diff options
Diffstat (limited to 'agg/source/agg_curves.cpp')
| -rwxr-xr-x | agg/source/agg_curves.cpp | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/agg/source/agg_curves.cpp b/agg/source/agg_curves.cpp deleted file mode 100755 index 34659e6..0000000 --- a/agg/source/agg_curves.cpp +++ /dev/null @@ -1,246 +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 -//---------------------------------------------------------------------------- -// -// classes curve3 and curve4 -// -//---------------------------------------------------------------------------- - -#include <math.h> -#include "agg_curves.h" - -namespace agg -{ - - //------------------------------------------------------------------------ - void curve3::init(double x1, double y1, - double x2, double y2, - double x3, double y3) - { - m_start_x = x1; - m_start_y = y1; - m_end_x = x3; - m_end_y = y3; - - double dx1 = x2 - x1; - double dy1 = y2 - y1; - double dx2 = x3 - x2; - double dy2 = y3 - y2; - - double len = sqrt(dx1 * dx1 + dy1 * dy1) + sqrt(dx2 * dx2 + dy2 * dy2); - - m_num_steps = int(len * 0.25 * m_scale); - - if(m_num_steps < 2) - { - m_num_steps = 2; - } - - double subdivide_step = 1.0 / m_num_steps; - double subdivide_step2 = subdivide_step * subdivide_step; - - double tmpx = (x1 - x2 * 2.0 + x3) * subdivide_step2; - double tmpy = (y1 - y2 * 2.0 + y3) * subdivide_step2; - - m_saved_fx = m_fx = x1; - m_saved_fy = m_fy = y1; - - m_saved_dfx = m_dfx = tmpx + (x2 - x1) * (2.0 * subdivide_step); - m_saved_dfy = m_dfy = tmpy + (y2 - y1) * (2.0 * subdivide_step); - - m_ddfx = tmpx * 2.0; - m_ddfy = tmpy * 2.0; - - m_step = m_num_steps; - } - - - - - //------------------------------------------------------------------------ - void curve3::rewind(unsigned) - { - if(m_num_steps == 0) - { - m_step = -1; - return; - } - m_step = m_num_steps; - m_fx = m_saved_fx; - m_fy = m_saved_fy; - m_dfx = m_saved_dfx; - m_dfy = m_saved_dfy; - } - - - - - //------------------------------------------------------------------------ - unsigned curve3::vertex(double* x, double* y) - { - if(m_step < 0) return path_cmd_stop; - if(m_step == m_num_steps) - { - *x = m_start_x; - *y = m_start_y; - --m_step; - return path_cmd_move_to; - } - if(m_step == 0) - { - *x = m_end_x; - *y = m_end_y; - --m_step; - return path_cmd_line_to; - } - m_fx += m_dfx; - m_fy += m_dfy; - m_dfx += m_ddfx; - m_dfy += m_ddfy; - *x = m_fx; - *y = m_fy; - --m_step; - return path_cmd_line_to; - } - - - - - - - - - - - - - - //------------------------------------------------------------------------ - void curve4::init(double x1, double y1, - double x2, double y2, - double x3, double y3, - double x4, double y4) - { - m_start_x = x1; - m_start_y = y1; - m_end_x = x4; - m_end_y = y4; - - double dx1 = x2 - x1; - double dy1 = y2 - y1; - double dx2 = x3 - x2; - double dy2 = y3 - y2; - double dx3 = x4 - x3; - double dy3 = y4 - y3; - - double len = sqrt(dx1 * dx1 + dy1 * dy1) + - sqrt(dx2 * dx2 + dy2 * dy2) + - sqrt(dx3 * dx3 + dy3 * dy3); - - m_num_steps = int(len * 0.25 * m_scale); - - if(m_num_steps < 2) - { - m_num_steps = 2; - } - - double subdivide_step = 1.0 / m_num_steps; - double subdivide_step2 = subdivide_step * subdivide_step; - double subdivide_step3 = subdivide_step * subdivide_step * subdivide_step; - - double pre1 = 3.0 * subdivide_step; - double pre2 = 3.0 * subdivide_step2; - double pre4 = 6.0 * subdivide_step2; - double pre5 = 6.0 * subdivide_step3; - - double tmp1x = x1 - x2 * 2.0 + x3; - double tmp1y = y1 - y2 * 2.0 + y3; - - double tmp2x = (x2 - x3) * 3.0 - x1 + x4; - double tmp2y = (y2 - y3) * 3.0 - y1 + y4; - - m_saved_fx = m_fx = x1; - m_saved_fy = m_fy = y1; - - m_saved_dfx = m_dfx = (x2 - x1) * pre1 + tmp1x * pre2 + tmp2x * subdivide_step3; - m_saved_dfy = m_dfy = (y2 - y1) * pre1 + tmp1y * pre2 + tmp2y * subdivide_step3; - - m_saved_ddfx = m_ddfx = tmp1x * pre4 + tmp2x * pre5; - m_saved_ddfy = m_ddfy = tmp1y * pre4 + tmp2y * pre5; - - m_dddfx = tmp2x * pre5; - m_dddfy = tmp2y * pre5; - - m_step = m_num_steps; - } - - - - - //------------------------------------------------------------------------ - void curve4::rewind(unsigned) - { - if(m_num_steps == 0) - { - m_step = -1; - return; - } - m_step = m_num_steps; - m_fx = m_saved_fx; - m_fy = m_saved_fy; - m_dfx = m_saved_dfx; - m_dfy = m_saved_dfy; - m_ddfx = m_saved_ddfx; - m_ddfy = m_saved_ddfy; - } - - - - - - //------------------------------------------------------------------------ - unsigned curve4::vertex(double* x, double* y) - { - if(m_step < 0) return path_cmd_stop; - if(m_step == m_num_steps) - { - *x = m_start_x; - *y = m_start_y; - --m_step; - return path_cmd_move_to; - } - if(m_step == 0) - { - *x = m_end_x; - *y = m_end_y; - --m_step; - return path_cmd_line_to; - } - m_fx += m_dfx; - m_fy += m_dfy; - m_dfx += m_ddfx; - m_dfy += m_ddfy; - m_ddfx += m_dddfx; - m_ddfy += m_dddfy; - *x = m_fx; - *y = m_fy; - --m_step; - return path_cmd_line_to; - } - - - - -} - |