ObjManager.cpp

   1
   2 #include "nx.h"
   3 #include "common/llist.h"
   4 #include "ObjManager.h"
   5 #include "ObjManager.fdh"
   6
   7 static Object ZERO_OBJECT;
   8 static Player ZERO_PLAYER;
   9
  10 Object *firstobject = NULL, *lastobject = NULL;
  11 Object *lowestobject = NULL, *highestobject = NULL;
  12
  13 /*
  14 void c------------------------------() {}
  15 */
  16
  17 Object *CreateObject(int x, int y, int type, int xinertia, int yinertia,
  18                                         int dir, Object *linkedobject, uint32_t createflags)
  19 {
  20 Object *o;
  21
  22         // create the structure
  23         if (type != OBJ_PLAYER)
  24         {
  25                 o = new Object;
  26                 *o = ZERO_OBJECT;       // safely clears all members
  27         }
  28         else
  29         {
  30                 Player *p = new Player;
  31                 *p = ZERO_PLAYER;
  32                 o = (Object *)p;
  33         }
  34
  35         // initialize
  36         o->SetType(type);
  37         o->flags = objprop[type].defaultflags;
  38         o->DamageText = new FloatText(SPR_REDNUMBERS);
  39
  40         o->x = x - (sprites[o->sprite].spawn_point.x << CSF);
  41         o->y = y - (sprites[o->sprite].spawn_point.y << CSF);
  42         o->dir = dir;
  43         o->xinertia = xinertia;
  44         o->yinertia = yinertia;
  45         o->linkedobject = linkedobject;
  46
  47         // add into list
  48         LL_ADD_END(o, prev, next, firstobject, lastobject);
  49         LL_ADD_END(o, lower, higher, lowestobject, highestobject);
  50
  51         // set it's initial blocked states, but do not update blockedstates on objects starting
  52         // with nullsprite-- the reason is for objects whose sprite is set after being spawned
  53         if (o->sprite != SPR_NULL)
  54                 o->UpdateBlockStates(ALLDIRMASK);
  55
  56         if (!(createflags & CF_NO_SPAWN_EVENT))
  57                 o->OnSpawn();
  58
  59         return o;
  60 }
  61
  62 Object *CreateObject(int x, int y, int type)
  63 {
  64         return CreateObject(x, y, type, 0, 0, RIGHT, NULL, CF_DEFAULT);
  65 }
  66
  67 /*
  68 void c------------------------------() {}
  69 */
  70
  71 // update the blocked states of all objects
  72 void Objects::UpdateBlockStates(void)
  73 {
  74         Object *o = firstobject;
  75         while(o)
  76         {
  77                 o->lastblockl = o->blockl;
  78                 o->lastblockr = o->blockr;
  79                 o->lastblocku = o->blocku;
  80                 o->lastblockd = o->blockd;
  81
  82                 o->UpdateBlockStates(ALLDIRMASK);
  83                 o = o->next;
  84         }
  85 }
  86
  87 // returns true if the bounding boxes of the two given objects are touching
  88 bool hitdetect(Object *o1, Object *o2)
  89 {
  90 SIFSprite *s1, *s2;
  91 int32_t rect1x1, rect1y1, rect1x2, rect1y2;
  92 int32_t rect2x1, rect2y1, rect2x2, rect2y2;
  93
  94         // get the sprites used by the two objects
  95         s1 = o1->Sprite();
  96         s2 = o2->Sprite();
  97
  98         // get the bounding rectangle of the first object
  99         rect1x1 = o1->x + (s1->bbox.x1 << CSF);
 100         rect1x2 = o1->x + (s1->bbox.x2 << CSF);
 101         rect1y1 = o1->y + (s1->bbox.y1 << CSF);
 102         rect1y2 = o1->y + (s1->bbox.y2 << CSF);
 103
 104         // get the bounding rectangle of the second object
 105         rect2x1 = o2->x + (s2->bbox.x1 << CSF);
 106         rect2x2 = o2->x + (s2->bbox.x2 << CSF);
 107         rect2y1 = o2->y + (s2->bbox.y1 << CSF);
 108         rect2y2 = o2->y + (s2->bbox.y2 << CSF);
 109
 110         // find out if the rectangles overlap
 111         if ((rect1x1 < rect2x1) && (rect1x2 < rect2x1)) return false;
 112         if ((rect1x1 > rect2x2) && (rect1x2 > rect2x2)) return false;
 113         if ((rect1y1 < rect2y1) && (rect1y2 < rect2y1)) return false;
 114         if ((rect1y1 > rect2y2) && (rect1y2 > rect2y2)) return false;
 115
 116         return true;
 117 }
 118
 119 // returns true if the solidity boxes of the two given objects are touching
 120 bool solidhitdetect(Object *o1, Object *o2)
 121 {
 122 SIFSprite *s1, *s2;
 123 int32_t rect1x1, rect1y1, rect1x2, rect1y2;
 124 int32_t rect2x1, rect2y1, rect2x2, rect2y2;
 125
 126         // get the sprites used by the two objects
 127         s1 = o1->Sprite();
 128         s2 = o2->Sprite();
 129
 130         // get the bounding rectangle of the first object
 131         rect1x1 = o1->x + (s1->solidbox.x1 << CSF);
 132         rect1x2 = o1->x + (s1->solidbox.x2 << CSF);
 133         rect1y1 = o1->y + (s1->solidbox.y1 << CSF);
 134         rect1y2 = o1->y + (s1->solidbox.y2 << CSF);
 135
 136         // get the bounding rectangle of the second object
 137         rect2x1 = o2->x + (s2->solidbox.x1 << CSF);
 138         rect2x2 = o2->x + (s2->solidbox.x2 << CSF);
 139         rect2y1 = o2->y + (s2->solidbox.y1 << CSF);
 140         rect2y2 = o2->y + (s2->solidbox.y2 << CSF);
 141
 142         // find out if the rectangles overlap
 143         if ((rect1x1 < rect2x1) && (rect1x2 < rect2x1)) return false;
 144         if ((rect1x1 > rect2x2) && (rect1x2 > rect2x2)) return false;
 145         if ((rect1y1 < rect2y1) && (rect1y2 < rect2y1)) return false;
 146         if ((rect1y1 > rect2y2) && (rect1y2 > rect2y2)) return false;
 147
 148         return true;
 149 }
 150
 151 /*
 152 void c------------------------------() {}
 153 */
 154
 155 // runs all entity AI routines
 156 void Objects::RunAI(void)
 157 {
 158 Object *o;
 159
 160         // because we handle objects in order of their creation and have a separate list
 161         // for display order, we can't ever run AI twice in a frame because of z-order
 162         // rearrangement, and 2) objects created by other objects are added to the end of
 163         // the list and given a chance to run their AI routine before being displayed.
