Category

Development Platform
Home > SourceCode/Document > Graph program > OpenGL program > View Code
Particle.cpp
Package: OpenGL动画演示(包含代码).rar　[view]
Upload User: sz83729876
Upload Date: 2013-03-07
Package Size: 4140k
Code Size: 2k
Category:

OpenGL program

Development Platform:

Windows_Unix

Particle.cpp：Code Content
  1. //
  2. // a64ki
  3. // Copyright (c) 2002 Henrik Carlgren
  4. // http://ziruz.cjb.net
  5. // ziruz@hotpop.com
  6. //
  10. //
  11. // INCLUDE FILES
  12. //
  14. #include "particle.h"
  16. #include <stdlib.h>
  18. #include <cmath>
  22. //
  23. // CLASS: PARTICLE
  24. // METHOD: birth
  25. //
  27. void PARTICLE::birth(void)
  28. {
  30. currentAge = 0;
  32. maximumAge = rand() % (ageRangeMaximum - ageRangeMinimum + 1) + ageRangeMinimum;
  34. position = *targetPosition;
  36. position.x = position.x + (float)(rand() % 100 - 50)*0.002f;
  38. position.y = position.y + (float)(rand() % 100 - 50)*0.002f;
  40. position.z = position.z + (float)(rand() % 100 - 50)*0.002f;
  42. velocity = *targetVelocity;
  44. float angle = (float)(rand()%36000) / 100.0f;
  46. velocity.x = velocity.x + 0.0005f * (float)cos(angle);
  48. velocity.y = velocity.y + 0.0005f * (float)sin(angle);
  50. velocity.z = velocity.z + 0.0005f * (float)cos(angle);
  52. impulse = *targetImpulse;
  54. impulse.x += (float)(rand()%13-6)/4444.0f;
  56. impulse.y += (float)(rand()%13-6)/4444.0f;
  58. impulse.z += (float)(rand()%13-6)/4444.0f;
  60. }
  64. //
  65. // CLASS: PARTICLE
  66. // METHOD: update
  67. //
  69. void PARTICLE::update(long double delta)
  70. {
  71. currentAge += delta;
  73. if(currentAge > maximumAge)
  74. birth();
  76. position.x += (velocity.x + impulse.x) * (float)delta;
  78. position.y += (velocity.y + impulse.y) * (float)delta;
  80. position.z += (velocity.z + impulse.z) * (float)delta;
  82. impulse.x -= (float)delta*(impulse.x/512);
  84. impulse.y -= (float)delta*(impulse.y/512);
  86. impulse.z -= (float)delta*(impulse.z/512);
  88. }