singled out the drawing into one function with background and foreground callbacks, this will draw the refraction and reflection without the post shader

examples/complex.lua

@@ -89,10 +89,15 @@ function love.load()
 	-- light world
 	lightRange = 400
 	lightSmooth = 1.0
-	lightWorld = LightWorld()
+
-	lightWorld:setAmbientColor(15, 15, 31)
+	lightWorld = LightWorld({
-	lightWorld:setRefractionStrength(16.0)
+    ambient = {15,15,15},
-	lightWorld:setReflectionVisibility(0.75)
+    refractionStrength = 16.0,
+    reflectionVisibility = 0.75,
+    drawBackground = drawBackground,
+    drawForground = drawForground
+  })
+
 	mouseLight = lightWorld:newLight(0, 0, 255, 191, 127, lightRange)
 	mouseLight:setGlowStrength(0.3)
 	mouseLight:setSmooth(lightSmooth)
@@ -224,95 +229,12 @@ function love.update(dt)
 end
 
 function love.draw()
-	lightWorld:update()
 	-- set shader buffer
 	if bloomOn then
 		love.postshader.setBuffer("render")
 	end
 
-	love.graphics.setBlendMode("alpha")
+  lightWorld:draw()
-	if normalOn then
-		love.graphics.setColor(127, 127, 255)
-		love.graphics.rectangle("fill", 0, 0, love.graphics.getWidth(), love.graphics.getHeight())
-	else
-		love.graphics.setColor(255, 255, 255)
-		if textureOn then
-			love.graphics.draw(imgFloor, quadScreen, offsetX % 32 - 32, offsetY % 24 - 24)
-		else
-			love.graphics.rectangle("fill", 0, 0, love.graphics.getWidth(), love.graphics.getHeight())
-		end
-	end
-
-	for i = 1, phyCnt do
-		if phyLight[i]:getType() == "refraction" then
-			if not normalOn then
-				--if math.mod(i, 2) == 0  then
-					love.graphics.setBlendMode("alpha")
-					love.graphics.setColor(255, 255, 255, 191)
-					love.graphics.draw(water, phyLight[i].x - phyLight[i].ox, phyLight[i].y - phyLight[i].oy)
-				--else
-					--love.graphics.setBlendMode("multiplicative")
-					--math.randomseed(i)
-					--love.graphics.setColor(math.random(0, 255), math.random(0, 255), math.random(0, 255))
-					--love.graphics.rectangle("fill", phyLight[i].x - phyLight[i].ox, phyLight[i].y - phyLight[i].oy, 128, 128)
-				--end
-			end
-		end
-	end
-
-	-- draw lightmap shadows
-	if lightOn and not normalOn then
-		lightWorld:drawShadow()
-	end
-
-	for i = 1, phyCnt do
-		math.randomseed(i)
-		love.graphics.setColor(math.random(0, 255), math.random(0, 255), math.random(0, 255))
-		if phyLight[i]:getType() == "polygon" then
-			love.graphics.polygon("fill", phyLight[i]:getPoints())
-		elseif phyLight[i]:getType() == "circle" then
-			love.graphics.circle("fill", phyLight[i]:getX(), phyLight[i]:getY(), phyLight[i]:getRadius())
-		end
-	end
-
-	-- draw lightmap shine
-	if lightOn and not normalOn then
-		lightWorld:drawShine()
-	end
-
-	love.graphics.setBlendMode("alpha")
-	for i = 1, phyCnt do
-		if phyLight[i]:getType() == "image" then
-			if normalOn and phyLight[i].normal then
-				love.graphics.setColor(255, 255, 255)
-				love.graphics.draw(phyLight[i].normal, phyLight[i].x - phyLight[i].nx, phyLight[i].y - phyLight[i].ny)
-			elseif not phyLight[i].material then
-				math.randomseed(i)
-				love.graphics.setColor(math.random(127, 255), math.random(127, 255), math.random(127, 255))
-				love.graphics.draw(phyLight[i].img, phyLight[i].x - phyLight[i].ix, phyLight[i].y - phyLight[i].iy)
-			end
-		end
-	end
-
-	if not normalOn then
-		lightWorld:drawMaterial()
-	end
-
-	-- draw pixel shadow
-	if lightOn and not normalOn then
-		lightWorld:drawPixelShadow()
-	end
-
-	-- draw glow
-	if lightOn and not normalOn then
-		lightWorld:drawGlow()
-	end
-
-	-- draw reflection
-	lightWorld:drawReflection()
-
-	-- draw refraction
-	lightWorld:drawRefraction()
 
 	love.graphics.draw(imgLight, mx - 5, (my - 5) - (16.0 + (math.sin(lightDirection) + 1.0) * 64.0))
 
