Add directional light.

light.lua

@@ -12,7 +12,7 @@ LOVE_LIGHT_TRANSLATE_X = 0
 LOVE_LIGHT_TRANSLATE_Y = 0
 LOVE_LIGHT_TRANSLATE_X_OLD = 0
 LOVE_LIGHT_TRANSLATE_Y_OLD = 0
-
+LOVE_LIGHT_DIRECTION = 0
 love.light = {}
 
 -- light world
@@ -26,6 +26,7 @@ function love.light.newWorld()
 	o.shadow = love.graphics.newCanvas()
 	o.shadow2 = love.graphics.newCanvas()
 	o.shine = love.graphics.newCanvas()
+	o.shine2 = love.graphics.newCanvas()
 	o.normalMap = love.graphics.newCanvas()
 	o.glowMap = love.graphics.newCanvas()
 	o.glowMap2 = love.graphics.newCanvas()
@@ -68,10 +69,14 @@ function love.light.newWorld()
 				then
 					local lightposrange = {o.lights[i].x, love.graphics.getHeight() - o.lights[i].y, o.lights[i].range}
 					LOVE_LIGHT_CURRENT = o.lights[i]
-					o.shader:send("lightPositionRange", {o.lights[i].x - LOVE_LIGHT_TRANSLATE_X, love.graphics.getHeight() - (o.lights[i].y - LOVE_LIGHT_TRANSLATE_Y), o.lights[i].range})
+					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("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)
 					o.shader:send("lightGlow", {1.0 - o.lights[i].glowSize, o.lights[i].glowStrength})
+					o.shader:send("lightAngle", math.pi - o.lights[i].angle / 2.0)
+					o.shader:send("lightDirection", o.lights[i].direction)
 
