Category

Development Platform
Home > SourceCode/Document > Game Program > Game Engine > View Code
Camera.cpp
Package: 3dexplorerTest.rar　[view]
Upload User: hkb425
Upload Date: 2007-06-16
Package Size: 34191k
Code Size: 2k
Category:

Game Engine

Development Platform:

Visual C++

Camera.cpp：Code Content
  1. // Camera.cpp: implementation of the CCamera class.
  2. //
  3. //////////////////////////////////////////////////////////////////////
  5. #include "stdafx.h"
  6. #include "Camera.h"
  7. //////////////////////////////////////////////////////////////////////
  8. // Construction/Destruction
  9. //////////////////////////////////////////////////////////////////////
  11. CCamera::CCamera()
  12. {
  13.     m_CamPos=VERTEX(10,0,10);
  14.     m_CamDirection=NORMAL(1,0,0);
  15. m_CamRotY=0;
  16. }
  18. CCamera::~CCamera()
  19. {
  20. }
  21. void CCamera::SetCamera(VERTEX position,float rotY)
  22. {
  23.     m_CamPos=position;
  24. m_CamRotY=rotY;
  26. m_CamDirection=NORMAL(-sinf(rotY*0.0174533f),
  27.                   0,
  28.   -cosf(rotY*0.0174533f));
  29. m_CamDirection=math.Normalization(m_CamDirection);
  30. }
  32. void CCamera::SetCamera(VERTEX newFoucs)
  33. {
  34. m_CamDirection=NORMAL(newFoucs.xpos-m_CamPos.xpos,0,newFoucs.zpos-m_CamPos.zpos);
  35. m_CamDirection=math.Normalization(m_CamDirection);
  36. m_CamRotY=acosf(-m_CamDirection.nz/float(sqrt(m_CamDirection.nz*m_CamDirection.nz+m_CamDirection.nx*m_CamDirection.nx)))*57.29578f;
  37. if(m_CamDirection.nx>0)m_CamRotY=360-m_CamRotY;
  38. }
  39. void   CCamera::SetCameraRotate(float yrot)
  40. {
  41. if(yrot>360 || yrot<0)yrot=0;
  42. m_CamRotY=yrot;
  43. }
  44. void   CCamera::SetCameraPosition(VERTEX pos)
  45. {
  46.     m_CamPos=pos;
  47. }
  48. float CCamera::GetDistance(VERTEX pos)
  49. {
  50. float dx=(m_CamPos.xpos>pos.xpos)?(m_CamPos.xpos-pos.xpos):(pos.xpos-m_CamPos.xpos);
  51. // float dy=(m_CamPos.ypos>pos.ypos)?(m_CamPos.ypos-pos.ypos):(pos.ypos-m_CamPos.ypos);
  52. float dz=(m_CamPos.zpos>pos.zpos)?(m_CamPos.zpos-pos.zpos):(pos.zpos-m_CamPos.zpos);
  54.     return dx+dz;
  55. }
  56. bool CCamera::IsEnemyInFrustum(VERTEX enemyPos)
  57. {
  58.     float cosValue=math.GetTwoVectorAngleCosine(NORMAL(enemyPos.xpos-m_CamPos.xpos,
  59.                                  enemyPos.ypos -m_CamPos.ypos,
  60.  enemyPos.zpos-m_CamPos.zpos ) , 
  61.  m_CamDirection);
  62. if(cosValue>0)  ///////// In camera
  63. {
  64. return true;
  65. }
  66.     return false; ///// out of camera
  67. }