void
GfRGB::GetHSV(float *h, float *s, float *v) const
{
const GfRGB &rgb = *this;
float max = GfMax(rgb[0], GfMax(rgb[1], rgb[2]));
float min = GfMin(rgb[0], GfMin(rgb[1], rgb[2]));
float diff = max - min;
// The value is the maximum component.
*v = max;
// Saturation
*s = (max != 0.0 ? diff / max : 0.0);
// Hue
if (*s != 0.0) {
if (rgb[0] == max)
*h = (rgb[1] - rgb[2]) / diff;
else if (rgb[1] == max)
*h = 2.0 + (rgb[2] - rgb[0]) / diff;
else
*h = 4.0 + (rgb[0] - rgb[1]) / diff;
if (*h < 0.0)
*h += 6.0;
*h /= 6.0;
}
else
*h = 0.0;
}
GfRange3f
GfRange3f::GetOctant(size_t i) const
{
if (i > 7) {
TF_CODING_ERROR("Invalid octant %zu > 7.", i);
return GfRange3f();
}
GfVec3f a = GetCorner(i);
GfVec3f b = .5 * (_min + _max);
return GfRange3f(
GfVec3f(GfMin(a[0], b[0]), GfMin(a[1], b[1]), GfMin(a[2], b[2])),
GfVec3f(GfMax(a[0], b[0]), GfMax(a[1], b[1]), GfMax(a[2], b[2])));
}
GfRange2d
GfRange2d::GetQuadrant(size_t i) const
{
if (i > 3) {
TF_CODING_ERROR("Invalid quadrant %zu > 3.", i);
return GfRange2d();
}
GfVec2d a = GetCorner(i);
GfVec2d b = .5 * (_min + _max);
return GfRange2d(
GfVec2d(GfMin(a[0], b[0]), GfMin(a[1], b[1])),
GfVec2d(GfMax(a[0], b[0]), GfMax(a[1], b[1])));
}
