SV_Position in hlsl geometry shader

[AndreasFT]

I am currently writing a geometry shader to create stencil volume shadows but I am quite stuck on the following error.

Not all elements of SV_Position were written.

Apparently I am not setting the position correctly? But I can’t wrap my head around what I doing wrong.

Shader: https://ghostbin.com/paste/arznb

[tonfilm]

your geometry shader seems to take the wrong data type as input:

your vertex shader:
VS_OUTPUT MainVS(VS_INPUT input)

your geometry shader:
void ShadowGenerator(triangleadj VS_INPUT vertices[6], inout TriangleStream<VS_OUTPUT> triStream)

should probably take VS_OUTPUT as input…?

[antokhio]

SV_Position, is a projected pixel position you have to write there result of mul (pos, mul (tW,tVP)) basically