<cat>Code.Shader</cat> <title>Constant Buffers</title> # What are constant buffers Constant buffer or "cbuffers" as known by HLSL is a buffer/struct which is stored in GPU memory and can be accessed within your shader. Once the file is included you should be able to access the cbuffer like a regular variable within your shader. An example of its usage can be seen below: ``` VS⤶ COMMON⤶ { #include "common/shared.hlsl" // Contains PerViewConstantBuffer_t⤶ }⤶ ⤶ VS⤶ {⤶ #include "common/vertex.hlsl" #include "common.fxc" // Contains PerViewConstantBuffer_t⤶ // // Main // PixelInput MainVs( INSTANCED_SHADER_PARAMS( VS_INPUT i ) ) { PixelInput o = ProcessVertex( i ); o.vPositionWs.z += sin(g_flTime) * 5.0f; // wiggle return FinalizeVertex( o ); } } ``` ⤶ ## BakedLightingConstantBuffer_t⤶ ⤶ Usage: `#include "baked_lighting_constants.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | float4 | g_vLightmapUvScale | |⤶ ⤶ # Built-in constant buffer⤶ ## PerViewConstantBuffer_t Usage: `#include "common.fxc"`⤶ Usage: `#include "common/shared.hlsl"`⤶ | Type | Field | Note | |------|-------|------| | float4x4 | g_matWorldToProjection | | | float4x4 | g_matProjectionToWorld | | | float4x4 | g_matWorldToView | | | float4x4 | g_matViewToProjection | | | float4 | g_vInvProjRow3 | | | float4 | g_vClipPlane0 | | | float | g_flToneMapScalarLinear | | | float | g_flLightMapScalar | | | float | g_flEnvMapScalar | | | float | g_flToneMapScalarGamma | | | float3 | g_vCameraPositionWs | The world position of the camera | | float | g_flViewportMinZ | | | float3 | g_vCameraDirWs | The current camera direction | | float | g_flViewportMaxZ | | | float3 | g_vCameraUpDirWs | | | float | g_flTime | The time since the client has connected | | float3 | g_vDepthPsToVsConversion | | | float | g_flNearPlane | NearZ | | float | g_flFarPlane | FarZ | | float | g_flLightBinnerFarPlane | | | float2 | g_vInvViewportSize | | | float2 | g_vViewportToGBufferRatio | | | float2 | g_vMorphTextureAtlasSize | | | float4 | g_vInvGBufferSize | | | float | g_flOOTransformTextureWidth | | | float | g_flOOTransformTextureHeight | | | float2 | g_vViewportOffset | | | float2 | g_vViewportSize | | | float2 | g_vRenderTargetSize | | | float | g_flFogBlendToBackground | | | float | g_flHenyeyGreensteinCoeff | | | float3 | g_vFogColor | | | float | g_flNegFogStartOverFogRange | | | float | g_flInvFogRange | | | float | g_flFogMaxDensity | | | float | g_flFogExponent | | | float | g_flMod2xIdentity | | | float2 | g_bRoughnessParams | | | bool | g_bUseRoughnessCone | | | bool | g_bUseRoughnessEllipse | | | float | g_bStereoEnabled | | | float | g_flStereoCameraIndex | | | float3 | g_vMiddleEyePositionWs | | | float | g_flPad2 | Padding for alignment, unused | | float4x4 | g_matWorldToProjectionMultiview[ 2 ] | | | float4 | g_vCameraPositionWsMultiview[ 2 ] | | | float4 | g_vFrameBufferCopyInvSizeAndUvScale | | | float4 | g_vCameraAngles | | | float4 | g_vWorldToCameraOffset | | | float4 | g_vWorldToCameraOffsetMultiview[ 2 ] | | | float4 | g_vPerViewConstantExtraData0 | | | float4 | g_vPerViewConstantExtraData1 | | | float4 | g_vPerViewConstantExtraData2 | | | float4 | g_vPerViewConstantExtraData3 | | | float4x4 | m_matPrevProjectionToWorld | | ## PerViewLightingConstantBuffer_t⤶ Usage: `#include "common.