diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR.materialtype b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR.materialtype index cb66a987ae..954e01c592 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR.materialtype +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR.materialtype @@ -946,19 +946,6 @@ "type": "Bool", "defaultValue": false }, - { - "id": "factor", - "displayName": "Factor", - "description": "Strength factor for scaling the depth values", - "type": "Float", - "defaultValue": 0.0, - "min": 0.0, - "softMax": 0.1, - "connection": { - "type": "ShaderInput", - "id": "m_depthFactor" - } - }, { "id": "textureMap", "displayName": "Texture Map", @@ -981,6 +968,32 @@ "id": "m_parallaxUvIndex" } }, + { + "id": "factor", + "displayName": "Heightmap Scale", + "description": "The total height of the heightmap in local model units.", + "type": "Float", + "defaultValue": 0.0, + "min": 0.0, + "softMax": 0.1, + "connection": { + "type": "ShaderInput", + "id": "m_depthFactor" + } + }, + { + "id": "offset", + "displayName": "Offset", + "description": "Adjusts the overall displacement amount in local model units.", + "type": "Float", + "defaultValue": 0.0, + "softMin": -0.1, + "softMax": 0.1, + "connection": { + "type": "ShaderInput", + "id": "m_depthOffset" + } + }, { "id": "invert", "displayName": "Invert", @@ -1026,6 +1039,17 @@ "type": "ShaderOption", "id": "o_parallax_enablePixelDepthOffset" } + }, + { + "id": "showClipping", + "displayName": "Show Clipping", + "description": "Highlight areas where the heightmap is clipped by the mesh surface.", + "type": "Bool", + "defaultValue": false, + "connection": { + "type": "ShaderOption", + "id": "o_parallax_highlightClipping" + } } ], "subsurfaceScattering": [ @@ -1714,22 +1738,6 @@ "shaderOption": "o_emissive_useTexture" } }, - { - // See the comment above for details. - "type": "UseTexture", - "args": { - "textureProperty": "parallax.textureMap", - "dependentProperties": ["parallax.textureMapUv"], - "useTextureProperty": "parallax.enable", - "shaderTags": [ - "ForwardPass", - "ForwardPass_EDS", - "Shadowmap_WithPS", - "DepthPass_WithPS" - ], - "shaderOption": "o_parallax_feature_enabled" - } - }, { // See the comment above for details. "type": "UseTexture", @@ -1813,34 +1821,6 @@ ] } }, - { - // Controls visibility for properties in the editor. - // @param actions - a list of actions that are executed in order. visibility will be set when triggerProperty hits the triggerValue. - // @param affectedProperties - the properties that are affected by actions. - "type": "UpdatePropertyVisibility", - "args": { - "actions": [ - { - "triggerProperty": "parallax.enable", - "triggerValue": true, - "visibility": "Enabled" - }, - { - "triggerProperty": "parallax.enable", - "triggerValue": false, - "visibility": "Hidden" - } - ], - "affectedProperties": [ - "parallax.factor", - "parallax.textureMap", - "parallax.invert", - "parallax.algorithm", - "parallax.quality", - "parallax.pdo" - ] - } - }, { "type": "UpdatePropertyVisibility", "args": { @@ -2076,6 +2056,12 @@ ] } }, + { + "type": "Lua", + "args": { + "file": "StandardPBR_ParallaxState.lua" + } + }, { "type": "Lua", "args": { diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_DepthPass_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_DepthPass_WithPS.azsl index 81601860ed..5d6c0fafd8 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_DepthPass_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_DepthPass_WithPS.azsl @@ -90,30 +90,12 @@ PSDepthOutput MainPS(VSDepthOutput IN, bool isFrontFace : SV_IsFrontFace) float3 bitangents[UvSetCount] = { IN.m_bitangent.xyz, float3(0, 0, 0) }; PrepareGeneratedTangent(IN.m_normal, IN.m_worldPosition, isFrontFace, IN.m_uv, UvSetCount, tangents, bitangents, 1); - float3 tangent = tangents[MaterialSrg::m_parallaxUvIndex]; - float3 bitangent = bitangents[MaterialSrg::m_parallaxUvIndex]; - float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - - float3 tangentOffset = GetParallaxOffset( MaterialSrg::m_depthFactor, - IN.m_uv[MaterialSrg::m_parallaxUvIndex], - ViewSrg::m_worldPosition.xyz - IN.m_worldPosition, - tangent, - bitangent, - IN.m_normal, - uvMatrix); - - PixelDepthOffset pdo = CalcPixelDepthOffset(MaterialSrg::m_depthFactor, - tangentOffset, - IN.m_worldPosition, - tangent, - bitangent, - IN.m_normal, - uvMatrixInverse, - ObjectSrg::GetWorldMatrix(), - ViewSrg::m_viewProjectionMatrix); - OUT.m_depth = pdo.m_depth; + + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, MaterialSrg::m_depthOffset, + ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, + IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, OUT.m_depth); } return OUT; } diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_ForwardPass.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_ForwardPass.azsl index 27d7d7f65c..7d50cbf69b 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_ForwardPass.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_ForwardPass.azsl @@ -115,6 +115,8 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float // ------- Depth & Parallax ------- depth = IN.m_position.z; + + bool displacementIsClipped = false; // Parallax mapping's non uniform uv transformations break screen space subsurface scattering, disable it when subsurface scatteirng is enabled if(!o_enableSubsurfaceScattering && o_parallax_feature_enabled && o_useDepthMap) @@ -126,9 +128,9 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, MaterialSrg::m_depthOffset, ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, - IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, depth); + IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, depth, displacementIsClipped); // Apply second part of the offset to the detail UV (see comment above) IN.m_detailUv[MaterialSrg::m_parallaxUvIndex] -= IN.m_uv[MaterialSrg::m_parallaxUvIndex]; @@ -186,6 +188,11 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float float3 baseColor = GetDetailedBaseColorInput( MaterialSrg::m_baseColorMap, MaterialSrg::m_sampler, baseColorUv, o_baseColor_useTexture, MaterialSrg::m_baseColor, MaterialSrg::m_baseColorFactor, o_baseColorTextureBlendMode, MaterialSrg::m_detail_baseColor_texture, MaterialSrg::m_sampler, detailUv, o_detail_baseColor_useTexture, detailLayerBaseColorFactor); + + if(o_parallax_highlightClipping && displacementIsClipped) + { + baseColor = lerp(baseColor, float3(1.0,0.0,1.0), 0.5); + } // ------- Metallic ------- diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Shadowmap_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Shadowmap_WithPS.azsl index f1021e354b..e344886c4b 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Shadowmap_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/EnhancedPBR_Shadowmap_WithPS.azsl @@ -98,35 +98,21 @@ PSDepthOutput MainPS(VertexOutput IN, bool isFrontFace : SV_IsFrontFace) if(o_parallax_feature_enabled && o_parallax_enablePixelDepthOffset) { + static const float ShadowMapDepthBias = 0.000001; + // We support two UV streams, but only a single stream of tangent/bitangent. So for UV[1+] we generated the tangent/bitangent in screen-space. float3 tangents[UvSetCount] = { IN.m_tangent.xyz, float3(0, 0, 0) }; float3 bitangents[UvSetCount] = { IN.m_bitangent.xyz, float3(0, 0, 0) }; PrepareGeneratedTangent(IN.m_normal, IN.m_worldPosition, isFrontFace, IN.m_uv, UvSetCount, tangents, bitangents, 1); - float3 tangent = tangents[MaterialSrg::m_parallaxUvIndex]; - float3 bitangent = bitangents[MaterialSrg::m_parallaxUvIndex]; - float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - float3 tangentOffset = GetParallaxOffset( MaterialSrg::m_depthFactor, - IN.m_uv[MaterialSrg::m_parallaxUvIndex], - dirToCamera, - tangent, - bitangent, - IN.m_normal, - uvMatrix); + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, MaterialSrg::m_depthOffset, + ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, + IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, OUT.m_depth); - PixelDepthOffset pdo = CalcPixelDepthOffset(MaterialSrg::m_depthFactor, - tangentOffset, - IN.m_worldPosition, - tangent, - bitangent, - IN.m_normal, - uvMatrixInverse, - ObjectSrg::GetWorldMatrix(), - ViewSrg::m_viewProjectionMatrix); - OUT.m_depth = pdo.m_depth; + OUT.m_depth += ShadowMapDepthBias; } return OUT; } diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/MaterialInputs/ParallaxInput.azsli b/Gems/Atom/Feature/Common/Assets/Materials/Types/MaterialInputs/ParallaxInput.azsli index edee4c3c07..ab601429e8 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/MaterialInputs/ParallaxInput.azsli +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/MaterialInputs/ParallaxInput.azsli @@ -24,16 +24,15 @@ #define COMMON_SRG_INPUTS_PARALLAX(prefix) \ Texture2D prefix##m_depthMap; \ float prefix##m_depthFactor; \ +float prefix##m_depthOffset; \ bool prefix##m_depthInverted; #define COMMON_OPTIONS_PARALLAX(prefix) \ option bool prefix##o_useDepthMap; -option bool o_parallax_feature_enabled; - -void GetParallaxInput(float3 normal, float3 tangent, float3 bitangent, float depthFactor, +void GetParallaxInput(float3 normal, float3 tangent, float3 bitangent, float depthFactor, float depthOffset, float4x4 objectWorldMatrix, float3x3 uvMatrix, float3x3 uvMatrixInverse, - inout float2 uv, inout float3 worldPosition, inout float depth) + inout float2 uv, inout float3 worldPosition, inout float depth, out bool isClipped) { if(o_parallax_feature_enabled) { @@ -49,20 +48,22 @@ void GetParallaxInput(float3 normal, float3 tangent, float3 bitangent, float dep dirToCamera = ViewSrg::m_worldPosition.xyz - worldPosition; } - float3 tangentOffset = GetParallaxOffset( depthFactor, - uv, - dirToCamera, - tangent, - bitangent, - normal, - uvMatrix); + ParallaxOffset tangentOffset = GetParallaxOffset( depthFactor, + depthOffset, + uv, + dirToCamera, + tangent, + bitangent, + normal, + uvMatrix); - uv += tangentOffset.xy; + uv += tangentOffset.m_offsetTS.xy; + isClipped = tangentOffset.m_isClipped; if(o_parallax_enablePixelDepthOffset) { PixelDepthOffset pdo = CalcPixelDepthOffset(depthFactor, - tangentOffset, + tangentOffset.m_offsetTS, worldPosition, tangent, bitangent, @@ -70,9 +71,20 @@ void GetParallaxInput(float3 normal, float3 tangent, float3 bitangent, float dep uvMatrixInverse, objectWorldMatrix, ViewSrg::m_viewProjectionMatrix); + depth = pdo.m_depth; + worldPosition = pdo.m_worldPosition; } + } } +void GetParallaxInput(float3 normal, float3 tangent, float3 bitangent, float depthFactor, float depthOffset, + float4x4 objectWorldMatrix, float3x3 uvMatrix, float3x3 uvMatrixInverse, + inout float2 uv, inout float3 worldPosition, inout float depth) +{ + bool isClipped; + GetParallaxInput(normal, tangent, bitangent, depthFactor, depthOffset, objectWorldMatrix, uvMatrix, uvMatrixInverse, uv, worldPosition, depth, isClipped); +} + diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_DepthPass_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_DepthPass_WithPS.azsl index 074b9dce26..8e25292e9c 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_DepthPass_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_DepthPass_WithPS.azsl @@ -126,7 +126,8 @@ PSDepthOutput MainPS(VSDepthOutput IN, bool isFrontFace : SV_IsFrontFace) float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_parallaxMainDepthFactor, + float parallaxMainDepthOffset = 0.0; + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_parallaxMainDepthFactor, parallaxMainDepthOffset, ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, depth); diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl index a7338188a2..05a40d0f9d 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_ForwardPass.azsl @@ -163,8 +163,9 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - - GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_parallaxMainDepthFactor, + + float parallaxMainDepthOffset = 0.0; + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_parallaxMainDepthFactor, parallaxMainDepthOffset, ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, depth); diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_Shadowmap_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_Shadowmap_WithPS.azsl index 1274e07f7d..0c9c186a11 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_Shadowmap_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardMultilayerPBR_Shadowmap_WithPS.azsl @@ -124,8 +124,9 @@ PSDepthOutput MainPS(VertexOutput IN, bool isFrontFace : SV_IsFrontFace) float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - - GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_parallaxMainDepthFactor, + + float parallaxMainDepthOffset = 0.0; + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_parallaxMainDepthFactor, parallaxMainDepthOffset, ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, depth); diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR.materialtype b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR.materialtype index e071a793a5..a74ceb1783 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR.materialtype +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR.materialtype @@ -910,8 +910,8 @@ }, { "id": "factor", - "displayName": "Factor", - "description": "Strength factor for scaling the depth values", + "displayName": "Heightmap Scale", + "description": "The total height of the heightmap in local model units.", "type": "Float", "defaultValue": 0.0, "min": 0.0, @@ -921,6 +921,19 @@ "id": "m_depthFactor" } }, + { + "id": "offset", + "displayName": "Offset", + "description": "Adjusts the overall displacement amount in local model units.", + "type": "Float", + "defaultValue": 0.0, + "softMin": -0.1, + "softMax": 0.1, + "connection": { + "type": "ShaderInput", + "id": "m_depthOffset" + } + }, { "id": "invert", "displayName": "Invert", @@ -966,6 +979,17 @@ "type": "ShaderOption", "id": "o_parallax_enablePixelDepthOffset" } + }, + { + "id": "showClipping", + "displayName": "Show Clipping", + "description": "Highlight areas where the heightmap is clipped by the mesh surface.", + "type": "Bool", + "defaultValue": false, + "connection": { + "type": "ShaderOption", + "id": "o_parallax_highlightClipping" + } } ], "subsurfaceScattering": [ diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_DepthPass_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_DepthPass_WithPS.azsl index 2e64f5102a..3c04e9b391 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_DepthPass_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_DepthPass_WithPS.azsl @@ -91,31 +91,15 @@ PSDepthOutput MainPS(VSDepthOutput IN, bool isFrontFace : SV_IsFrontFace) float3 tangents[UvSetCount] = { IN.m_tangent.xyz, float3(0, 0, 0) }; float3 bitangents[UvSetCount] = { IN.m_bitangent.xyz, float3(0, 0, 0) }; PrepareGeneratedTangent(IN.m_normal, IN.m_worldPosition, isFrontFace, IN.m_uv, UvSetCount, tangents, bitangents, 1); - - float3 tangent = tangents[MaterialSrg::m_parallaxUvIndex]; - float3 bitangent = bitangents[MaterialSrg::m_parallaxUvIndex]; - + float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - - float3 tangentOffset = GetParallaxOffset( MaterialSrg::m_depthFactor, - IN.m_uv[MaterialSrg::m_parallaxUvIndex], - ViewSrg::m_worldPosition.xyz - IN.m_worldPosition, - tangent, - bitangent, - IN.m_normal, - uvMatrix); - - PixelDepthOffset pdo = CalcPixelDepthOffset(MaterialSrg::m_depthFactor, - tangentOffset, - IN.m_worldPosition, - tangent, - bitangent, - IN.m_normal, - uvMatrixInverse, - ObjectSrg::GetWorldMatrix(), - ViewSrg::m_viewProjectionMatrix); - OUT.m_depth = pdo.m_depth; + + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, MaterialSrg::m_depthOffset, + ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, + IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, OUT.m_depth); } + + return OUT; } diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ForwardPass.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ForwardPass.azsl index 4c3da2b7d0..d55b865a27 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ForwardPass.