KIKIMR-19287: add task_stats_drawing script

1 files changed, 258 insertions, 0 deletions

diff --git a/contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_bezier_arc.cpp b/contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_bezier_arc.cpp
new file mode 100644
index 0000000000..844d300c09
--- /dev/null
+++ b/contrib/python/matplotlib/py2/extern/agg24-svn/src/agg_bezier_arc.cpp
@@ -0,0 +1,258 @@
+//----------------------------------------------------------------------------
+// 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 generator. Produces at most 4 consecutive cubic bezier curves, i.e., 
+// 4, 7, 10, or 13 vertices.
+//
+//----------------------------------------------------------------------------
+
+
+#include <math.h>
+#include "agg_bezier_arc.h"
+
+
+namespace agg
+{
+
+    // This epsilon is used to prevent us from adding degenerate curves 
+    // (converging to a single point).
+    // The value isn't very critical. Function arc_to_bezier() has a limit 
+    // of the sweep_angle. If fabs(sweep_angle) exceeds pi/2 the curve 
+    // becomes inaccurate. But slight exceeding is quite appropriate.
+    //-------------------------------------------------bezier_arc_angle_epsilon
+    const double bezier_arc_angle_epsilon = 0.01;
+
+    //------------------------------------------------------------arc_to_bezier
+    void arc_to_bezier(double cx, double cy, double rx, double ry, 
+                       double start_angle, double sweep_angle,
+                       double* curve)
+    {
+        double x0 = cos(sweep_angle / 2.0);
+        double y0 = sin(sweep_angle / 2.0);
+        double tx = (1.0 - x0) * 4.0 / 3.0;
+        double ty = y0 - tx * x0 / y0;
+        double px[4];
+        double py[4];
+        px[0] =  x0;
+        py[0] = -y0;
+        px[1] =  x0 + tx;
+        py[1] = -ty;
+        px[2] =  x0 + tx;
+        py[2] =  ty;
+        px[3] =  x0;
+        py[3] =  y0;
+
+        double sn = sin(start_angle + sweep_angle / 2.0);
+        double cs = cos(start_angle + sweep_angle / 2.0);
+
+        unsigned i;
+        for(i = 0; i < 4; i++)
+        {
+            curve[i * 2]     = cx + rx * (px[i] * cs - py[i] * sn);
+            curve[i * 2 + 1] = cy + ry * (px[i] * sn + py[i] * cs);
+        }
+    }
+
+
+
+    //------------------------------------------------------------------------
+    void bezier_arc::init(double x,  double y, 
+                          double rx, double ry, 
+                          double start_angle, 
+                          double sweep_angle)
+    {
+        start_angle = fmod(start_angle, 2.0 * pi);
+        if(sweep_angle >=  2.0 * pi) sweep_angle =  2.0 * pi;
+        if(sweep_angle <= -2.0 * pi) sweep_angle = -2.0 * pi;
+
+        if(fabs(sweep_angle) < 1e-10)
+        {
+            m_num_vertices = 4;
+            m_cmd = path_cmd_line_to;
+            m_vertices[0] = x + rx * cos(start_angle);
+            m_vertices[1] = y + ry * sin(start_angle);
+            m_vertices[2] = x + rx * cos(start_angle + sweep_angle);
+            m_vertices[3] = y + ry * sin(start_angle + sweep_angle);
+            return;
+        }
+
+        double total_sweep = 0.0;
+        double local_sweep = 0.0;
+        double prev_sweep;
+        m_num_vertices = 2;
+        m_cmd = path_cmd_curve4;
+        bool done = false;
+        do
+        {
+            if(sweep_angle < 0.0)
+            {
+                prev_sweep  = total_sweep;
+                local_sweep = -pi * 0.5;
+                total_sweep -= pi * 0.5;
+                if(total_sweep <= sweep_angle + bezier_arc_angle_epsilon)
+                {
+                    local_sweep = sweep_angle - prev_sweep;
+                    done = true;
+                }
+            }
+            else
+            {
+                prev_sweep  = total_sweep;
+                local_sweep =  pi * 0.5;
+                total_sweep += pi * 0.5;
+                if(total_sweep >= sweep_angle - bezier_arc_angle_epsilon)
+                {
+                    local_sweep = sweep_angle - prev_sweep;
+                    done = true;
+                }
+            }
+
+            arc_to_bezier(x, y, rx, ry, 
+                          start_angle, 
+                          local_sweep, 
+                          m_vertices + m_num_vertices - 2);
+