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | float | g_flInvPointLightTextureWidth | |⤶ | float | g_flInvSpotLightTextureWidth | |⤶ | float | g_flInvLightTransformTextureWidth | |⤶ | float | g_flInvLightTextureHeight | |⤶ | float4 | g_vLightBinCounts | |⤶ | float2 | g_vLowResDeferredLightingTextureDim | |⤶ | float2 | g_vLowResDeferredLightingTextureInvDim | |⤶ | float3 | g_vToolsAmbientLighting | |⤶ | float | g_flSSAOEnabled | |⤶ | float3 | g_vIrradAtlasInvSize | |⤶ | float | g_flIrradGlobalLightingFactor | |⤶ | float4 | g_vGlobalLightingSHRed | |⤶ | float4 | g_vGlobalLightingSHGreen | |⤶ | float4 | g_vGlobalLightingSHBlue | |⤶ | float3 | g_vRayleighScatteringCoeff | |⤶ | float | g_flMieScatteringEccentricity | |⤶ | float3 | g_vMieScatteringCoeff | |⤶ | float | g_flMieForwardScatteringRatio | |⤶ | float3 | g_vSpecularCubeMapScale | |⤶ | float | g_flDefaultEnvMapIndex | |⤶ | float4 | g_vLightCookieSheetSequenceAndSizes | |⤶ | float3 | g_vLpvBoxMinCascade0 | |⤶ | float | g_flLpvBrightnessScale | |⤶ | float3 | g_vLpvInvBoxDimCascade0 | |⤶ | float2 | g_vLpvInvCoeffTextureDim | |⤶ ⤶ ## PerLayerConstantBuffer_t⤶ ⤶ Usage: `#include "common.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | float4 | g_vWireframeColor | The wireframe color for the current rendering layer(mat_wireframe N) |⤶ ⤶ ## PerBatchLightProbeVolumeConstantBuffer_t⤶ ⤶ Usage: `#include "light_probe_volume.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | float4x3 | g_matLightProbeVolumeWorldToLocal | |⤶ | float4 | g_vLightProbeVolumeLayer0TextureMin | |⤶ | float4 | g_vLightProbeVolumeLayer0TextureMax | |⤶ | float4 | g_vLightProbeVolumeColor | |⤶ ⤶ ## MSAASampleOffsetConstantBuffer_t⤶ ⤶ Usage: `#include "msaa_offsets.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | float4 | g_vMSAASampleOffsets[16] | |⤶ | uint | g_nMSAASampleCount | |⤶ ⤶ ## ReflectionMapDescriptor_t⤶ ⤶ Usage: `#include "reflection.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | float4x4 | g_matReflectionWorldToProjection | |⤶ | float4 | g_vReflectionPlane | |⤶ | float4 | g_vReflectionRenderTargetRectangle | |⤶ ⤶ ## SFMLightsConstantBuffer_t⤶ ⤶ Usage: `#include "sfm_lighting_nocombos.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | float | g_SFMLight_Count | |⤶ | float | g_SFMLight_VolumetricOffset | |⤶ | float | g_SFMLight_PadZ | |⤶ | float | g_SFMLight_PadW | |⤶ | float2 | g_SFMLight_ShadowSampleDelta0 | |⤶ | float2 | g_SFMLight_ShadowSampleDelta1 | |⤶ | float2 | g_SFMLight_ShadowSampleDelta2 | |⤶ | float2 | g_SFMLight_ShadowSampleDelta3 | |⤶ | float4 | g_SFMLight_Position_Roundness[ 32 ] | |⤶ | float4 | g_SFMLight_Direction_ShadowFilterSize[ 32 ] | |⤶ | float4 | g_SFMLight_Color_ShadowTexIndex[ 