From a45f73c7388b3f5a5901bfcc66fd2d1df58d3001 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Wed, 22 Mar 2023 10:02:47 -0500
Subject: add update function system

---
 main.lua | 43 ++++++++++++++++++++++---------------------
 1 file changed, 22 insertions(+), 21 deletions(-)

(limited to 'main.lua')

diff --git a/main.lua b/main.lua
index c9b1733..251f466 100644
--- a/main.lua
+++ b/main.lua
@@ -34,16 +34,16 @@ function recursiveComputeTransform(entity)
 	return entity._transform
 end
 
-local world = ecs.World()
+local level = ecs.Level()
 -- update transforms
-world:addSystem{
+level:addSystem{
 	filter=ecs.Filter.AND{"transform", "parent"},
 	update=function(entity, dt)
 		recursiveComputeTransform(entity)
 	end,
 	priority=1,
 }
-world:addSystem{
+level:addSystem{
 	filter=ecs.Filter.AND{"transform", "parent"},
 	update=function(entity, dt)
 		entity._transform = nil
@@ -53,7 +53,7 @@ world:addSystem{
 }
 
 -- render objects
-world:addSystem{
+level:addSystem{
 	filter=ecs.Filter.AND{"mesh", "shader", "transform"},
 	update=function(entity, dt)
 		entity.shader:use()
@@ -69,7 +69,14 @@ world:addSystem{
 	priority=99,
 }
 
-
+-- run custom scripts
+level:addSystem{
+	filter=ecs.Filter.AND{"update"},
+	update=function(entity, dt)
+		entity.update(entity, dt)
+	end,
+	priority=50,
+}
 
 
 
@@ -132,6 +139,12 @@ local dodeca = honey.mesh.loadFile("assets/dodecahedron.obj")[1]
 local icosa  = honey.mesh.loadFile("assets/icosahedron.obj")[1]
 
 
+function updateTransform(self, dt)
+	self.transform:rotateY(0.3 * math.pi * dt)
+	self.transform:rotateX(0.1 * math.pi * dt)
+end
+
+
 function growLine(prev, depth)
 	if depth == 0 then return prev end
 
@@ -139,10 +152,11 @@ function growLine(prev, depth)
 		transform=Mat4.Identity(),
 		mesh=octa,
 		shader=shader,
+		update=updateTransform,
 	}
 	entity.transform:translate(Vec3{2, 0, 0})
 	prev.parent = entity
-	world:addEntity(prev)
+	level:addEntity(prev)
 	return growLine(entity, depth-1)
 end
 
@@ -154,18 +168,7 @@ local leaf = {
 }
 local root = growLine(leaf, 24)
 root.parent = false
-world:addEntity(root)
-
-
-function updateTransforms(dt)
-	local entity = leaf
-	while entity ~= false do
-		entity.transform:rotateY(0.3 * math.pi * dt)
-		entity.transform:rotateX(0.1 * math.pi * dt)
-		entity = entity.parent	
-	end
-end
-
+level:addEntity(root)
 
 
 window:setKeyCallback(function(_, key)
@@ -182,12 +185,10 @@ while not window:shouldClose() do
 	local dt = time - prevTime
 	prevTime = time
 
-	updateTransforms(dt)
-
 	gl.ClearColor(0.2, 0.4, 1.0, 1.0)
 	gl.Clear(gl.COLOR_BUFFER_BIT + gl.DEPTH_BUFFER_BIT)
 
-	world:update(dt)
+	level:update(dt)
 
 	window:swapBuffers()
 	glfw.PollEvents()
-- 
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