 					--if o.changed then
 						--love.graphics.setCanvas(o.shadow)
@@ -200,6 +205,8 @@ function love.light.newWorld()
 				o.normalShader:send('lightPosition',{o.lights[i].x, love.graphics.getHeight() - o.lights[i].y, o.lights[i].z / 255.0})
 				o.normalShader:send('lightRange',{o.lights[i].range})
 				o.normalShader:send("lightSmooth", o.lights[i].smooth)
+				o.normalShader:send("lightAngle", math.pi - o.lights[i].angle / 2.0)
+				o.normalShader:send("lightDirection", o.lights[i].direction)
 				love.graphics.setShader(o.normalShader)
 				love.graphics.draw(o.normalMap, LOVE_LIGHT_TRANSLATE_X, LOVE_LIGHT_TRANSLATE_Y)
 			end
@@ -285,10 +292,28 @@ function love.light.newWorld()
 	-- draw shine
 	o.drawShine = function()
 		love.graphics.setColor(255, 255, 255)
+		if o.blur and false then
+			LOVE_LIGHT_LAST_BUFFER = love.graphics.getCanvas()
+			LOVE_LIGHT_BLURV:send("steps", o.blur)
+			LOVE_LIGHT_BLURH:send("steps", o.blur)
+			love.graphics.setBlendMode("alpha")
+			love.graphics.setCanvas(o.shine2)
+			love.graphics.setShader(LOVE_LIGHT_BLURV)
+			love.graphics.draw(o.shine, LOVE_LIGHT_TRANSLATE_X, LOVE_LIGHT_TRANSLATE_Y)
+			love.graphics.setCanvas(o.shine)
+			love.graphics.setShader(LOVE_LIGHT_BLURH)
+			love.graphics.draw(o.shine2, LOVE_LIGHT_TRANSLATE_X, LOVE_LIGHT_TRANSLATE_Y)
+			love.graphics.setCanvas(LOVE_LIGHT_LAST_BUFFER)
 			love.graphics.setBlendMode("multiplicative")
 			love.graphics.setShader()
 			love.graphics.draw(o.shine, LOVE_LIGHT_TRANSLATE_X, LOVE_LIGHT_TRANSLATE_Y)
 			love.graphics.setBlendMode("alpha")
+		else
+			love.graphics.setBlendMode("multiplicative")
+			love.graphics.setShader()
+			love.graphics.draw(o.shine, LOVE_LIGHT_TRANSLATE_X, LOVE_LIGHT_TRANSLATE_Y)
+			love.graphics.setBlendMode("alpha")
+		end
 	end
 	-- draw pixel shadow
 	o.drawPixelShadow = function()
@@ -424,6 +449,14 @@ function love.light.newWorld()
 	o.setLightY = function(n, y)
 		o.lights[n].setY(y)
 	end
+	-- set light angle
+	o.setLightAngle = function(n, angle)
+		o.lights[n].setAngle(angle)
+	end
+	-- set light direction
+	o.setLightDirection = function(n, direction)
+		o.lights[n].setDirection(direction)
+	end
 	-- get light count
 	o.getLightCount = function()
 		return #o.lights
@@ -447,15 +480,18 @@ end
 -- light object
 function love.light.newLight(p, x, y, red, green, blue, range)
 	local o = {}
+	o.direction = 0
+	o.angle = math.pi * 2.0
+	o.range = 0
 	o.shadow = love.graphics.newCanvas()
 	o.shine = love.graphics.newCanvas()
-	o.x = x
+	o.x = x or 0
-	o.y = y
+	o.y = y or 0
 	o.z = 15
-	o.red = red
+	o.red = red or 255
-	o.green = green
+	o.green = green or 255
-	o.blue = blue
+	o.blue = blue or 255
-	o.range = range
+	o.range = range or 300
 	o.smooth = 1.0
 	o.glowSize = 0.1
 	o.glowStrength = 0.0
@@ -505,6 +541,32 @@ function love.light.newLight(p, x, y, red, green, blue, range)
 			o.changed = true
 		end
 	end
+	-- set direction
+	o.setDirection = function(direction)
+		if direction ~= o.direction then
+			if direction > math.pi * 2 then
+				o.direction = math.mod(direction, math.pi * 2)
+			elseif direction < 0.0 then
+				o.direction = math.pi * 2 - math.mod(math.abs(direction), math.pi * 2)
+			else
+				o.direction = direction
+			end
+			o.changed = true
+		end
+	end
+	-- set angle
+	o.setAngle = function(angle)
+		if angle ~= o.angle then
+			if angle > math.pi then
+				o.angle = math.mod(angle, math.pi)
+			elseif angle < 0.0 then
+				o.angle = math.pi - math.mod(math.abs(angle), math.pi)
+			else
+				o.angle = angle
+			end
+			o.changed = true
+		end
+	end
 	-- set glow size
 	o.setSmooth = function(smooth)
 		o.smooth = smooth
@@ -672,7 +734,7 @@ function love.light.newCircle(p, x, y, radius)
 	o.id = #p.circle
 	o.x = x or 0
 	o.y = y or 0
-	o.radius = radius or 200
+	o.radius = radius or 64
 	o.shine = true
 	o.red = 255
 	o.green = 255

main.lua

@@ -45,22 +45,22 @@ function love.load()
 	imgFloor:setWrap("repeat", "repeat")
 
