
-  const _ = [
-    0.0, 0.0, 0.0,
-  ];
-  const an = [ 
-    -0.8 + 0.0625*(-10/11),   // team + identity
-    -0.8 + 0.0625*(-36/37),   // orientation + identity
-    -0.8 + 0.0625*(-498/499), // class + identity
-  ];
-
-  expect(see.read(world, agent)).toEqual([
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-    _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, an, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, 
-  ]);
-});
diff --git a/src/simulation/trial.js b/src/simulation/trial.js
deleted file mode 100644
index b4462c5..0000000
--- a/src/simulation/trial.js
+++ /dev/null
@@ -1,12 +0,0 @@
-'use strict';
-
-import { create_team, create_epoch, update_epoch } from './game.js';
-
-const start_teams = [...Array(50)].map(x => create_team(32, 5, 5));
-
-let epoch = create_epoch(start_teams);
-
-while (epoch.epoch < 1) {
-  console.log(epoch.epoch, epoch.time, epoch.game.time);
-  epoch = update_epoch(epoch);
-}
diff --git a/src/simulation/validity.js b/src/simulation/validity.js
deleted file mode 100644
index de4acd1..0000000
--- a/src/simulation/validity.js
+++ /dev/null
@@ -1,14 +0,0 @@
-export const validity = [
-  // prevent agents from moving onto immutables
-  (world, proposal) => (proposal.agent_changes || []).reduce(
-    (acc, change) => {
-      const {x, y} = change;
-      if (x !== undefined && y !== undefined && world.lattice[y][x].type === 'immutable') {
-        return false;
-      } else {
-        return acc;
-      }
-    },
-    true,
-  ),
-];
diff --git a/src/simulation/validity.test.js b/src/simulation/validity.test.js
deleted file mode 100644
index ba9e684..0000000
--- a/src/simulation/validity.test.js
+++ /dev/null
@@ -1,43 +0,0 @@
-'use strict';
-
-import { world_update } from '../world/world.js';
-import { validity } from './validity.js';
-
-test("agents are not allowed to move into immutables", () => {
-  const actions = [{
-    size: 1, propose: (world, agent, head) => {
-      return [{
-        agent_changes: [{
-          agent_id: agent.id,
-          x: agent.x + 1, y: agent.y,
-        }],
-      }];
-    },
-  }];
-
-  const agent = {
-    id: 1,
-    net: { compute: () => [[1], null] },
-    state: null,
-    x: 0, y: 0,
-    flags: {},
-  };
-
-  const lattice = [[{ type: 'empty', flags: {} }, { type: 'immutable', flags: {} }]];
-  
-  const world = {
-    lattice,
-    lattice_rules: { empty: ()=>{}, immutable: ()=>{} },
-    agents: [agent],
-    senses: [],
-    actions,
-    validity,
-  };
-
-  expect(world_update(world).agents[0]).toEqual(agent);
-  world.validity = [];
-  expect(world_update(world).agents[0]).toEqual({
-    ...agent,
-    x: 1, y: 0,
-  });
-});