snuvi-engine/src/me/hammerle/snuviengine/shader/fragment.fs

#version 430

uniform sampler2D samp;

uniform mat4 viewMatrix;
uniform mat4 modelMatrix;
uniform vec3 ambientLight;

struct Light {
    vec2 pos;
    float strength;
    vec3 color;
}; 

uniform Light lights[32];

uniform bool useTexture;
uniform bool useColor;
uniform bool useLight;
uniform bool useMixColor;
uniform vec4 mixColor;

in vec2 tc;
in vec2 loc;
in vec4 vColor;
out vec4 color;

vec3 getLight() {
    vec3 light = vec3(0, 0, 0);
    for(int i = 0; i < 32; i++) {
        light += lights[i].color * max(1 - lights[i].strength * length(loc - lights[i].pos), 0);
    }
    return light;
}

void main(void) {
    if(useTexture) {
        color = texture(samp, tc);
        if(color.a == 0.0){
            discard;
        }
        if(useColor) {
            if(useMixColor) {
                color = (color + mixColor) * 0.5;
            } else{
                color = vColor;
            }
        }
    } else {
        color = vColor;
    }

    if(useLight) {
        color = vec4(pow(pow(color.xyz, vec3(1 / 2.2)) * (ambientLight + getLight()), vec3(2.2)), color.w);
    }
}