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#version 130
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
uniform sampler2D textu;
uniform sampler2D normu;
in vec2 texCoord;
in vec4 fragCoord;
out vec4 FragColor;
uniform vec3 LightPos[32];
uniform vec4 LightColor[32];
uniform int LightNum;
uniform vec4 AmbientLight;
uniform int Flipped;
void main()
{
// Quadratic light falloff
vec3 Falloff = vec3(0.4, 0.1, 0.002);
vec4 DiffuseColor = texture2D(textu, texCoord);
if (DiffuseColor.a < 0.1f)
discard;
vec3 NormalMap = texture2D(normu, texCoord).rgb;
vec3 SumLight = vec3(0.0);
for (int i = 0; i < LightNum; i++) {
vec3 LightDir = vec3(LightPos[i].xy - fragCoord.xy,
(LightPos[i].z - fragCoord.z)*2);
float D = length(LightDir);
vec3 N = normalize(NormalMap * 2.0 - 1.0);
vec3 L = normalize(LightDir);
if (Flipped == 1)
N.x = -N.x;
vec3 Diffuse =
(LightColor[i].rgb * LightColor[i].a) * max(dot(N, L), 0.0);
vec3 Ambient = AmbientLight.rgb * AmbientLight.a;
float Attenuation =
1.0 / (Falloff.x + (Falloff.y * D) + (Falloff.z * D * D));
vec3 Intensity = Ambient + Diffuse + Attenuation;
vec3 FinalColor = DiffuseColor.rgb * Intensity;
SumLight += FinalColor;
}
FragColor = vec4(SumLight, DiffuseColor.a);
};
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