命名空间
namespace	vulkan

类
struct	VgBackend
	Opaque backend state for one virtual-geometry renderer. Owned by VirtualGeometryRenderer; allocated/freed by the active backend. 更多...

struct	VgCluster
	CPU-side processed cluster (before packing into VgGpuCluster). 更多...

struct	VgGpuCluster
	GPU-mirrored cluster node layout (std430, matches shaders/vg_*.comp). Exactly 4 x uvec4 per cluster: 更多...

struct	VgUniforms

class	VirtualGeometry
	Virtual-geometry module — Nanite-style virtualized geometry rendering on top of the active Graphics backend (Vulkan). See docs/dev/VIRTUAL_GEOMETRY.md. 更多...

struct	VirtualGeometryAsset
	Fully processed virtual-geometry asset (CPU representation). Produced by Builder from a Mesh; uploaded to GPU SSBOs by the backend. 更多...

class	VirtualGeometryBuilder
	CPU preprocessor that builds a Nanite-style hierarchical cluster DAG from a triangle mesh: 更多...

class	VirtualGeometryRenderer
	A virtual-geometry renderer: preprocesses a mesh into a cluster DAG, uploads it to the GPU, then each frame runs GPU-driven culling + a software rasterizer into a visibility buffer. 更多...

函数
int	selectClusters (const VirtualGeometryAsset &asset, float dist, float projScale, float errorPx, std::vector< std::uint32_t > &outSelected)
	CPU reference implementation of the GPU cluster-DAG LOD selection (mirrors shaders/vg_cull.comp).

void	lodHistogram (const VirtualGeometryAsset &asset, const std::vector< std::uint32_t > &selected, std::vector< int > &perLevelCount)
	Per-LOD-level counts of the selected clusters (size = maxLod+1).

	Module_IMPL (VirtualGeometry, new VirtualGeometry())

void	vgCreate (VgBackend &be)

void	vgDestroy (VgBackend &be)

void	vgUpload (VgBackend &be, const VirtualGeometryAsset &asset)

void	vgUploadUniforms (VgBackend &be, const VgUniforms &u)

void	vgReset (VgBackend &be, int visibleCapacity)

int	vgUpdate (VgBackend &be, int clusterCount, int visibleCapacity, int viewW, int viewH)

bool	vgReadPixels (VgBackend &be, std::vector< uint32_t > &out)

函数说明

◆ lodHistogram()

void eve::virtualgeometry::lodHistogram	(	const VirtualGeometryAsset &	asset,
		const std::vector< std::uint32_t > &	selected,
		std::vector< int > &	perLevelCount
	)

Per-LOD-level counts of the selected clusters (size = maxLod+1).

在文件 LodSelection.cpp 第 31 行定义.

引用了 c , 以及 eve::virtualgeometry::VirtualGeometryAsset::clusters.

◆ Module_IMPL()

eve::virtualgeometry::Module_IMPL	(	VirtualGeometry	,
		new	VirtualGeometry()
	)

◆ selectClusters()

int eve::virtualgeometry::selectClusters	(	const VirtualGeometryAsset &	asset,
		float	dist,
		float	projScale,
		float	errorPx,
		std::vector< std::uint32_t > &	outSelected
	)

CPU reference implementation of the GPU cluster-DAG LOD selection (mirrors shaders/vg_cull.comp).

A cluster is selected iff it is the coarsest ancestor whose screen-space geometric error is within errorPx (or a leaf when no ancestor is fine enough). Combined with screenP > errorPx, this emits exactly one cluster per DAG branch (no overlaps, no gaps), so as the camera moves the visible LOD transitions continuously from fine (near) to coarse (far).

screenError(cluster) = errorR * projScale / dist

在文件 LodSelection.cpp 第 8 行定义.

引用了 c, eve::virtualgeometry::VirtualGeometryAsset::clusters, d , 以及 eve::virtualgeometry::VgCluster::errorR.