public bool ContainsVolume(DensityVolume volume) => m_Volumes.Contains(volume);
DensityVolumeList PrepareVisibleDensityVolumeList(HDCamera hdCamera, CommandBuffer cmd, float time)
{
DensityVolumeList densityVolumes = new DensityVolumeList();
if (!hdCamera.frameSettings.IsEnabled(FrameSettingsField.Volumetrics))
{
return(densityVolumes);
}
var visualEnvironment = VolumeManager.instance.stack.GetComponent <VisualEnvironment>();
if (visualEnvironment.fogType.value != FogType.Volumetric)
{
return(densityVolumes);
}
using (new ProfilingSample(cmd, "Prepare Visible Density Volume List"))
{
Vector3 camPosition = hdCamera.camera.transform.position;
Vector3 camOffset = Vector3.zero;// World-origin-relative
if (ShaderConfig.s_CameraRelativeRendering != 0)
{
camOffset = camPosition; // Camera-relative
}
m_VisibleVolumeBounds.Clear();
m_VisibleVolumeData.Clear();
// Collect all visible finite volume data, and upload it to the GPU.
var volumes = DensityVolumeManager.manager.PrepareDensityVolumeData(cmd, hdCamera.camera, time);
for (int i = 0; i < Math.Min(volumes.Count, k_MaxVisibleVolumeCount); i++)
{
DensityVolume volume = volumes[i];
// TODO: cache these?
var obb = new OrientedBBox(Matrix4x4.TRS(volume.transform.position, volume.transform.rotation, volume.parameters.size));
// Handle camera-relative rendering.
obb.center -= camOffset;
// Frustum cull on the CPU for now. TODO: do it on the GPU.
// TODO: account for custom near and far planes of the V-Buffer's frustum.
// It's typically much shorter (along the Z axis) than the camera's frustum.
if (GeometryUtils.Overlap(obb, hdCamera.frustum, 6, 8))
{
// TODO: cache these?
var data = volume.parameters.ConvertToEngineData();
m_VisibleVolumeBounds.Add(obb);
m_VisibleVolumeData.Add(data);
}
}
m_VisibleVolumeBoundsBuffer.SetData(m_VisibleVolumeBounds);
m_VisibleVolumeDataBuffer.SetData(m_VisibleVolumeData);
// Fill the struct with pointers in order to share the data with the light loop.
densityVolumes.bounds = m_VisibleVolumeBounds;
densityVolumes.density = m_VisibleVolumeData;
return(densityVolumes);
}
}