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SkyBox.cpp
资源名称：虚拟地形建模.rar　[点击查看]
上传用户：dfjhuyju
上传日期：2013-03-13
资源大小：11035k
文件大小：5k
源码类别：

OpenGL

开发平台：

Visual C++

SkyBox.cpp：源码内容
  1. // SkyBox.cpp: implementation of the CSkyBox class.
  2. //
  3. //////////////////////////////////////////////////////////////////////
  4. #include "stdafx.h"
  5. #include "SkyBox.h"
  6. //////////////////////////////////////////////////////////////////////
  7. // Construction/Destruction
  8. //////////////////////////////////////////////////////////////////////
  10. CSkyBox::CSkyBox()
  11. {
  12. }
  13. CSkyBox::~CSkyBox()
  14. {
  15. }
  16. bool CSkyBox::InitSkyBox(int XLenght, int YLenght,int ZLenght,
  17.  int CenterX,int CenterY,int CenterZ)
  18. {
  19. m_XLength=XLenght;
  20. m_YLength=YLenght;
  21. m_ZLength=ZLenght;
  22. m_CenterX=CenterX;
  23. m_CenterY=CenterY;
  24. m_CenterZ=CenterZ;
  26. texSky[0] = CreateTexture("Sky\skyb0.bmp");
  27. texSky[1] = CreateTexture("Sky\skyb1.bmp");
  28. texSky[2] = CreateTexture("Sky\skyb2.bmp");
  29. texSky[3] = CreateTexture("Sky\skyb3.bmp");
  30. texSky[4] = CreateTexture("Sky\skyb4.bmp");
  31. texSky[5] = CreateTexture("Sky\ground.bmp");
  33. return true;
  34. }
  35. void CSkyBox::DrawSkyBox()
  36. {
  37. int lx,ly,lz,cx,cy,cz;
  38. lx=m_XLength;
  39. ly=m_YLength;
  40. lz=m_ZLength;
  41. cx=m_CenterX;
  42. cy=m_CenterY;
  43. cz=m_CenterZ;
  45. float btmy=0.0f;//This variable indicate how much texture should be cut from 0 to btmy
  46. //  glDisable(GL_FOG); 
  47. ////////front
  48.   glBindTexture(GL_TEXTURE_2D, texSky[0]);
  49.     glEnable(GL_TEXTURE_2D); 
  50.    glBegin(GL_QUADS);
  51.             glTexCoord2f(0,btmy);
  52.     glVertex3i(-lx+cx, cy,   -lz+cz);
  54.              glTexCoord2f(1,btmy);
  55.     glVertex3i(lx+cx, cy,   -lz+cz);
  57.             glTexCoord2f(1,1);
  58.     glVertex3i(lx+cx, ly+cy,   -lz+cz);
  60.             glTexCoord2f(0,1);
  61.     glVertex3i(-lx+cx, ly+cy,    -lz+cz);
  62.             glEnd();
  63. glDisable(GL_TEXTURE_2D); 
  64. ///     ////////////////sky1
  65. /////////////////right
  66. glBindTexture(GL_TEXTURE_2D, texSky[1]);
  67.     glEnable(GL_TEXTURE_2D); 
  68.   
  69. glBegin(GL_QUADS);
  70.             glTexCoord2f(0,btmy);
  71.     glVertex3i(lx+cx, cy,    -lz+cz);
  73.              glTexCoord2f(1,btmy);
  74.     glVertex3i(lx+cx, cy,    lz+cz);
  76.             glTexCoord2f(1,1);
  77.     glVertex3i(lx+cx, ly+cy,    lz+cz);
  79.             glTexCoord2f(0,1);
  80.     glVertex3i(lx+cx, ly+cy,    -lz+cz);
  81.             glEnd();
  82. glDisable(GL_TEXTURE_2D); 
  83. ///     ////////////////sky2
  84. //////////////back
  85. glBindTexture(GL_TEXTURE_2D, texSky[2]);
  86.     glEnable(GL_TEXTURE_2D); 
  87.  
  88. glBegin(GL_QUADS);
  89.             glTexCoord2f(0,btmy);
  90.     glVertex3i(lx+cx, cy,    lz+cz);
  92.              glTexCoord2f(1,btmy);
