48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
|
// Begin License:
|
||
|
|
// Copyright (C) 2006-2008 Tobias Sargeant (tobias.sargeant@gmail.com).
|
||
|
|
// All rights reserved.
|
||
|
|
//
|
||
|
|
// This file is part of the Carve CSG Library (http://carve-csg.com/)
|
||
|
|
//
|
||
|
|
// This file may be used under the terms of the GNU General Public
|
||
|
|
// License version 2.0 as published by the Free Software Foundation
|
||
|
|
// and appearing in the file LICENSE.GPL2 included in the packaging of
|
||
|
|
// this file.
|
||
|
|
//
|
||
|
|
// This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
|
||
|
|
// INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
|
||
|
|
// A PARTICULAR PURPOSE.
|
||
|
|
// End:
|
||
|
|
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <carve/carve.hpp>
|
||
|
|
#include <carve/geom.hpp>
|
||
|
|
|
||
|
|
namespace carve {
|
||
|
|
namespace colour {
|
||
|
|
static inline void HSV2RGB(float H, float S, float V, float &r, float &g, float &b) {
|
||
|
|
H = 6.0f * H;
|
||
|
|
if (S < 5.0e-6) {
|
||
|
|
r = g = b = V; return;
|
||
|
|
} else {
|
||
|
|
int i = (int)H;
|
||
|
|
float f = H - i;
|
||
|
|
float p1 = V * (1.0f - S);
|
||
|
|
float p2 = V * (1.0f - S * f);
|
||
|
|
float p3 = V * (1.0f - S * (1.0f - f));
|
||
|
|
switch (i) {
|
||
|
|
case 0: r = V; g = p3; b = p1; return;
|
||
|
|
case 1: r = p2; g = V; b = p1; return;
|
||
|
|
case 2: r = p1; g = V; b = p3; return;
|
||
|
|
case 3: r = p1; g = p2; b = V; return;
|
||
|
|
case 4: r = p3; g = p1; b = V; return;
|
||
|
|
case 5: r = V; g = p1; b = p2; return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
r = g = b = 0.0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|