28 lines
1.1 KiB
Bash
28 lines
1.1 KiB
Bash
uniform mat4 uMVPMatrix; //总变换矩阵
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uniform float uStartAngle;//本帧起始角度
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uniform float uWidthSpan;//横向长度总跨度
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attribute vec3 aPosition; //顶点位置
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attribute vec2 aTexCoor; //顶点纹理坐标
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varying vec2 vTextureCoord; //用于传递给片元着色器的变量
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void main()
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{
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//计算X向角度
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float angleSpanH=30.0*3.14159265;//横向角度总跨度
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float startX=0.0;//起始X坐标
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//根据横向角度总跨度、横向长度总跨度及当前点X坐标折算出当前点X坐标对应的角度
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float currAngleH=uStartAngle+((aPosition.x-startX)/uWidthSpan)*angleSpanH;
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//计算出随z向发展起始角度的扰动值
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float startZ=0.0;//起始z坐标
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//根据纵向角度总跨度、纵向长度总跨度及当前点Y坐标折算出当前点Y坐标对应的角度
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float currAngleZ=((aPosition.z-startZ)/uWidthSpan)*angleSpanH;
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//计算斜向波浪
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float tzH=sin(currAngleH-currAngleZ)*0.8;
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//根据总变换矩阵计算此次绘制此顶点位置
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gl_Position = uMVPMatrix * vec4(aPosition.x,tzH,aPosition.z,1);
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// gl_Position = uMVPMatrix * vec4(aPosition,1);
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vTextureCoord = aTexCoor;//将接收的纹理坐标传递给片元着色器
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} |