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authormaxim-yurchuk <maxim-yurchuk@yandex-team.com>2024-10-09 12:29:46 +0300
committermaxim-yurchuk <maxim-yurchuk@yandex-team.com>2024-10-09 13:14:22 +0300
commit9731d8a4bb7ee2cc8554eaf133bb85498a4c7d80 (patch)
treea8fb3181d5947c0d78cf402aa56e686130179049 /contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_arc.cpp
parenta44b779cd359f06c3ebbef4ec98c6b38609d9d85 (diff)
downloadydb-9731d8a4bb7ee2cc8554eaf133bb85498a4c7d80.tar.gz
publishFullContrib: true for ydb
<HIDDEN_URL> commit_hash:c82a80ac4594723cebf2c7387dec9c60217f603e
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+//----------------------------------------------------------------------------
+// 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;
+ }
+
+}