org.oscim.utils

Class Tessellator

java.lang.Object

org.oscim.utils.Tessellator

public class Tessellator
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
Tessellator()

Method Summary

Modifier and Type	Method and Description
static int	tessellate(float[] points, int ppos, int numPoints, int[] index, int ipos, int numRings, int vertexOffset, VertexData outTris) Special version for ExtrusionLayer to match indices with vertex positions.
static int	tessellate(GeometryBuffer geom, GeometryBuffer outMesh) Tessellates a GeometryBuffer to a triangular/mesh GeometryBuffer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Tessellator

public Tessellator()

Method Detail

tessellate

public static int tessellate(float[] points,
                             int ppos,
                             int numPoints,
                             int[] index,
                             int ipos,
                             int numRings,
                             int vertexOffset,
                             VertexData outTris)

Special version for ExtrusionLayer to match indices with vertex positions. Tessellates polygon in tris elements.

Parameters:

points - the GeometryBuffer.points

ppos - the start point in GeometryBuffer.points (not needed)

numPoints - the points array size GeometryBuffer.pointNextPos

index - the GeometryBuffer.index

ipos - the GeometryBuffer.indexCurrentPos

numRings - the number of ring polygons

vertexOffset - shift outTris index with offset

outTris - the tessellated polygon as triangular VertexData

Returns:

number of indices of outTris

tessellate

public static int tessellate(GeometryBuffer geom,
                             GeometryBuffer outMesh)

Tessellates a GeometryBuffer to a triangular/mesh GeometryBuffer. The points array remains the same.

Parameters:

geom - the input GeometryBuffer as POLY or LINE

outMesh - the out GeometryBuffer as MESH, but has 2D point coordinates.

Returns:

number of indices of out3D (0 if tessellation failed)