From 447ef02774712b36f3c96f1016e77b3218870fd1 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Sun, 26 Mar 2023 00:09:14 -0500
Subject: fix invisible physics objects bug

---
 main.lua | 34 ++++++++++++++++++++++++++--------
 1 file changed, 26 insertions(+), 8 deletions(-)

diff --git a/main.lua b/main.lua
index ceba194..2463bdd 100644
--- a/main.lua
+++ b/main.lua
@@ -1,5 +1,6 @@
 require 'honey.std'
 local paused = true
+local balls = {}
 
 local function formatize(f)
 	return function(fmt, ...)
@@ -44,7 +45,7 @@ local vw, vh = 640, 480
 
 -- create camera matrices
 local camera = {
-	view=Mat4():identity():translate(Vec3{0, 0, -20}),
+	view=Mat4():identity():translate(Vec3{0, 0, -30}),
 	projection=Mat4():perspective(math.rad(45), 640/480, 0.1, 100),
 }
 
@@ -89,6 +90,8 @@ level:addSystem{
 				}
 				local collisions = ode.Collide(o1, o2, 1)
 				if #collisions > 0 then
+					local e1 = ode.GeomGetData(o1)
+					local e2 = ode.GeomGetData(o2)
 					ode.ContactSetGeom(contact, collisions[1])
 					local joint = ode.JointCreateContact(self.world, self.contactgroup, contact)
 					ode.JointAttach(joint, b1, b2)
@@ -108,6 +111,11 @@ level:addSystem{
 		local d, a, b, c = ode.BodyGetQuaternion(entity.physicsBody)
 		entity.transform:identity():translate(Vec3{x, y, z}):mul(Quaternion{a, b, c, d}:toMat4())
 	end,
+	onRemoveEntity = function(self, id, entity)
+		print("remove", id)
+		ode.GeomDestroy(entity.collisionShape)
+		ode.BodyDestroy(entity.physicsBody)
+	end,
 }
 
 -- create shader
@@ -152,11 +160,11 @@ local leaf = {
 	mesh=tetra,
 	shader=shader,
 }
---local root = growLine(leaf, 24)
---root.update = function(self, dt)
---	self.transform:rotateY(0.2 * math.pi * dt)
---end
---level:addEntity(root)
+local root = growLine(leaf, 24)
+root.update = function(self, dt)
+	self.transform:rotateY(0.2 * math.pi * dt)
+end
+level:addEntity(root)
 
 local groundPlane = {
 	transform=Mat4():identity():translate(Vec3{0, -2, 0}):scale(Vec3{10, 10, 10}),
@@ -167,7 +175,6 @@ local groundPlane = {
 level:addEntity(groundPlane)
 
 
-local balls = {}
 local function createNewBall()
 	local ball = {
 		transform=Mat4():identity(),
@@ -177,7 +184,9 @@ local function createNewBall()
 		collisionShape=ode.CreateSphere(space, 1.0),
 		physicsBody=ode.BodyCreate(world),
 	}
+
 	local id = level:addEntity(ball)
+	ball.id = id
 	table.insert(balls, id)
 	if #balls > 200 then
 		level:removeEntity(table.remove(balls, 1))
@@ -191,6 +200,7 @@ local function createNewBall()
 	ode.GeomSetBody(ball.collisionShape, ball.physicsBody)
 	ode.BodySetPosition(ball.physicsBody, x, y, z)
 	ode.BodySetLinearVel(ball.physicsBody, x, y, z)
+	ode.GeomSetData(ball.collisionShape, ball)
 end
 createNewBall()
 
@@ -203,7 +213,15 @@ window:setKeyCallback(function(_, key, scancode, action)
 			window:setShouldClose(true)
 		elseif key == glfw.KEY_SPACE then
 			paused = not paused
-		elseif key == glfw.KEY_B or key == glfw.KEY_V then
+		elseif 
+			key == glfw.KEY_Z or 
+			key == glfw.KEY_X or 
+			key == glfw.KEY_C or 
+			key == glfw.KEY_V or
+			key == glfw.KEY_B or 
+			key == glfw.KEY_N or
+			key == glfw.KEY_M
+			then
 			createNewBall()
 		end
 	end
-- 
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