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Diffstat (limited to 'agg/inc/agg_trans_lens.h')
-rwxr-xr-x | agg/inc/agg_trans_lens.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/agg/inc/agg_trans_lens.h b/agg/inc/agg_trans_lens.h new file mode 100755 index 000000000000..ad900686c3fd --- /dev/null +++ b/agg/inc/agg_trans_lens.h @@ -0,0 +1,79 @@ +//---------------------------------------------------------------------------- +// Anti-Grain Geometry - Version 2.1 +// 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 +//---------------------------------------------------------------------------- + +#ifndef AGG_WARP_MAGNIFIER_INCLUDED +#define AGG_WARP_MAGNIFIER_INCLUDED + +#include <math.h> +#include "agg_basics.h" + + +namespace agg +{ + + class trans_warp_magnifier + { + public: + trans_warp_magnifier() : m_xc(0.0), m_yc(0.0), m_magn(1.0), m_radius(1.0), m_warp(false) {} + + void center(double x, double y) { m_xc = x; m_yc = y; } + void magnification(double m) { m_magn = m; } + void radius(double r) { m_radius = r; } + void warp(bool w) { m_warp = w; } + + void transform(double* x, double* y) const + { + double dx = *x - m_xc; + double dy = *y - m_yc; + double r = sqrt(dx * dx + dy * dy); + double rm = m_radius / m_magn; + if(r < rm) + { + *x = m_xc + dx * m_magn; + *y = m_yc + dy * m_magn; + return; + } + + if(m_warp) + { + double m = (r + rm * (m_magn - 1.0)) / r; + *x = m_xc + dx * m; + *y = m_yc + dy * m; + return; + } + + if(r < m_radius) + { + double m = m_radius / r; + *x = m_xc + dx * m; + *y = m_yc + dy * m; + } + } + + private: + double m_xc; + double m_yc; + double m_magn; + double m_radius; + bool m_warp; + }; + + + +} + + +#endif + |