  93.     glVertex3i(-lx+cx, cy,    lz+cz);
  95.             glTexCoord2f(1,1);
  96.     glVertex3i(-lx+cx, ly+cy,    lz+cz);
  98.             glTexCoord2f(0,1);
  99.     glVertex3i(lx+cx, ly+cy,    lz+cz);
  100.             glEnd();
  101. glDisable(GL_TEXTURE_2D); 
  102. ///     ////////////////sky3
  103. ////////////////left
  104. glBindTexture(GL_TEXTURE_2D, texSky[3]);
  105.     glEnable(GL_TEXTURE_2D); 
  106.        glBegin(GL_QUADS);
  107.             glTexCoord2f(0,btmy);
  108.     glVertex3i(-lx+cx, cy,    lz+cz);
  110.              glTexCoord2f(1,btmy);
  111.     glVertex3i(-lx+cx, cy,    -lz+cz);
  113.             glTexCoord2f(1,1);
  114.     glVertex3i(-lx+cx, ly+cy,    -lz+cz);
  116.             glTexCoord2f(0,1);
  117.     glVertex3i(-lx+cx, ly+cy,    lz+cz);
  118.             glEnd();
  119. glDisable(GL_TEXTURE_2D); 
  120. ///     ////////////////sky4
  121. /////////////up
  122. glBindTexture(GL_TEXTURE_2D, texSky[4]);
  123.     glEnable(GL_TEXTURE_2D); 
  125. glBegin(GL_QUADS);
  126.             glTexCoord2f(0,0);
  127.     glVertex3i(-lx+cx, ly+cy,    -lz+cz);
  129.              glTexCoord2f(1,0);
  130.     glVertex3i(lx+cx,ly+cy,    -lz+cz);
  132.             glTexCoord2f(1,1);
  133.     glVertex3i(lx+cx, ly+cy,    lz+cz);
  135.             glTexCoord2f(0,1);
  136.     glVertex3i(-lx+cx, ly+cy,    lz+cz);
  137.             glEnd();
  138. glDisable(GL_TEXTURE_2D);
  140. ///////地面
  142. glBindTexture(GL_TEXTURE_2D, texSky[5]);
  143.     glEnable(GL_TEXTURE_2D); 
  145. glBegin(GL_QUADS);
  146.             glTexCoord2f(0,0);
  147.     glVertex3i(-lx+cx, cy,    -lz+cz);
  149.              glTexCoord2f(1,0);
  150.     glVertex3i(lx+cx,cy,    -lz+cz);
  152.             glTexCoord2f(1,1);
  153.     glVertex3i(lx+cx, cy,    lz+cz);
  155.             glTexCoord2f(0,1);
  156.     glVertex3i(-lx+cx, cy,    lz+cz);
  157.             glEnd();
  158. glDisable(GL_TEXTURE_2D);
  159. }
  163. GLuint CSkyBox::CreateTexture( CString filename )
  164. {
  166.     GLuint      texture;     
  168. _AUX_RGBImageRec *Image;
  170.     Image = auxDIBImageLoadA( (const char*) filename );
  173.     glGenTextures(1, &texture);
  174.     glBindTexture(GL_TEXTURE_2D, texture);
  176.    
  177.    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,GL_CLAMP);
  178. glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,GL_CLAMP);
  180. glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_NEAREST);
  181. glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
  182. glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
  183. glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
  185. gluBuild2DMipmaps(GL_TEXTURE_2D, 3, Image->sizeX,
  186.                               Image->sizeY, GL_RGB,
  187.                               GL_UNSIGNED_BYTE, Image->data);
  188.    
  189.    delete Image;
  191. return texture;
  193. }