@@ -432,6 +354,61 @@ function love.draw()
 	love.postshader.draw()
 end
 
+function drawBackground(l,t,w,h)
+	love.graphics.setBlendMode("alpha")
+	if normalOn then
+		love.graphics.setColor(127, 127, 255)
+		love.graphics.rectangle("fill", 0, 0, love.graphics.getWidth(), love.graphics.getHeight())
+	else
+		love.graphics.setColor(255, 255, 255)
+		if textureOn then
+			love.graphics.draw(imgFloor, quadScreen, offsetX % 32 - 32, offsetY % 24 - 24)
+		else
+			love.graphics.rectangle("fill", 0, 0, love.graphics.getWidth(), love.graphics.getHeight())
+		end
+	end
+
+	for i = 1, phyCnt do
+		if phyLight[i]:getType() == "refraction" then
+			if not normalOn then
+        love.graphics.setBlendMode("alpha")
+        love.graphics.setColor(255, 255, 255, 191)
+        love.graphics.draw(water, phyLight[i].x - phyLight[i].ox, phyLight[i].y - phyLight[i].oy)
+			end
+		end
+	end
+end
+
+function drawForground(l,t,w,h)
+	for i = 1, phyCnt do
+		math.randomseed(i)
+		love.graphics.setColor(math.random(0, 255), math.random(0, 255), math.random(0, 255))
+		if phyLight[i]:getType() == "polygon" then
+			love.graphics.polygon("fill", phyLight[i]:getPoints())
+		elseif phyLight[i]:getType() == "circle" then
+			love.graphics.circle("fill", phyLight[i]:getX(), phyLight[i]:getY(), phyLight[i]:getRadius())
+		end
+	end
+
+	love.graphics.setBlendMode("alpha")
+	for i = 1, phyCnt do
+		if phyLight[i]:getType() == "image" then
+			if normalOn and phyLight[i].normal then
+				love.graphics.setColor(255, 255, 255)
+				love.graphics.draw(phyLight[i].normal, phyLight[i].x - phyLight[i].nx, phyLight[i].y - phyLight[i].ny)
+			elseif not phyLight[i].material then
+				math.randomseed(i)
+				love.graphics.setColor(math.random(127, 255), math.random(127, 255), math.random(127, 255))
+				love.graphics.draw(phyLight[i].img, phyLight[i].x - phyLight[i].ix, phyLight[i].y - phyLight[i].iy)
+			end
+		end
+	end
+
+	if not normalOn then
+		lightWorld:drawMaterial(l,t,w,h)
+	end
+end
+
 function love.mousepressed(x, y, c)
 	if c == "m" then
 		-- add light

examples/short.lua

@@ -1,6 +1,5 @@
+require 'lib/postshader'
 -- Example: Short Example
-require "lib/postshader"
-
 local gamera     = require "vendor/gamera"
 local LightWorld = require "lib/light_world"
 
@@ -14,14 +13,16 @@ function love.load()
 	glow = love.graphics.newImage("gfx/machine2_glow.png")
 
 	-- create light world
-	lightWorld = LightWorld()
+	lightWorld = LightWorld({
+    drawBackground = drawBackground,
+    drawForground = drawForground
+  })
 	lightWorld:setAmbientColor(15, 15, 31)
 	lightWorld:setRefractionStrength(32.0)
 
 	-- create light
 	lightMouse = lightWorld:newLight(0, 0, 255, 127, 63, 300)
 	lightMouse:setGlowStrength(0.3)
-	--lightMouse:setSmooth(0.01)
 
 	-- create shadow bodys
 	circleTest = lightWorld:newCircle(256, 256, 16)
@@ -34,15 +35,7 @@ function love.load()
 
 	-- create body object
 	objectTest = lightWorld:newRefraction(normal, 64, 64, 128, 128)
-	--objectTest:setShine(false)
-	--objectTest:setShadowType("rectangle")
-	--objectTest:setShadowDimension(64, 64)
 	objectTest:setReflection(true)
-
-	-- set background
-	quadScreen = love.graphics.newQuad(0, 0, love.window.getWidth(), love.window.getHeight(), 32, 24)
-	imgFloor = love.graphics.newImage("gfx/floor.png")
-	imgFloor:setWrap("repeat", "repeat")
 end
 
 function love.update(dt)
@@ -74,19 +67,20 @@ end
 
 function love.draw()
   camera:draw(function(l,t,w,h)
-    lightWorld:update(l,t,w,h)
+    lightWorld:draw(l,t,w,h,scale)
-    love.graphics.setColor(255, 255, 255)
-    love.graphics.rectangle("fill", 0, 0, 2000, 2000)
-    lightWorld:drawShadow(l,t,w,h)
-    love.graphics.setColor(63, 255, 127)
-    love.graphics.circle("fill", circleTest:getX(), circleTest:getY(), circleTest:getRadius())
-    love.graphics.polygon("fill", rectangleTest:getPoints())
-    love.graphics.setColor(255, 255, 255)
-    love.graphics.draw(image, 64 - image:getWidth() * 0.5, 64 - image:getHeight() * 0.5)
-    lightWorld:drawShine(l,t,w,h)
-    lightWorld:drawPixelShadow(l,t,w,h)
-    lightWorld:drawGlow(l,t,w,h)
-    lightWorld:drawRefraction(l,t,w,h)
-    lightWorld:drawReflection(l,t,w,h)
   end)
 end
+
+function drawBackground(l,t,w,h)
+  love.graphics.setColor(255, 255, 255)
+  love.graphics.rectangle("fill", 0, 0, 2000, 2000)
+end
+
+function drawForground(l,t,w,h)
+  love.graphics.setColor(63, 255, 127)
+  love.graphics.circle("fill", circleTest:getX(), circleTest:getY(), circleTest:getRadius())
+  love.graphics.polygon("fill", rectangleTest:getPoints())
+  love.graphics.setColor(255, 255, 255)
+  love.graphics.draw(image, 64 - image:getWidth() * 0.5, 64 - image:getHeight() * 0.5)
+end
+

lib/body.lua

@@ -7,14 +7,13 @@ local body = class()
 body.glowShader     = love.graphics.newShader(_PACKAGE.."/shaders/glow.glsl")
 body.materialShader = love.graphics.newShader(_PACKAGE.."/shaders/material.glsl")
 
