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GLSLで2色グラデーション

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Code

precision mediump float;
uniform vec2  m;       // mouse
uniform float t;       // time
uniform vec2  r;       // resolution
uniform sampler2D smp; // prev scene

void main(void){
    const vec4 color1 = vec4(0.0, 0.18, 0.28, 1.0); // 下
    const vec4 color2 = vec4(0.0, 0.0, 0.0, 1.0); // 上
    float percent = 1.0 - (gl_FragCoord.y / r.y);
    gl_FragColor = color1 * percent + color2 * (1.0 - percent);
}

結果

fragment.png

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