Add several post shader effects.

light.lua

@@ -87,7 +87,7 @@ function love.light.newWorld()
 					local lightposrange = {o.lights[i].x, love.graphics.getHeight() - o.lights[i].y, o.lights[i].range}
 					LOVE_LIGHT_CURRENT = o.lights[i]
 					LOVE_LIGHT_DIRECTION = LOVE_LIGHT_DIRECTION + 0.002
-					o.shader:send("lightPosition", {o.lights[i].x - LOVE_LIGHT_TRANSLATE_X, love.graphics.getHeight() - (o.lights[i].y - LOVE_LIGHT_TRANSLATE_Y)})
+					o.shader:send("lightPosition", {o.lights[i].x - LOVE_LIGHT_TRANSLATE_X, love.graphics.getHeight() - (o.lights[i].y - LOVE_LIGHT_TRANSLATE_Y), o.lights[i].z})
 					o.shader:send("lightRange", o.lights[i].range)
 					o.shader:send("lightColor", {o.lights[i].red / 255.0, o.lights[i].green / 255.0, o.lights[i].blue / 255.0})
 					o.shader:send("lightSmooth", o.lights[i].smooth)
@@ -316,8 +316,7 @@ function love.light.newWorld()
 			end
 		end
 		
-		love.graphics.setBlendMode("replace")
+		love.graphics.setColor(0, 0, 0)
-		love.graphics.setColor(0, 0, 0, 0)
 		for i = 1, #o.body do
 			if not o.body[i].refractive then
 				if o.body[i].type == "circle" then
@@ -333,7 +332,6 @@ function love.light.newWorld()
 		end
 
 		-- create reflection map
-		love.graphics.setBlendMode("alpha")
 		if o.changed then
 			o.reflectionMap:clear(0, 0, 0)
 			love.graphics.setCanvas(o.reflectionMap)
@@ -615,8 +613,8 @@ function love.light.newWorld()
 		end
 	end
 	-- set light position
-	o.setLightPosition = function(n, x, y)
+	o.setLightPosition = function(n, x, y, z)
-		o.lights[n].setPosition(x, y)
+		o.lights[n].setPosition(x, y, z)
 	end
 	-- set light x
 	o.setLightX = function(n, x)
@@ -675,10 +673,12 @@ function love.light.newLight(p, x, y, red, green, blue, range)
 	o.changed = true
 	o.visible = true
 	-- set position
-	o.setPosition = function(x, y)
+	o.setPosition = function(x, y, z)
-		if x ~= o.x or y ~= o.y then
+		o.z = z or o.z
+		if x ~= o.x or y ~= o.y or z ~= o.z then
 			o.x = x
 			o.y = y
+			o.z = z
 			o.changed = true
 		end
 	end

main.lua

@@ -75,6 +75,7 @@ function love.load()
 	ape = love.graphics.newImage("gfx/ape.png")
 	ape_normal = love.graphics.newImage("gfx/ape_normal.png")
 	ape_glow = love.graphics.newImage("gfx/ape_glow.png")
+	imgLight = love.graphics.newImage("gfx/light.png")
 
 	-- materials
 	material = {}
@@ -110,6 +111,7 @@ function love.load()
 	textureOn = true
 	normalOn = false
 	glowBlur = 1.0
+	effectOn = 0.0
 
 	offsetX = 0.0
 	offsetY = 0.0
@@ -123,7 +125,7 @@ end
 
 function love.update(dt)
 	love.window.setTitle("Light vs. Shadow Engine (FPS:" .. love.timer.getFPS() .. ")")
-	mouseLight.setPosition(love.mouse.getX(), love.mouse.getY())
+	mouseLight.setPosition(love.mouse.getX(), love.mouse.getY(), 16.0 + (math.sin(lightDirection) + 1.0) * 64.0)
 	mx = love.mouse.getX()
 	my = love.mouse.getY()
 	lightDirection = lightDirection + dt
@@ -282,19 +284,21 @@ function love.draw()
 
 	love.graphics.setBlendMode("alpha")
 	for i = 1, phyCnt do
-		if phyLight[i].getType() == "image" and not phyLight[i].material then
+		if phyLight[i].getType() == "image" then
-			if not normalOn 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)
-			elseif 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)
 			end
 		end
 	end
 
-	lightWorld.drawMaterial()
+	if not normalOn then
+		lightWorld.drawMaterial()
+	end
 
 	-- draw pixel shadow
 	if lightOn and not normalOn then
@@ -312,6 +316,8 @@ function love.draw()
 	-- draw refraction
 	lightWorld.drawRefraction()
 