-function body:init(world, id, type, ...)
+function body:init(id, type, ...)
 	local args = {...}
 	self.id = id
 	self.type = type
 	self.normal = nil
 	self.material = nil
 	self.glow = nil
-  self.world = world
 
 	self.shine = true
 	self.red = 0
@@ -35,7 +34,6 @@ function body:init(world, id, type, ...)
 		self.ox = args[4] or 0
 		self.oy = args[5] or 0
 		self.shadowType = "circle"
-		world.isShadows = true
 	elseif self.type == "rectangle" then
 		self.x = args[1] or 0
 		self.y = args[2] or 0
@@ -54,11 +52,9 @@ function body:init(world, id, type, ...)
 			self.x - self.ox,
 			self.y - self.oy + self.height
 		}
-		world.isShadows = true
 	elseif self.type == "polygon" then
 		self.shadowType = "polygon"
 		self.data = args or {0, 0, 0, 0, 0, 0}
-		world.isShadows = true
 	elseif self.type == "image" then
 		self.img = args[1]
 		self.x = args[2] or 0
@@ -95,7 +91,6 @@ function body:init(world, id, type, ...)
 			self.y - self.oy + self.height
 		}
 		self.reflective = true
-		world.isShadows = true
 	elseif self.type == "refraction" then
 		self.normal = args[1]
 		self.x = args[2] or 0
@@ -122,7 +117,6 @@ function body:init(world, id, type, ...)
 		self.ox = self.width * 0.5
 		self.oy = self.height * 0.5
 		self.refraction = true
-		world.isRefraction = true
 	elseif self.type == "reflection" then
 		self.normal = args[1]
 		self.x = args[2] or 0
@@ -149,7 +143,6 @@ function body:init(world, id, type, ...)
 		self.ox = self.width * 0.5
 		self.oy = self.height * 0.5
 		self.reflection = true
-		world.isReflection = true
 	end
 end
 
@@ -173,7 +166,6 @@ function body:setPosition(x, y)
     self.x = x
     self.y = y
     self:refresh()
-    self.world.changed = true
   end
 end
 
@@ -182,7 +174,6 @@ function body:setX(x)
   if x ~= self.x then
     self.x = x
     self:refresh()
-    self.world.changed = true
   end
 end
 
@@ -191,7 +182,6 @@ function body:setY(y)
   if y ~= self.y then
     self.y = y
     self:refresh()
-    self.world.changed = true
   end
 end
 
@@ -230,7 +220,6 @@ function body:setDimension(width, height)
   self.width = width
   self.height = height
   self:refresh()
-  self.world.changed = true
 end
 
 -- set offset
@@ -241,7 +230,6 @@ function body:setOffset(ox, oy)
     if self.shadowType == "rectangle" then
       self:refresh()
     end
-    self.world.changed = true
   end
 end
 
@@ -251,7 +239,6 @@ function body:setImageOffset(ix, iy)
     self.ix = ix
     self.iy = iy
     self:refresh()
-    self.world.changed = true
   end
 end
 
@@ -261,7 +248,6 @@ function body:setNormalOffset(nx, ny)
     self.nx = nx
     self.ny = ny
     self:refresh()
-    self.world.changed = true
   end
 end
 
@@ -270,13 +256,11 @@ function body:setGlowColor(red, green, blue)
   self.glowRed = red
   self.glowGreen = green
   self.glowBlue = blue
-  self.world.changed = true
 end
 
 -- set glow alpha
 function body:setGlowStrength(strength)
   self.glowStrength = strength
-  self.world.changed = true
 end
 
 -- get radius
@@ -288,14 +272,12 @@ end
 function body:setRadius(radius)
   if radius ~= self.radius then
     self.radius = radius
-    self.world.changed = true
   end
 end
 
 -- set polygon data
 function body:setPoints(...)
   self.data = {...}
-  self.world.changed = true
 end
 
 -- get polygon data
@@ -306,13 +288,11 @@ end
 -- set shadow on/off
 function body:setShadow(b)
   self.castsNoShadow = not b
-  self.world.changed = true
 end
 
 -- set shine on/off
 function body:setShine(b)
   self.shine = b
-  self.world.changed = true
 end
 
 -- set glass color
@@ -320,13 +300,11 @@ function body:setColor(red, green, blue)
   self.red = red
   self.green = green
   self.blue = blue
-  self.world.changed = true
 end
 
 -- set glass alpha
 function body:setAlpha(alpha)
   self.alpha = alpha
-  self.world.changed = true
 end
 
 -- set reflection on/off
@@ -376,8 +354,6 @@ function body:setNormalMap(normal, width, height, nx, ny)
       {0.0, self.normalHeight, 0.0, self.normalHeight / self.normal:getHeight()}
     }
     self.normalMesh = love.graphics.newMesh(self.normalVert, self.normal, "fan")
-
-    self.world.isPixelShadows = true
   else
     self.normalMesh = nil
   end
@@ -475,8 +451,6 @@ end
 function body:setGlowMap(glow)
   self.glow = glow
   self.glowStrength = 1.0
-
-  self.world.isGlow = true
 end
 
 -- set tile offset
@@ -489,7 +463,6 @@ function body:setNormalTileOffset(tx, ty)
     {self.normalWidth, self.normalHeight, self.tileX + 1.0, self.tileY + 1.0},
     {0.0, self.normalHeight, self.tileX, self.tileY + 1.0}
   }
-  self.world.changed = true
 end
 
 -- get type

lib/light.lua

@@ -9,13 +9,10 @@ light.shader             = love.graphics.newShader(_PACKAGE.."/shaders/poly_shad
 light.normalShader       = love.graphics.newShader(_PACKAGE.."/shaders/normal.glsl")
 light.normalInvertShader = love.graphics.newShader(_PACKAGE.."/shaders/normal_invert.glsl")
 
