set rocket to relatively constant velocity

1 files changed, 26 insertions, 7 deletions

diff --git a/levelSelect.js b/levelSelect.js
index 2fe3d52..238639c 100644
--- a/levelSelect.js
+++ b/levelSelect.js
@@ -1,18 +1,37 @@
 import{ setupLevel, setupLevelUi } from './level.js';
 
+
+function buildLevel(x, y, t) {
+  const ts = t.slice(0, -1);
+  const tf = t[t.length-1];
+  return setupLevel(ts.map(T => [ x(T), y(T) ]), [ x(tf), y(tf) ]);
+}
+
 const levels = {
   'initial jump': [ [], setupLevel([], [8, 0]) ],
   'monopole harvesting': [ ['initial jump'], setupLevel([[3, 3]], [8,8]) ],
-  'parabolic': [ ['initial jump', 'monopole harvesting'], setupLevel([[-2, 4], [0,0], [2, 4]], [3,9]) ],
+  'parabolic 0': [ ['initial jump', 'monopole harvesting'], setupLevel([[-2, 4], [0,0], [2, 4]], [3,9]) ],
   'sinusoidal': [ 
     ['initial jump', 'monopole harvesting'], 
-    setupLevel([ 
-      [-4, 4*Math.sin(0)], 
-      [0.5*Math.PI - 4, 4*Math.sin(0.5*Math.PI)], 
-      [1.0*Math.PI - 4, 4*Math.sin(1.0*Math.PI)], 
-      [1.5*Math.PI - 4, 4*Math.sin(1.5*Math.PI)], 
-    ], [2.0*Math.PI - 4, 4*Math.sin(2.0*Math.PI)]),
+    buildLevel(t => t-4, t => 4 * Math.sin(t), [...Array(8).keys()].map(x => Math.PI * x / 4)),
+  ],
+  'parabolic 1': [ 
+    ['parabolic 0'],
+    buildLevel(t => -0.5*(t-3)**2 + 4, t => t-3, [...Array(8).keys()].map(x => x - 2)),
   ],
+  'orbital': [ 
+    ['parabolic 0', 'sinusoidal'],
+    buildLevel(t => 8*Math.cos(t), t => 8*Math.sin(t), [...Array(8).keys()].map(x => Math.PI * x / 4)),
+  ],
+  'lissajous 0': [ 
+    ['orbital'],
+    buildLevel(t => 8*Math.cos(3*t), t => 8*Math.sin(2*t), [...Array(8).keys()].map(x => Math.PI * x / 4)),
+  ],
+  'lissajous 1': [ 
+    ['orbital'],
+    buildLevel(t => 8*Math.sin(4*t), t => 8*Math.cos(3*t), [...Array(16).keys()].map(x => Math.PI * x / 8)),
+  ],
+
 };
 
 export function setupLevelSelectUi(root, sfx) {