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ForwardPass.azsl @@ -106,15 +106,18 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float // ------- Depth & Parallax ------- depth = IN.m_position.z; + + bool displacementIsClipped = false; // Parallax mapping's non uniform uv transformations break screen space subsurface scattering, disable it when subsurface scatteirng is enabled if(!o_enableSubsurfaceScattering && o_parallax_feature_enabled && o_useDepthMap) { + float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, MaterialSrg::m_depthOffset, ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, - IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, depth); + IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, depth, displacementIsClipped); // Adjust directional light shadow coorinates for parallax correction if(o_parallax_enablePixelDepthOffset) @@ -150,6 +153,11 @@ PbrLightingOutput ForwardPassPS_Common(VSOutput IN, bool isFrontFace, out float float3 sampledColor = GetBaseColorInput(MaterialSrg::m_baseColorMap, MaterialSrg::m_sampler, baseColorUv, MaterialSrg::m_baseColor.rgb, o_baseColor_useTexture); float3 baseColor = BlendBaseColor(sampledColor, MaterialSrg::m_baseColor.rgb, MaterialSrg::m_baseColorFactor, o_baseColorTextureBlendMode, o_baseColor_useTexture); + if(o_parallax_highlightClipping && displacementIsClipped) + { + baseColor = lerp(baseColor, float3(1.0,0.0,1.0), 0.5); + } + // ------- Metallic ------- float metallic = 0; diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ParallaxState.lua b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ParallaxState.lua index bf1b59616a..0287e1105e 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ParallaxState.lua +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_ParallaxState.lua @@ -41,8 +41,10 @@ function ProcessEditor(context) if(not enable or textureMap == nil) then visibility = MaterialPropertyVisibility_Hidden end - + context:SetMaterialPropertyVisibility("parallax.factor", visibility) + context:SetMaterialPropertyVisibility("parallax.offset", visibility) + context:SetMaterialPropertyVisibility("parallax.showClipping", visibility) context:SetMaterialPropertyVisibility("parallax.invert", visibility) context:SetMaterialPropertyVisibility("parallax.algorithm", visibility) context:SetMaterialPropertyVisibility("parallax.quality", visibility) diff --git a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Shadowmap_WithPS.azsl b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Shadowmap_WithPS.azsl index 4decbcd0df..8f33b4cec6 100644 --- a/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Shadowmap_WithPS.azsl +++ b/Gems/Atom/Feature/Common/Assets/Materials/Types/StandardPBR_Shadowmap_WithPS.azsl @@ -107,31 +107,14 @@ PSDepthOutput MainPS(VertexOutput IN, bool isFrontFace : SV_IsFrontFace) float3 bitangents[UvSetCount] = { IN.m_bitangent.xyz, float3(0, 0, 0) }; PrepareGeneratedTangent(IN.m_normal, IN.m_worldPosition, isFrontFace, IN.m_uv, UvSetCount, tangents, bitangents, 1); - float3 tangent = tangents[MaterialSrg::m_parallaxUvIndex]; - float3 bitangent = bitangents[MaterialSrg::m_parallaxUvIndex]; - float3x3 uvMatrix = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrix : CreateIdentity3x3(); float3x3 uvMatrixInverse = MaterialSrg::m_parallaxUvIndex == 0 ? MaterialSrg::m_uvMatrixInverse : CreateIdentity3x3(); - float3 tangentOffset = GetParallaxOffset( MaterialSrg::m_depthFactor, - IN.m_uv[MaterialSrg::m_parallaxUvIndex], - dirToCamera, - tangent, - bitangent, - IN.m_normal, - uvMatrix); + GetParallaxInput(IN.m_normal, tangents[MaterialSrg::m_parallaxUvIndex], bitangents[MaterialSrg::m_parallaxUvIndex], MaterialSrg::m_depthFactor, MaterialSrg::m_depthOffset, + ObjectSrg::GetWorldMatrix(), uvMatrix, uvMatrixInverse, + IN.m_uv[MaterialSrg::m_parallaxUvIndex], IN.m_worldPosition, OUT.m_depth); - PixelDepthOffset pdo = CalcPixelDepthOffset(MaterialSrg::m_depthFactor, - tangentOffset, - IN.m_worldPosition, - tangent, - bitangent, - IN.m_normal, - uvMatrixInverse, - ObjectSrg::GetWorldMatrix(), - ViewSrg::m_viewProjectionMatrix); - - OUT.m_depth = pdo.m_depth + ShadowMapDepthBias; + OUT.m_depth += ShadowMapDepthBias; } return OUT; } diff --git a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/ParallaxMapping.azsli b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/ParallaxMapping.azsli index 8a6b5c479a..8027443f9a 100644 --- a/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/ParallaxMapping.azsli +++ b/Gems/Atom/Feature/Common/Assets/ShaderLib/Atom/Features/ParallaxMapping.azsli @@ -18,6 +18,9 @@ option bool o_parallax_enablePixelDepthOffset; option enum class ParallaxAlgorithm {Basic, Steep, POM, Relief, Contact} o_parallax_algorithm; option enum class ParallaxQuality {Low, Medium, High, Ultra} o_parallax_quality; + +option bool o_parallax_feature_enabled; +option bool o_parallax_highlightClipping; option bool o_parallax_shadow; //! The client shader must define this function. @@ -34,23 +37,49 @@ float SampleDepthOrHeightMap(bool isHeightmap, Texture2D map, sampler mapSampler return abs((isHeightmap * 1.0) - map.SampleGrad(mapSampler, uv, uv_ddx, uv_ddy).r); } +float GetClampedDepth(float minSampledDepth, float2 uv, float2 uv_ddx, float2 uv_ddy) +{ + float sampledDepthValue = GetDepth(uv, uv_ddx, uv_ddy); + sampledDepthValue = max(sampledDepthValue, minSampledDepth); + return sampledDepthValue; +} + +struct ParallaxOffset +{ + float3 m_offsetTS; //!< represents the intersection point relative to the geometry surface, in tangent space. + bool m_isClipped; //!< Indicates whether the result is being clipped by the geometry surface, mainly for debug rendering. Only set when o_parallax_highlightClipping is true. +}; + // dirToCameraTS should be in tangent space and normalized // From Reat-Time Rendering 3rd edition, p.192 -float3 BasicParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraTS) +ParallaxOffset BasicParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraTS) { // the amount to shift float2 delta = dirToCameraTS.xy * GetDepth(uv, ddx_fine(uv), ddy_fine(uv)) * depthFactor; - float3 offset = float3(0,0,0); - offset.xy -= delta; - return offset; + ParallaxOffset result; + + result.m_offsetTS = float3(0,0,0); + result.m_offsetTS.xy -= delta; + result.m_isClipped = false; + return result; } -// dirToCameraTS and dirToLightTS should be in tangent space and normalized -// Adapt from CryEngine shader shadelib.cfi and POM function in https://github.com/a-riccardi/shader-toy +// Performs ray intersection against a surface with a heightmap. +// Adapted from CryEngine shader shadelib.cfi and POM function in https://github.com/a-riccardi/shader-toy // check https://github.com/UPBGE/blender/issues/1009 for more details. -float3 AdvancedParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraTS, float3 dirToLightTS, int numSteps, inout float parallaxShadowAttenuation) +// @param depthFactor - scales the heightmap in tangent space units (which normally ends up being world units). +// @param depthOffset - offsets the heighmap up or down in tangent space units (which normally ends up being world units). +// @param uv - the UV coordinates on the surface, where the search will begin, used to sample the heightmap. +// @param dirToCameraTS - normalized direction to the camera, in tangent space. +// @param dirToLightTS - normalized direction to a light source, in tangent space, for self-shadowing (if enabled via o_parallax_shadow). +// @param numSteps - the number of steps to take when marching along the ray searching for intersection. +// @param parallaxShadowAttenuation - returns a factor for attenuating a light source, for self-shadowing (if enabled via o_parallax_shadow). +ParallaxOffset AdvancedParallaxMapping(float depthFactor, float depthOffset, float2 uv, float3 dirToCameraTS, float3 dirToLightTS, int numSteps, inout float parallaxShadowAttenuation) { + ParallaxOffset result; + result.m_isClipped = false; + float dirToCameraZInverse = 1.0 / dirToCameraTS.z; float step = 1.0 / numSteps; float currentStep = 0.0; @@ -60,22 +89,41 @@ float3 AdvancedParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraT float2 ddx_uv = ddx_fine(uv); float2 ddy_uv = ddy_fine(uv); + + // This is the relative position at which we begin searching for intersection. + // It is adjusted according to the depthOffset, raising or lowering the whole surface by depthOffset units. + float3 parallaxOffset = dirToCameraTS.xyz * dirToCameraZInverse * depthOffset; + + // Note that depthOffset can raise the heightmap toward (and potentially above) the surface of the mesh. + // We