-function light:init(world, x, y, r, g, b, range)
+function light:init(x, y, r, g, b, range)
-  self.world = world
 	self.direction = 0
 	self.angle = math.pi * 2.0
 	self.range = 0
-	self.shadow = love.graphics.newCanvas()
-	self.shine = love.graphics.newCanvas()
 	self.x = x or 0
 	self.y = y or 0
 	self.z = 15
@@ -27,6 +24,12 @@ function light:init(world, x, y, r, g, b, range)
 	self.glowSize = 0.1
 	self.glowStrength = 0.0
 	self.visible = true
+  self:refresh()
+end
+
+function light:refresh()
+	self.shadow = love.graphics.newCanvas()
+	self.shine  = love.graphics.newCanvas()
 end
 
 -- set position
@@ -63,6 +66,7 @@ function light:setY(y)
     self.y = y
   end
 end
+
 -- set color
 function light:setColor(red, green, blue)
   self.red = red
@@ -118,7 +122,7 @@ function light:setGlowStrength(strength)
   self.glowStrength = strength
 end
 
-function light:updateShadow(l,t,w,h)
+function light:updateShadow(l,t,w,h, bodies)
   love.graphics.setShader(self.shader)
   if self.x + self.range > l and self.x - self.range < (l+w) and self.y + self.range > t and self.y - self.range < (t+h) then
     local lightposrange = {self.x, h - self.y, self.range}
@@ -134,10 +138,10 @@ function light:updateShadow(l,t,w,h)
     love.graphics.clear()
 
     -- calculate shadows
-    local shadow_geometry = self:calculateShadows()
+    local shadow_geometry = self:calculateShadows(bodies)
 
     -- draw shadow
-    love.graphics.setInvertedStencil(stencils.shadow(shadow_geometry, self.world.body))
+    love.graphics.setInvertedStencil(stencils.shadow(shadow_geometry, bodies))
     love.graphics.setBlendMode("additive")
     love.graphics.rectangle("fill", l,t,w,h)
 
@@ -155,8 +159,8 @@ function light:updateShadow(l,t,w,h)
       end
     end
 
-    for k = 1, #self.world.body do
+    for k = 1, #bodies do
-      self.world.body[k]:drawShadow(self, l,t,w,h)
+      bodies[k]:drawShadow(self, l,t,w,h)
     end
 
     love.graphics.setShader(self.shader)
@@ -165,10 +169,9 @@ function light:updateShadow(l,t,w,h)
     love.graphics.setCanvas(self.shine)
     self.shine:clear(255, 255, 255)
     love.graphics.setBlendMode("alpha")
-    love.graphics.setStencil(stencils.poly(self.world.body))
+    love.graphics.setStencil(stencils.poly(bodies))
-    -- WHOA THIS MAY BE THE ISSUE HERE FIND THIS!
     love.graphics.rectangle("fill", l,t,w,h)
-
+    love.graphics.setStencil()
     self.visible = true
   else
     self.visible = false
@@ -178,6 +181,8 @@ end
 
 function light:drawShadow(l,t,w,h)
   if self.visible then
+    love.graphics.setColor(255, 255, 255)
+    love.graphics.setBlendMode("additive")
     love.graphics.draw(self.shadow, l, t)
   end
 end
@@ -189,16 +194,15 @@ function light:drawShine(l,t,w,h)
 end
 
 local shadowLength = 100000
-function light:calculateShadows()
+function light:calculateShadows(bodies)
 	local shadowGeometry = {}
-  local body = self.world.body
 
-	for i = 1, #body do
+	for i = 1, #bodies do
     local current
-		if body[i].shadowType == "rectangle" or body[i].shadowType == "polygon" then
+		if bodies[i].shadowType == "rectangle" or bodies[i].shadowType == "polygon" then
-      current = self:calculatePolyShadow(body[i])
+      current = self:calculatePolyShadow(bodies[i])
-		elseif body[i].shadowType == "circle" then
+		elseif bodies[i].shadowType == "circle" then
-      current = self:calculateCircleShadow(body[i])
+      current = self:calculateCircleShadow(bodies[i])
 		end
     if current ~= nil then
       shadowGeometry[#shadowGeometry + 1] = current
@@ -300,7 +304,7 @@ function light:calculateCircleShadow(circle)
   end
 end
 
-function light:drawPixelShadow(l,t,w,h)
+function light:drawPixelShadow(l,t,w,h, normalMap)
   if self.visible then
     if self.normalInvert then
       self.normalInvertShader:send('screenResolution', {w, h})
@@ -321,7 +325,7 @@ function light:drawPixelShadow(l,t,w,h)
       self.normalShader:send("lightDirection", self.direction)
       love.graphics.setShader(self.normalShader)
     end
-    love.graphics.draw(self.world.normalMap, l, t)
+    love.graphics.draw(normalMap, l, t)
   end
 end
 

lib/light_world.lua

@@ -34,81 +34,72 @@ light_world.blurh              = love.graphics.newShader(_PACKAGE.."/shaders/blu
 light_world.refractionShader   = love.graphics.newShader(_PACKAGE.."/shaders/refraction.glsl")
 light_world.reflectionShader   = love.graphics.newShader(_PACKAGE.."/shaders/reflection.glsl")
 
-light_world.blurv:send("screen",            {love.window.getWidth(), love.window.getHeight()})
+function light_world:init(options)
-light_world.blurh:send("screen",            {love.window.getWidth(), love.window.getHeight()})
-light_world.refractionShader:send("screen", {love.window.getWidth(), love.window.getHeight()})
-light_world.reflectionShader:send("screen", {love.window.getWidth(), love.window.getHeight()})
-
-function light_world:init()
-  self.last_buffer = nil
-
 	self.lights = {}
 	self.body = {}
 
 	self.ambient              = {0, 0, 0}
 	self.normalInvert         = false
-	self.glowBlur             = 1.0
+
-	self.glowTimer            = 0.0
-	self.glowDown             = false
 	self.refractionStrength   = 8.0
 	self.reflectionStrength   = 16.0
 	self.reflectionVisibility = 1.0
+
 	self.blur                 = 2.0
+	self.glowBlur             = 1.0
+	self.glowTimer            = 0.0
+	self.glowDown             = false
+
+  self.drawBackground       = function() end
+  self.drawForground        = function() end
+
+  options = options or {}
+  for k, v in pairs(options) do self[k] = v end
 
   self:refreshScreenSize()
 end
 
-function light_world:update(l,t,w,h)
+function light_world:drawBlur(blendmode, blur, canvas, canvas2, l, t, w, h)
-  l,t,w,h = self.clampScreen(l,t,w,h)
+  if blur <= 0 then
-  self:updateShadows(l,t,w,h)
+    return
-  self:updateShine(l,t,w,h)
+  end
-  self:updatePixelShadows(l,t,w,h)
+
-  self:updateGlow(l,t,w,h)
+  love.graphics.setColor(255, 255, 255)
-  self:updateRefraction(l,t,w,h)
+  self.blurv:send("steps", blur)
-  self:updateRelfection(l,t,w,h)
+  self.blurh:send("steps", blur)
+  love.graphics.setBlendMode(blendmode)
+  canvas2:clear()
+  love.graphics.setCanvas(canvas2)
+  love.graphics.setShader(self.blurv)
+  love.graphics.draw(canvas, l, t)
+  love.graphics.setCanvas(canvas)
+  love.graphics.setShader(self.blurh)
+  love.graphics.draw(canvas2, l, t)
 end
 
 function light_world:updateShadows(l,t,w,h)
-  if not self.isShadows and not self.isLight then
+  local last_buffer = love.graphics.getCanvas()
-    return
-  end
-  self.last_buffer = love.graphics.getCanvas()
 
   for i = 1, #self.lights do
-    self.lights[i]:updateShadow(l,t,w,h)
+    self.lights[i]:updateShadow(l,t,w,h, self.body)
   end
 
   -- update shadow
   love.graphics.setCanvas(self.shadow)
-  love.graphics.setStencil()
   love.graphics.setColor(unpack(self.ambient))
   love.graphics.setBlendMode("alpha")
   love.graphics.rectangle("fill", l, t, w, h)
-  love.graphics.setColor(255, 255, 255)
-  love.graphics.setBlendMode("additive")
 
   for i = 1, #self.lights do
     self.lights[i]:drawShadow(l,t,w,h)
   end
 
-  if self.blur then
+  light_world:drawBlur("alpha", self.blur, self.shadow, self.shadow2, l, t, w, h)
-    love.graphics.setColor(255, 255, 255)
+  love.graphics.setCanvas(last_buffer)
-    self.blurv:send("steps", self.blur)
-    self.blurh:send("steps", self.blur)
-    love.graphics.setBlendMode("alpha")
-    love.graphics.setCanvas(self.shadow2)
-    love.graphics.setShader(self.blurv)
-    love.graphics.draw(self.shadow, l, t)
-    love.graphics.setCanvas(self.shadow)
-    love.graphics.setShader(self.blurh)
-    love.graphics.draw(self.shadow2, l, t)
-  end
-
-  love.graphics.setCanvas(self.last_buffer)
 end
 
 function light_world:updateShine(l,t,w,h)
-  self.last_buffer = love.graphics.getCanvas()
+  local last_buffer = love.graphics.getCanvas()
   -- update shine
   love.graphics.setCanvas(self.shine)
   love.graphics.setColor(unpack(self.ambient))
@@ -121,28 +112,12 @@ function light_world:updateShine(l,t,w,h)
     self.lights[i]:drawShine(l,t,w,h)
   end
 
-  if self.blur and false then
+  --light_world:drawBlur("additive", self.blur, self.shine, self.shine2, l, t, w, h)
-    love.graphics.setColor(255, 255, 255)
+  love.graphics.setCanvas(last_buffer)
-    self.blurv:send("steps", self.blur)
-    self.blurh:send("steps", self.blur)
-    love.graphics.setBlendMode("alpha")
-    love.graphics.setCanvas(self.shine2)
-    love.graphics.setShader(self.blurv)
-    love.graphics.draw(self.shine, l, t)
-    love.graphics.setCanvas(self.shine)
-    love.graphics.setShader(self.blurh)
-    love.graphics.draw(self.shine2, l, t)
-  end
-
-  love.graphics.setCanvas(self.last_buffer)
 end
 
 function light_world:updatePixelShadows(l,t,w,h)
-  if not self.isPixelShadows then
+  local last_buffer = love.graphics.getCanvas()
-    return
-  end
-
-  self.last_buffer = love.graphics.getCanvas()
   -- update pixel shadow
   love.graphics.setBlendMode("alpha")
 