+	love.graphics.draw(imgLight, mx - 5, (my - 5) - (16.0 + (math.sin(lightDirection) + 1.0) * 64.0))
+
 	-- draw help
 	if helpOn then
 		love.graphics.setBlendMode("alpha")
@@ -377,6 +383,13 @@ function love.draw()
 			love.graphics.setColor(255, 0, 0)
 			love.graphics.print("F9: Glow Blur (off)", 4 + 152 * 3, 4 + 20 * 1)
 		end
+		if effectOn >= 1.0 then
+			love.graphics.setColor(0, 255, 0)
+			love.graphics.print("F10: Effects (" .. effectOn .. ")", 4 + 152 * 4, 4 + 20 * 1)
+		else
+			love.graphics.setColor(255, 0, 0)
+			love.graphics.print("F10: Effects (off)", 4 + 152 * 4, 4 + 20 * 1)
+		end
 		love.graphics.setColor(255, 0, 255)
 		love.graphics.print("F11: Clear obj.", 4 + 152 * 4, 4 + 20 * 2)
 		love.graphics.print("F12: Clear lights", 4 + 152 * 4, 4 + 20 * 3)
@@ -407,6 +420,17 @@ function love.draw()
 		love.postshader.addEffect("bloom", 2.0, bloomOn)
 	end
 
+	if effectOn == 1.0 then
+		love.postshader.addEffect("4colors", {15, 56, 15}, {48, 98, 48}, {139, 172, 15}, {155, 188, 15})
+		--love.postshader.addEffect("4colors", {108, 108, 78}, {142, 139, 87}, {195, 196, 165}, {227, 230, 201})
+	elseif effectOn == 2.0 then
+		love.postshader.addEffect("monochrom")
+	elseif effectOn == 3.0 then
+		love.postshader.addEffect("scanlines")
+	elseif effectOn == 4.0 then
+		love.postshader.addEffect("tiltshift", 4.0)
+	end
+
 	love.postshader.draw()
 end
 
@@ -427,6 +451,7 @@ function love.mousepressed(x, y, c)
 		light.setGlowStrength(0.3)
 	elseif c == "l" then
 		-- add rectangle
+		math.randomseed(love.timer.getTime())
 		phyCnt = phyCnt + 1
 		phyLight[phyCnt] = lightWorld.newPolygon()
 		phyBody[phyCnt] = love.physics.newBody(physicWorld, x, y, "dynamic")
@@ -435,6 +460,7 @@ function love.mousepressed(x, y, c)
 		phyFixture[phyCnt]:setRestitution(0.5)
 	elseif c == "r" then
 		-- add circle
+		math.randomseed(love.timer.getTime())
 		cRadius = math.random(8, 32)
 		phyCnt = phyCnt + 1
 		phyLight[phyCnt] = lightWorld.newCircle(x, y, cRadius)
@@ -487,6 +513,11 @@ function love.keypressed(k, u)
 			glowBlur = 0.0
 		end
 		lightWorld.setGlowStrength(glowBlur)
+	elseif k == "f10" then
+		effectOn = effectOn + 1.0
+		if effectOn > 4.0 then
+			effectOn = 0.0
+		end
 	elseif k == "f11" then
 		physicWorld:destroy()
 		lightWorld.clearBodys()

postshader.lua

@@ -6,9 +6,14 @@ LOVE_POSTSHADER_BLURV = love.graphics.newShader("shader/blurv.glsl")
 LOVE_POSTSHADER_BLURH = love.graphics.newShader("shader/blurh.glsl")
 LOVE_POSTSHADER_CONTRAST = love.graphics.newShader("shader/contrast.glsl")
 LOVE_POSTSHADER_CHROMATIC_ABERRATION = love.graphics.newShader("shader/chromatic_aberration.glsl")
+LOVE_POSTSHADER_FOUR_COLOR = love.graphics.newShader("shader/four_colors.glsl")
+LOVE_POSTSHADER_MONOCHROM = love.graphics.newShader("shader/monochrom.glsl")
+LOVE_POSTSHADER_SCANLINES = love.graphics.newShader("shader/scanlines.glsl")
+LOVE_POSTSHADER_TILT_SHIFT = love.graphics.newShader("shader/tilt_shift.glsl")
 
 LOVE_POSTSHADER_BLURV:send("screen", {love.window.getWidth(), love.window.getHeight()})
 LOVE_POSTSHADER_BLURH:send("screen", {love.window.getWidth(), love.window.getHeight()})
+LOVE_POSTSHADER_SCANLINES:send("screenHeight", {love.window.getWidth(), love.window.getHeight()})
 
 love.postshader = {}
 
@@ -25,12 +30,13 @@ love.postshader.addEffect = function(shader, ...)
 	args = {...}
 	LOVE_POSTSHADER_LAST_BUFFER = love.graphics.getCanvas()
 
