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第22章 夜鹰行动/AircraftAttack/assets/frag_xue.sh

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+precision mediump float;
+varying vec2 vTextureCoord; //接收纹理坐标参数
+varying float vertexHeight;//接受顶点的高度值
+varying float vertexwhidth;//接受血的最左边位置
+uniform sampler2D sTexture;//纹理内容数据
+uniform float ublood;
+void main()                         
+{
+  vec4 finalColor=texture2D(sTexture, vTextureCoord);
+  if(vertexwhidth<ublood&&vertexwhidth>-97.0&&vertexwhidth<97.0&&vertexHeight>-6.5&&vertexHeight<6.5)
+  {
+  	gl_FragColor = vec4(0.5,0.17,0.04,1.0);
+  }
+  else
+  {
+  	gl_FragColor=finalColor;
+  }
+}