From a2ae7aae8357c8c2684d85fd58b0c5a0563ebab9 Mon Sep 17 00:00:00 2001
From: sanine-a <sanine.not@pm.me>
Date: Tue, 9 May 2023 11:31:17 -0500
Subject: refactor: split ecs systems into multiple files

---
 honey/ecs/collision.lua | 57 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 honey/ecs/collision.lua

(limited to 'honey/ecs/collision.lua')

diff --git a/honey/ecs/collision.lua b/honey/ecs/collision.lua
new file mode 100644
index 0000000..722c256
--- /dev/null
+++ b/honey/ecs/collision.lua
@@ -0,0 +1,57 @@
+local glm = require 'honey.glm'
+local Vec3 = glm.Vec3
+local ode = honey.ode
+
+local module = {}
+setmetatable(module, {__index=_G})
+setfenv(1, module)
+
+
+--===== collision space =====--
+
+
+local function createGeom(self, id, collision)
+	local geom
+	if collision.class == "sphere" then
+		geom = ode.CreateSphere(self.space, collision.radius)
+	elseif collision.class == "capsule" then
+		geom = ode.CreateCapsule(self.space, collision.radius, collision.length)
+	elseif collision.class == "plane" then
+		local node = self.db:getComponent(id, "node")
+		local m = node.matrix
+		local normal = node.matrix:mulv3(Vec3{0,1,0}):normalize()
+		local position = Vec3{m[1][4], m[2][4], m[3][4]}
+		print(position)
+		local d = normal:dot(position)
+		print(normal, d)
+		geom = ode.CreatePlane(self.space, normal[1], normal[2], normal[3], d)
+	end
+	collision._geom = geom
+	collision._gc = honey.util.gc_canary(function()
+		print("release geom for id"..id)
+		ode.GeomDestroy(geom)
+	end)
+end
+
+system = function(params)
+	local db = params.db
+	local space = params.space
+	return {
+		db=db,
+		space=space,
+		priority=0,
+		update = function(self, dt)
+			local query = self.db:queryComponent("collision")
+			for id, collision in pairs(query) do
+				if not collision._geom then
+					createGeom(self, id, collision)
+					print(id, collision._geom)
+				end
+			end
+		end
+	}
+end
+
+
+
+return module
-- 
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