14 lines
614 B
Bash
14 lines
614 B
Bash
precision mediump float;
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varying vec4 vColor; //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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vec4 finalColor=vColor;
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//绕z轴转20度的矩阵
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mat4 mm=mat4(0.9396926,-0.34202012,0.0,0.0, 0.34202012,0.9396926,0.0,0.0,
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0.0,0.0,1.0,0.0, 0.0,0.0,0.0,1.0);
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vec4 tPosition=mm*vec4(vPosition,1);//将顶点坐标绕z轴转20度
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if(mod(tPosition.x+100.0,0.4)>0.3) {//计算X方向在不在红光色带范围内
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finalColor=vec4(0.4,0.0,0.0,1.0)+finalColor;//若在给最终颜色加上淡红色
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}
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gl_FragColor = finalColor;//给此片元颜色值
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} |