C# 클래스 Axiom.Core.ProgressiveMesh

Class for handling multiple levels of detail for a Mesh

This class reduces the complexity of the geometry it is given. This class is dedicated to reducing the number of triangles in a given mesh taking into account seams in both geometry and texture co-ordinates and meshes which have multiple frames. The primary use for this is generating LOD versions of Mesh objects, but it can be used by any geometry provider. The only limitation at the moment is that the provider uses a common vertex buffer for all LODs and one index buffer per LOD. Therefore at the moment this class can only handle indexed geometry. NB the interface of this class will certainly change when compiled vertex buffers are supported.

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공개 메소드들

메소드	설명
AddExtraVertexPositionBuffer ( VertexData vertexData ) : void	Adds an extra vertex position buffer. As well as the main vertex buffer, the client of this class may add extra versions of the vertex buffer which will also be taken into account when the cost of simplifying the mesh is taken into account. This is because the cost of simplifying an animated mesh cannot be calculated from just the reference position, multiple positions needs to be assessed in order to find the best simplification option. DO NOT pass write-only, unshadowed buffers to this method! They will not work. Pass only shadowed buffers, or better yet perform mesh reduction as an offline process using DefaultHardwareBufferManager to manage vertex buffers in system memory.
AddWorkingData ( VertexData vertexData, IndexData indexData ) : void	Internal method for building PMWorkingData from geometry data
BakeNewLOD ( IndexData indexData ) : void	Internal method builds an new LOD based on the current state
Build ( ushort numLevels, List lodFaceList ) : void
Build ( ushort numLevels, List lodFaceList, VertexReductionQuota quota ) : void
Build ( ushort numLevels, List lodFaceList, VertexReductionQuota quota, float reductionValue ) : void	Builds the progressive mesh with the specified number of levels.
Build ( ushort numLevels, List lodFaceList, float reductionValue ) : void
Collapse ( PMVertex src ) : void	Internal method, collapses vertex onto it's saved collapse target. This updates the working triangle list to drop a triangle and recalculates the edge collapse costs around the collapse target. This also updates all the working vertex lists for the relevant buffer.
ComputeAllCosts ( ) : void
ComputeEdgeCostAtVertex ( uint vertIndex ) : void
InitialiseEdgeCollapseCosts ( ) : void
ProgressiveMesh ( VertexData vertexData, IndexData indexData ) : System	Constructor, takes the geometry data and index buffer. DO NOT pass write-only, unshadowed buffers to this method! They will not work. Pass only shadowed buffers, or better yet perform mesh reduction as an offline process using DefaultHardwareBufferManager to manage vertex buffers in system memory.

비공개 메소드들

메소드	설명
ComputeEdgeCollapseCost ( PMVertex src, PMVertex dest ) : float
ComputeEdgeCostAtVertexForBuffer ( PMWorkingData workingData, uint vertIndex ) : float	Internal method evaluates all collapse costs from this vertex and picks the lowest for a single buffer
GetNextCollapser ( ) : int

메소드 상세

AddExtraVertexPositionBuffer() 공개 메소드

Adds an extra vertex position buffer.

As well as the main vertex buffer, the client of this class may add extra versions of the vertex buffer which will also be taken into account when the cost of simplifying the mesh is taken into account. This is because the cost of simplifying an animated mesh cannot be calculated from just the reference position, multiple positions needs to be assessed in order to find the best simplification option.

DO NOT pass write-only, unshadowed buffers to this method! They will not work. Pass only shadowed buffers, or better yet perform mesh reduction as an offline process using DefaultHardwareBufferManager to manage vertex buffers in system memory.

public AddExtraVertexPositionBuffer ( VertexData vertexData ) : void
vertexData	Axiom.Graphics.VertexData	buffer Pointer to x/y/z buffer with vertex positions. /// The number of vertices must be the same as in the original GeometryData passed to the constructor. ///
리턴	void

AddWorkingData() 공개 메소드

Internal method for building PMWorkingData from geometry data

public AddWorkingData ( VertexData vertexData, IndexData indexData ) : void
vertexData	Axiom.Graphics.VertexData
indexData	Axiom.Graphics.IndexData
리턴	void

BakeNewLOD() 공개 메소드

Internal method builds an new LOD based on the current state

public BakeNewLOD ( IndexData indexData ) : void
indexData	Axiom.Graphics.IndexData	Index data which will have an index buffer created and initialized
리턴	void

Build() 공개 메소드

public Build ( ushort numLevels, List lodFaceList ) : void
numLevels	ushort
lodFaceList	List
리턴	void

Build() 공개 메소드

public Build ( ushort numLevels, List lodFaceList, VertexReductionQuota quota ) : void
numLevels	ushort
lodFaceList	List
quota	VertexReductionQuota
리턴	void

Build() 공개 메소드

Builds the progressive mesh with the specified number of levels.

public Build ( ushort numLevels, List lodFaceList, VertexReductionQuota quota, float reductionValue ) : void
numLevels	ushort
lodFaceList	List
quota	VertexReductionQuota
reductionValue	float
리턴	void

Build() 공개 메소드

public Build ( ushort numLevels, List lodFaceList, float reductionValue ) : void
numLevels	ushort
lodFaceList	List
reductionValue	float
리턴	void

Collapse() 공개 메소드

Internal method, collapses vertex onto it's saved collapse target.

This updates the working triangle list to drop a triangle and recalculates the edge collapse costs around the collapse target. This also updates all the working vertex lists for the relevant buffer.

public Collapse ( PMVertex src ) : void
src	PMVertex
리턴	void

ComputeAllCosts() 공개 메소드

public ComputeAllCosts ( ) : void
리턴	void

ComputeEdgeCostAtVertex() 공개 메소드

public ComputeEdgeCostAtVertex ( uint vertIndex ) : void
vertIndex	uint
리턴	void

InitialiseEdgeCollapseCosts() 공개 메소드

public InitialiseEdgeCollapseCosts ( ) : void
리턴	void

ProgressiveMesh() 공개 메소드

Constructor, takes the geometry data and index buffer.

public ProgressiveMesh ( VertexData vertexData, IndexData indexData ) : System
vertexData	Axiom.Graphics.VertexData
indexData	Axiom.Graphics.IndexData
리턴	System