[MINC-users] ray_trace colour maps and rendering labels

[Claude LEPAGE]

Hi Jim,

I have played with those colours in the past. I forget the details, 
but here are some clues:

bicpl/Volumes/colour_coding.c, function recreate_piecewise_function()

You may be able to create labels from this:

    static  colour_point  spectral_points[] =
                    { { 0.00, 0.0000,0.0000,0.0000, 1.0, RGB_SPACE},
                      { 0.05, 0.4667,0.0000,0.5333, 1.0, RGB_SPACE},
                      { 0.10, 0.5333,0.0000,0.6000, 1.0, RGB_SPACE},
                      { 0.15, 0.0000,0.0000,0.6667, 1.0, RGB_SPACE},
                      { 0.20, 0.0000,0.0000,0.8667, 1.0, RGB_SPACE},
                      { 0.25, 0.0000,0.4667,0.8667, 1.0, RGB_SPACE},
                       ...
                      { 0.85, 1.0000,0.0000,0.0000, 1.0, RGB_SPACE},
                      { 0.90, 0.8667,0.0000,0.0000, 1.0, RGB_SPACE},
                      { 0.95, 0.8000,0.0000,0.0000, 1.0, RGB_SPACE},
                      { 1.00, 0.8000,0.8000,0.8000, 1.0, RGB_SPACE}
                    };

First column runs from 0 to 1 and maps to (MIN,MAX) in your intensity
range. Suppose you want 10 labels being 1,2,3,4,5,6,7,8,9,10.
    { { 0.00,     0.0000,0.0000,0.0000, 1.0, RGB_SPACE},  // label 1 centered at 0.05
      { 0.099999, 0.0000,0.0000,0.0000, 1.0, RGB_SPACE},
      { 0.100001, 0.4667,0.0000,0.5333, 1.0, RGB_SPACE},  // label 2 centered at 0.15
      { 0.199999, 0.4667,0.0000,0.5333, 1.0, RGB_SPACE},
      { 0.200001, 0.5333,0.0000,0.6000, 1.0, RGB_SPACE},  // label 3 centered at 0.25
      { 0.299999, 0.5333,0.0000,0.6000, 1.0, RGB_SPACE},

Also have a look at brain-view-0.7.0/src/brainApp.cc for a list of labels
for painting:

#define NUM_PAINTING_LABELS 32
static unsigned char rgbt[] = { 255, 255, 255,   // white
                                255,   0,   0,   // red
                                  0, 255,   0,   // green
                                  0,   0, 255,   // blue
                                // from http://cloford.com/resources/colours/500col.htm
                                255, 181, 197,   // pink 1
                                205, 105, 201,   // orchid 3
                                132, 112, 255,   // lightslateblue
                                 78, 238, 148,   // seagreen 2
                                255, 255,   0,   // yellow 1
                                255, 185,  15,   // darkgoldenrod 1
                                255, 231, 186,   // wheat 1
                                 56, 142, 142,   // sgi teal
                                197, 193, 170,   // sgi brightgray
                                139,  26,  26,   // firebrick 4
                                139, 137, 137,   // snow 4
                                244, 164,  96,   // sandybrown
                                255, 215,   0,   // gold 1
                                205, 205,   0,   // yellow 3
                                118, 238,   0,   // chartreuse 2
                                189, 252, 201,   // mint
                                 72, 209, 204,   // mediumturquoise
                                255,   0, 255,   // magenta
                                205, 181, 205,   // thistle 1
                                145,  44, 238,   // purple 2
                                 72, 118, 255,   // royalblue 1
                                  0, 255, 127,   // springgreen
                                107, 142,  35,   // olivedrab
                                237, 145,  33,   // carrot
                                158, 158, 158,   // gray 62
                                 26,  26,  26,   // gray 10
                                238,  59,  59,   // brown 2
                                124, 205, 124    // palegreen 3
                              };

Have fun. If you get something nice in bicpl, feed it back my way so that
I can include in the next version.

Claude