32 ] | |⤶ | float4 | g_SFMLight_Attenuation_CookieTexIndex[ 32 ] | |⤶ | float4 | g_SFMLight_DepthParams_SpotFalloff[ 32 ] | |⤶ | float4 | g_SFMLight_GoboTexCoords[ 32 ] | |⤶ | float4 | g_SFMLight_PadXYZ_AmbientIntensity[ 32 ] | |⤶ | float4x4 | g_SFMLight_ViewProj[ 32 ] | |⤶ ⤶ ⤶ ## SkyConstantBuffer_t⤶ ⤶ Usage: `#include "sky.fxc"`⤶ ## PerViewConstantBufferVR_t⤶ Usage: `#include "common/shared.hlsl"`⤶ | Type | Field | Note | |------|-------|------| | float4x3 | g_matSkyOsToWs | Convert from Sky Object Space to Sky World Space |⤶ | float4x3 | g_matSkyWsToOs | Convert from Sky World Space to Sky Object Space |⤶ ⤶ ## SunLightShaderParamsCB⤶ ⤶ Usage: `#include "sun_shadowing.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | float4 | g_vSunLightColor | Current sun color |⤶ | float3 | g_vSunLightDir | Current sun direction |⤶ | float | g_flSunNormalizedRadius | |⤶ | float | g_flSunShadowingInvShadowTextureWidth | |⤶ | float | g_flSunShadowingInvShadowTextureHeight | |⤶ | float | g_flSunShadowingHalfInvShadowTextureWidth | |⤶ | float | g_flSunShadowingHalfInvShadowTextureHeight | |⤶ | float | g_flSunShadowingShadowTextureWidth | |⤶ | float | g_flSunShadowingShadowTextureHeight | |⤶ | float | g_flSunShadowingSplitLerpFactorBase | |⤶ | float | g_flSunShadowingSplitLerpFactorInvRange | |⤶ | float | g_flSunShadowingZLerpFactorBase | |⤶ | float | g_flSunShadowingZLerpFactorRange | |⤶ | float4x4 | g_matWorldToShadowTexMatrices[4] | |⤶ | float4 | g_vCascadeAtlasUVOffsets[4] | |⤶ | float4 | g_flCascadeViewShadowBiasScales[4] | |⤶ | int | g_nSunShadowCascadeCount | |⤶ ⤶ ⤶ ## PerViewConstantBufferVR_t⤶ ⤶ Usage: `#include "vr_common.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | bool | g_bVolumetricFogEnabled | | | bool | g_bGradientFogEnabled | | | bool | g_bCubemapFogEnabled | | | bool | g_bSphericalVignetteEnabled | | | bool | g_bAmbientOcclusionProxiesEnabled | | | float4 | g_vAoProxyDownres | | | float | g_flExcitationAmount | Xen animations | | float | g_flDepressionAmount | Xen animations | | float4 | g_vWindDirection | Current wind direction | | float | g_flWindSpeed | Current wind speed | | float4 | g_vInteractionProjectionOrigin | | | float4 | g_vInteractionVolumeInvExtents | | | float4 | g_vInteractionTriggerVolumeInvMins | | | float4 | g_vInteractionTriggerVolumeWorldToVolumeScale | | | float4 | g_vGradientFogBiasAndScale | | | float4 | m_vGradientFogExponents | | | float4 | g_vGradientFogColor_Opacity | | | float4 | g_vGradientFogCullingParams | | | float | g_flCubeFogOffset | | | float | g_flCubeFogScale | | | float | g_flCubeFogBias | | | float | g_flCubeFogExponent | | | float | g_flCubeFogHeightOffset | | | float | g_flCubeFogHeightScale | | | float | g_flCubeFogHeightExponent | | | float | g_flCubeMapSizeLog2 | | | float4x4 | g_matvCubeFogSkyWsToOs | | | float4 | g_vCubeFogCullingParams | | | float4 | g_vSphericalVignetteBiasAndScale | | | float4 | g_vSphericalVignetteOrigin_Exponent | | | float4 | g_vSphericalVignetteColor_Opacity | | | float | g_flVolFogNearClipPlane | | | float | g_flVolFogClipPlaneRange | | | float4 | g_vVolFogDitherScaleBias | | | float4 | g_vVolFogPostWorldToFrustumScale | | | float4 | g_vVolFogPostWorldToFrustumBias | | | float4x4 | g_mVolFogFromWorld[ 2 ] | | | float4 | g_vHighPrecisionLightingOffsetWs | |⤶ ⤶ ## HighQualityShadowsConstantBuffer_t⤶ ⤶ Usage: `#include "vr_lighting.