24 lines
746 B
Bash
24 lines
746 B
Bash
precision mediump float;
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uniform float uR;
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varying vec2 mcLongLat;//接收从顶点着色器过来的参数
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varying vec3 vPosition;//接收从顶点着色器过来的顶点位置
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void main()
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{
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vec3 color;
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float n = 8.0;//一个坐标分量分的总份数
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float span = 2.0*uR/n;//每一份的长度
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//每一维在立方体内的行列数
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int i = int((vPosition.x + uR)/span);
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int j = int((vPosition.y + uR)/span);
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int k = int((vPosition.z + uR)/span);
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//计算当点应位于白色块还是黑色块中
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int whichColor = int(mod(float(i+j+k),2.0));
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if(whichColor == 1) {//奇数时为红色
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color = vec3(0.678,0.231,0.129);//红色
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}
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else {//偶数时为白色
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color = vec3(1.0,1.0,1.0);//白色
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}
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//将计算出的颜色给此片元
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gl_FragColor=vec4(color,0);
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} |