> You can do it with a ScalarMap to Display.RGBA. The
> getControl() method for this ScalarMap will return a
> ColorAlphaControl, and you can call its setTable() method
> to set the 4-component lookup table for red, green, blue
> and alpha. See Sections 4.6 and 4.11 of the tutorial for
> more details.
Hey, that was really obvious now that you point it out!
Thanks guys. It's not working at the moment, I can certainly
change the colours, but the alpha doesn't change. Is it something
to do with me using ImageRendererJ3D?
My code is:
// Add a scalarMap to map the samples to RGBA
ScalarMap range2D = new ScalarMap(
(RealType)rtype.getComponent(0),
Display.RGBA);
display.addMap(range2D);
// Create a RGBA lookup table
final int dataDepth = 16;
myColorTable = new float[4][dataDepth];
for(int i=0; i<dataDepth; i++) {
myColorTable[0][i]= (float)0; // red
myColorTable[1][i]= (float)0; // green
myColorTable[2][i]= (float)i; // blue
myColorTable[3][i]= (float)i; // alpha
}
// This does change the background to grey
myColorTable[0][0]= (float)0.5;
myColorTable[1][0]= (float)0.5;
myColorTable[2][0]= (float)0.5;
myColorTable[3][0]= (float)0.5;
// ColorControl control
(ColorControl)range2D.getControl();
// control.initGreyWedge();
// control.initVis5D();
ColorAlphaControl control
(ColorAlphaControl)range2D.getControl();
control.setTable(myColorTable);
thanks again,
Andrew.
--
Andrew Donaldson
Email: A.Donaldson@xxxxxxxxxx Bureau of Meteorology
Phone: +61 3 9669 4537 P.O. Box. 1289K/150 Lonsdale St,
Fax: +61 3 9669 4128 Melbourne, Australia.
