diff options
Diffstat (limited to 'agg/source/agg_vpgen_segmentator.cpp')
-rwxr-xr-x | agg/source/agg_vpgen_segmentator.cpp | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/agg/source/agg_vpgen_segmentator.cpp b/agg/source/agg_vpgen_segmentator.cpp new file mode 100755 index 000000000000..97e76707c1cb --- /dev/null +++ b/agg/source/agg_vpgen_segmentator.cpp @@ -0,0 +1,67 @@ +//---------------------------------------------------------------------------- +// Anti-Grain Geometry - Version 2.3 +// 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 +//---------------------------------------------------------------------------- + +#include <math.h> +#include "agg_vpgen_segmentator.h" + +namespace agg +{ + + void vpgen_segmentator::move_to(double x, double y) + { + m_x1 = x; + m_y1 = y; + m_dx = 0.0; + m_dy = 0.0; + m_dl = 2.0; + m_ddl = 2.0; + m_cmd = path_cmd_move_to; + } + + void vpgen_segmentator::line_to(double x, double y) + { + m_x1 += m_dx; + m_y1 += m_dy; + m_dx = x - m_x1; + m_dy = y - m_y1; + double len = sqrt(m_dx * m_dx + m_dy * m_dy) * m_approximation_scale; + if(len < 1e-30) len = 1e-30; + m_ddl = 1.0 / len; + m_dl = (m_cmd == path_cmd_move_to) ? 0.0 : m_ddl; + if(m_cmd == path_cmd_stop) m_cmd = path_cmd_line_to; + } + + unsigned vpgen_segmentator::vertex(double* x, double* y) + { + if(m_cmd == path_cmd_stop) return path_cmd_stop; + + unsigned cmd = m_cmd; + m_cmd = path_cmd_line_to; + if(m_dl >= 1.0 - m_ddl) + { + m_dl = 1.0; + m_cmd = path_cmd_stop; + *x = m_x1 + m_dx; + *y = m_y1 + m_dy; + return cmd; + } + *x = m_x1 + m_dx * m_dl; + *y = m_y1 + m_dy * m_dl; + m_dl += m_ddl; + return cmd; + } + +} + |