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UTILITY.CPP
Package: openglsystem.rar　[view]
Upload User: nthssl
Upload Date: 2022-04-05
Package Size: 25357k
Code Size: 2k
Category:

OpenCV

Development Platform:

Visual C++

UTILITY.CPP：Code Content
  1. // Utility.cpp: implementation of the CUtility class.
  2. //
  3. //////////////////////////////////////////////////////////////////////
  5. #include "stdafx.h"
  6. #include "MyGame.h"
  7. #include "Utility.h"
  8. #include "string.h"
  9. #include <stdio.h>
  10. #include <stdarg.h>
  11. #include <assert.h>
  12. #include <math.h>
  13. #include "utility.h"
  15. #ifdef _DEBUG
  16. #undef THIS_FILE
  17. static char THIS_FILE[]=__FILE__;
  18. #define new DEBUG_NEW
  19. #endif
  21. //////////////////////////////////////////////////////////////////////
  22. // Construction/Destruction
  23. //////////////////////////////////////////////////////////////////////
  25. CUtility::CUtility()
  26. {
  28. }
  30. CUtility::~CUtility()
  31. {
  33. }
  35. void CUtility::PrintString(void *font, char *string)
  36. {
  37. int len,i;
  38. len=(int)strlen(string);
  39. for(i=0;i<len;i++)
  40. glutBitmapCharacter(font,string[i]);
  41. }
  42. void CUtility::glPrintf(int ScreenW,int ScreenH,GLuint x, GLuint y, int align, GLfloat scale, char* format, ...)
  43. {
  44.     va_list args;
  45.     char buffer[255], *p;
  46. int len;
  47. float dx=0;
  48.     GLfloat font_scale = 119.05f;
  49.     va_start(args, format);
  50.     vsprintf(buffer, format, args);
  51.     va_end(args);
  53. if(align) 
  54. {
  55. len=strlen(buffer);
  56. dx=((scale*len)/2)*104.76/119.05;
  57. }
  58.     glMatrixMode(GL_PROJECTION);
  59.     glPushMatrix();
  60.     glLoadIdentity();
  61. gluOrtho2D(0,ScreenW,0,ScreenH);
  63.     glMatrixMode(GL_MODELVIEW);
  64.     glPushMatrix();
  65.     glLoadIdentity();
  67.     glPushAttrib(GL_ENABLE_BIT);
  68.     glDisable(GL_LIGHTING);
  69.     glDisable(GL_TEXTURE_2D);
  70.     glEnable(GL_DEPTH_TEST);
  71.     glEnable(GL_LINE_SMOOTH);
  72.     glEnable(GL_BLEND);
  73.     glBlendFunc(GL_SRC_ALPHA, GL_ONE);
  74.     glTranslatef(x-dx, y, 0.0);
  76.     glScalef(scale/font_scale, scale/font_scale, scale/font_scale);
  78.     for(p = buffer; *p; p++)
  79. glutStrokeCharacter(GLUT_STROKE_MONO_ROMAN, *p);
  80.     glPopAttrib();
  82.     glPopMatrix();
  83.     glMatrixMode(GL_PROJECTION);
  84.     glPopMatrix();
  85.     glMatrixMode(GL_MODELVIEW);
  86. }
  89. float CUtility::FPS(int LastFrameTime)
  90. {
  91. static int LastTimes[10]={0,0,0,0,0,0,0,0,0,0};
  92. static int c=0;
  93. int i;
  94. float average=0;
  95. c=(c+1)%10;
  96. LastTimes[c]=LastFrameTime;
  98. for(i=0;i<10;i++)
  99. average+=LastTimes[i];
  100. return 1000.0/(average/10.0);
  101. }