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | int4 | g_nHighQualityShadowsCount | |⤶ | int4 | g_vHighQualityShadowsIndices[4] | |⤶ | float4 | g_vHighQualityLightSize[4] | |⤶ | float4x4 | g_matHighQualityWorldToShadow[4] | |⤶ | float4 | g_vHighQualityLightPosition[4] | |⤶ | float4 | g_vHighQualityShadowRegion | |⤶ ⤶ ## PerViewLightingConstantBufferVr_t⤶ ⤶ Usage: `#include "vr_per_view_lighting_constants.fxc"`⤶ ⤶ | Type | Field | Note |⤶ |------|-------|------|⤶ | int | g_nNumLights | Amount of lights to iterate within the other fields, (g_vLightParams, g_vLightPosition_flInvRadius, etc) |⤶ | int4 | g_vMultiviewData | |⤶ | int | g_nNumViews | |⤶ | int | g_nNumSubiews | |⤶ | int | g_nNumTotalMultiviews | |⤶ | int4 | g_vMultiviewViewAndSubviewIndexArray[4] | |⤶ | int4 | g_vLightParams[128] | |⤶ | float4 | g_vLightPosition_flInvRadius[128] | |⤶ | float4 | g_vLightColor[128] | |⤶ | float4 | g_vLightFalloffParams[128] | |⤶ | float4 | g_vLightDirection[128] | |⤶ | float4 | g_vSpotLightInnerOuterConeCosines[128] | |⤶ | float4x4 | g_matWorldToShadow[128] | |⤶ | float4 | g_vShadow3x3PCFTermC0 | |⤶ | float4 | g_vShadow3x3PCFTermC1 | |⤶ | float4 | g_vShadow3x3PCFTermC2 | |⤶ | float4 | g_vShadow3x3PCFTermC3 | |⤶ | float4 | g_vToolsAmbientLightingVr | |⤶ | float4 | g_vLightBinCameraPositionWs | |⤶ | float4 | g_vLightBinCameraDirWs | |⤶ | float | g_flLightBinCameraNearZ | |⤶ | float | g_flLightBinCameraFarZ | |⤶ | float4x4 | g_matLightBinViewProj | |⤶ | float4 | g_vMultiviewScaleBias[4] | |⤶ | float4 | g_vMultiviewClipEdge0[4] | |⤶ | float4 | g_vMultiviewClipEdge1[4] | |⤶ | float | g_flNumViews | |⤶ | float | g_flOoNumViews | |⤶ | float | g_flNumSubiews | |⤶ | float | g_flOoNumSubviews | |⤶ | float | g_flNumTotalMultiviews | |⤶ | float | g_flOoNumTotalMultiviews | |⤶ | float | g_flVrLuminanceOffset | |⤶ | float | g_flVrLuminanceScale | |⤶ | float | g_fDisableDirectionalLightmaps | |⤶ | float4 | g_vScreenSpaceDitherParams | |⤶ | float4x4 | g_matWorldToLightCookie[128] | |⤶ | float4 | g_vSpotLightShadowOffsetScale[128] | |⤶ | float4 | g_vSpotLightShadowBounds[128] | |⤶ | float4 | g_vLightProjectiveDepthToLinearDepth[128] | |⤶ | float4 | g_vUnlitShadowColor | |⤶ | float4 | g_vAmbientLightingSH[3] | |⤶ | float4 | g_vLightIndexData[128] | |⤶ | float4 | g_vSunLightIndexData | |⤶ | float4 | g_vAmbientOcclusionProxyLightPositions[4] | |⤶ | float4 | g_vAmbientOcclusionProxyLightConeAngles | |⤶ | float4 | g_vAmbientOcclusionProxyLightStrengths | |⤶ | float4 | g_vAmbientOcclusionProxyAmbientStrength | |⤶ | float4 | g_vCubemapNormalizationParams | || float4 | g_vHighPrecisionLightingOffsetWs | |