0.0 -> (0, 0, 128) (dark blue)
0.25 -> (0, 255, 0) (green)
0.5 -> (255, 255, 0) (yellow)
0.75 -> (255, 128, 0) (orange)
1.0 -> (255, 0, 0) (red)
color = 1 / 5 * (0, 0, 128) / 0.25 + 4 / 5 * (0, 255, 0)
= (0, 204, 26)
if(intensity <= 0.25) {
p->r = 0;
p->g = 0;
p->b = (intensity) * 4 * 255;
return;
}
if(intensity <= 0.5) {
p->r = 0;
p->g = (intensity - 0.25) * 4 * 255;
p->b = 255;
return;
}
if(intensity <= 0.75) {
p->r = 0;
p->g = 255;
p->b = (0.75 - intensity) * 4 * 255;
return;
}
if(intensity <= 1.0) {
p->r = (intensity - 0.75) * 4 * 255;
p->g = (1.0 - intensity) * 4 * 255;
p->b = 0;
return;
}