 164         FOREACH_OBJECT(o)
 165         {
 166                 if (!o->deleted)
 167                         o->RunAI();
 168         }
 169 }
 170
 171
 172 // the most important thing it does is apply x/y inertia to the objects.
 173 void Objects::PhysicsSim(void)
 174 {
 175 Object *o;
 176 int xinertia, yinertia;
 177
 178         FOREACH_OBJECT(o)
 179         {
 180                 if (o != player && !o->deleted)         // player is moved in PDoPhysics
 181                 {
 182                         if (!(o->flags & FLAG_IGNORE_SOLID) && \
 183                                 !(o->nxflags & NXFLAG_NO_RESET_YINERTIA))
 184                         {
 185                                 if (o->blockd && o->yinertia > 0) o->yinertia = 0;
 186                                 if (o->blocku && o->yinertia < 0) o->yinertia = 0;
 187                         }
 188
 189                         // apply inertia to X,Y position
 190                         xinertia = o->xinertia;
 191                         yinertia = o->yinertia;
 192                         if (o->shaketime)
 193                         {
 194                                 if (o->nxflags & NXFLAG_SLOW_X_WHEN_HURT) xinertia >>= 1;
 195                                 if (o->nxflags & NXFLAG_SLOW_Y_WHEN_HURT) yinertia >>= 1;
 196                         }
 197
 198                         o->apply_xinertia(xinertia);
 199                         o->apply_yinertia(yinertia);
 200
 201                         // flag_solid_brick objects push player as they move
 202                         if (o->flags & FLAG_SOLID_BRICK)
 203                         {
 204                                 o->PushPlayerOutOfWay(xinertia, yinertia);
 205                         }
 206                         else if (o->damage > 0)
 207                         {
 208                                 // have enemies hurt you when you touch them
 209                                 // (solid-brick objects do this in PHandleSolidBrickObjects)
 210                                 if (hitdetect(o, player))
 211                                         o->DealContactDamage();
 212                         }
 213                 }
 214         }
 215 }
 216
 217 /*
 218 void c------------------------------() {}
 219 */
 220
 221 // returns how many objects exist of the given type
 222 int Objects::CountType(int objtype)
 223 {
 224         int count = 0;
 225         Object *o;
 226
 227         FOREACH_OBJECT(o)
 228         {
 229                 if (o->type == objtype)
 230                         count++;
 231         }
 232
 233         return count;
 234 }
 235
 236 // returns the first object of type objtype or NULL
 237 Object *Objects::FindByType(int objtype)
 238 {
 239         Object *o;
 240         FOREACH_OBJECT(o)
 241         {
 242                 if (o->type == objtype)
 243                         return o;
 244         }
 245
 246         return NULL;
 247 }
 248
 249 /*
 250 void c------------------------------() {}
 251 */
 252
 253 // free objects deleted earlier via ObjDel
 254 void Objects::CullDeleted(void)
 255 {
 256 Object *o, *next;
 257
 258         o = firstobject;
 259         while(o)
 260         {
 261                 next = o->next;
 262
 263                 if (o->deleted)
 264                 {
 265                         o->Destroy();
 266                 }
 267
 268                 o = next;
 269         }
 270 }
 271
 272 // deletes all objects. if delete_player is true, also deletes the player.
 273 // used by load_pxe to reset the game in preperation for loading a new maplayer->
 274 void Objects::DestroyAll(bool delete_player)
 275 {
 276 Object *o, *next;
 277
 278         o = firstobject;
 279         while(o)
 280         {
 281                 next = o->next;
 282
 283                 if (o != player)
 284                 {
 285                         o->Destroy();
 286                 }
 287
 288                 o = next;
 289         }
 290
 291         // must do this last to avoid crashes as player ptr gets invalidated
 292         if (delete_player)
 293         {
 294                 player->Destroy();
 295         }
 296
 297         memset(ID2Lookup, 0, sizeof(ID2Lookup));
 298 }
 299
 300