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Some spot light shadowmap debugging

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This commit is contained in:
Robert Beckebans 2022-03-10 19:42:59 +01:00
parent 28c756b1d7
commit 529d91f611
2 changed files with 67 additions and 7 deletions
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31
neo/renderer/RenderBackend.cpp
View file

@ -3385,7 +3385,13 @@ void idRenderBackend::ShadowMapPass( const drawSurf_t* drawSurfs, const viewLigh
lightProjectionMatrix[0 * 4 + 2] = 0.0f;
lightProjectionMatrix[1 * 4 + 2] = 0.0f;
lightProjectionMatrix[2 * 4 + 2] = -0.999f; // adjust value to prevent imprecision issues
#if 0 //defined( USE_NVRHI )
// the D3D clip space Z is in range [0,1] instead of [-1,1]
lightProjectionMatrix[3 * 4 + 2] = -zNear;
#else
lightProjectionMatrix[3 * 4 + 2] = -2.0f * zNear;
#endif
lightProjectionMatrix[0 * 4 + 3] = 0.0f;
lightProjectionMatrix[1 * 4 + 3] = 0.0f;
@ -3404,6 +3410,18 @@ void idRenderBackend::ShadowMapPass( const drawSurf_t* drawSurfs, const viewLigh
shadowV[0] = lightViewRenderMatrix;
shadowP[0] = lightProjectionRenderMatrix;
#if defined( USE_NVRHI )
// Calculate alternate matrix that maps to [0, 1] UV space instead of [-1, 1] clip space
ALIGNTYPE16 const idRenderMatrix matClipToUvzw(
0.5f, 0.0f, 0.0f, 0.5f,
0.0f, -0.5f, 0.0f, 0.5f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f
);
idRenderMatrix::Multiply( matClipToUvzw, lightProjectionRenderMatrix, shadowP[0] );
#endif
}
@ -3411,14 +3429,13 @@ void idRenderBackend::ShadowMapPass( const drawSurf_t* drawSurfs, const viewLigh
#if defined( USE_NVRHI )
if( side < 0 )
{
side = 0;
globalFramebuffers.shadowFBO[vLight->shadowLOD][0]->Bind();
}
if( side > 5 )
else
{
side = 5;
globalFramebuffers.shadowFBO[vLight->shadowLOD][side]->Bind();
}
globalFramebuffers.shadowFBO[vLight->shadowLOD][side]->Bind();
GL_ViewportAndScissor( 0, 0, shadowMapResolutions[vLight->shadowLOD], shadowMapResolutions[vLight->shadowLOD] );
@ -3478,9 +3495,11 @@ void idRenderBackend::ShadowMapPass( const drawSurf_t* drawSurfs, const viewLigh
if( drawSurf->space != currentSpace )
{
// model -> world
idRenderMatrix modelRenderMatrix;
idRenderMatrix::Transpose( *( idRenderMatrix* )drawSurf->space->modelMatrix, modelRenderMatrix );
// world -> light = light camera view of model in Doom
idRenderMatrix modelToLightRenderMatrix;
idRenderMatrix::Multiply( lightViewRenderMatrix, modelRenderMatrix, modelToLightRenderMatrix );
@ -3489,6 +3508,7 @@ void idRenderBackend::ShadowMapPass( const drawSurf_t* drawSurfs, const viewLigh
if( vLight->parallel )
{
// cascaded sun light shadowmap
idRenderMatrix MVP;
idRenderMatrix::Multiply( renderMatrix_clipSpaceToWindowSpace, clipMVP, MVP );
@ -3496,7 +3516,7 @@ void idRenderBackend::ShadowMapPass( const drawSurf_t* drawSurfs, const viewLigh
}
else if( side < 0 )
{
// from OpenGL view space to OpenGL NDC ( -1 : 1 in XYZ )
// spot light
idRenderMatrix MVP;
idRenderMatrix::Multiply( renderMatrix_windowSpaceToClipSpace, clipMVP, MVP );
@ -3504,6 +3524,7 @@ void idRenderBackend::ShadowMapPass( const drawSurf_t* drawSurfs, const viewLigh
}
else
{
// point light
RB_SetMVP( clipMVP );
}

43
neo/shaders/builtin/lighting/interactionSM.ps.hlsl
View file

@ -204,6 +204,7 @@ void main( PS_IN fragment, out PS_OUT result )
return;
#endif
// rpShadowMatrices contain model -> world -> shadow transformation for evaluation
float4 shadowMatrixX = rpShadowMatrices[ int ( shadowIndex * 4 + 0 ) ];
float4 shadowMatrixY = rpShadowMatrices[ int ( shadowIndex * 4 + 1 ) ];
float4 shadowMatrixZ = rpShadowMatrices[ int ( shadowIndex * 4 + 2 ) ];
@ -211,6 +212,7 @@ void main( PS_IN fragment, out PS_OUT result )
float4 modelPosition = float4( fragment.texcoord7.xyz, 1.0 );
float4 shadowTexcoord;
shadowTexcoord.x = dot4( modelPosition, shadowMatrixX );
shadowTexcoord.y = dot4( modelPosition, shadowMatrixY );
@ -309,7 +311,7 @@ void main( PS_IN fragment, out PS_OUT result )
shadow *= stepSize;
#elif 1
#elif 0
#if 0
@ -391,9 +393,46 @@ void main( PS_IN fragment, out PS_OUT result )
#endif
#else
float shadow = idtex2Dproj( samp1, t_ShadowMapArray, shadowTexcoord );
float3 uvzShadow;
uvzShadow.x = shadowTexcoord.x;
uvzShadow.y = shadowTexcoord.y;
uvzShadow.z = shadowTexcoord.w;
float shadow = t_ShadowMapArray.SampleCmpLevelZero( samp2, uvzShadow, shadowTexcoord.z );
#if 1
if( shadowIndex == 0 )
{
result.color = float4( 1.0, 0.0, 0.0, 1.0 );
}
else if( shadowIndex == 1 )
{
result.color = float4( 0.0, 1.0, 0.0, 1.0 );
}
else if( shadowIndex == 2 )
{
result.color = float4( 0.0, 0.0, 1.0, 1.0 );
}
else if( shadowIndex == 3 )
{
result.color = float4( 1.0, 1.0, 0.0, 1.0 );
}
else if( shadowIndex == 4 )
{
result.color = float4( 1.0, 0.0, 1.0, 1.0 );
}
else if( shadowIndex == 5 )
{
result.color = float4( 0.0, 1.0, 1.0, 1.0 );
}
result.color.rgb *= shadow;
return;
#endif
#endif
half3 halfAngleVector = normalize( lightVector + viewVector );
half hdotN = clamp( dot3( halfAngleVector, localNormal ), 0.0, 1.0 );