corner shaders.shad

const std::map<OpenGLData::OpenGLAttributes, String> OpenGLData::OpenGLAttributesMap =
{
    {OpenGLAttributes::Position, "position"}
};

const std::map<OpenGLData::OpenGLUniforms, String> OpenGLData::OpenGLUniformsMap =
{
    { OpenGLUniforms::Bounds, "bounds" },
    { OpenGLUniforms::Color1, "color1" },
    { OpenGLUniforms::Color2, "color2" }
};

#define NEW_LINE "\n"

String makeFragmentShaderHeader()
{
    return  "uniform vec4 " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ";" NEW_LINE
            "uniform vec4 " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color1) + ";" NEW_LINE
            "uniform vec4 " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color2) + ";" NEW_LINE;
}
const std::vector<std::vector<String>> FragmentShaders =
{
    //linear shaders
    {
        //UP
        {
//            "uniform vec4 " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ";" NEW_LINE
//            "uniform vec4 " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color1) + ";" NEW_LINE
//            "uniform vec4 " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color2) + ";" NEW_LINE
            makeFragmentShaderHeader() +
            "void main()" NEW_LINE
            "{" NEW_LINE
                "vec2 pos = gl_FragCoord.xy / " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".xy;" NEW_LINE
                "gl_FragColor = vec4(mix(" + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color1) + ", " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color2) + ", pos.y));" NEW_LINE
            "}" NEW_LINE
        },
        //DOWN
        {
            makeFragmentShaderHeader() +
            "void main()" NEW_LINE
            "{" NEW_LINE
                "vec2 pos = gl_FragCoord.xy / " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".xy;" NEW_LINE
                "gl_FragColor = vec4(mix(" + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color2) + ", " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color1) + ", pos.y));" NEW_LINE
            "}" NEW_LINE
        },
        //LEFT
        {
            makeFragmentShaderHeader() +
            "void main()" NEW_LINE
            "{" NEW_LINE
                "vec2 pos = gl_FragCoord.xy / " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".xy;" NEW_LINE
                "gl_FragColor = vec4(mix(" + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color1) + ", " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color2) + ", pos.x));" NEW_LINE
            "}" NEW_LINE
        },
        //RIGHT
        {
            makeFragmentShaderHeader() +
            "void main()" NEW_LINE
            "{" NEW_LINE
                "vec2 pos = gl_FragCoord.xy / " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".xy;" NEW_LINE
            "   gl_FragColor = vec4(mix(" + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color2) + ", " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Color1) + ", pos.x));" NEW_LINE
            "}" NEW_LINE
        },
    },
    //radial shaders
    {
        //UP        from LR clockwise
        /*
         a  |-------|b
            |       |
         c  |-------|d
         */
        {
            makeFragmentShaderHeader() +
            "void main()" NEW_LINE
            "{" NEW_LINE
            "   float x = " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".x  * 1.0/sqrt(2.0);" NEW_LINE
            "   float y = " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".y  * 1.0/sqrt(2.0);" NEW_LINE
            //lower right
            "   float alpha = distance( vec2(x,0), gl_FragCoord.xy) / distance( vec2(0,0), vec2(x,y) );" NEW_LINE
            "   gl_FragColor = mix (color1, color2, alpha);" NEW_LINE
            "}" NEW_LINE
        },
        //DOWN      from UL clockwise
        {
            makeFragmentShaderHeader() +
            "void main()" NEW_LINE
            "{" NEW_LINE
            "   float x = " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".x  * 1.0/sqrt(2.0);" NEW_LINE
            "   float y = " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".y  * 1.0/sqrt(2.0);" NEW_LINE
            "   float alpha = distance( vec2(0,y), gl_FragCoord.xy) / distance( vec2(0,0), vec2(x,y) );" NEW_LINE
            "   gl_FragColor = mix (color1, color2, alpha);" NEW_LINE
            "}" NEW_LINE
        },
        //LEFT      from UR clockwise
        {
            makeFragmentShaderHeader() +
            "void main()" NEW_LINE
            "{" NEW_LINE
            "   float x = " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".x * 1.0/sqrt(2.0);" NEW_LINE
            "   float y = " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".y * 1.0/sqrt(2.0);" NEW_LINE
            "   float alpha = distance( vec2(x,y), gl_FragCoord.xy) / distance( vec2(0,0), vec2(x,y) );" NEW_LINE
            "   gl_FragColor = mix (color1, color2, alpha);" NEW_LINE
            "}" NEW_LINE
        },
        //RIGHT     from LL clockwise
        {
            makeFragmentShaderHeader() +
            "void main()" NEW_LINE
            "{" NEW_LINE
            "float x = " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".x * 1.0/sqrt(2.0);" NEW_LINE
            "float y = " + OpenGLData::OpenGLUniformsMap.at(OpenGLData::OpenGLUniforms::Bounds) + ".y * 1.0/sqrt(2.0);" NEW_LINE
            //lower left:
            "   float alpha = distance( vec2(0,0), gl_FragCoord.xy) / distance( vec2(0,0), vec2(x,y) );" NEW_LINE
            "   gl_FragColor = mix (color1, color2, alpha);" NEW_LINE
            "}" NEW_LINE
        }
    },
};