Hi Ken,
The mismatch of Z level and color is because the default
is to enable texture mapping, over a surface that is
sub-sampled from the actual data (tis greatly improves
rendering speed for large data). You can disable texture
mapping with:
GraphicsModeControl mode = display.getGraphicsModeControl();
mode.setTextureEnable(false);
Good luck,
Bill
On Mon, 26 Jun 2006, Kenneth Evans, Jr. wrote:
> Hi,
>
> I am having trouble with the colors on a 3D plot using Display.ZAxis.
> Points with the same height do not have the same colors; that is, the color
> does not represent the height well. To illustrate, I am attaching two
> images (hope this works). The first is for a 2D Gaussian from
> Math.Random.nextGaussian() with dimensions 100 x 100. The second is for a
> calculated Gaussian with dimensions 1000 x 1000. The large number of points
> is to get the colors to represent height.
>
> The mapping is: ((col, row) -> intensity)
>
> The maps are:
>
> ScalarMap vals1Map = new ScalarMap(intensityType, Display.ZAxis);
> display.addMap(vals1Map);
> ScalarMap vals2Map = new ScalarMap(intensityType, Display.RGB);
> display.addMap(vals2Map);
>
> This is a test example. The effect is even worse with the typically
> very spiked X-ray diffraction data I am plotting. Am I doing something
> wrong and / or is there a way to get around it. I assume it has to do with
> interpolation in making the 3D rendering. The ColorMap in the images is my
> own, but I get the same results with the default.
>
> Thanks,
>
> -Ken
>
>
>
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