@@ -150,19 +125,20 @@ function light_world:updatePixelShadows(l,t,w,h)
   self.normalMap:clear()
   love.graphics.setShader()
   love.graphics.setCanvas(self.normalMap)
+
   for i = 1, #self.body do
     self.body[i]:drawPixelShadow(l,t,w,h)
   end
+
   love.graphics.setColor(255, 255, 255)
   love.graphics.setBlendMode("alpha")
-
   self.pixelShadow2:clear()
   love.graphics.setCanvas(self.pixelShadow2)
   love.graphics.setBlendMode("additive")
   love.graphics.setShader(self.shader2)
 
   for i = 1, #self.lights do
-    self.lights[i]:drawPixelShadow(l,t,w,h)
+    self.lights[i]:drawPixelShadow(l,t,w,h, self.normalMap)
   end
 
   love.graphics.setShader()
@@ -175,15 +151,11 @@ function light_world:updatePixelShadows(l,t,w,h)
   love.graphics.rectangle("fill", l,t,w,h)
   love.graphics.setBlendMode("alpha")
 
-  love.graphics.setCanvas(self.last_buffer)
+  love.graphics.setCanvas(last_buffer)
 end
 
 function light_world:updateGlow(l,t,w,h)
-  if not self.isGlow then
+  local last_buffer = love.graphics.getCanvas()
-    return
-  end
-
-  self.last_buffer = love.graphics.getCanvas()
   -- create glow map
   self.glowMap:clear(0, 0, 0)
   love.graphics.setCanvas(self.glowMap)
@@ -204,30 +176,12 @@ function light_world:updateGlow(l,t,w,h)
     self.body[i]:drawGlow(l,t,w,h)
   end
 
-  love.graphics.setColor(255, 255, 255)
+  light_world:drawBlur("alpha", self.glowBlur, self.glowMap, self.glowMap2, l, t, w, h)
-  if self.glowBlur == 0.0 then
+  love.graphics.setCanvas(last_buffer)
-    self.blurv:send("steps", self.glowBlur)
-    self.blurh:send("steps", self.glowBlur)
-    love.graphics.setBlendMode("additive")
-    self.glowMap2:clear()
-    love.graphics.setCanvas(self.glowMap2)
-    love.graphics.setShader(self.blurv)
-    love.graphics.draw(self.glowMap, l, t)
-    love.graphics.setCanvas(self.glowMap)
-    love.graphics.setShader(self.blurh)
-    love.graphics.draw(self.glowMap2, l, t)
-    love.graphics.setBlendMode("alpha")
-  end
-
-  love.graphics.setCanvas(self.last_buffer)
 end
 
 function light_world:updateRefraction(l,t,w,h)
-  if not self.isRefraction then
+  local last_buffer = love.graphics.getCanvas()
-    return
-  end
-
-  self.last_buffer = love.graphics.getCanvas()
 
   -- create refraction map
   self.refractionMap:clear()
@@ -236,24 +190,20 @@ function light_world:updateRefraction(l,t,w,h)
     self.body[i]:drawRefraction(l,t,w,h)
   end
 
-  if self.last_buffer then
+  if last_buffer then
     love.graphics.setColor(255, 255, 255)
     love.graphics.setBlendMode("alpha")
     love.graphics.setCanvas(self.refractionMap2)
-    love.graphics.draw(self.last_buffer, l, t)
+    love.graphics.draw(last_buffer, l, t)
-    love.graphics.setCanvas(self.last_buffer)
+    love.graphics.setCanvas(last_buffer)
     love.graphics.setShader()
   end
 
-  love.graphics.setCanvas(self.last_buffer)
+  love.graphics.setCanvas(last_buffer)
 end
 
 function light_world:updateRelfection(l,t,w,h)
-  if not self.isReflection then
+  local last_buffer = love.graphics.getCanvas()
-    return
-  end
-
-  self.last_buffer = love.graphics.getCanvas()
   -- create reflection map
   self.reflectionMap:clear(0, 0, 0)
   love.graphics.setCanvas(self.reflectionMap)
@@ -261,18 +211,19 @@ function light_world:updateRelfection(l,t,w,h)
     self.body[i]:drawReflection(l,t,w,h)
   end
 
-  if self.last_buffer then
+  if last_buffer then
     love.graphics.setColor(255, 255, 255)
     love.graphics.setBlendMode("alpha")
     love.graphics.setCanvas(self.reflectionMap2)
-    love.graphics.draw(self.last_buffer, l, t)
+    love.graphics.draw(last_buffer, l, t)
     love.graphics.setShader()
   end
 
-  love.graphics.setCanvas(self.last_buffer)
+  love.graphics.setCanvas(last_buffer)
 end
 
 function light_world:refreshScreenSize()
+	self.render_buffer    = love.graphics.newCanvas()
 	self.shadow           = love.graphics.newCanvas()
 	self.shadow2          = love.graphics.newCanvas()
 	self.pixelShadow      = love.graphics.newCanvas()
@@ -286,20 +237,45 @@ function light_world:refreshScreenSize()
 	self.refractionMap2   = love.graphics.newCanvas()
 	self.reflectionMap    = love.graphics.newCanvas()
 	self.reflectionMap2   = love.graphics.newCanvas()
+
+  self.blurv:send("screen",            {love.window.getWidth(), love.window.getHeight()})
+  self.blurh:send("screen",            {love.window.getWidth(), love.window.getHeight()})
+  self.refractionShader:send("screen", {love.window.getWidth(), love.window.getHeight()})
+  self.reflectionShader:send("screen", {love.window.getWidth(), love.window.getHeight()})
+
+  for i = 1, #self.lights do
+    self.lights[i]:refresh()
+  end
 end
 
