org.mt4j.util.opengl
Class GluTrianglulator

java.lang.Object
  javax.media.opengl.glu.GLUtessellatorCallbackAdapter
      org.mt4j.util.opengl.GluTrianglulator

All Implemented Interfaces:

javax.media.opengl.glu.GLUtessellatorCallback

public class GluTrianglulator

extends javax.media.opengl.glu.GLUtessellatorCallbackAdapter

This tesselator produces no triangle strips/fans but only pure triangles.

Author:

Chris

GluTrianglulator

public GluTrianglulator(processing.core.PApplet p)

Creates a new GLU tesselator object and defines callback methods, which the tesselator will later call. These are defined in this class.
NOTE: always remember to delete the used triangulator with deleteTess() after use to prevent memory leaking!

Parameters:

p - the processing context

edgeFlag

public void edgeFlag(boolean boundaryEdge)

Specified by:

edgeFlag in interface javax.media.opengl.glu.GLUtessellatorCallback

Overrides:

edgeFlag in class javax.media.opengl.glu.GLUtessellatorCallbackAdapter

deleteTess

public void deleteTess()

Delete tess.

toTriangleMesh

public MTTriangleMesh toTriangleMesh(java.util.List<Vertex[]> contours,
                                     int windingRule)

Triangulates the given vertex arrays and creates a single triangle mesh.

Parameters:

contours - the contours

windingRule - the winding rule

Returns:

the MT triangle mesh

tesselate

public java.util.List<Vertex> tesselate(Vertex[] contour,
                                        int windingRule)

Tesselates/triangulates the given contours with the given winding rule (ie. GLU.GLU_TESS_WINDING_ODD).

Parameters:

contour - the contour

windingRule - the winding rule

Returns:

the list< vertex>

tesselate

public java.util.List<Vertex> tesselate(java.util.List<Vertex[]> contours)

Tesselate.

Parameters:

contours - the contours

Returns:

the list< vertex>

tesselate

public java.util.List<Vertex> tesselate(java.util.List<Vertex[]> contours,
                                        int windingRule)

Triangulates the given vertex contours and returns a list of triangles.

Parameters:

contours - the vertex arrays to triangulate into one list of triangles

windingRule - the winding rule which determines which parts of the specified shape is "inside" or "outside" the shape.

Returns:

the list< vertex>

See Also:

exmaple GLU.GLU_TESS_WINDING_ODD the produced triangles

begin

public void begin(int type)

Specified by:

begin in interface javax.media.opengl.glu.GLUtessellatorCallback

Overrides:

begin in class javax.media.opengl.glu.GLUtessellatorCallbackAdapter

vertex

public void vertex(java.lang.Object vertexData)

Callback function. Gets called by the tesselator when a new vertex should be drawn.

Specified by:

vertex in interface javax.media.opengl.glu.GLUtessellatorCallback

Overrides:

vertex in class javax.media.opengl.glu.GLUtessellatorCallbackAdapter

Parameters:

vertexData - the vertex data

vertexData

public void vertexData(java.lang.Object vertexData,
                       java.lang.Object polygonData)

Specified by:

vertexData in interface javax.media.opengl.glu.GLUtessellatorCallback

Overrides:

vertexData in class javax.media.opengl.glu.GLUtessellatorCallbackAdapter

combine

public void combine(double[] coords,
                    java.lang.Object[] data,
                    float[] weight,
                    java.lang.Object[] outData)

CombineCallback is used to create a new vertex when edges intersect. coordinate location is trivial to calculate, but weight[4] may be used to average color, normal, or texture coordinate data.

This is called before the call to the vertex-callback method,

Specified by:

combine in interface javax.media.opengl.glu.GLUtessellatorCallback

Overrides:

combine in class javax.media.opengl.glu.GLUtessellatorCallbackAdapter

Parameters:

coords - the coords

data - the data

weight - the weight

outData - the out data

end

public void end()

Specified by:

end in interface javax.media.opengl.glu.GLUtessellatorCallback

Overrides:

end in class javax.media.opengl.glu.GLUtessellatorCallbackAdapter

error

public void error(int errnum)

Specified by:

error in interface javax.media.opengl.glu.GLUtessellatorCallback

Overrides:

error in class javax.media.opengl.glu.GLUtessellatorCallbackAdapter

getTesselator

public javax.media.opengl.glu.GLUtessellator getTesselator()

Gets the tesselator.

Returns:

the tesselator

getTriList

public java.util.List<Vertex> getTriList()

Gets the tri list.

Returns:

the tri list