Re: Irregular 3D rendering


Hi Bill,

What I'm trying to do is to render a "volume" of a cylinder rather than a surface. So I guess I should use manifold dimension=3? The raw data is a 2-D matrix in r-z coordinate. Since the data is symmetric in "theta" direction, I want to render the 2D sample data into 3D volume data by simple copying them for different "theta" in r-theta-z coordinate (see the attached 2d.jpg and 3dvolume.jpg). However I am not quite sure how to use the CylindricalCoordinateSystem in Gridded3DSet. Is there any example I can read for this case?

Thanks.

Muz

Hi Muz,

> I want to use Irregular3DSet to render a 2D rectangular matrix into a 3D
cylinder. I'm wondering if there are any examples  I can use.

Use a Gridded3DSet with manifold dimension = 2 instead.
Use the constructor signature:

  public Gridded3DSet(MathType type, float[][] samples,
                      int lengthX, int lengthY)

Where 'float[3][number_of_samples] samples' defines the
3-D locations of grid points on the cylinder and
number_of_samples = lengthX * lengthY.

Note that visad/examples/Test37.java uses a Gridded3DSet
with manifold dimension = 2, as the domain Set of a Field
sampled at a 2-D grid on a curved surface.

Good luck,
Bill




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