+	love.graphics.setCanvas(LOVE_POSTSHADER_BUFFER_BACK)
+	love.graphics.setBlendMode("alpha")
+
 	if shader == "bloom" then
 		-- Bloom Shader
 		LOVE_POSTSHADER_BLURV:send("steps", args[1] or 2.0)
 		LOVE_POSTSHADER_BLURH:send("steps", args[1] or 2.0)
-		love.graphics.setCanvas(LOVE_POSTSHADER_BUFFER_BACK)
-		love.graphics.setBlendMode("alpha")
 
 		love.graphics.setShader(LOVE_POSTSHADER_BLURV)
 		love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
@@ -53,8 +59,44 @@ love.postshader.addEffect = function(shader, ...)
 		-- Blur Shader
 		LOVE_POSTSHADER_BLURV:send("steps", args[1] or 2.0)
 		LOVE_POSTSHADER_BLURH:send("steps", args[2] or 2.0)
+
+		love.graphics.setShader(LOVE_POSTSHADER_BLURV)
+		love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
+
+		love.graphics.setShader(LOVE_POSTSHADER_BLURH)
+		love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
+	elseif shader == "chromatic" then
+		-- Chromatic Shader
+		LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("redStrength", {args[1] or 0.0, args[2] or 0.0})
+		LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("greenStrength", {args[3] or 0.0, args[4] or 0.0})
+		LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("blueStrength", {args[5] or 0.0, args[6] or 0.0})
 		love.graphics.setCanvas(LOVE_POSTSHADER_BUFFER_BACK)
-		love.graphics.setBlendMode("alpha")
+		love.graphics.setShader(LOVE_POSTSHADER_CHROMATIC_ABERRATION)
+		love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
+	elseif shader == "4colors" then
+		-- 4 Color Shader
+		for i = 1, 4 do
+			for k = 1, 3 do
+				args[i][k] = args[i][k] / 255.0
+			end
+		end
+		LOVE_POSTSHADER_FOUR_COLOR:send("palette", args[1], args[2], args[3], args[4])
+		love.graphics.setShader(LOVE_POSTSHADER_FOUR_COLOR)
+		love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
+	elseif shader == "monochrom" then
+		-- Monochrom Shader
+		LOVE_POSTSHADER_MONOCHROM:send("time", love.timer.getTime())
+		love.graphics.setShader(LOVE_POSTSHADER_MONOCHROM)
+		love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
+	elseif shader == "scanlines" then
+		-- Scanlines Shader
+		LOVE_POSTSHADER_SCANLINES:send("time", love.timer.getTime())
+		love.graphics.setShader(LOVE_POSTSHADER_SCANLINES)
+		love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
+	elseif shader == "tiltshift" then
+		-- Blur Shader
+		LOVE_POSTSHADER_BLURV:send("steps", args[1] or 2.0)
+		LOVE_POSTSHADER_BLURH:send("steps", args[1] or 2.0)
 
 		love.graphics.setShader(LOVE_POSTSHADER_BLURV)
 		love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
@@ -62,21 +104,13 @@ love.postshader.addEffect = function(shader, ...)
 		love.graphics.setShader(LOVE_POSTSHADER_BLURH)
 		love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
 
-		love.graphics.setCanvas(LOVE_POSTSHADER_LAST_BUFFER)
+		LOVE_POSTSHADER_TILT_SHIFT:send("buffer", LOVE_POSTSHADER_BUFFER_RENDER)
-		love.graphics.setShader()
+		love.graphics.setShader(LOVE_POSTSHADER_TILT_SHIFT)
-		love.graphics.setColor(255, 255, 255)
 		love.graphics.draw(LOVE_POSTSHADER_BUFFER_BACK)
-	elseif shader == "chromatic" then
+	end
-		-- Blur Shader
+
-		LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("redStrength", {args[1] or 0.0, args[2] or 0.0})
+	if shader ~= "bloom" then
-		LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("greenStrength", {args[3] or 0.0, args[4] or 0.0})
-		LOVE_POSTSHADER_CHROMATIC_ABERRATION:send("blueStrength", {args[5] or 0.0, args[6] or 0.0})
-		love.graphics.setCanvas(LOVE_POSTSHADER_BUFFER_BACK)
 		love.graphics.setBlendMode("alpha")
-
-		love.graphics.setShader(LOVE_POSTSHADER_CHROMATIC_ABERRATION)
-		love.graphics.draw(LOVE_POSTSHADER_BUFFER_RENDER)
-
 		love.graphics.setCanvas(LOVE_POSTSHADER_LAST_BUFFER)
 		love.graphics.setShader()
 		love.graphics.setColor(255, 255, 255)