-function light_world.clampScreen(l,t,w,h)
+function light_world:draw(l,t,w,h,s)
-  return (l or 0), (t or 0), (w or love.graphics.getWidth()), (h or love.graphics.getHeight())
+  l,t,w,h,s = (l or 0), (t or 0), (w or love.graphics.getWidth()), (h or love.graphics.getHeight()), s or 1 
+
+  local last_buffer = love.graphics.getCanvas()
+
+	love.graphics.setCanvas(self.render_buffer)
+  self.drawBackground(l,t,w,h,s)
+  self:drawShadow(l,t,w,h,scale)
+  self.drawForground(l,t,w,h,s)
+  self:drawShine(l,t,w,h,scale)
+  self:drawPixelShadow(l,t,w,h,scale)
+  self:drawGlow(l,t,w,h,scale)
+  self:drawRefraction(l,t,w,h,scale)
+  self:drawReflection(l,t,w,h,scale)
+  love.graphics.setBackgroundColor(0, 0, 0)
+  love.graphics.setBlendMode("alpha")
+  love.graphics.setCanvas(last_buffer)
+  love.graphics.setShader()
+  love.graphics.setColor(255, 255, 255)
+  love.graphics.draw(self.render_buffer)
 end
 
 -- draw shadow
-function light_world:drawShadow(l,t,w,h)
+function light_world:drawShadow(l,t,w,h,s)
   if not self.isShadows and not self.isLight then
     return
   end
-
+  self:updateShadows(l,t,w,h)
-  l,t,w,h = self.clampScreen(l,t,w,h)
-
   love.graphics.setColor(255, 255, 255)
   love.graphics.setBlendMode("multiplicative")
   love.graphics.setShader()
@@ -308,13 +284,11 @@ function light_world:drawShadow(l,t,w,h)
 end
 
 -- draw shine
-function light_world:drawShine(l,t,w,h)
+function light_world:drawShine(l,t,w,h,s)
   if not self.isShadows then
     return
   end
-
+  self:updateShine(l,t,w,h)
-  l,t,w,h = self.clampScreen(l,t,w,h)
-
   love.graphics.setColor(255, 255, 255)
   love.graphics.setBlendMode("multiplicative")
   love.graphics.setShader()
@@ -323,13 +297,11 @@ function light_world:drawShine(l,t,w,h)
 end
 
 -- draw pixel shadow
-function light_world:drawPixelShadow(l,t,w,h)
+function light_world:drawPixelShadow(l,t,w,h,s)
-  if not self.isPixelShadows then
+  if not self.isShadows then
     return 
   end
-
+  self:updatePixelShadows(l,t,w,h)
-  l,t,w,h = self.clampScreen(l,t,w,h)
-
   love.graphics.setColor(255, 255, 255)
   love.graphics.setBlendMode("multiplicative")
   love.graphics.setShader()
@@ -338,22 +310,18 @@ function light_world:drawPixelShadow(l,t,w,h)
 end
 
 -- draw material
-function light_world:drawMaterial(l,t,w,h)
+function light_world:drawMaterial(l,t,w,h,s)
-  l,t,w,h = self.clampScreen(l,t,w,h)
-
   for i = 1, #self.body do
     self.body[i]:drawMaterial(l,t,w,h)
   end
 end
 
 -- draw glow
-function light_world:drawGlow(l,t,w,h)
+function light_world:drawGlow(l,t,w,h,s)
-  if not self.isGlow then
+  if not self.isShadows then
     return
   end
-
+  self:updateGlow(l,t,w,h)
-  l,t,w,h = self.clampScreen(l,t,w,h)
-
   love.graphics.setColor(255, 255, 255)
   love.graphics.setBlendMode("additive")
   love.graphics.setShader()
@@ -361,13 +329,11 @@ function light_world:drawGlow(l,t,w,h)
   love.graphics.setBlendMode("alpha")
 end
 -- draw refraction
-function light_world:drawRefraction(l,t,w,h)
+function light_world:drawRefraction(l,t,w,h,s)
   if not self.isRefraction then
     return
   end
-
+  self:updateRefraction(l,t,w,h)
-  l,t,w,h = self.clampScreen(l,t,w,h)
-
   self.refractionShader:send("backBuffer", self.refractionMap2)
   self.refractionShader:send("refractionStrength", self.refractionStrength)
   love.graphics.setShader(self.refractionShader)
@@ -376,13 +342,11 @@ function light_world:drawRefraction(l,t,w,h)
 end
 
 -- draw reflection
-function light_world:drawReflection(l,t,w,h)
+function light_world:drawReflection(l,t,w,h,s)
   if not self.isReflection then
     return
   end
-
+  self:updateRelfection(l,t,w,h)
-  l,t,w,h = self.clampScreen(l,t,w,h)
-
   self.reflectionShader:send("backBuffer", self.reflectionMap2)
   self.reflectionShader:send("reflectionStrength", self.reflectionStrength)
   self.reflectionShader:send("reflectionVisibility", self.reflectionVisibility)
@@ -393,7 +357,7 @@ end
 
 -- new light
 function light_world:newLight(x, y, red, green, blue, range)
-  self.lights[#self.lights + 1] = Light(self, x, y, red, green, blue, range)
+  self.lights[#self.lights + 1] = Light(x, y, red, green, blue, range)
   self.isLight = true
   return self.lights[#self.lights]
 end
@@ -408,12 +372,18 @@ end
 function light_world:clearBodys()
   self.body = {}
   self.isShadows = false
-  self.isPixelShadows = false
-  self.isGlow = false
   self.isRefraction = false
   self.isReflection = false
 end
 
