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MirrorShape.cpp
Package: CAD.zip　[view]
Upload User: hehe2haha
Upload Date: 2013-08-16
Package Size: 161k
Code Size: 2k
Category:

CAD

Development Platform:

Visual C++

MirrorShape.cpp：Code Content
  1. // MirrorShape.cpp: implementation of the MirrorShape class.
  2. //
  3. //////////////////////////////////////////////////////////////////////
  5. #include "stdafx.h"
  6. #include "MirrorShape.h"
  8. //////////////////////////////////////////////////////////////////////
  9. // Construction/Destruction
  10. //////////////////////////////////////////////////////////////////////
  12. CMirrorShape::CMirrorShape()
  13. {
  14. SinAngle = 0;
  15. CosAngle = 0;
  16. TgAngle  = 0;
  17. }
  21. CMirrorShape::~CMirrorShape()
  22. {
  24. }
  26. void CMirrorShape::SetSinCos(POINT BeginPos, POINT EndPos)
  27. {
  28. int Length = CDraw::Distance(BeginPos,EndPos);
  29. if (Length != 0)
  30. {
  31. //求参考线与X轴夹角的正弦、余弦
  32. SinAngle = (double)(EndPos.y - BeginPos.y) / Length;
  33. CosAngle = (double)(EndPos.x - BeginPos.x) / Length;
  35. //参考线与Y轴平行
  36. if (EndPos.x == BeginPos.x && EndPos.y != BeginPos.y);
  37. else
  38. {
  39. //求参考线与X轴夹角的正切
  40. TgAngle = (double)(EndPos.y - BeginPos.y) / (EndPos.x - BeginPos.x);
  41. }
  42. }
  43. }
  45. void CMirrorShape::SetMirrorPos(POINT BeginPos, POINT EndPos)
  46. {
  47. double Length  = 0.0;
  48. double xOffset = 0.0;
  49. double yOffset = 0.0;
  51. MirrorBeginPos = SourceBeginPos;
  52. MirrorEndPos   = SourceEndPos;
  54. //参考线与Y轴平行
  55. if (EndPos.x == BeginPos.x && EndPos.y != BeginPos.y)
  56. {
  57. xOffset = (double)2 * (BeginPos.x - SourceBeginPos.x);
  59. MirrorBeginPos.x += (long)xOffset;
  61. xOffset = (double)2 * (BeginPos.x - SourceEndPos.x);
  63. MirrorEndPos.x += (long)xOffset;
  65. }
  66. else
  67. {
  68. Length = BeginPos.y + TgAngle * (SourceBeginPos.x - BeginPos.x);
  69. Length = SourceBeginPos.y - Length;
  70. Length = Length * CosAngle;
  72. xOffset = 2 * Length * SinAngle;
  73. yOffset = 2 * Length * CosAngle;
  75. MirrorBeginPos.x += (long)xOffset;
  76. MirrorBeginPos.y -= (long)yOffset;
  78. Length = BeginPos.y + TgAngle * (SourceEndPos.x - BeginPos.x);
  79. Length = SourceEndPos.y - Length;
  80. Length = Length * CosAngle;
  82. xOffset = 2 * Length * SinAngle;
  83. yOffset = 2 * Length * CosAngle;
  85. MirrorEndPos.x += (long)xOffset; 
  86. MirrorEndPos.y -= (long)yOffset; 
  87. }
  89. }