shader/four_colors.glsl

@@ -0,0 +1,8 @@
+extern vec3 palette[4];
+
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords){
+	vec4 pixel = Texel(texture, texture_coords);
+	int index = int(min(0.9999, max(0.0001,(pixel.r + pixel.g + pixel.b) / 3.0)) * 4);
+
+	return vec4(palette[index], 1.0);
+}

shader/monochrom.glsl

@@ -0,0 +1,11 @@
+extern float time = 0.0;
+
+float rand(vec2 position, float seed) {
+   return fract(sin(dot(position.xy,vec2(12.9898, 78.233))) * seed);
+}
+
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords){
+	vec4 pixel = Texel(texture, texture_coords);
+
+	return vec4(vec3((pixel.r + pixel.g + pixel.b) / 3.0) + (rand(texture_coords, time) - 0.5) * 0.1, 1.0);
+}

shader/poly_shadow.glsl

@@ -1,6 +1,6 @@
 #define PI 3.1415926535897932384626433832795
 
-extern vec2 lightPosition;
+extern vec3 lightPosition;
 extern vec3 lightColor;
 extern float lightRange;
 extern float lightSmooth;
@@ -10,7 +10,7 @@ extern float lightAngle;
 
 vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords){
 	vec4 pixel = Texel(texture, texture_coords);
-	vec2 lightToPixel = pixel_coords - lightPosition;
+	vec3 lightToPixel = vec3(pixel_coords.x, pixel_coords.y, 0.0) - lightPosition;
 	float distance = length(lightToPixel);
 	float att = 1 - distance / lightRange;
 

shader/refraction.glsl

@@ -6,9 +6,9 @@ extern float refractionStrength = 1.0;
 vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords) {
 	vec2 pSize = vec2(1.0 / screen.x, 1.0 / screen.y);
 	vec4 normal = Texel(texture, texture_coords);
-	if(normal.a > 0.0) {
+	if(normal.b > 0.0) {
 		vec4 normalOffset = Texel(texture, vec2(texture_coords.x + (normal.x - 0.5) * pSize.x * refractionStrength, texture_coords.y + (normal.y - 0.5) * pSize.y * refractionStrength));
-		if(normalOffset.a > 0.0) {
+		if(normalOffset.b > 0.0) {
 			return Texel(backBuffer, vec2(texture_coords.x + (normal.x - 0.5) * pSize.x * refractionStrength, texture_coords.y + (normal.y - 0.5) * pSize.y * refractionStrength));
 		} else {
 			return Texel(backBuffer, texture_coords);

shader/scanlines.glsl

@@ -0,0 +1,31 @@
+extern vec2 screenHeight = vec2(800.0, 600.0);
+extern float time = 0.0;
+
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords){
+	vec2 pSize = 1.0 / screenHeight;
+	float brightness = 1.0;
+	float offsetX = sin(texture_coords.y * 10.0 + time * 2.0) * pSize.x;
+
+	if(texture_coords.x < 0.5) {
+		if(texture_coords.y < 0.5) {
+			brightness = min(texture_coords.x * texture_coords.y * 100.0, 1.0);
+		} else {
+			brightness = min(texture_coords.x * (1.0 - texture_coords.y) * 100.0, 1.0);
+		}
+	} else {
+		if(texture_coords.y < 0.5) {
+			brightness = min((1.0 - texture_coords.x) * texture_coords.y * 100.0, 1.0);
+		} else {
+			brightness = min((1.0 - texture_coords.x) * (1.0 - texture_coords.y) * 100.0, 1.0);
+		}
+	}
+	float red = Texel(texture, vec2(texture_coords.x + offsetX, texture_coords.y + pSize.y * 0.5)).r;
+	float green = Texel(texture, vec2(texture_coords.x + offsetX, texture_coords.y - pSize.y * 0.5)).g;
+	float blue = Texel(texture, vec2(texture_coords.x + offsetX, texture_coords.y)).b;
+
+	if(mod(texture_coords.y * screenHeight.y, 2.0) > 0.5) {
+		return vec4(vec3(red, green, blue) * brightness, 1.0);
+	} else {
+		return vec4(vec3(red * 0.75, green * 0.75, blue * 0.75) * brightness, 1.0);
+	}
+}

shader/tilt_shift.glsl

@@ -0,0 +1,12 @@
+extern Image buffer;
+
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords){
+	vec4 pixel = Texel(texture, texture_coords);
+	vec4 pixel2 = Texel(buffer, texture_coords);
+
+	if(texture_coords.y > 0.5) {
+		return vec4(pixel.rgb * (texture_coords.y - 0.5) * 2.0 + pixel2.rgb * (1.0 - texture_coords.y) * 2.0, 1.0);
+	} else {
+		return vec4(pixel.rgb * (0.5 - texture_coords.y) * 2.0 + pixel2.rgb * texture_coords.y * 2.0, 1.0);
+	}
+}