add message-passing

1 files changed, 18 insertions, 4 deletions

diff --git a/main.lua b/main.lua
index f5512b0..5ef09dd 100644
--- a/main.lua
+++ b/main.lua
@@ -43,9 +43,18 @@ package.loaded['baseRotationScript'] = function(db, id, dt)
 	transform.matrix:rotateZ(math.pi * dt)
 end
 package.loaded['cameraRotationScript'] = function(db, id, dt)
-		local transform = db:getComponent(id, "transform")
-		transform.matrix:identity():translate(Vec3{0, 0, -6 + math.sin(math.pi * glfw.GetTime())})
+	local transform = db:getComponent(id, "transform")
+	transform.matrix:identity():translate(Vec3{0, 0, -6 + math.sin(math.pi * glfw.GetTime())})
+end
+
+
+function transmitMessage(msg, data)
+	local query = db:queryComponent(msg)
+	for id, handler in pairs(query) do
+		local f = require(handler.scriptName)
+		f(db, id, data)
 	end
+end
 
 
 local id = db:createEntity()
@@ -87,11 +96,16 @@ end)
 -- resize window correctly
 window:setFramebufferSizeCallback(function(_, width, height)
 	gl.Viewport(0, 0, width, height)
-	local cameraParams = db:getComponent(camera, "camera")
-	cameraParams.projection:perspectiveResize(width/height)
 	vw, vh = width, height
+	transmitMessage("onWindowResize", { width=width, height=height })
 end)
 
+package.loaded["cameraHandleResize"] = function(db, id, data)
+	local camera = db:getComponent(id, "camera")
+	camera.projection:perspectiveResize(data.width/data.height)
+end
+db:addComponent(camera, "onWindowResize", { scriptName = "cameraHandleResize" })
+
 -- averager (for fps)
 function averager(memory)
 	local buf = {}