[maxvertexcount(NumVerts)]
void ShaderName ( PrimitiveType DataType Name [ NumElements ], inout StreamOutputObject )
{
}
| PrimitiveType | Num | |
|---|
| point | 1 | Point list |
| line | 2 | Line list or line strip |
| triangle | 3 | Triangle list or triangle strip |
| lineadj | 4 | Line list with adjacency or line strip with adjacency |
| triangleadj | 6 | Triangle list with adjacency or triangle strip with adjacency |
| StreamOutputObject | |
|---|
| PointStream<T> | A sequence of point primitives |
| LineStream<T> | A sequence of line primitives |
| TriangleStream<T> | A sequence of triangle primitives |
#pragma vertex vert
#pragma fragment frag
#pragma geometry geom
struct FromVS
{
float4 positionOS : POSITION
}
struct VStoGS
{
float4 positionOS : SV_POSITION
}
struct GStoFS
{
float4 positionCS : SV_POSITION
}
VStoGS vert(FromVS IN)
{
}
[maxvertexcount(3)] // 최대 얼마나 많이 vertex를 추가할 것인가.
void geom(triangle float4 IN[3] : SV_POSITION, uint pid : SV_PrimitiveID, inout TriangleStream<GStoFS> STREAM)
void geom(triangle VStoGS IN[3], uint pid : SV_PrimitiveID, inout TriangleStream<GStoFS> STREAM)
{
GStoFS OUT1;
GStoFS OUT2;
GStoFS OUT3;
STREAM.Append(OUT1);
STREAM.Append(OUT2);
STREAM.Append(OUT3);
// https://docs.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-so-restartstrip
// Ends the current primitive strip and starts a new strip
STREAM.RestartStrip();
}
half4 frag(GStoFS IN) : SV_Target
{
}