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Topic: D3D11 Pixel Shader (Read 105 times) |
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Ric
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D3D11 Pixel Shader
« Thread started on: Dec 23rd, 2017, 10:06pm » |
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Posted this on the other forum and Richard advised me that this forum would be a better place to post. So here goes.
Code:cbuffer ConstantBuffer : register( b0 )
{
matrix World;
matrix View;
matrix Projection;
float4 vLightDir;
float4 vLightColor;
float4 ambient;
//float4 vOutputColor;
}
//--------------------------------------------------------------------------------------
struct VS_INPUT
{
float4 Pos : POSITION;
float3 Norm : NORMAL;
float4 Color : COLOR;
};
struct PS_INPUT
{
float4 Pos : SV_POSITION;
float3 Norm : TEXCOORD0;
float4 Color : COLOR;
};
//--------------------------------------------------------------------------------------
// Vertex Shader
//--------------------------------------------------------------------------------------
PS_INPUT VS( VS_INPUT input )
{
float4 normal;
float4 diffuseColor = 0;
PS_INPUT output = (PS_INPUT)0;
output.Pos = mul( input.Pos, World );
output.Pos = mul( output.Pos, View );
output.Pos = mul( output.Pos, Projection );
normal = mul(input.Norm, World);
diffuseColor += dot((float3)vLightDir, normal);
diffuseColor += 1;
diffuseColor /= 2;
diffuseColor * (1 - ambient);
diffuseColor *= input.Color;
diffuseColor += ambient;
output.Color = diffuseColor * vLightColor;
return output;
}
//--------------------------------------------------------------------------------------
// Pixel Shader
//--------------------------------------------------------------------------------------
float4 PS( PS_INPUT input) : SV_Target
{
return input.Color;
}
I have managed to convert the vertex shader to sensible light effect, but no matter what I do the pixel shader returns a fault. I woud like to be able to use color.alpha to affect the other 3 components (why are they x,y,x,w and not r,g,b,a?), if I use input.color.w, or just input.color it fails, WHY?
I have modified the simple vertex to
Code: DIM SimpleVertex{Pos{}=XMFLOAT3{},Normal{}=XMFLOAT3{},Color{}=XMFLOAT4{}}
DIM layout{(2)} = D3D11_INPUT_ELEMENT_DESC{}
sn0$ = "POSITION" + CHR$(0)
layout{(0)}.SemanticName% = !^sn0$
layout{(0)}.Format% = DXGI_FORMAT_R32G32B32_FLOAT
layout{(0)}.AlignedByteOffset% = 0
layout{(0)}.InputSlotClass% = D3D11_INPUT_PER_VERTEX_DATA
sn1$ = "NORMAL" + CHR$(0)
layout{(1)}.SemanticName% = !^sn1$
layout{(1)}.Format% = DXGI_FORMAT_R32G32B32_FLOAT
layout{(1)}.AlignedByteOffset% = 12
layout{(1)}.InputSlotClass% = D3D11_INPUT_PER_VERTEX_DATA
sn2$ = "COLOR" + CHR$(0)
layout{(2)}.SemanticName% = !^sn2$
layout{(2)}.Format% = DXGI_FORMAT_R32G32B32A32_FLOAT
layout{(2)}.AlignedByteOffset% = 24
layout{(2)}.InputSlotClass% = D3D11_INPUT_PER_VERTEX_DATA
numElements% = DIM(layout{()},1) + 1
Can anybody help?
Richard eluded to possible help from Michael Hutton, can you help Michael?
Ric
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It's always possible, but not necessarily how you first thought. Chin up and try again.
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David Williams
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meh
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Re: D3D11 Pixel Shader
« Reply #1 on: Dec 24th, 2017, 11:07pm » |
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I'm sorry I can't help, but I hope someone else can.
I would be surprised if you hear from Michael Hutton on this forum because he left the BB4W 'scene' a few years ago, which was quite a loss for some of us. I don't know if he still monitors this forum at all, perhaps on an occasional basis. Last time I heard he had migrated over to PureBasic.
David.
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Ric
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Re: D3D11 Pixel Shader
« Reply #2 on: Dec 25th, 2017, 09:54am » |
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Thanks David, this could be a blow to using d3d11! I was hoping to change my 3d object project to d3d but maybe not yet.
Regards Ric
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It's always possible, but not necessarily how you first thought. Chin up and try again.
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