 	-- load image examples
-	circle = love.graphics.newImage "gfx/circle.png"
+	circle = love.graphics.newImage("gfx/circle.png")
-	circle_normal = love.graphics.newImage "gfx/circle_normal.png"
+	circle_normal = love.graphics.newImage("gfx/circle_normal.png")
-	cone = love.graphics.newImage "gfx/cone.png"
+	cone = love.graphics.newImage("gfx/cone.png")
-	cone_normal = love.graphics.newImage "gfx/cone_normal.png"
+	cone_normal = love.graphics.newImage("gfx/cone_normal.png")
-	chest = love.graphics.newImage "gfx/chest.png"
+	chest = love.graphics.newImage("gfx/chest.png")
-	chest_normal = love.graphics.newImage "gfx/chest_normal.png"
+	chest_normal = love.graphics.newImage("gfx/chest_normal.png")
-	machine = love.graphics.newImage "gfx/machine.png"
+	machine = love.graphics.newImage("gfx/machine.png")
-	machine_normal = love.graphics.newImage "gfx/machine_normal.png"
+	machine_normal = love.graphics.newImage("gfx/machine_normal.png")
-	machine_glow = love.graphics.newImage "gfx/machine_glow.png"
+	machine_glow = love.graphics.newImage("gfx/machine_glow.png")
-	machine2 = love.graphics.newImage "gfx/machine2.png"
+	machine2 = love.graphics.newImage("gfx/machine2.png")
-	machine2_normal = love.graphics.newImage "gfx/machine2_normal.png"
+	machine2_normal = love.graphics.newImage("gfx/machine2_normal.png")
-	machine2_glow = love.graphics.newImage "gfx/machine2_glow.png"
+	machine2_glow = love.graphics.newImage("gfx/machine2_glow.png")
-	blopp = love.graphics.newImage "gfx/blopp.png"
+	blopp = love.graphics.newImage("gfx/blopp.png")
-	tile = love.graphics.newImage "gfx/tile.png"
+	tile = love.graphics.newImage("gfx/tile.png")
-	tile_normal = love.graphics.newImage "gfx/tile_normal.png"
+	tile_normal = love.graphics.newImage("gfx/tile_normal.png")
-	tile_glow = love.graphics.newImage "gfx/tile_glow.png"
+	tile_glow = love.graphics.newImage("gfx/tile_glow.png")
 
 	-- light world
 	lightRange = 400
@@ -70,6 +70,7 @@ function love.load()
 	mouseLight = lightWorld.newLight(0, 0, 255, 127, 63, lightRange)
 	mouseLight.setGlowStrength(0.3)
 	mouseLight.setSmooth(lightSmooth)
+	lightDirection = 0.0
 
 	-- init physic world
 	initScene()
@@ -96,6 +97,7 @@ function love.update(dt)
 	mouseLight.setPosition(love.mouse.getX(), love.mouse.getY())
 	mx = love.mouse.getX()
 	my = love.mouse.getY()
+	lightDirection = lightDirection + dt
 
 	if love.keyboard.isDown("w") then
 		for i = 1, phyCnt do
@@ -138,6 +140,10 @@ function love.update(dt)
 		offsetChanged = false
 	end
 
+    for i = 1, lightWorld.getLightCount() do
+		lightWorld.setLightDirection(i, lightDirection)
+    end
+
     for i = 1, phyCnt do
 		if phyBody[i]:isAwake() or offsetChanged then
 			if offsetChanged then
@@ -499,16 +505,20 @@ function love.keypressed(k, u)
 		phyFixture[phyCnt] = love.physics.newFixture(phyBody[phyCnt], phyShape[phyCnt])
 		phyFixture[phyCnt]:setRestitution(0.5)
 	elseif k == "0" then
-		-- add image
+		-- add light
-		phyCnt = phyCnt + 1
+		local r = lightWorld.getLightCount() % 3
-		phyLight[phyCnt] = lightWorld.newImage(cone, mx, my, 24, 12, 12, 28)
+		local light
-		phyLight[phyCnt].setNormalMap(cone_normal)
+
-		phyLight[phyCnt].setAlpha(0.0)
+		if r == 0 then
-		math.randomseed(phyCnt)
+			light = lightWorld.newLight(mx, my, 31, 127, 63, lightRange)
-		phyLight[phyCnt].setColor(math.random(0, 255), math.random(0, 255), math.random(0, 255))
+		elseif r == 1 then
-		phyBody[phyCnt] = love.physics.newBody(physicWorld, mx, my, "dynamic")
+			light = lightWorld.newLight(mx, my, 127, 63, 31, lightRange)
-		phyShape[phyCnt] = love.physics.newRectangleShape(0, 0, 24, 32)
+		else
-		phyFixture[phyCnt] = love.physics.newFixture(phyBody[phyCnt], phyShape[phyCnt])
+			light = lightWorld.newLight(mx, my, 31, 63, 127, lightRange)
-		phyFixture[phyCnt]:setRestitution(0.5)
+		end
+		light.setSmooth(lightSmooth)
+		light.setGlowStrength(0.3)
+		math.randomseed(love.timer.getTime())
+		light.setAngle(math.random(1, 5) * 0.1 * math.pi)
 	end
 end

shader/normal.glsl

@@ -1,18 +1,35 @@
+#define PI 3.1415926535897932384626433832795
+
 extern vec2 screenResolution;
 extern vec3 lightPosition;
 extern vec3 lightColor;
 extern float lightRange;
 extern float lightSmooth;
+extern float lightDirection;
+extern float lightAngle;
 
-vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords) {
+vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords) {
     vec4 pixelColor = Texel(texture, texture_coords);
 
 	if(pixelColor.a > 0.0) {
+		if(lightAngle > 0.0) {
+			float angle2 = atan(lightPosition.x - pixel_coords.x, pixel_coords.y - lightPosition.y) + PI;
+			if(lightDirection - lightAngle > 0 && lightDirection + lightAngle < PI * 2) {
+				if(angle2 < mod(lightDirection + lightAngle, PI * 2) && angle2 > mod(lightDirection - lightAngle, PI * 2)) {
+					return vec4(0.0, 0.0, 0.0, 1.0);
+				}
+			} else {
+				if(angle2 < mod(lightDirection + lightAngle, PI * 2) || angle2 > mod(lightDirection - lightAngle, PI * 2)) {
+					return vec4(0.0, 0.0, 0.0, 1.0);
+				}
+			}
+		}
+
 		vec3 normal = vec3(pixelColor.r, 1 - pixelColor.g, pixelColor.b);
-		float dist = distance(lightPosition, vec3(screen_coords, normal.b));
+		float dist = distance(lightPosition, vec3(pixel_coords, normal.b));
 
 		if(dist < lightRange) {
-			vec3 dir = vec3((lightPosition.xy - screen_coords.xy) / screenResolution.xy, lightPosition.z);
+			vec3 dir = vec3((lightPosition.xy - pixel_coords.xy) / screenResolution.xy, lightPosition.z);
 
 			dir.x *= screenResolution.x / screenResolution.y;
 

shader/poly_shadow.glsl

@@ -1,22 +1,40 @@
-extern vec3 lightPositionRange;
+#define PI 3.1415926535897932384626433832795
+
+extern vec2 lightPosition;
 extern vec3 lightColor;
+extern float lightRange;
 extern float lightSmooth;
 extern vec2 lightGlow;
+extern float lightDirection;
+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 - lightPositionRange.xy;
+	vec2 lightToPixel = pixel_coords - lightPosition;
 	float distance = length(lightToPixel);
-	float att = 1 - distance / lightPositionRange.z;
+	float att = 1 - distance / lightRange;
 
-	if (distance <= lightPositionRange.z) {
+	if(lightAngle > 0.0) {
+		float angle2 = atan(lightPosition.x - pixel_coords.x, pixel_coords.y - lightPosition.y) + PI;
+		if(lightDirection - lightAngle > 0 && lightDirection + lightAngle < PI * 2) {
+			if(angle2 < mod(lightDirection + lightAngle, PI * 2) && angle2 > mod(lightDirection - lightAngle, PI * 2)) {
+				return vec4(0.0, 0.0, 0.0, 1.0);
+			}
+		} else {
+			if(angle2 < mod(lightDirection + lightAngle, PI * 2) || angle2 > mod(lightDirection - lightAngle, PI * 2)) {
+				return vec4(0.0, 0.0, 0.0, 1.0);
+			}
+		}
+	}
+
+	if (distance <= lightRange) {
 		if (lightGlow.x < 1.0 && lightGlow.y > 0.0) {
 			pixel.rgb = clamp(lightColor * pow(att, lightSmooth) + pow(smoothstep(lightGlow.x, 1.0, att), lightSmooth) * lightGlow.y, 0.0, 1.0);
 		} else {
 			pixel.rgb = lightColor * pow(att, lightSmooth);
 		}
 	} else {
-		pixel.rgb = vec3(0, 0, 0);
+		return vec4(0.0, 0.0, 0.0, 1.0);
 	}
 
 	return pixel;