uniform sampler2D texture;
uniform sampler2D normalTex;

varying vec2 texCoord;
varying vec4 color;
varying vec4 fragCoord;

uniform vec4 ambientLight;
uniform vec4 light[128];
uniform vec4 lightColor[128];
uniform float lightImpact;
uniform int lightSize;

void main()
{
	vec2 texLoc = vec2(texCoord.x, 1-texCoord.y);
	vec4 pixTex = texture2D(texture, texLoc);
    if (pixTex.a < 0.1f) 
		discard;
   
	vec4 shadeColor = vec4(0.0f, 0.0f, 0.0f, 0.0f);
	if (lightImpact > 0.0f) {
		for (int i = 0; i < lightSize; i++) {
			vec2 loc = light[i].xy;
			float dist = length(loc - fragCoord.xy);
			if (dist < light[i].w) {
				float attenuation = clamp(1.0f - dist*dist/(light[i].w*light[i].w), 0.0f, 1.0f);
				attenuation *= attenuation;
				shadeColor += (vec4(attenuation, attenuation, attenuation, 0.0f) * vec4(lightColor[i])) * lightImpact;
			}
		}
	}
	shadeColor += ambientLight;

	gl_FragColor = pixTex * color * shadeColor;
}