spoonedit/Shaders/MapGenPP.fsh

#version 460
layout(location = 0) out vec4 FragColor;

in vec2 TexCoord;

uniform sampler2D Tex;

float pixel = 1.0f/1600.0f;

vec3 accentColor = vec3(0.8f,0.533f,0.6f);
//vec3(0,1,1);


vec2 SampleCircle[22] = vec2[22](
vec2(0.0f*pixel,1.0f*pixel),
vec2(0.28173255684142967f*pixel,0.9594929736144974f*pixel),
vec2(0.5406408174555976f*pixel,0.8412535328311812f*pixel),
vec2(0.7557495743542583f*pixel,0.6548607339452851f*pixel),
vec2(0.9096319953545183f*pixel,0.41541501300188644f*pixel),
vec2(0.9898214418809327f*pixel,0.14231483827328512f*pixel),
vec2(0.9898214418809328f*pixel,-0.142314838273285f*pixel),
vec2(0.9096319953545184f*pixel,-0.4154150130018863f*pixel),
vec2(0.7557495743542583f*pixel,-0.654860733945285f*pixel),
vec2(0.5406408174555978f*pixel,-0.8412535328311811f*pixel),
vec2(0.28173255684142967f*pixel,-0.9594929736144974f*pixel),
vec2(0.00000000000000012246467991473532f*pixel,-1.0f*pixel),
vec2(-0.2817325568414294f*pixel,-0.9594929736144975f*pixel),
vec2(-0.5406408174555976f*pixel,-0.8412535328311812f*pixel),
vec2(-0.7557495743542582f*pixel,-0.6548607339452852f*pixel),
vec2(-0.9096319953545184f*pixel,-0.4154150130018864f*pixel),
vec2(-0.9898214418809327f*pixel,-0.14231483827328523f*pixel),
vec2(-0.9898214418809328f*pixel,0.14231483827328487f*pixel),
vec2(-0.9096319953545186f*pixel,0.41541501300188605f*pixel),
vec2(-0.7557495743542582f*pixel,0.6548607339452853f*pixel),
vec2(-0.5406408174555974f*pixel,0.8412535328311812f*pixel),
vec2(-0.2817325568414298f*pixel,0.9594929736144974f*pixel)
);

vec2 SampleCircleSmol[16] = vec2[16](
vec2(0.0f*pixel,1.0f*pixel),
vec2(0.3826834323650898f*pixel,0.9238795325112867f*pixel),
vec2(0.7071067811865475f*pixel,0.7071067811865476f*pixel),
vec2(0.9238795325112867f*pixel,0.38268343236508984f*pixel),
vec2(1.0f*pixel,0.00000000000000006123233995736766f*pixel),
vec2(0.9238795325112867f*pixel,-0.3826834323650897f*pixel),
vec2(0.7071067811865476f*pixel,-0.7071067811865475f*pixel),
vec2(0.3826834323650899f*pixel,-0.9238795325112867f*pixel),
vec2(0.00000000000000012246467991473532f*pixel,-1.0f*pixel),
vec2(-0.38268343236508967f*pixel,-0.9238795325112868f*pixel),
vec2(-0.7071067811865475f*pixel,-0.7071067811865477f*pixel),
vec2(-0.9238795325112865f*pixel,-0.38268343236509034f*pixel),
vec2(-1.0f*pixel,-0.00000000000000018369701987210297f*pixel),
vec2(-0.9238795325112866f*pixel,0.38268343236509f*pixel),
vec2(-0.7071067811865477f*pixel,0.7071067811865474f*pixel),
vec2(-0.3826834323650904f*pixel,0.9238795325112865f*pixel)
);

vec2 SampleDirs[4] = vec2[4](vec2(-pixel,0.0f),
                                vec2(0.0f,-pixel),
                                vec2(0.0f,pixel),
                                vec2(pixel,0.0f));

float euler = 2.71828182845904523536f;

float distribution = 7.5f;

float maxinc = 0.5f;

float gaussian(float x){
    return maxinc * pow(euler,
                -(pow(x,2.0f)
                /
                pow(2.0f*distribution,2.0f)));
}

void main(){
    vec4 color = texture(Tex,TexCoord.xy);

    FragColor = color;

    if(color.a != 1){
        for(int j = 1; j <= 2; j++){
            for(int i = 0; i < 16; i++){
                float Test = texture(Tex, vec2(TexCoord.xy + (SampleCircleSmol[i].xy * j))).a;

                if(Test != 0)
                    FragColor = vec4(accentColor,1);
            }
        }
    }

    if(color.a > 0){
        bool finished = false;
        for(float i = 1.0f; i < 64.0f; i += 2.0f){
            for(int j = 0; j < 22; j++){
                float Test = texture(Tex, vec2(TexCoord.xy + (SampleCircle[j].xy * i))).a;

                if(Test == 0 && !finished){
                    float val = gaussian(i);

                    FragColor = vec4((accentColor * val * 2.0f ) + (color.xyz * 1.0f - val ),1.0f);
                    finished = true;

                }
            }
        }
    }

}