Shader "GLSL basic shader" { // defines the name of the shaderSubShader { // Unity chooses the subshader that fits the GPU bestPass { // some shaders require multiple passesGLSLPROGRAM // here begins the part in Unity's GLSL#ifdef VERTEX // here begins the vertex shadervoid main() // all vertex shaders define a main() function{gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;// this line transforms the predefined attribute// gl_Vertex of type vec4 with the predefined// uniform gl_ModelViewProjectionMatrix of type mat4// and stores the result in the predefined output// variable gl_Position of type vec4.}#endif // here ends the definition of the vertex shader#ifdef FRAGMENT // here begins the fragment shadervoid main() // all fragment shaders define a main() function{gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);// this fragment shader just sets the output color// to opaque red (red = 1.0, green = 0.0, blue = 0.0,// alpha = 1.0)}#endif // here ends the definition of the fragment shaderENDGLSL // here ends the part in GLSL} }}这样Shader就编辑好了。观察一下发现，这里一个文件中包含了Vertex Shader和Fragment Shader，这个有别于GLSL，不过其他就没有变化了（以后可能会有些优化，比如varying变量，在传统的GLSL中，需要在Vertex和Fragment中都定义一下，而且变量名称要一致，在Unity中可以把varying变量起到前面，，写一份就可以了，减少了代码编写和错误的发生）
然后继续努力，把让自己跌倒的石头搬掉或绕过去，不就解决问题了吗?
