koobas.hobune.stream
tessellation shader dx9
hi all helpful ppl. what i would like to do is: i have a simple tessellation shader runs perfect on dx11. now i wish if i could make it run on dx9 without the tessellation. i've tried the
CGPROGRAM
#ifdef SHADER_API_D3D11
#pragma surface surf NoLight alpha:fade vertex:dispNone tessellate:tessEdge tessphong:_Phong nolightmap
#include "Tessellation.cginc"
#pragma target 5.0
#else
#pragma surface surf NoLight alpha:fade nolightmap
#pragma target 3.0
#endif
but it just ignores the second pragma surf and compile to dx11, so the shader does nothing on dx9 (Shader warning in 'Shieldeffect': Duplicate #pragma surface found, ignoring: #pragma surface surf NoLight alpha:fade nolightmap at line 43 (on ))
id like to know if it could be done with multipasses or multi_compile. any idea welcome :) thanks
You'll need to write two subshaders for DX11 and DX9 versions. Unity will pick right subshader version for your target platform
Something like that:
Shader{
Properties { ... }
CGINCLUDE
float4 YourTessellateFunction (appdata v0, appdata v1, appdata v2){...}
void YourSurfFunction(Input IN, inout SurfaceOutput o){...}
ENDCG
SubShader // DX11 version
{
Tags { "RenderType"="Opaque" }
LOD 300
CGPROGRAM
#pragma surface YourSurfFunction Lambert tessellate:YourTessellateFunction
ENDCG
}
SubShader // DX9 version
{
Tags { "RenderType"="Opaque" }
LOD 200
CGPROGRAM
#pragma surface YourSurfFunction Lambert
ENDCG
}
}
You'll need to write two subshaders for DX11 and DX9. Unity will pick right version for your target platform.
Something like that:
Shader{
Properties { ... }
CGINCLUDE
float4 YourTessellateFunction (appdata v0, appdata v1, appdata v2){...}
void YourSurfFunction(Input IN, inout SurfaceOutput o){...}
ENDCG
SubShader //DX11 version
{
Tags { "RenderType"="Opaque" }
LOD 300
CGPROGRAM
#pragma surface YourSurfFunction Lambert tessellate:YourTessellateFunction
ENDCG
}
SubShader //DX9 version
{
Tags { "RenderType"="Opaque" }
LOD 200
CGPROGRAM
#pragma surface YourSurfFunction Lambert
ENDCG
}
}
