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Diffstat (limited to 'agg/inc/agg_span_gouraud.h')
| -rwxr-xr-x | agg/inc/agg_span_gouraud.h | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/agg/inc/agg_span_gouraud.h b/agg/inc/agg_span_gouraud.h deleted file mode 100755 index 76747899b5fc..000000000000 --- a/agg/inc/agg_span_gouraud.h +++ /dev/null @@ -1,180 +0,0 @@ -//---------------------------------------------------------------------------- -// 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 -//---------------------------------------------------------------------------- - -#ifndef AGG_SPAN_GOURAUD_INCLUDED -#define AGG_SPAN_GOURAUD_INCLUDED - -#include "agg_basics.h" -#include "agg_math.h" -#include "agg_span_generator.h" - -namespace agg -{ - - //============================================================span_gouraud - template<class ColorT, class Allocator> - class span_gouraud : public span_generator<ColorT, Allocator> - { - public: - typedef ColorT color_type; - typedef Allocator alloc_type; - - struct coord_type - { - double x; - double y; - color_type color; - }; - - //-------------------------------------------------------------------- - span_gouraud(alloc_type& alloc) : - span_generator<color_type, alloc_type>(alloc), - m_vertex(0) - { - m_cmd[0] = path_cmd_stop; - } - - //-------------------------------------------------------------------- - span_gouraud(alloc_type& alloc, - const color_type& c1, - const color_type& c2, - const color_type& c3, - double x1, double y1, - double x2, double y2, - double x3, double y3, - double d) : - span_generator<color_type, alloc_type>(alloc) - { - colors(c1, c2, c3); - triangle(x1, y1, x2, y2, x3, y3, d); - } - - //-------------------------------------------------------------------- - void colors(ColorT c1, ColorT c2, ColorT c3) - { - m_coord[0].color = c1; - m_coord[1].color = c2; - m_coord[2].color = c3; - } - - //-------------------------------------------------------------------- - // Sets the triangle and dilates it if needed. - // The trick here is to calculate beveled joins in the vertices of the - // triangle and render it as a 6-vertex polygon. - // It's necessary to achieve numerical stability. - // However, the coordinates to interpolate colors are calculated - // as miter joins (calc_intersection). - void triangle(double x1, double y1, - double x2, double y2, - double x3, double y3, - double d) - { - m_coord[0].x = m_x[0] = x1; - m_coord[0].y = m_y[0] = y1; - m_coord[1].x = m_x[1] = x2; - m_coord[1].y = m_y[1] = y2; - m_coord[2].x = m_x[2] = x3; - m_coord[2].y = m_y[2] = y3; - m_cmd[0] = path_cmd_move_to; - m_cmd[1] = path_cmd_line_to; - m_cmd[2] = path_cmd_line_to; - m_cmd[3] = path_cmd_stop; - - if(d != 0.0) - { - dilate_triangle(m_coord[0].x, m_coord[0].y, - m_coord[1].x, m_coord[1].y, - m_coord[2].x, m_coord[2].y, - m_x, m_y, d); - - calc_intersection(m_x[4], m_y[4], m_x[5], m_y[5], - m_x[0], m_y[0], m_x[1], m_y[1], - &m_coord[0].x, &m_coord[0].y); - - calc_intersection(m_x[0], m_y[0], m_x[1], m_y[1], - m_x[2], m_y[2], m_x[3], m_y[3], - &m_coord[1].x, &m_coord[1].y); - - calc_intersection(m_x[2], m_y[2], m_x[3], m_y[3], - m_x[4], m_y[4], m_x[5], m_y[5], - &m_coord[2].x, &m_coord[2].y); - m_cmd[3] = path_cmd_line_to; - m_cmd[4] = path_cmd_line_to; - m_cmd[5] = path_cmd_line_to; - m_cmd[6] = path_cmd_stop; - } - } - - //-------------------------------------------------------------------- - // Vertex Source Interface to feed the coordinates to the rasterizer - void rewind(unsigned) - { - m_vertex = 0; - } - - //-------------------------------------------------------------------- - unsigned vertex(double* x, double* y) - { - *x = m_x[m_vertex]; - *y = m_y[m_vertex]; - return m_cmd[m_vertex++]; - } - - - - protected: - //-------------------------------------------------------------------- - void arrange_vertices(coord_type* coord) const - { - coord[0] = m_coord[0]; - coord[1] = m_coord[1]; - coord[2] = m_coord[2]; - - if(m_coord[0].y > m_coord[2].y) - { - coord[0] = m_coord[2]; - coord[2] = m_coord[0]; - } - - coord_type tmp; - if(coord[0].y > coord[1].y) - { - tmp = coord[1]; - coord[1] = coord[0]; - coord[0] = tmp; - } - - if(coord[1].y > coord[2].y) - { - tmp = coord[2]; - coord[2] = coord[1]; - coord[1] = tmp; - } - } - - - private: - //-------------------------------------------------------------------- - coord_type m_coord[3]; - double m_x[8]; - double m_y[8]; - unsigned m_cmd[8]; - unsigned m_vertex; - }; - -} - -#endif - |