Re: shape.angle

• To: John Yao <johnyao@xxxxxxxx>
• Subject: Re: shape.angle
• From: Doug Lindholm <lind@xxxxxxxx>
• Date: Mon, 01 Oct 2001 09:53:35 -0600

I don't know about Display.ShapeAngle, but here is an example of how I
rotate a VisADGeometryArray ("shape" in this example). It uses stuff
from Java3D's javax.vecmath package.

    Vector3f v
null;                                                                           
                                                                             
    float[] t = new
float[3];                                                        
Matrix3f matrix = new Matrix3f();
    matrix.rotZ( angle );
 
    for( int i=0; i<shape.coordinates.length; i+=3 ) {
      v = new Vector3f( shape.coordinates[i],
                        shape.coordinates[i+1],
                        shape.coordinates[i+2] );
      matrix.transform(v);
      v.get(t);
 
      shape.coordinates[i] = t[0];
      shape.coordinates[i+1] = t[1];
      shape.coordinates[i+2] = t[2];
 
    }

Hope this helps,

Doug

John Yao wrote:
> 
> Hello,
> 
> Recently I was able to create glyphs and change their properties (i.e. size
> and colors) on-the-fly.  However, I am not able to rotate them.  I have
> heard that visad will have a Display.ShapeAngle and I am curious when that
> will be available in the future before I look for other solutions (probably
> more complex).  Thanks in advance.
> 
> john

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• References:
  • shape.angle
    • From: John Yao