How do I pass a value from the vertex shader as a flat variable in Slang and HLSL? - Stack Overflow

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In my GLSL code in my vertex shader I have:

layout(location = 2) out flat uint out_uniform_index;
layout(location = 3) out vec2 out_pos_in_chamfer_box;
layout(location = 4) out flat vec2 out_chamfer_box_size;

In GLSL I think integers are flat automatically, but for floating point types you must label it specifically. I'm trying to use Slang and I don't know how to do this as it doesn't seem to have a "flat" keyword qualifier. Since Slang's syntax is related to HLSL I'm wondering if HLSL also doesn't have this qualifier. How do I do this in Slang?

In my GLSL code in my vertex shader I have:

layout(location = 2) out flat uint out_uniform_index;
layout(location = 3) out vec2 out_pos_in_chamfer_box;
layout(location = 4) out flat vec2 out_chamfer_box_size;

In GLSL I think integers are flat automatically, but for floating point types you must label it specifically. I'm trying to use Slang and I don't know how to do this as it doesn't seem to have a "flat" keyword qualifier. Since Slang's syntax is related to HLSL I'm wondering if HLSL also doesn't have this qualifier. How do I do this in Slang?

• shader
• hlsl
• slang-shader-language

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1 Answer 1

Sorted by: Reset to default 1

You can use nointerpolation keyword, from doc can be found here: https://learn.microsoft/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-struct

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