1 files changed, 18 insertions, 7 deletions
diff --git a/shaders/world.frag b/shaders/world.frag
index d50e01d..3177795 100644
--- a/shaders/world.frag
+++ b/shaders/world.frag
@@ -3,6 +3,7 @@ uniform sampler2D normalTex;
 
 varying vec2 texCoord;
 varying vec4 color;
+varying vec3 fragCoord;
 
 uniform vec4 ambientLight;
 uniform vec4 light[128];
@@ -10,16 +11,26 @@ uniform vec4 lightColor[128];
 uniform float lightImpact;
 uniform int lightSize;
 
+float b = .0005f;
+float minLight = .05f;
+float radius = sqrt(1.0f / (b * minLight));
+
 void main()
 {
-
 	vec4 pixTex = texture2D(texture, vec2(texCoord.x, 1-texCoord.y));
-    if (pixTex.a < 0.1) 
+    if (pixTex.a < 0.1f) 
 		discard;
-    
-	if (lightSize > 0) {
-
+ 
+	vec4 shadeColor = vec4(0.0f, 0.0f, 0.0f, 0.0f);
+	for (int i = 0; i < lightSize; i++) {
+		vec2 loc = light[i].xy;
+		float dist = length(loc - fragCoord.xy);
+		float attenuation = clamp(1.0f - dist*dist/(radius*radius), 0.0f, 1.0f);
+		attenuation *= attenuation;
+		
+		shadeColor += vec4(attenuation, attenuation, attenuation, 1.0f) * vec4(lightColor[i]);		
 	}
-	
-	gl_FragColor = pixTex * color * pixTex.a;
+	shadeColor += ambientLight;	
+
+	gl_FragColor = pixTex * color * shadeColor;
 }