+function light_world:setBackgroundMethod(fn)
+  self.drawBackground = fn or function() end
+end
+
+function light_world:setForegroundMethod(fn)
+  self.drawForground = fn or function() end
+end
+
 -- set ambient color
 function light_world:setAmbientColor(red, green, blue)
   self.ambient = {red, green, blue}
@@ -449,19 +419,6 @@ function light_world:setShadowBlur(blur)
   self.blur = blur
 end
 
--- set buffer
-function light_world:setBuffer(buffer)
-  if buffer == "render" then
-    love.graphics.setCanvas(self.last_buffer)
-  else
-    self.last_buffer = love.graphics.getCanvas()
-  end
-
-  if buffer == "glow" then
-    love.graphics.setCanvas(self.glowMap)
-  end
-end
-
 -- set glow blur
 function light_world:setGlowStrength(strength)
   self.glowBlur = strength
@@ -484,50 +441,58 @@ end
 
 -- new rectangle
 function light_world:newRectangle(x, y, w, h)
+  self.isShadows = true
   return self:newBody("rectangle", x, y, width, height)
 end
 
 -- new circle
 function light_world:newCircle(x, y, r)
-  return self:newBody("circle", x, y, radius)
+  self.isShadows = true
+  return self:newBody("circle", x, y, r)
 end
 
 -- new polygon
 function light_world:newPolygon(...)
+  self.isShadows = true
   return self:newBody("polygon", ...)
 end
 
 -- new image
 function light_world:newImage(img, x, y, width, height, ox, oy)
+  self.isShadows = true
   return self:newBody("image", img, x, y, width, height, ox, oy)
 end
 
 -- new refraction
 function light_world:newRefraction(normal, x, y, width, height)
+  self.isRefraction = true
   return self:newBody("refraction", normal, x, y, width, height)
 end
 
 -- new refraction from height map
 function light_world:newRefractionHeightMap(heightMap, x, y, strength)
   local normal = height_map_conv.toNormalMap(heightMap, strength)
+  self.isRefraction = true
   return self.newRefraction(p, normal, x, y)
 end
 
 -- new reflection
 function light_world:newReflection(normal, x, y, width, height)
+  self.isReflection = true
   return self:newBody("reflection", normal, x, y, width, height)
 end
 
 -- new reflection from height map
 function light_world:newReflectionHeightMap(heightMap, x, y, strength)
   local normal = height_map_conv.toNormalMap(heightMap, strength)
+  self.isReflection = true
   return self.newReflection(p, normal, x, y)
 end
 
 -- new body
 function light_world:newBody(type, ...)
   local id = #self.body + 1
-  self.body[id] = Body(self, id, type, ...)
+  self.body[id] = Body(id, type, ...)
   return self.body[#self.body]
 end
 

main.lua

@@ -58,25 +58,28 @@ function exf.update(dt)
 end
 
 function exf.draw()
-    love.graphics.setBackgroundColor(0, 0, 0)
+	lightWorld:draw(0, 0, love.window.getWidth(), love.window.getHeight(), 1)
+end
 
-	love.graphics.setColor(48, 156, 225)
+function exf.drawBackground()
-	love.graphics.rectangle("fill", 0, 0, love.window.getWidth(), love.window.getHeight())
+  love.graphics.setBackgroundColor(0, 0, 0)
 
-    love.graphics.setColor(255, 255, 255, 191)
+  love.graphics.setColor(48, 156, 225)
-    love.graphics.setFont(exf.bigfont)
+  love.graphics.rectangle("fill", 0, 0, love.window.getWidth(), love.window.getHeight())
-    love.graphics.print("Examples:", 50, 50)
 
-    love.graphics.setFont(exf.smallfont)
+  love.graphics.setColor(255, 255, 255, 191)
-    love.graphics.print("Browse and click on the example you \nwant to run. To return the the example \nselection screen, press escape.", 500, 80)
+  love.graphics.setFont(exf.bigfont)
+  love.graphics.print("Examples:", 50, 50)
 
-    exf.list:draw()
+  love.graphics.setFont(exf.smallfont)
+  love.graphics.print("Browse and click on the example you \nwant to run. To return the the example \nselection screen, press escape.", 500, 80)
 
-    lightWorld:update()
+  exf.list:draw()
-	lightWorld:drawShadow()
+end
 
-	love.graphics.setColor(255, 255, 255)
+function exf.drawForground()
-    love.graphics.draw(exf.bigball, 800 - 128, 600 - 128, love.timer.getTime(), 1, 1, exf.bigball:getWidth() * 0.5, exf.bigball:getHeight() * 0.5)
+  love.graphics.setColor(255, 255, 255)
+  love.graphics.draw(exf.bigball, 800 - 128, 600 - 128, love.timer.getTime(), 1, 1, exf.bigball:getWidth() * 0.5, exf.bigball:getHeight() * 0.5)
 end
 
 function exf.keypressed(k)
@@ -179,7 +182,10 @@ function exf.resume()
     love.window.setTitle("LOVE Example Browser")
 
 	-- create light world
-	lightWorld = LightWorld()
+	lightWorld = LightWorld({
+    drawBackground = exf.drawBackground,
+    drawForground = exf.drawForground
+  })
 	lightWorld:setAmbientColor(127, 127, 127)
 
 	-- create light
@@ -187,7 +193,7 @@ function exf.resume()
 	lightMouse:setSmooth(2)
 
 	-- create shadow bodys
-	circleTest = lightWorld:newCircle(800 - 128, 600 - 128, 46)
+	circleTest = lightWorld:newCircle(800 - 128, 600 - 128, exf.bigball:getWidth()*0.5)
 end
 
 function inside(mx, my, x, y, w, h)