[Olena-patches] last-svn-commit-836-g5746d81 Added algorithm to convert a vec2d_f to rgb.

* mln/fun/v2v/vec2d_f_to_rgb.hh: New. --- milena/ChangeLog | 6 ++ milena/mln/fun/v2v/vec2d_f_to_rgb.hh | 165 ++++++++++++++++++++++++++++++++++ 2 files changed, 171 insertions(+), 0 deletions(-) create mode 100644 milena/mln/fun/v2v/vec2d_f_to_rgb.hh diff --git a/milena/ChangeLog b/milena/ChangeLog index 0a975df..6a8245b 100644 --- a/milena/ChangeLog +++ b/milena/ChangeLog @@ -1,5 +1,11 @@ 2012-05-03 Sylvain Lobry &lt;lobry(a)lrde.epita.fr&gt; + Added algorithm to convert a vec2d_f to rgb. + + * mln/fun/v2v/vec2d_f_to_rgb.hh: New. + +2012-05-03 Sylvain Lobry &lt;lobry(a)lrde.epita.fr&gt; + Added flo routines in all.hh. * mln/io/all.hh: Here. diff --git a/milena/mln/fun/v2v/vec2d_f_to_rgb.hh b/milena/mln/fun/v2v/vec2d_f_to_rgb.hh new file mode 100644 index 0000000..99a46e8 --- /dev/null +++ b/milena/mln/fun/v2v/vec2d_f_to_rgb.hh @@ -0,0 +1,165 @@ +// Copyright (C) 2012 EPITA Research and Development Laboratory +// (LRDE) +// +// This file is part of Olena. +// +// Olena is free software: you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation, version 2 of the License. +// +// Olena is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with Olena. If not, see <http://www.gnu.org/licenses/>. +// +// As a special exception, you may use this file as part of a free +// software project without restriction. Specifically, if other files +// instantiate templates or use macros or inline functions from this +// file, or you compile this file and link it with other files to produce +// an executable, this file does not by itself cause the resulting +// executable to be covered by the GNU General Public License. This +// exception does not however invalidate any other reasons why the +// executable file might be covered by the GNU General Public License. + +#ifndef MLN_FUN_V2V_VEC2D_F_TO_RGB_HH +# define MLN_FUN_V2V_VEC2D_F_TO_RGB_HH + +/// \file +/// +/// \brief Convert vec2d_f values to RGB. + +# include <math.h> +# include <mln/value/rgb.hh> +# include <mln/core/alias/vec2d.hh> +# include <mln/math/round.hh> + +# define setvals(r, g, b, k) {color_wheel[k][0] = r;\ + color_wheel[k][1] = g;\ + color_wheel[k++][2] = b;} + +namespace mln +{ + + namespace fun + { + + namespace v2v + { + + /// \brief Convert vec2d_f values to rgb. + /// + /// \ingroup modfunv2v + // + template <typename T_rgb> + struct f_vec2d_f_to_rgb_ : public Function_v2v< f_vec2d_f_to_rgb_<T_rgb> > + { + typedef T_rgb result; + + T_rgb operator()(const mln::vec2d_f& vec) const; + + }; + +# ifndef MLN_INCLUDE_ONLY + + + template <typename T_rgb> + inline + T_rgb + f_vec2d_f_to_rgb_<T_rgb>::operator()(const mln::vec2d_f& vec) const + { + typedef typename T_rgb::red_t red_t; + typedef typename T_rgb::green_t green_t; + typedef typename T_rgb::blue_t blue_t; + + red_t r; + green_t g; + blue_t b; + + static math::round<red_t> to_r; + static math::round<green_t> to_g; + static math::round<blue_t> to_b; + + int RY = 15; + int YG = 6; + int GC = 4; + int CB = 11; + int BM = 13; + int MR = 6; + + int color_wheel[55][3]; + + int k = 0; + for (int i = 0; i < RY; ++i) + setvals(255, 255 * i / RY, 0, k); + for (int i = 0; i < YG; ++i) + setvals(255 - 255 * i / YG, 255, 0, k); + for (int i = 0; i < GC; ++i) + setvals(0, 255, 255 * i / GC, k); + for (int i = 0; i < CB; ++i) + setvals(0, 255 - 255 * i / CB, 255, k); + for (int i = 0; i < BM; ++i) + setvals(255 * i / BM, 0, 255, k); + for (int i = 0; i < MR; ++i) + setvals(255, 0, 255 - 255 * i / MR, k); + + float u = vec[0]; + float v = vec[1]; + + float rad = sqrt (u * u + v * v); + float a = atan2 (-v, -u) / 3.14159265; + float fk = (a + 1.0) / 2.0 * (54); + int k0 = (int)fk; + int k1 = (k0 + 1) % 55; + float f = fk - k0; + + //Red. + float col0 = color_wheel[k0][0] / 255.0; + float col1 = color_wheel[k1][0] / 255.0; + float col = (1 - f) * col0 + f * col1; + if (rad <= 1) + col = 1 - rad * (1 - col); + else + col *= 0.75; + + r = to_r(255 * col); + + //Green. + col0 = color_wheel[k0][1] / 255.0; + col1 = color_wheel[k1][1] / 255.0; + col = (1 - f) * col0 + f * col1; + if (rad <= 1) + col = 1 - rad * (1 - col); + else + col *= 0.75; + + g = to_g(255 * col); + + //Blue. + col0 = color_wheel[k0][2] / 255.0; + col1 = color_wheel[k1][2] / 255.0; + col = (1 - f) * col0 + f * col1; + if (rad <= 1) + col = 1 - rad * (1 - col); + else + col *= 0.75; + + b = to_b(255 * col); + + T_rgb rgb_result (r, g, b); + + return (rgb_result); + } + + +# endif // ! MLN_INCLUDE_ONLY + + } // end of namespace mln::fun::v2v + + } // end of namespace mln::fun + +} // end of namespace mln + +#endif // ! MLN_FUN_V2V_VEC2D_F_TO_RGB_HH -- 1.7.2.5