Hello,
Detlef Gaisser wrote:
Hello
I'm trying to Display RGB values in a Color Cube like in Example P4_09, with the
difference that i already have the RGB Values in a 3 dimensional array.
(e.g [255,255,0] should map to yellow and should be displayed as 255,255,0).
Program 4-09 is called Color CubeS, rather than Color Cube. Subtle, but
important difference ;-)
I think you probably want example 4-08. Try something like
(x,y,z) -> (value)
Using a 3D domain set and setting the samples with
int value = 0;
for(int l = 0; l < NLEVS; l++)
for(int c = 0; c < NCOLS; c++)
for(int r = 0; r < NROWS; r++){
// set rgbVal values
flat_samples[0][ value ] = value
value++;
}
more or less like it's done in example 4-08. Then use a ColorControl and
a colour table like
myColorTable = new float[][]{{0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f}, // red component
{0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f}, //
green component
{0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f}}; //
blue component
(also refer to example 4-04 and 4-05:
http://www.geogr.uni-jena.de/~p6taug/visad/tutorial/s4/Section4.html#section4_4)
and set it with:
ColorControl colCont = (ColorControl) yourRGBMap.getControl();
colCont.setTable( myColorTable );
yourRGBMap is a map like
yourRGBMap = new ScalarMap(value, Display.RGB);
Note that you'll have to convert your int values to floats (I mean the
colour table values), e.g.
public float[][] normalize(float[][] tableIn_0_255){
// construct a new table, if you want...
// skip... code for doing that
for (int i = 0; i < tableIn_0_255.length; i++) {
for (int j = 0; j < tableIn_0_255[0].length; j++) {
tableIn_0_255[i][j] = tableIn_0_255[i][j] / 255f;
}
}
return tableIn_0_255;
}
I looked at also at the other examples, but couldn't find a good way to achieve
this.
Thanks for any hint.
Detlef
I hope that helps.
Grüsse,
Ugo
