+//\r
+// Graphics primitives\r
+//\r
+// Various graphic functions that are slightly more complex than those that\r
+// come with various widget libraries.\r
+//\r
+// by James L. Hammons\r
+// (C) 2005 Underground Software\r
+//\r
+// JLH = James L. Hammons <jlhamm@acm.org>\r
+//\r
+// Who When What\r
+// --- ---------- -------------------------------------------------------------\r
+// JLH 03/14/1998 Created this file\r
+// JLH 01/20/2005 Converted to use wxWidgets\r
+// JLH 08/30/2008 Repurposed file to handle more than just bezier curves\r
+//\r
+\r
+#include "graphicprimitives.h"\r
+\r
+double abs(double n) // Helper function\r
+{\r
+ return (n < 0 ? -n : n);\r
+}\r
+\r
+//\r
+// This function takes three points and draws a curve using a second order\r
+// Bezier function.\r
+//\r
+void Bezier(wxDC &dc, point p1, point p2, point p3)\r
+{\r
+ double step = abs(p1.x - p3.x), tmp = abs(p1.y - p3.y);\r
+ step = (tmp > step ? tmp : step); // Get the larger of the two...\r
+ step = (step > 0 ? 1/step : 1); // & convert to valid step value\r
+\r
+ wxCoord prevX = (wxCoord)p1.x, prevY = (wxCoord)p1.y;\r
+\r
+ for(double u=0; u<=1; u+=step)\r
+ {\r
+ double _2u = 2*u, _uu = u*u, _2uu = 2*_uu;\r
+ double x = (p1.x * (1 - _2u + _uu)) + (p2.x * (_2u - _2uu)) + (p3.x * _uu);\r
+ double y = (p1.y * (1 - _2u + _uu)) + (p2.y * (_2u - _2uu)) + (p3.y * _uu);\r
+\r
+ dc.DrawLine(prevX, prevY, (wxCoord)x, (wxCoord)y);\r
+ prevX = (wxCoord)x, prevY = (wxCoord)y;\r
+ }\r
+\r
+ dc.DrawLine(prevX, prevY, (wxCoord)p3.x, (wxCoord)p3.y);\r
+}\r
+\r
+//\r
+// Draw a round dot (5x5, centered on [x, y])\r
+//\r
+void DrawRoundDot(wxDC &dc, int32 x, int32 y)\r
+{\r
+ wxPoint pt[8];\r
+\r
+ pt[0].x = x - 1, pt[0].y = y - 2;\r
+ pt[1].x = x + 1, pt[1].y = y - 2;\r
+ pt[2].x = x + 2, pt[2].y = y - 1;\r
+ pt[3].x = x + 2, pt[3].y = y + 1;\r
+ pt[4].x = x + 1, pt[4].y = y + 2;\r
+ pt[5].x = x - 1, pt[5].y = y + 2;\r
+ pt[6].x = x - 2, pt[6].y = y + 1;\r
+ pt[7].x = x - 2, pt[7].y = y - 1;\r
+\r
+ dc.DrawPolygon(8, pt);\r
+}\r
+\r
+//\r
+// Draw a sqaure dot (5x5, centered on [x, y])\r
+//\r
+void DrawSquareDot(wxDC &dc, int32 x, int32 y)\r
+{\r
+ wxPoint pt[4];\r
+\r
+ pt[0].x = x - 2, pt[0].y = y - 2;\r
+ pt[1].x = x + 2, pt[1].y = y - 2;\r
+ pt[2].x = x + 2, pt[2].y = y + 2;\r
+ pt[3].x = x - 2, pt[3].y = y + 2;\r
+\r
+ dc.DrawPolygon(4, pt);\r
+}\r
+\r
+//\r
+// Draw a sqaure dot (nxn, centered on [x, y])\r
+//\r
+void DrawSquareDotN(wxDC &dc, int32 x, int32 y, uint32 n)\r
+{\r
+ wxPoint pt[4];\r
+ uint32 offset = (n - 1) / 2;\r
+\r
+ pt[0].x = x - offset, pt[0].y = y - offset;\r
+ pt[1].x = x + offset, pt[1].y = y - offset;\r
+ pt[2].x = x + offset, pt[2].y = y + offset;\r
+ pt[3].x = x - offset, pt[3].y = y + offset;\r
+\r
+ dc.DrawPolygon(4, pt);\r
+}\r
+\r
+//\r
+// Draw a round dot (nxn, centered on [x, y])\r
+//\r
+void DrawRoundDotN(wxDC &dc, int32 x, int32 y, uint32 n)\r
+{\r
+ dc.DrawCircle(x, y, (n / 2) + 1);\r
+}\r