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第21章 火力篮球/BasketBall_Shot/assets/vertex_net.sh

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+uniform mat4 uMVPMatrix; //总变换矩阵
+
+attribute vec3 aPosition;  //顶点位置
+uniform int uraodon;//扰动值
+
+attribute vec2 aTexCoor;    //顶点纹理坐标
+varying vec2 vTextureCoord;  //用于传递给片元着色器的变量
+void main()     
+{                  
+   vec4 rPosition=vec4(aPosition,1);
+   float raodonR=0.0;
+   if(uraodon==1)
+   {
+     
+     if(rPosition.y<0.46)
+     {
+       raodonR=sqrt(rPosition.y)/4.0;
+       rPosition.x=rPosition.x+raodonR;
+     }
+     else
+     {
+       raodonR=sqrt(1.12-rPosition.y)/4.0;
+       rPosition.x=rPosition.x+raodonR;
+     }
+     
+   }
+   else if(uraodon==3)
+   {
+     
+     if(rPosition.y<0.46)
+     {
+       raodonR=sqrt(rPosition.y)/4.0;
+       rPosition.x=rPosition.x-raodonR;
+     }
+     else
+     {
+       raodonR=sqrt(1.12-rPosition.y)/4.0;
+       rPosition.x=rPosition.x-raodonR;
+     }
+     
+   }
+   
+      gl_Position =uMVPMatrix * rPosition; //根据总变换矩阵计算此次绘制此顶点位置
+   
+  
+   
+   
+   vTextureCoord = aTexCoor;//将接收的纹理坐标传递给片元着色器
+}