Made light.glsl GL_ES compatible.

Author: messersm

circle-amongst-squares/light.glsl

@@ -1,5 +1,5 @@
 // Source of the light in screen coordinates
-extern vec2 sourcePos = vec2(0, 0);
+extern vec2 sourcePos;
 
 number dist(vec2 pos1, vec2 pos2) {
     return (pos1.x - pos2.x) * (pos1.x - pos2.x) +
@@ -10,17 +10,17 @@ vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords){
     vec4 pixel = Texel(texture, texture_coords);
     number distance = dist(sourcePos, screen_coords);
 
-    if (distance > 10000) {
-        pixel.r = 0;
-        pixel.g = 0;
-        pixel.b = 0;
+    if (distance > 10000.0) {
+        pixel.r = 0.0;
+        pixel.g = 0.0;
+        pixel.b = 0.0;
     }
     // For some reason this doesn't cause problems
     // even if distance is 0...
     else {
-        pixel.r *= 1000 / distance;
-        pixel.g *= 1000 / distance;
-        pixel.b *= 1000 / distance;
+        pixel.r *= 1000.0 / distance;
+        pixel.g *= 1000.0 / distance;
+        pixel.b *= 1000.0 / distance;
     }
     return pixel * color;
 }

circle-amongst-squares/main.lua

@@ -75,7 +75,6 @@ function love.load()
     movesound = love.audio.newSource("res/movement.ogg", "static")
     next_move_in = love.math.random(10, 20)
 
-    light = love.graphics.newShader("light.glsl")
     world = bump.newWorld()
     squares = {}
     circle = {x=0, y=0, dx=0, dy=0, speed=100, r=10, color={1, 1, 1, 1}}
@@ -87,6 +86,7 @@ function love.load()
         world:add(square, square.x, square.y, square.width, square.height)
     end
 
+    light = love.graphics.newShader("light.glsl")
     light:send("sourcePos", {circle.x + circle.r, circle.y + circle.r})
 end