Unity3d_Vertex&Fragment_Shader添加阴影的方法

Shader "ZX/BaseVertFragmentShadow" 

 { 

 Properties { _DiffuseTexture ( "Diffuse Texture", 2D) = "white" {} _DiffuseTint ( "Diffuse Tint", Color) = ( 1, 1, 1, 1) }

 SubShader { 

 Tags { "RenderType"= "Opaque" } 

 pass { Tags { "LightMode"= "ForwardBase"} //第一步//

CGPROGRAM #pragma vertex vertShadow

#pragma fragment fragShadow 

  #pragma multi_compile_fwdbase//第二步//

#include "UnityCG.cginc" 

  #include "AutoLight.cginc" //第三步// 

 sampler2D _DiffuseTexture; 

 float4 _DiffuseTint;

 float4 _LightColor0; //第四步// 

  struct v2f

 { 

 float4 pos : SV_POSITION; 

 float2 uv : TEXCOORD2; 

 LIGHTING_COORDS( 0, 1) //第五步// 

 };

 v2f vertShadow(appdata_base v) 

 { 

 v2f o; o.pos = mul(UNITY_MATRIX_MVP, v.vertex); 

 o.uv = v.texcoord; 

 TRANSFER_VERTEX_TO_FRAGMENT(o); //第六步// 

  return o;

 }

 float4 fragShadow(v2f i) : COLOR 

 { 

 float4 diffuse = tex2D(_DiffuseTexture, i.uv); 

 float4 diffuseTerm = _LightColor0 * LIGHT_ATTENUATION(i); //第七步//

float4 finalColor = diffuseTerm * diffuse * _DiffuseTint;

  return finalColor; 

 } 

 ENDCG } } 

 FallBack "Diffuse"}