Hi all,
Perhaps Bill forgot to say (as it has already been pointed out in the
Tutorial ;-) that colour components vary from 0.0 to 1.0.
>
> Map colors like this:
>
> int TABLE_SIZE = 256; // may be whatever you want
> ScalarMap rgbMap = new ScalarMap(yourRealType, Display.RGB);
> display.addMap(rgbMap):
> rgbMap.setRange(lowValueOfRange, hiValueOfRange);
> ColorControl rgbControl = (ColorControl) rgbMap.getControl();
> float [][] table = new float[3][TABLE_SIZE];
> for (int i=0; i<TABLE_SIZE; i++) {
> table[0][i] = // red for i-th value
> table[1][i] = // green for i-th value
> table[2][i] = // blue for i-th value
> }
> rgbControl.setTable(table);
>
So an application of the above is a colour table varying from green to
red (blue is always zero):
int len = 256;
float[][] table = new float[3][len];
for (int i=0; i<len; i++) {
float a = ((float) i) / (float) (len-1);
table[0][i] = a;
table[1][i] = 1.0f - a;
table[2][i] = 0.0f;
}
Red component increases linearly and green component decreases linearly.
Hope my hint helps...
Yours,
Ugo
