纹理

Question

我正在尝试制作一个过滤器来替换图像中的颜色 颜色替换很好这里是一个例子

private _createColorFilter(shaderTexture, materialTexture) {
    const uniforms = {
        uTextureOne: {
            type: 'f',
            value: 0.1
        },
        uTextureTwo: {
            type: 'sampler2D',
            value : shaderTexture
        }
    };

    const shaderCode = `
        varying vec2 vTextureCoord;
        varying vec4 vColor;
        uniform sampler2D uTextureOne;
        uniform float customUniform;

        void main(){
            vec4 one = texture2D(uTextureOne, vTextureCoord);

            float percent = (one.r-one.g)/255.0;
            one.r = one.r + (254.0 - 255.0)*percent;
            one.g = one.g + 255.0 * percent;
            one.b = one.b + 47.0 * percent;

            gl_FragColor = one;
        }`;
    return new PIXI.Filter('', shaderCode, uniforms);
}

我想实现相同的效果，但现在使用纹理颜色 从逻辑上讲，我需要从纹理中获取颜色，并根据我的算法，将其更改为适合色调

但是，不去（（

private _createColorFilter(shaderTexture, materialTexture) {
    const uniforms = {
        uTextureOne: {
            type: 'f',
            value: 0.1
        },
        uTextureTwo: {
            type: 'sampler2D',
            value : shaderTexture
        }
    };

    const shaderCode = `
        varying vec2 vTextureCoord;
        varying vec4 vColor;
        uniform sampler2D uTextureOne;
        uniform sampler2D uTextureTwo;
        uniform float customUniform;

        void main(){
            vec4 one = texture2D(uTextureOne, vTextureCoord);
            var4 two = texture2D(uTextureTwo, vTextureCoord);
            float percent = (one.r-one.g)/255.0;
            one.r = one.r + (two.r - 255.0)*percent;
            one.g = one.g + two.g * percent;
            one.b = one.b + two.b * percent;

            gl_FragColor = one;
        }`;
    return new PIXI.Filter('', shaderCode, uniforms);

颜色变黑

请帮帮我