Vertex split
object encoding a reversible edge-collapse operation.
The vertex split object is the building block of the progressive mesh representation proposed by Hoppe ("Progressive meshes", SIGGRAPH, 1996). It encodes an edge collapse operation and its inverse the "vertex split". The implementation of vertex split in GTS is somewhat more general than the original version of Hoppe. Non-manifold edges can be collapsed and non-manifold vertices can be split.
Casts @klass to #GtsSplitClass.
@klass: a descendant of #GtsSplitClass.
Casts @obj to #GtsSplit.
@obj: a descendant of #GtsSplit.
Evaluates to %TRUE if @obj is a #GtsSplit.
@obj: a pointer to test.
Evaluates to the first vertex of the edge collapsed by @vs.
@vs: a #GtsSplit.
Evaluates to the second vertex of the edge collapsed by @vs.
@vs: a #GtsSplit.
The vertex split class.
@parent_class:
An opaque structure describing the faces collapsed by a vertex split.
The vertex split object. If @v1 is a #GtsSplit the corresponding vertex can be found in GTS_SPLIT(v1)->v. This conversion is performed directly by the two macros #GTS_SPLIT_V1 and #GTS_SPLIT_V2. Together with the current #GtsSplit, @v1 and @v2 define one level of a vertex split tree. If @v1 or @v2 are both #GtsVertex, the current vertex split is a leaf of the tree.
@object:
@v: Vertex to be split.
@v1: Either a #GtsSplit or #GtsVertex, first vertex of the edge to be expanded.
@v2: Either a #GtsSplit or #GtsVertex, second vertex of the edge to be expanded.
@cfaces: An array of #GtsSplitCFace describing the faces collapsed by the vertex split.
@ncf: Number of faces collapsed in @cfaces.
@Returns:
@klass:
@v:
@o1:
@o2:
@Returns:
@vs:
@klass:
@heap:
@vs:
@s:
@klass:
@root:
@Returns:
A user-defined function to be called when traversing a vertex split tree.
@vs: the #GtsSplit for which this function is called.
@data: user data passed to the function.
@Returns: %TRUE to stop the traversal, %FALSE to continue.
@root:
@order:
@depth:
@func:
@data: