mrieggeramzn
8c6900eb06
* Adding directional light shadow bias Signed-off-by: mrieggeramzn <mriegger@amazon.com> * Adding normal offset bias to the directional shadow maps Signed-off-by: mrieggeramzn <mriegger@amazon.com> * not time yet for this Signed-off-by: mrieggeramzn <mriegger@amazon.com> * small comment fix Signed-off-by: mrieggeramzn <mriegger@amazon.com> * fixing tabs Signed-off-by: mrieggeramzn <mriegger@amazon.com>
100 lines
2.6 KiB
Plaintext
100 lines
2.6 KiB
Plaintext
/*
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* Copyright (c) Contributors to the Open 3D Engine Project.
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* For complete copyright and license terms please see the LICENSE at the root of this distribution.
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*
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* SPDX-License-Identifier: Apache-2.0 OR MIT
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*
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*/
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#include <viewsrg.srgi>
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struct VSInput
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{
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float3 m_position : POSITION;
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float3 m_normal : NORMAL; // Needed for some shadow filtering algorithms
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};
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struct VSOutput
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{
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float4 m_position : SV_Position;
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float3 m_worldPosition : TEXCOORD0;
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float3 m_worldNormal : NORMAL;
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float3 m_shadowCoords[ViewSrg::MaxCascadeCount] : TEXCOORD1;
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};
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struct PSOutput
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{
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float4 m_color : SV_Target;
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};
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ShaderResourceGroup MaterialSrg : SRG_PerMaterial
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{
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float m_opacity;
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}
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#include <Atom/Features/PBR/DefaultObjectSrg.azsli>
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#include <Atom/Features/PBR/ForwardPassSrg.azsli>
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#include <Atom/Features/Shadow/DirectionalLightShadow.azsli>
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#include <Atom/RPI/ShaderResourceGroups/DefaultDrawSrg.azsli>
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//! Shades the entire geometry with the shadow color, not just what's in shadow. For debugging.
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option bool o_shadeAll = false;
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VSOutput ShadowCatcherVS(VSInput IN)
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{
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VSOutput OUT;
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float3 worldPosition = mul(ObjectSrg::GetWorldMatrix(), float4(IN.m_position, 1.0)).xyz;
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OUT.m_worldPosition = worldPosition;
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OUT.m_position = mul(ViewSrg::m_viewProjectionMatrix, float4(OUT.m_worldPosition, 1.0));
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OUT.m_worldNormal = normalize(mul(ObjectSrg::GetWorldMatrixInverseTranspose(), IN.m_normal));
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// [GFX TODO][ATOM-2012] Add support for multiple directional light shadows
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DirectionalLightShadow::GetShadowCoords(
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ViewSrg::m_shadowIndexDirectionalLight,
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worldPosition,
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OUT.m_worldNormal,
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OUT.m_shadowCoords);
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return OUT;
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}
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PSOutput ShadowCatcherPS(VSOutput IN)
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{
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PSOutput OUT;
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DirectionalLightShadow::DebugInfo debugInfo;
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float litRatio = DirectionalLightShadow::GetVisibility(
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ViewSrg::m_shadowIndexDirectionalLight,
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IN.m_shadowCoords,
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IN.m_worldNormal,
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debugInfo);
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if (o_shadeAll)
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{
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litRatio = 0.0f;
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}
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if (ViewSrg::m_directionalLightShadows[ViewSrg::m_shadowIndexDirectionalLight].m_debugFlags &
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ViewSrg::DirectionalLightShadowDebugColoringBitMask)
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{
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float3 debugColor = float3(1,1,1) * litRatio * 0.5f;
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debugColor = DirectionalLightShadow::AddDebugColoring(
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debugColor,
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ViewSrg::m_shadowIndexDirectionalLight,
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debugInfo);
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OUT.m_color.rgb = debugColor;
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OUT.m_color.a = 1;
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}
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else
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{
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OUT.m_color = float4(0, 0, 0, 1 - litRatio) * MaterialSrg::m_opacity;
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}
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return OUT;
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}
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