TRANSFER_SHADOW and TRANSFER_SHADOW_CASTER_NORMALOFFSET in same cginc file results in error

Hi!

I have a cginc file (GeoSnap.cginc) set up to have multiple vertex functions like vert, vertSnap, vertShadow, vertShadowSnap, vertNormal, vertNormalSnap etc. The idea is that I could include this file in my shader and specify which vertex shader I wish to use by writing "#pragma vertex vert" or "#pragma vertex vertShadow" etc in my shader.

However when I try to do that I get the error:

Code (CSharp):

1. Shader error in 'Custom/Toon Shader Snap': unrecognized identifier 'SHADOW_COORDS' at Assets/Graphics/CGincFiles/Geometry/GeoSetup.cginc(21) (on d3d11)

Only for my shadows pass however, my normal pass compiles and workes as expected.

I guess my question is, what even is SHADOW_COORDS, V2F_SHADOW_CASTER, TRANSFER_SHADOW and TRANSFER_SHADOW_CASTER_NORMALOFFSET? They do not seem to work like normal functions given that they do not require a semicolon, nor variables since they are followed by opened and closed brackets.

Given that neither vert nor vertSnap is used for my custom ShadowCaster pass, only included, v2f should never be created, and therefore the compiler should not get mad about the SHADOW_COORDS(3) in v2f.

If I seperate vert from shadow from normal, the shader compiles... However I do not want to change the include file, only the #pragma vertex.

GeoSetup.cginc:

Code (CSharp):

1. struct appdata
2. {
3.     float4 vertex : POSITION;              
4.     float4 uv : TEXCOORD0;
5.     float3 normal : NORMAL;
6.     float3 worldPosition : TEXCOORD1;
7.     float4 screenPosition : TEXCOORD3;
8. };
9.  
10. // For Geometry
11. struct v2f
12. {
13.     float4 pos : SV_POSITION;
14.     float3 worldNormal : NORMAL;
15.     float2 uv : TEXCOORD0;
16.     float3 worldPosition : TEXCOORD1;
17.     float4 screenPosition : TEXCOORD2;
18.     // Macro found in Autolight.cginc. Declares a vector4
19.     // into the TEXCOORD3 semantic with varying precision
20.     // depending on platform target.
21.     SHADOW_COORDS(3)
22. };
23.  
24. // For Shadows
25. struct v2f_shadow
26. {
27.     V2F_SHADOW_CASTER;
28. };
29.  
30. // For Normal Replacement Shader
31. struct v2f_normal
32. {
33.     float4 pos : SV_POSITION;
34.     float3 viewNormal : NORMAL;
35. };

Geo.cginc:

Code (CSharp):

1. #include "/Assets/Graphics/CGincFiles/Geometry/GeoSetup.cginc"
2.  
3. v2f vert(appdata v)
4. {
5.     v2f o;
6.     o.pos = UnityObjectToClipPos(v.vertex);
7.     o.worldNormal = UnityObjectToWorldNormal(v.normal);
8.     o.worldPosition = mul(unity_ObjectToWorld, v.vertex);
9.     o.screenPosition = ComputeScreenPos(o.pos);
10.     o.uv = TRANSFORM_TEX(v.uv, _MainTex);
11.     // Defined in Autolight.cginc. Assigns the above shadow coordinate
12.     // by transforming the vertex from world space to shadow-map space.
13.     TRANSFER_SHADOW(o)
14.     return o;
15. }
16. v2f_shadow vertShadow(appdata v)
17. {
18.     v2f_shadow o;
19.     TRANSFER_SHADOW_CASTER_NORMALOFFSET(o)
20.     return o;
21. }
22.  
23. v2f_normal vertNormal(appdata v)
24. {
25.     v2f_normal o;
26.     o.pos = UnityObjectToClipPos(v.vertex);
27.     o.viewNormal = COMPUTE_VIEW_NORMAL;
28.     return o;
29. }

GeoSnap:

Code (CSharp):

