Common business logic in Shader

variable

• Diffuse is the color value entered by the user
• Map is diffuseMap is the map of the model

Color manipulation in Shader

• Color values entered by the diffuse user (including alpha)
  • Contains user input gradient maps

vec4 diffuseColor = vec4( diffuse, opacity );
#ifndef USE_MAP
    diffuseColor.rgb = pow(diffuseColor.rgb, vec3(2.2));
    #ifdef USE_GRADIENT
        #ifdef VERSION_1_3_0
            #ifndef STANDARD_SG
            #else
                diffuseColor.rgb = colorGradient();
            #endif
        #else
            diffuseColor.rgb = colorGradient();
        #endif
    #endif
#endif
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• The color in the texture
  • Standard case diffuseColor and map color calculation method
    • Need to judge the input color level and input good order NEED_ADJUST_COLOR
    • USE_GRADIENT needs to be judged
  • Non-standard (ThreeJS) default calculation

#ifdef USE_MAP
    vec4 texelColor = texture2D( map, vUv );
    texelColor = mapTexelToLinear( texelColor );
    #ifdef DECOLOR // grayscale
        float gray = texelColor.r * 0.3 + texelColor.g * 0.59 + texelColor.b * 0.11;
        texelColor.r = gray;
        texelColor.g = gray;
        texelColor.b = gray;
    #endif
    // Tips: 
    // 1. All color modifiers only affect RGB
    // 2. The diffuseColor function gamma
    #ifdef STANDARD
        #ifdef VERSION_1_3_0
            #ifdef NEED_ADJUST_COLOR
                diffuseColor.rgb = changeColorV130(texelColor, gradationInputBlack, gradationInputWhite, gradationGamma, gradationOutputBlack, gradationOutputWhite, diffuseColor).rgb;
            #else
                #ifndef STANDARD_SG // Color change is not supported
                    diffuseColor.rgb = pow(diffuseColor.rgb, vec3(2.2));
                    diffuseColor.rgb *= texelColor.rgb;
                #else
                    #ifdef USE_GRADIENT
                        diffuseColor.rgb = colorGradient();
                        diffuseColor.rgb = changeColorV130(texelColor, gradationInputBlack, gradationInputWhite, gradationGamma, gradationOutputBlack, gradationOutputWhite, diffuseColor).rgb;
                    #else
                        diffuseColor.rgb = texelColor.rgb;
                    #endif
                #endif
            #endif
        #else
            #ifdef NEED_ADJUST_COLOR
                diffuseColor.rgb = changeColorV130(texelColor, gradationInputBlack, gradationInputWhite, gradationGamma, gradationOutputBlack, gradationOutputWhite, diffuseColor).rgb;
            #else
                #ifdef USE_GRADIENT
                    diffuseColor.rgb = colorGradient();
                    diffuseColor.rgb = changeColorV130(texelColor, gradationInputBlack, gradationInputWhite, gradationGamma, gradationOutputBlack, gradationOutputWhite, diffuseColor).rgb;
                #else
                    diffuseColor.rgb = texelColor.rgb;
                #endif
            #endif
        #endif
        diffuseColor.a *= texelColor.a;
        #ifdef MAP_CLAMP_TO_EDGE 
            if (vUv.x >= 0.0 && vUv.x <= 1.0 && vUv.y >= 0.0 && vUv.y <= 1.0) {}else {
                diffuseColor.a = 0.0;
            }
        #endif 
        #ifdef DISCARD_MAP_ALPHA
            if(texelColor.a<0.001) discard; 
        #endif
    #else 
        diffuseColor *= texelColor; // The color multiplier
    #endif
#endif
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