Jean-Marie,
Here is a short example. As you discovered the documentation for this
feature is not very useful...!
Sincerely,
Daniel Selman
[EMAIL PROTECTED]
Tornado Labs Ltd.
http://www.tornadolabs.com
generate a surface from 10 vertices and create a hole in the surface by
removing
a hole defined using 5 vertices. Note that the hole must be entirely within
the
outer polygon.
private double[] m_VertexArray = {1,1,0, //0
0,3,0, //1
1,5,0, //2
2,4,0, //3
4,5,0, //4
3,3,0, //5
4,2,0, //6
4,0,0, //7
3,0,0, //8
2,1,0, //9
these are vertices for the hole
1,3,0, //10
2,3,0, //11
3,2,0, //12
3,1,0, //13
2,2,0};//14
triangulate the polygon
GeometryInfo gi = new GeometryInfo( GeometryInfo.POLYGON_ARRAY );
gi.setCoordinates( m_VertexArray );
the first 10 points make up the outer edge of the polygon, the next five
make up the hole
int[] stripCountArray = {10,5};
int[] countourCountArray = {stripCountArray.length};
gi.setContourCounts( countourCountArray );
gi.setStripCounts( stripCountArray );
Triangulator triangulator = new Triangulator();
triangulator.triangulate( gi );
also generate normal vectors so that the surface can be light
NormalGenerator normalGenerator = new NormalGenerator();
normalGenerator.generateNormals( gi );
create an appearance
Appearance ap = new Appearance();
render as a wireframe
PolygonAttributes polyAttrbutes = new PolygonAttributes();
polyAttrbutes.setPolygonMode( PolygonAttributes.POLYGON_LINE );
polyAttrbutes.setCullFace( PolygonAttributes.CULL_NONE ) ;
ap.setPolygonAttributes( polyAttrbutes );
add both a wireframe and a solid version of the triangulated surface
Shape3D shape1 = new Shape3D( gi.getGeometryArray(), ap );
Shape3D shape2 = new Shape3D( gi.getGeometryArray() );
-----Original Message-----
From: Discussion list for Java 3D API
[mailto:[EMAIL PROTECTED]]On Behalf Of Jean-Marie Dautelle
Sent: Thursday, January 11, 2001 3:44 PM
To: [EMAIL PROTECTED]
Subject: GeometryInfo Bug?
Could someone give me an example of code to create a polygon with an hole in
it
using com.sun.j3d.utils.geometry.GeometryInfo.setContourCounts(int[]).
I tried everything and it doesn't seem to work!?? (I suspect a bug...).
Thanks.
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