1. #include "/Assets/Graphics/CGincFiles/Geometry/Geo.cginc"
2. #include "/Assets/Graphics/CGincFiles/Geometry/SnapSetup.cginc"
3.  
4. v2f vertSnap (appdata v)
5. {
6.     if (unity_OrthoParams.w == 0.0)
7.     {
8.         return vert(v);
9.     }
10.  
11.     // create v2f
12.     v2f o;
13.  
14.     // get vertex object snapped difference
15.     float4 m_vertexClipSnappedDiff = MainCameraClipSnappedDifference();
16.     float4 vertexWorldSnappedDiff = SnappedDifferenceWorld(m_vertexClipSnappedDiff);
17.     float4 vertexObjectSnappedDiff = SnappedDifferenceObject(vertexWorldSnappedDiff);
18.  
19.     // snap current vertex
20.     v.vertex += vertexObjectSnappedDiff;
21.  
22.     // get vertex world using now clipped vertex
23.     o.worldPosition = mul(unity_ObjectToWorld, v.vertex);
24.     // get vertex clip
25.     o.pos = UnityObjectToClipPos(v.vertex);
26.  
27.     // when you know how to snap rotation, worldnormal need to be accounted for! (https://forum.unity.com/threads/cancel-object-inspector-rotation-from-shader-but-keep-movement.758972/)
28.  
29.     o.worldNormal = UnityObjectToWorldNormal(v.normal);
30.     o.screenPosition = ComputeScreenPos(o.pos);
31.     o.uv = TRANSFORM_TEX(v.uv, _MainTex);
32.  
33.     // Defined in Autolight.cginc. Assigns the above shadow coordinate
34.     // by transforming the vertex from world space to shadow-map space.
35.     TRANSFER_SHADOW(o)
36.  
37.     //o.worldPosition = objectOriginWorld.xyz;
38.  
39.     return o;
40. }
41.  
42. v2f_shadow vertShadowSnap (appdata v)
43. {
44.     if (unity_OrthoParams.w == 0.0)
45.     {
46.         return vertShadow(v);
47.     }
48.  
49.     // create v2f_shadow
50.     v2f_shadow o;
51.  
52.     // get vertex object snapped difference
53.     float4 m_vertexClipSnappedDiff = MainCameraClipSnappedDifference();
54.     float4 vertexWorldSnappedDiff = SnappedDifferenceWorld(m_vertexClipSnappedDiff);
55.     float4 vertexObjectSnappedDiff = SnappedDifferenceObject(vertexWorldSnappedDiff);
56.  
57.     // snap current vertex
58.     v.vertex += vertexObjectSnappedDiff;
59.  
60.     // get vertex clip
61.     o.pos = UnityObjectToClipPos(v.vertex);
62.  
63.     // Defined in Autolight.cginc.
64.     TRANSFER_SHADOW_CASTER_NORMALOFFSET(o)
65.  
66.     return o;
67. }
68.  
69. v2f_normal vertNormalSnap (appdata v)
70. {
71.     if (unity_OrthoParams.w == 0.0)
72.     {
73.         return vertNormal(v);
74.     }
75.  
76.     // create v2f_normal
77.     v2f_normal o;
78.  
79.     // get vertex object snapped difference
80.     float4 m_vertexClipSnappedDiff = MainCameraClipSnappedDifference();
81.     float4 vertexWorldSnappedDiff = SnappedDifferenceWorld(m_vertexClipSnappedDiff);
82.     float4 vertexObjectSnappedDiff = SnappedDifferenceObject(vertexWorldSnappedDiff);
83.  
84.     // snap current vertex
85.     v.vertex += vertexObjectSnappedDiff;
86.  
87.     // get vertex clip
88.     o.pos = UnityObjectToClipPos(v.vertex);
89.  
90.     o.viewNormal = COMPUTE_VIEW_NORMAL;
91.  
92.     // Defined in Autolight.cginc.
93.     TRANSFER_SHADOW_CASTER_NORMALOFFSET(o)
94.  
95.     return o;
96. }