will clamp the heightmap samples to prevent displacements that lie above the surface, which would cause various + // problems especially when PDO is enabled, like parallax surfaces clipping through foreground geometry, and parallax + // surfaces disappearing at low angles. + float minSampledDepth = depthOffset / depthFactor; + minSampledDepth = clamp(minSampledDepth, 0, 1); - float currentSample = GetDepth(uv, ddx_uv, ddy_uv); + // Get an initial heightmap sample to start the intersection search, starting at our initial parallaxOffset position. + float currentSample = GetClampedDepth(minSampledDepth, uv + parallaxOffset.xy, ddx_uv, ddy_uv); float prevSample; - float3 parallaxOffset = float3(0,0,0); + + // Note that when depthOffset > 0, we could actually narrow the search so that instead of going through the entire [0,1] range + // of the heightmap, we could go through the range [minSampledDepth,1]. This would give more accurate results and fewer artifacts + // in case where depthOffset is significant. But for the sake of simplicity we currently search the whole range in all cases. - // find the intersect step + // Do a basic search for the intersect step while(currentSample > currentStep) { currentStep += step; parallaxOffset += delta; + prevSample = currentSample; - currentSample = GetDepth(uv + parallaxOffset.xy, ddx_uv, ddy_uv); + currentSample = GetClampedDepth(minSampledDepth, uv + parallaxOffset.xy, ddx_uv, ddy_uv); } + // Depending on the algorithm, we refine the result of the above search switch(o_parallax_algorithm) { + case ParallaxAlgorithm::Steep: + break; // This algorithm just relies on the course intersection test loop above case ParallaxAlgorithm::POM: { if(currentStep > 0.0) @@ -108,7 +156,7 @@ float3 AdvancedParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraT parallaxOffset += reliefDelta * depthSign; currentStep += reliefStep * depthSign; - currentSample = GetDepth(uv + parallaxOffset.xy, ddx_uv, ddy_uv); + currentSample = GetClampedDepth(minSampledDepth, uv + parallaxOffset.xy, ddx_uv, ddy_uv); } } break; @@ -136,7 +184,7 @@ float3 AdvancedParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraT parallaxOffset += adjustedDelta; prevSample = currentSample; - currentSample = GetDepth(uv + parallaxOffset.xy, ddx_uv, ddy_uv); + currentSample = GetClampedDepth(minSampledDepth, uv + parallaxOffset.xy, ddx_uv, ddy_uv); } } break; @@ -144,6 +192,23 @@ float3 AdvancedParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraT default: break; } + + // Even though we do a bunch of clamping above when calling GetClampedDepth(), there are still cases where the parallax offset + // can be noticeably above the surface and still needs to be clamped here. The main case is when depthFactor==0 and depthOffset>1. + if(parallaxOffset.z > 0.0) + { + result.m_isClipped = o_parallax_highlightClipping; + parallaxOffset = float3(0,0,0); + } + // Extra check to report whether the heightmap is clipped. Inaccuracies in the intersection search make it difficult to rely on + // parallaxOffset.z to determine whether clipping has occurred. The most accurate way to report clipping is to sample the + // heightmap one last time at the final adjusted UV. Since that's expensive, we only do it when the o_parallax_highlightClipping + // option is set. + else if (o_parallax_highlightClipping) + { + float sampledDepthValue = GetDepth(uv + parallaxOffset.xy, ddx_uv, ddy_uv); + result.m_isClipped = sampledDepthValue < minSampledDepth; + } if(o_parallax_shadow && any(dirToLightTS)) { @@ -168,7 +233,7 @@ float3 AdvancedParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraT } shadowUV += shadowDelta; - currentSample = GetDepth(shadowUV, ddx_uv, ddy_uv); + currentSample = GetClampedDepth(minSampledDepth, shadowUV, ddx_uv, ddy_uv); currentStep -= step; } @@ -181,12 +246,13 @@ float3 AdvancedParallaxMapping(float depthFactor, float2 uv, float3 dirToCameraT parallaxShadowAttenuation = 1; } } - - return parallaxOffset; + + result.m_offsetTS = parallaxOffset; + return result; } // return offset in tangent space -float3 CalculateParallaxOffset(float