src/partmang.cpp

   1 // -----------------------------------------------
   2 // partmang.cpp
   3 // -----------------------------------------------
   4 // Particle manager, to control particles in the game
   5 // Also, implementation of base particle
   6 // -----------------------------------------------
   7 // Developed By Kronoman - Copyright (c) 2004
   8 // In loving memory of my father
   9 // -----------------------------------------------
  10
  11 #include "partmang.h"
  12 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  13 // The base particle, a dot
  14 // This particle must be used as base
  15 // for making other types of particles, using
  16 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  17 CBaseParticle::CBaseParticle()
  18 {
  19         x = 0.0;
  20         y = 0.0;
  21         dx = 0.0;
  22         dy = 0.0;
  23         color = 0;
  24         life = 0;
  25 }
  26
  27 CBaseParticle::CBaseParticle(float x1, float y1, float dx1, float dy1, int color1, int life1)
  28 {
  29         x = x1;
  30         y = y1;
  31         dx = dx1;
  32         dy = dy1;
  33         color = color1;
  34         life = life1;
  35 }
  36
  37 CBaseParticle::~CBaseParticle()
  38 {
  39         // nothing to be done here
  40 }
  41 // -----------------------------------------------
  42 // updates particle's logic,
  43 // must return TRUE if particle is dead
  44 // (particle WILL be _deleted_ from memory
  45 // by manager if dead)
  46 // -----------------------------------------------
  47 bool CBaseParticle::update_logic(CParticleManager &particle_manager)
  48 {
  49         // nothing to be done here, all that this particle needs is taken into account by manager :^D
  50         return false; // I'm not dead (the manager will take care of disccount my life)
  51 }
  52
  53 // -----------------------------------------------
  54 // renders particle on bmp, displaced by x,y
  55 // -----------------------------------------------
  56 void CBaseParticle::render_particle(BITMAP *bmp, int xd, int yd)
  57 {
  58         putpixel(bmp, (int)x - xd, (int)y - yd, color);
  59 }
  60
  61 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  62 // The particle manager
  63 // This handles a bunch of particles
  64 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  65 CParticleManager::CParticleManager()
  66 {
  67         add_x = add_y = 0.0;
  68         add_dx = add_dy = 0.0;
  69 }
  70
  71 CParticleManager::~CParticleManager()
  72 {
  73         nuke_particle_list(); // our precious RAM needs freedom! Viva la revolucion de la RAM!
  74 }
  75
  76 // -----------------------------------------------
  77 // this will free all memory used by particles,
  78 // and particles itself.
  79 // -----------------------------------------------
  80 void CParticleManager::nuke_particle_list()
  81 {
  82         list<CBaseParticle *>::iterator i = particle_list.begin(); // iterator for our linked list of particle pointers
  83
  84         for (i = particle_list.begin(); i != particle_list.end(); i++)
  85                 delete (*i); // delete object
  86
  87         // clear the list
  88         particle_list.clear();
  89 }
  90
  91 // -----------------------------------------------
  92 // adds a particle to manager (the particle
  93 // WILL be nuked automatically when
  94 // the manager object gets deleted)
  95 // -----------------------------------------------
  96 void CParticleManager::add_particle(CBaseParticle *node)
  97 {
  98         particle_list.push_back(node);
  99 }
 100
 101 // -----------------------------------------------
 102 // updates logic of all particles
 103 // -----------------------------------------------
 104 void CParticleManager::update_logic()
 105 {
 106         list<CBaseParticle *>::iterator i = particle_list.begin(); // iterator for our linked list of particle pointers
 107
 108         while (i != particle_list.end())
 109         {
 110                 // apply wind, and gravity, and own movement of particle
 111                 (*i)->dx += add_dx;
 112                 (*i)->dy += add_dy;
 113                 (*i)->x += add_x + (*i)->dx;
 114                 (*i)->y += add_y + (*i)->dy;
 115
 116                 // decrease life of particle
 117                 (*i)->life--;
 118
 119                 if ((*i)->update_logic(*this) || ((*i)->life < 0))
 120                 {
 121                         list<CBaseParticle *>::iterator i2 = i;
 122                         // particle is dead, erase it
 123                         i++;
 124                         delete (*i2);
 125                         particle_list.erase(i2);
 126                 }
 127                 else
 128                 {
 129                         i++; // next
 130                 }
 131         }
 132
 133 }
 134
 135 // -----------------------------------------------
 136 // renders particles on bmp, displaced by x,y
 137 // -----------------------------------------------
 138 void CParticleManager::render(BITMAP *bmp, int x, int y)
 139 {
 140         list<CBaseParticle *>::iterator i = particle_list.begin(); // iterator for our linked list of particle pointers
 141
 142         for (i = particle_list.begin(); i != particle_list.end(); i++)
 143                 (*i)->render_particle(bmp, x, y); // renders particle on bmp, displaced by x,y
 144 }
 145