appdata中的顶点变量命名必须为vertex 
 
 
 
 
  
  struct appdata 
 
 
 
               { 
 
 
 
                    
  float4 vertex  
  : POSITION; 
 
 
 
                    
  float2 uv  
  : TEXCOORD0; 
 
 
 
                    
  float3 normal  
  : NORMAL; 
 
 
 
               }; 
 
 
  v2f中顶点变量命名必须为pos 
 
 
 
 
 
  
  struct v2f 
 
 
 
               { 
 
 
 
                    
  float2 uv  
  : TEXCOORD0; 
 
 
 
                    
  float4 pos  
  : SV_POSITION; 
 
 
 
                    
  float3 worldNormal  
  : TEXCOORD1; 
 
 
 
                    
  float3 viewDir  
  : TEXCOORD2; 
 
 
 
                    
  SHADOW_COORDS( 
  4) 
 
 
 
               }; 
 
 
  否则在vert方法中调用TRANSFER_SHADOW(o)方法时shader会报错:Shader error in 'XX': invalid subscript 'pos' 'ComputeScreenPos': no matching 1 parameter function at line 80 (on d3d11)