Shader 版本差异

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1、mul( UNITY_MATRIX_MVP, IN.vertex ) -> UnityObjectToClipPos(IN.vertex)

2、_Object2World -> unity_ObjectToWorld

3、float2 uvst = UnityStereoScreenSpaceUVAdjust(i.texcoord, _MainTex_ST); 

报错：undeclared identifier 'UnityStereoScreenSpaceUVAdjust'

解决方法：

自己添加代码：

float2：

inline float2 UnityStereoScreenSpaceUVAdjust(float2 uv, float4 scaleAndOffset)
{
    return uv.xy * scaleAndOffset.xy + scaleAndOffset.zw;
}

float4：

inline float4 UnityStereoScreenSpaceUVAdjust(float4 uv, float4 scaleAndOffset)
{
    return float4(UnityStereoScreenSpaceUVAdjustInternal(uv.xy, scaleAndOffset), UnityStereoScreenSpaceUVAdjustInternal(uv.zw, scaleAndOffset));
}