+            m_num_vertices += 6;
+            start_angle += local_sweep;
+        }
+        while(!done && m_num_vertices < 26);
+    }
+
+
+
+
+    //--------------------------------------------------------------------
+    void bezier_arc_svg::init(double x0, double y0, 
+                              double rx, double ry, 
+                              double angle,
+                              bool large_arc_flag,
+                              bool sweep_flag,
+                              double x2, double y2)
+    {
+        m_radii_ok = true;
+
+        if(rx < 0.0) rx = -rx;
+        if(ry < 0.0) ry = -rx;
+
+        // Calculate the middle point between 
+        // the current and the final points
+        //------------------------
+        double dx2 = (x0 - x2) / 2.0;
+        double dy2 = (y0 - y2) / 2.0;
+
+        double cos_a = cos(angle);
+        double sin_a = sin(angle);
+
+        // Calculate (x1, y1)
+        //------------------------
+        double x1 =  cos_a * dx2 + sin_a * dy2;
+        double y1 = -sin_a * dx2 + cos_a * dy2;
+
+        // Ensure radii are large enough
+        //------------------------
+        double prx = rx * rx;
+        double pry = ry * ry;
+        double px1 = x1 * x1;
+        double py1 = y1 * y1;
+
+        // Check that radii are large enough
+        //------------------------
+        double radii_check = px1/prx + py1/pry;
+        if(radii_check > 1.0) 
+        {
+            rx = sqrt(radii_check) * rx;
+            ry = sqrt(radii_check) * ry;
+            prx = rx * rx;
+            pry = ry * ry;
+            if(radii_check > 10.0) m_radii_ok = false;
+        }
+
+        // Calculate (cx1, cy1)
+        //------------------------
+        double sign = (large_arc_flag == sweep_flag) ? -1.0 : 1.0;
+        double sq   = (prx*pry - prx*py1 - pry*px1) / (prx*py1 + pry*px1);
+        double coef = sign * sqrt((sq < 0) ? 0 : sq);
+        double cx1  = coef *  ((rx * y1) / ry);
+        double cy1  = coef * -((ry * x1) / rx);
+
+        //
+        // Calculate (cx, cy) from (cx1, cy1)
+        //------------------------
+        double sx2 = (x0 + x2) / 2.0;
+        double sy2 = (y0 + y2) / 2.0;
+        double cx = sx2 + (cos_a * cx1 - sin_a * cy1);
+        double cy = sy2 + (sin_a * cx1 + cos_a * cy1);
+
+        // Calculate the start_angle (angle1) and the sweep_angle (dangle)
+        //------------------------
+        double ux =  (x1 - cx1) / rx;
+        double uy =  (y1 - cy1) / ry;
+        double vx = (-x1 - cx1) / rx;
+        double vy = (-y1 - cy1) / ry;
+        double p, n;
+
+        // Calculate the angle start
+        //------------------------
+        n = sqrt(ux*ux + uy*uy);
+        p = ux; // (1 * ux) + (0 * uy)
+        sign = (uy < 0) ? -1.0 : 1.0;
+        double v = p / n;
+        if(v < -1.0) v = -1.0;
+        if(v >  1.0) v =  1.0;
+        double start_angle = sign * acos(v);
+
+        // Calculate the sweep angle
+        //------------------------
+        n = sqrt((ux*ux + uy*uy) * (vx*vx + vy*vy));
+        p = ux * vx + uy * vy;
+        sign = (ux * vy - uy * vx < 0) ? -1.0 : 1.0;
+        v = p / n;
+        if(v < -1.0) v = -1.0;
+        if(v >  1.0) v =  1.0;
+        double sweep_angle = sign * acos(v);
+        if(!sweep_flag && sweep_angle > 0) 
+        {
+            sweep_angle -= pi * 2.0;
+        } 
+        else 
+        if (sweep_flag && sweep_angle < 0) 
+        {
+            sweep_angle += pi * 2.0;
+        }
+
+        // We can now build and transform the resulting arc
+        //------------------------
+        m_arc.init(0.0, 0.0, rx, ry, start_angle, sweep_angle);
+        trans_affine mtx = trans_affine_rotation(angle);
+        mtx *= trans_affine_translation(cx, cy);
+        
+        for(unsigned i = 2; i < m_arc.num_vertices()-2; i += 2)
+        {
+            mtx.transform(m_arc.vertices() + i, m_arc.vertices() + i + 1);
+        }
+
+        // We must make sure that the starting and ending points
+        // exactly coincide with the initial (x0,y0) and (x2,y2)
+        m_arc.vertices()[0] = x0;
+        m_arc.vertices()[1] = y0;
+        if(m_arc.num_vertices() > 2)
+        {
+            m_arc.vertices()[m_arc.num_vertices() - 2] = x2;
+            m_arc.vertices()[m_arc.num_vertices() - 1] = y2;
+        }
+    }
+
+
+}