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author | maxim-yurchuk <maxim-yurchuk@yandex-team.com> | 2024-10-09 12:29:46 +0300 |
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committer | maxim-yurchuk <maxim-yurchuk@yandex-team.com> | 2024-10-09 13:14:22 +0300 |
commit | 9731d8a4bb7ee2cc8554eaf133bb85498a4c7d80 (patch) | |
tree | a8fb3181d5947c0d78cf402aa56e686130179049 /contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_arc.cpp | |
parent | a44b779cd359f06c3ebbef4ec98c6b38609d9d85 (diff) | |
download | ydb-9731d8a4bb7ee2cc8554eaf133bb85498a4c7d80.tar.gz |
publishFullContrib: true for ydb
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commit_hash:c82a80ac4594723cebf2c7387dec9c60217f603e
Diffstat (limited to 'contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_arc.cpp')
-rw-r--r-- | contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_arc.cpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_arc.cpp b/contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_arc.cpp new file mode 100644 index 0000000000..df2c43a559 --- /dev/null +++ b/contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_arc.cpp @@ -0,0 +1,106 @@ +//---------------------------------------------------------------------------- +// Anti-Grain Geometry - Version 2.4 +// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) +// +// Permission to copy, use, modify, sell and distribute this software +// is granted provided this copyright notice appears in all copies. +// This software is provided "as is" without express or implied +// warranty, and with no claim as to its suitability for any purpose. +// +//---------------------------------------------------------------------------- +// Contact: mcseem@antigrain.com +// mcseemagg@yahoo.com +// http://www.antigrain.com +//---------------------------------------------------------------------------- +// +// Arc vertex generator +// +//---------------------------------------------------------------------------- + +#include <math.h> +#include "agg_arc.h" + + +namespace agg +{ + //------------------------------------------------------------------------ + arc::arc(double x, double y, + double rx, double ry, + double a1, double a2, + bool ccw) : + m_x(x), m_y(y), m_rx(rx), m_ry(ry), m_scale(1.0) + { + normalize(a1, a2, ccw); + } + + //------------------------------------------------------------------------ + void arc::init(double x, double y, + double rx, double ry, + double a1, double a2, + bool ccw) + { + m_x = x; m_y = y; + m_rx = rx; m_ry = ry; + normalize(a1, a2, ccw); + } + + //------------------------------------------------------------------------ + void arc::approximation_scale(double s) + { + m_scale = s; + if(m_initialized) + { + normalize(m_start, m_end, m_ccw); + } + } + + //------------------------------------------------------------------------ + void arc::rewind(unsigned) + { + m_path_cmd = path_cmd_move_to; + m_angle = m_start; + } + + //------------------------------------------------------------------------ + unsigned arc::vertex(double* x, double* y) + { + if(is_stop(m_path_cmd)) return path_cmd_stop; + if((m_angle < m_end - m_da/4) != m_ccw) + { + *x = m_x + cos(m_end) * m_rx; + *y = m_y + sin(m_end) * m_ry; + m_path_cmd = path_cmd_stop; + return path_cmd_line_to; + } + + *x = m_x + cos(m_angle) * m_rx; + *y = m_y + sin(m_angle) * m_ry; + + m_angle += m_da; + + unsigned pf = m_path_cmd; + m_path_cmd = path_cmd_line_to; + return pf; + } + + //------------------------------------------------------------------------ + void arc::normalize(double a1, double a2, bool ccw) + { + double ra = (fabs(m_rx) + fabs(m_ry)) / 2; + m_da = acos(ra / (ra + 0.125 / m_scale)) * 2; + if(ccw) + { + while(a2 < a1) a2 += pi * 2.0; + } + else + { + while(a1 < a2) a1 += pi * 2.0; + m_da = -m_da; + } + m_ccw = ccw; + m_start = a1; + m_end = a2; + m_initialized = true; + } + +} |