depthFactor, float2 uv, float3 dirToCameraTS, float3 dirToLightTS, inout float parallaxShadowAttenuation) +ParallaxOffset CalculateParallaxOffset(float depthFactor, float depthOffset, float2 uv, float3 dirToCameraTS, float3 dirToLightTS, inout float parallaxShadowAttenuation) { if(o_parallax_algorithm == ParallaxAlgorithm::Basic) { @@ -194,27 +260,34 @@ float3 CalculateParallaxOffset(float depthFactor, float2 uv, float3 dirToCameraT } else { - float3 parallaxOffset; + ParallaxOffset parallaxOffset; switch(o_parallax_quality) { case ParallaxQuality::Low: - parallaxOffset = AdvancedParallaxMapping(depthFactor, uv, dirToCameraTS, dirToLightTS, 16, parallaxShadowAttenuation); + parallaxOffset = AdvancedParallaxMapping(depthFactor, depthOffset, uv, dirToCameraTS, dirToLightTS, 16, parallaxShadowAttenuation); break; case ParallaxQuality::Medium: - parallaxOffset = AdvancedParallaxMapping(depthFactor, uv, dirToCameraTS, dirToLightTS, 32, parallaxShadowAttenuation); + parallaxOffset = AdvancedParallaxMapping(depthFactor, depthOffset, uv, dirToCameraTS, dirToLightTS, 32, parallaxShadowAttenuation); break; case ParallaxQuality::High: - parallaxOffset = AdvancedParallaxMapping(depthFactor, uv, dirToCameraTS, dirToLightTS, 64, parallaxShadowAttenuation); + parallaxOffset = AdvancedParallaxMapping(depthFactor, depthOffset, uv, dirToCameraTS, dirToLightTS, 64, parallaxShadowAttenuation); break; case ParallaxQuality::Ultra: - parallaxOffset = AdvancedParallaxMapping(depthFactor, uv, dirToCameraTS, dirToLightTS, 128, parallaxShadowAttenuation); + parallaxOffset = AdvancedParallaxMapping(depthFactor, depthOffset, uv, dirToCameraTS, dirToLightTS, 128, parallaxShadowAttenuation); break; } return parallaxOffset; } } -float3 GetParallaxOffset( float depthFactor, +// Performs ray intersection against a surface with a heightmap, to determine an offset amount required for a parallax effect. +// @param depthFactor - scales the heightmap in tangent space units (which normally ends up being world units). +// @param depthOffset - offsets the heighmap up or down in tangent space units (which normally ends up being world units). +// @param uv - the UV coordinates on the surface, where the search will begin, used to sample the heightmap. +// @param dirToCameraTS - normalized direction to the camera, in tangent space. +// @param dirToLightTS - normalized direction to a light source, in tangent space, for self-shadowing (if enabled via o_parallax_shadow). +ParallaxOffset GetParallaxOffset( float depthFactor, + float depthOffset, float2 uv, float3 dirToCameraWS, float3 tangentWS, @@ -236,7 +309,7 @@ float3 GetParallaxOffset( float depthFactor, float4 dirToCameraTransformed = mul(uv3DTransform, float4(dirToCameraTS, 0.0)); float dummy = 1; - return CalculateParallaxOffset(depthFactor, uv, normalize(dirToCameraTransformed.xyz), float3(0,0,0), dummy); + return CalculateParallaxOffset(depthFactor, depthOffset, uv, normalize(dirToCameraTransformed.xyz), float3(0,0,0), dummy); } struct PixelDepthOffset diff --git a/Gems/Atom/TestData/TestData/Materials/Types/AutoBrick_ForwardPass.azsl b/Gems/Atom/TestData/TestData/Materials/Types/AutoBrick_ForwardPass.azsl index 770da549d0..fd11d0d8cd 100644 --- a/Gems/Atom/TestData/TestData/Materials/Types/AutoBrick_ForwardPass.azsl +++ b/Gems/Atom/TestData/TestData/Materials/Types/AutoBrick_ForwardPass.azsl @@ -136,15 +136,18 @@ ForwardPassOutput AutoBrick_ForwardPassPS(VSOutput IN) 0,1,0, 0,0,1 }; - float3 tangentOffset = GetParallaxOffset( AutoBrickSrg::m_lineDepth, - IN.m_uv, - ViewSrg::m_worldPosition.xyz - IN.m_worldPosition, - IN.m_tangent, - IN.m_bitangent, - IN.m_normal, - identityUvMatrix); + float depthOffset = 0.0; + + ParallaxOffset tangentOffset = GetParallaxOffset( AutoBrickSrg::m_lineDepth, + depthOffset, + IN.m_uv, + ViewSrg::m_worldPosition.xyz - IN.m_worldPosition, + IN.m_tangent, + IN.m_bitangent, + IN.m_normal, + identityUvMatrix); - IN.m_uv += tangentOffset.xy; + IN.m_uv += tangentOffset.m_offsetTS.xy; float3 baseColor = float3(1,1,1); const float noise = AutoBrickSrg::m_noise.Sample(AutoBrickSrg::m_sampler, IN.m_uv).r;