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Types.h

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00001 /*
00002     liban - base function to do usefull things related to simulation and scientific work
00003     Copyright (C) 1999-2005 Stephane Magnenat <nct@ysagoon.com>
00004     Copyright (c) 2004-2005 Antoine Beyeler <antoine.beyeler@epfl.ch>
00005     Copyright (C) 2005 Laboratory of Intelligent Systems, EPFL, Lausanne
00006     See AUTHORS for details
00007 
00008     This program is free software. You can redistribute it and/or modify
00009     it under the terms of the GNU General Public License as published by
00010     the Free Software Foundation; either version 2 of the License, or
00011     (at your option) any later version.
00012 
00013     This program is distributed in the hope that it will be useful,
00014     but WITHOUT ANY WARRANTY; without even the implied warranty of
00015     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016     GNU General Public License for more details.
00017 
00018     You should have received a copy of the GNU General Public License
00019     along with this program; if not, write to the Free Software
00020     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00021 */
00022 
00023 #ifndef __AN_TYPES_H
00024 #define __AN_TYPES_H
00025 
00026 #include <valarray>
00027 #include <cassert>
00028 
00055 namespace An
00056 {
00058 
00059     struct Color
00060     {
00062         double components[4];
00063         
00065         Color(double r = 0.0, double g = 0.0, double b = 0.0, double a = 1.0)
00066         {
00067             components[0] = r;
00068             components[1] = g;
00069             components[2] = b;
00070             components[3] = a;
00071         }
00072         
00074         const double& operator[](size_t i) const { assert((i >= 0) && (i < 4)); return components[i]; }
00076         double& operator[](size_t i) { assert((i >= 0) && (i < 4)); return components[i]; }
00077         
00078         // operations with scalar
00080         void operator +=(double d) { for (size_t i=0; i<3; i++) components[i] += d; }
00082         Color operator +(double d) const { Color c; for (size_t i=0; i<3; i++) c.components[i] = components[i] + d; return c; }
00083         
00085         void operator -=(double d) { for (size_t i=0; i<3; i++) components[i] -= d; }
00087         Color operator -(double d) const { Color c; for (size_t i=0; i<3; i++) c.components[i] = components[i] - d; return c; }
00088         
00090         void operator *=(double d) { for (size_t i=0; i<3; i++) components[i] *= d; }
00092         Color operator *(double d) const { Color c; for (size_t i=0; i<3; i++) c.components[i] = components[i] * d; return c; }
00093         
00095         void operator /=(double d) { for (size_t i=0; i<3; i++) components[i] /= d; }
00097         Color operator /(double d) const { Color c; for (size_t i=0; i<3; i++) c.components[i] = components[i] / d; return c; }
00098         
00099         // operation with another color
00101         void operator +=(const Color &oc) { for (size_t i=0; i<3; i++) components[i] += oc.components[i]; }
00103         Color operator +(const Color &oc) const { Color c; for (size_t i=0; i<3; i++) c.components[i] = components[i] + oc.components[i]; return c; }
00104         
00106         void operator -=(const Color &oc) { for (size_t i=0; i<3; i++) components[i] -= oc.components[i]; }
00108         Color operator -(const Color &oc) const { Color c; for (size_t i=0; i<3; i++) c.components[i] = components[i] - oc.components[i]; return c; }
00109         
00111         bool operator ==(const Color &c) const { for (size_t i=0; i<4; i++) if (components[i] != c.components[i]) return false; return true; }
00113         bool operator !=(const Color &c) const { return !(*this == c); }
00115         void threshold(const Color &limit) { for (size_t i=0; i<3; i++) components[i] = components[i] > limit.components[i] ? components[i] : 0; }
00117         double gray() const { return (components[0] + components[1] + components[2]) / 3; }
00118         
00120         static const Color black;
00122         static const Color white;
00124         static const Color red;
00126         static const Color green;
00128         static const Color blue;
00129     };
00130 
00132 
00133     typedef std::valarray<Color> Texture;
00134 }
00135 
00136 #endif

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