vtGeomFactory Class Reference

List of all members.

Public Member Functions
	vtGeomFactory (vtGeode *pGeode, vtMesh::PrimType ePrimType, int iVertType, int iMaxVertsPerMesh, int iMatIndex, int iExpectedVerts=-1)
	vtGeomFactory (vtMesh *pMesh)
void	PrimStart ()
void	AddVertex (const FPoint3 &p)
void	PrimEnd ()

---

Detailed Description

The vtGeomFactory class makes it easy to create geometry with a lot of vertices. You simply provide vertices, and it will create as many geometries as necessary to contain them all.

Example:

This example produces a line strip with 10000 vertices. The factory is told to limit the number of vertices in a single primitive to 3000, so it will automatically produce four geometries with 3000, 3000, 3000, and 1000 vertices each. The geometries are automatically added to the indicated geode.

    {
        vtGeode *pLineGeom = new vtGeode;
        vtGeomFactory mf(pLineGeom, osg::PrimitiveSet::LINE_STRIP, 0, 3000, 1);
        mf.PrimStart();
        for (int i = 0; i < 10000; i++)
            mf.AddVertex(FPoint3(i,i,i));
        mf.PrimEnd();
    }

---

Constructor & Destructor Documentation

vtGeomFactory::vtGeomFactory	(	vtGeode *	pGeode,
		vtMesh::PrimType	ePrimType,
		int	iVertType,
		int	iMaxVertsPerMesh,
		int	iMatIndex,
		int	iExpectedVerts = -1
	)

Constructor.

Parameters:

pGeode	The geometry node which will receive the mesh object(s) that this factory will produce.
ePrimType	The type of mesh to produce.
iVertType	The vertex attributes for the meshes to produce.
iMaxVertsPerMesh	The largest number of vertices to allow in a single mesh. When this number is exceeded, the current mesh will be finished and another mesh begun.
iMatIndex	The material index of the mesh when it is added to the geometry node.
iExpectedVerts	If you know how many vertices will be mesh ahead of time, you can save a little time and memory by passing the number.

vtGeomFactory::vtGeomFactory

(

vtMesh *

pMesh

)

Alternate, simpler constructor.

Parameters:

pMesh

The mesh which will receive all the vertices that this factory produces.

---

Member Function Documentation

void vtGeomFactory::AddVertex

(

const FPoint3 &

p

)

Tell the factory to add a vertex to the current primitive.

void vtGeomFactory::PrimEnd

(

)

Tell the factory to end a primitive.

void vtGeomFactory::PrimStart

(

)

Tell the factory to start a primitive.