Ogre::EdgeListBuilder Class Reference
[Math]

General utility class for building edge lists for geometry. More...

#include <OgreEdgeListBuilder.h>

Classes
struct	CommonVertex
	A vertex can actually represent several vertices in the final model, because vertices along texture seams etc will have been duplicated. More...
struct	Geometry
	A set of indexed geometry data. More...
struct	geometryLess
	Comparator for sorting geometries by vertex set. More...
struct	vectorLess
	Comparator for unique vertex list. More...
Public Member Functions
	EdgeListBuilder ()
virtual	~EdgeListBuilder ()
void	addVertexData (const VertexData *vertexData)
	Add a set of vertex geometry data to the edge builder.
void	addIndexData (const IndexData *indexData, size_t vertexSet=0, RenderOperation::OperationType opType=RenderOperation::OT_TRIANGLE_LIST)
	Add a set of index geometry data to the edge builder.
EdgeData *	build (void)
	Builds the edge information based on the information built up so far.
void	log (Log *l)
	Debugging method.
Protected Types
typedef vector< const VertexData * >::type	VertexDataList
typedef vector< Geometry >::type	GeometryList
typedef vector< CommonVertex > ::type	CommonVertexList
typedef map< Vector3, size_t, vectorLess >::type	CommonVertexMap
	Map for identifying common vertices.
typedef multimap< std::pair < size_t, size_t >, std::pair < size_t, size_t > >::type	EdgeMap
	Edge map, used to connect edges.
Protected Member Functions
void	buildTrianglesEdges (const Geometry &geometry)
size_t	findOrCreateCommonVertex (const Vector3 &vec, size_t vertexSet, size_t indexSet, size_t originalIndex)
	Finds an existing common vertex, or inserts a new one.
void	connectOrCreateEdge (size_t vertexSet, size_t triangleIndex, size_t vertIndex0, size_t vertIndex1, size_t sharedVertIndex0, size_t sharedVertIndex1)
	Connect existing edge or create a new edge - utility method during building.
Protected Attributes
GeometryList	mGeometryList
VertexDataList	mVertexDataList
CommonVertexList	mVertices
EdgeData *	mEdgeData
CommonVertexMap	mCommonVertexMap
EdgeMap	mEdgeMap

Detailed Description

General utility class for building edge lists for geometry.

Remarks:: You can add multiple sets of vertex and index data to build and edge list. Edges will be built between the various sets as well as within sets; this allows you to use a model which is built from multiple SubMeshes each using separate index and (optionally) vertex data and still get the same connectivity information. It's important to note that the indexes for the edge will be constrained to a single vertex buffer though (this is required in order to render the edge).

Definition at line 163 of file OgreEdgeListBuilder.h.

Member Typedef Documentation

typedef vector<CommonVertex>::type Ogre::EdgeListBuilder::CommonVertexList [protected]

Definition at line 240 of file OgreEdgeListBuilder.h.

typedef map<Vector3, size_t, vectorLess>::type Ogre::EdgeListBuilder::CommonVertexMap [protected]

Map for identifying common vertices.

Definition at line 247 of file OgreEdgeListBuilder.h.

typedef multimap< std::pair<size_t, size_t>, std::pair<size_t, size_t> >::type Ogre::EdgeListBuilder::EdgeMap [protected]

Edge map, used to connect edges.

Note we allow many triangles on an edge, after connected an existing edge, we will remove it and never used again.

Definition at line 252 of file OgreEdgeListBuilder.h.

typedef vector<Geometry>::type Ogre::EdgeListBuilder::GeometryList [protected]

Definition at line 239 of file OgreEdgeListBuilder.h.

typedef vector<const VertexData*>::type Ogre::EdgeListBuilder::VertexDataList [protected]

Definition at line 238 of file OgreEdgeListBuilder.h.

Constructor & Destructor Documentation

Ogre::EdgeListBuilder::EdgeListBuilder ( )

virtual Ogre::EdgeListBuilder::~EdgeListBuilder ( ) [virtual]

Member Function Documentation

void Ogre::EdgeListBuilder::addIndexData	(	const IndexData *	indexData,
		size_t	vertexSet = `0`,
		RenderOperation::OperationType	opType = `RenderOperation::OT_TRIANGLE_LIST`
	)

Add a set of index geometry data to the edge builder.

Remarks:: You must add at least one set of index data to the builder before invoking the build method.

Parameters:

	indexData	The index information which describes the triangles.
	vertexSet	The vertex data set this index data refers to; you only need to alter this if you have added multiple sets of vertices
	opType	The operation type used to render these indexes. Only triangle types are supported (no point or line types)

void Ogre::EdgeListBuilder::addVertexData ( const VertexData * vertexData )

Add a set of vertex geometry data to the edge builder.

Remarks:: You must add at least one set of vertex data to the builder before invoking the build method.

EdgeData* Ogre::EdgeListBuilder::build ( void )

Builds the edge information based on the information built up so far.

Remarks:: The caller takes responsibility for deleting the returned structure.

void Ogre::EdgeListBuilder::buildTrianglesEdges ( const Geometry & geometry ) [protected]

void Ogre::EdgeListBuilder::connectOrCreateEdge	(	size_t	vertexSet,
		size_t	triangleIndex,
		size_t	vertIndex0,
		size_t	vertIndex1,
		size_t	sharedVertIndex0,
		size_t	sharedVertIndex1
	)			`[protected]`