public void PushGlobalParams(HDCamera camera, CommandBuffer cmd)
{
if (preset == VolumetricLightingPreset.Off)
{
return;
}
HomogeneousFog globalFogComponent = HomogeneousFog.GetGlobalFogComponent();
// TODO: may want to cache these results somewhere.
VolumeProperties globalFogProperties = (globalFogComponent != null) ? globalFogComponent.volumeParameters.GetProperties()
: VolumeProperties.GetNeutralVolumeProperties();
cmd.SetGlobalVector(HDShaderIDs._GlobalFog_Scattering, globalFogProperties.scattering);
cmd.SetGlobalFloat(HDShaderIDs._GlobalFog_Extinction, globalFogProperties.extinction);
cmd.SetGlobalFloat(HDShaderIDs._GlobalFog_Asymmetry, globalFogComponent != null ? globalFogComponent.volumeParameters.asymmetry : 0);
int w = 0, h = 0, d = 0;
Vector2 scale = ComputeVBufferResolutionAndScale(preset, (int)camera.screenSize.x, (int)camera.screenSize.y, ref w, ref h, ref d);
VBuffer vBuffer = FindVBuffer(camera.GetViewID());
Debug.Assert(vBuffer != null);
cmd.SetGlobalVector(HDShaderIDs._VBufferResolution, new Vector4(w, h, 1.0f / w, 1.0f / h));
cmd.SetGlobalVector(HDShaderIDs._VBufferScaleAndSliceCount, new Vector4(scale.x, scale.y, d, 1.0f / d));
cmd.SetGlobalVector(HDShaderIDs._VBufferDepthEncodingParams, ComputeLogarithmicDepthEncodingParams(m_VBufferNearPlane, m_VBufferFarPlane, k_LogScale));
cmd.SetGlobalVector(HDShaderIDs._VBufferDepthDecodingParams, ComputeLogarithmicDepthDecodingParams(m_VBufferNearPlane, m_VBufferFarPlane, k_LogScale));
cmd.SetGlobalTexture(HDShaderIDs._VBufferLighting, vBuffer.GetLightingIntegralBuffer());
}
public VolumeProperties GetProperties()
{
VolumeProperties properties = new VolumeProperties();
properties.scattering = GetScatteringCoefficient();
properties.extinction = GetExtinctionCoefficient();
return(properties);
}
public float extinction; // [0, 1], prefer sRGB
public static VolumeProperties GetNeutralVolumeProperties()
{
VolumeProperties properties = new VolumeProperties();
properties.scattering = Vector3.zero;
properties.extinction = 0;
return(properties);
}
public void SetVolumetricLightingData(HDCamera camera, CommandBuffer cmd)
{
HomogeneousFog globalFogComponent = GetGlobalFogComponent();
// TODO: may want to cache these results somewhere.
VolumeProperties globalFogProperties = (globalFogComponent != null) ? globalFogComponent.volumeParameters.GetProperties()
: VolumeProperties.GetNeutralVolumeProperties();
cmd.SetGlobalVector(HDShaderIDs._GlobalFog_Scattering, globalFogProperties.scattering);
cmd.SetGlobalFloat(HDShaderIDs._GlobalFog_Extinction, globalFogProperties.extinction);
int w = 0, h = 0, d = 0;
Vector2 scale = ComputeVBufferResolutionAndScale(camera.screenSize.x, camera.screenSize.y, ref w, ref h, ref d);
int viewId = camera.camera.GetInstanceID();
int viewOffset = ViewOffsetFromViewId(viewId);
Debug.Assert(viewOffset >= 0 && viewOffset < 8);
cmd.SetGlobalVector(HDShaderIDs._VBufferResolution, new Vector4(w, h, 1.0f / w, 1.0f / h));
cmd.SetGlobalVector(HDShaderIDs._VBufferScaleAndSliceCount, new Vector4(scale.x, scale.y, d, 1.0f / d));
cmd.SetGlobalVector(HDShaderIDs._VBufferDepthEncodingParams, ComputeLogarithmicDepthEncodingParams(m_VBufferNearPlane, m_VBufferFarPlane));
cmd.SetGlobalTexture(HDShaderIDs._VBufferLighting, GetVBufferLightingIntegral(viewOffset));
}