Games/XInvaders3D/object.c

   1 /*------------------------------------------------------------------
   2   object.c:
   3
   4     XINVADERS 3D - 3d Shoot'em up
   5     Copyright (C) 2000 Don Llopis
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20
  21 ------------------------------------------------------------------*/
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <sys/types.h>
  25 #include "mat4x4.h"
  26 #include "vec4x1.h"
  27 #include "defines.h"
  28 #include "object.h"
  29
  30 /*================================================================*/
  31
  32 void Objlist_clear ( OBJLIST *lst )
  33 {
  34    lst->obj_count = 0;
  35    lst->head = NULL;
  36    lst->tail = NULL;
  37 }
  38
  39 /*================================================================*/
  40
  41 void Objlist_add ( OBJLIST *lst, OBJECT *obj )
  42 {
  43    OBJECT *tmp;
  44
  45    if ( lst->head )
  46    {
  47       tmp = lst->tail;
  48       lst->tail->next = obj;
  49       /* move tail forward */
  50       lst->tail = lst->tail->next;
  51       lst->tail->prev = tmp;
  52       lst->tail->next = NULL;
  53    }
  54    /* empty list so initialize head and tail */
  55    else
  56    {
  57       lst->head = lst->tail = obj;
  58       lst->head->prev = lst->tail->prev = NULL;
  59       lst->head->next = lst->tail->next = NULL;
  60    }
  61
  62    lst->obj_count++;
  63 }
  64
  65 /*================================================================*/
  66
  67 void Objlist_del ( OBJLIST *lst, OBJECT *obj )
  68 {
  69    if ( lst->head )
  70    {
  71       /* is the object at the head of the list */
  72       if ( obj->prev == NULL )
  73       {
  74          /* is object both at head and tail */
  75          if ( obj->next == NULL )
  76          {
  77             lst->head = lst->tail = NULL;
  78             obj->next = obj->prev = NULL;
  79          }
  80          else
  81          {
  82             lst->head = obj->next;
  83             lst->head->prev = NULL;
  84          }
  85       }
  86       /* is the object at the end of the list */
  87       else if ( obj->next == NULL )
  88       {
  89          lst->tail = obj->prev;
  90          lst->tail->next = NULL;
  91       }
  92       /* otherwise object somewhere in the list */
  93       else
  94       {
  95          obj->prev->next = obj->next;
  96          obj->next->prev = obj->prev;
  97       }
  98
  99       obj->next = obj->prev = NULL;
 100       lst->obj_count--;
 101    }
 102 }
 103
 104 /*================================================================*/
 105
 106 int Objlist_count ( OBJLIST *lst )
 107 {
 108    return lst->obj_count;
 109 }
 110
 111 /*================================================================*/
 112 OBJECT * Object_new ( void )
 113 {
 114    OBJECT *obj;
 115
 116    obj = ( OBJECT * ) malloc ( sizeof ( OBJECT ) );
 117
 118    return obj;
 119 }
 120 /*================================================================*/
 121
 122 void Object_delete ( OBJECT *obj )
 123 {
 124    free ( obj );
 125    obj = NULL;
 126 }
 127
 128 /*================================================================*/
 129
 130 void Object_init ( OBJECT *obj )
 131 {
 132    obj->active = FALSE;
 133    obj->frame = 0L;
 134    obj->delay = 0L;
 135    obj->max_frame = 0L;
 136
 137    obj->zone = 0L;
 138    obj->zheight = 0L;
 139
 140    Vector_init ( obj->pos );
 141    Vector_init ( obj->old_pos );
 142    Vector_init ( obj->dir );
 143    Vector_init ( obj->thrust );
 144
 145    obj->actionfn = NULL;
 146    obj->drawfn   = NULL;
 147
 148    obj->next = NULL;
 149    obj->prev = NULL;
 150 }
 151
 152 /*================================================================*/
 153
 154 void Object_set_actionfn ( OBJECT *obj, PFV1 actionfn )
 155 {
 156    obj->actionfn = actionfn;
 157 }
 158
 159 /*================================================================*/
 160
 161 void Object_set_drawfn ( OBJECT *obj, PFV2 drawfn )
 162 {
 163    obj->drawfn = drawfn;
 164 }
 165
 166 /*================================================================*/
 167
 168 void Object_set_model ( OBJECT *obj, MODEL *model )
 169 {
 170    obj->model = model;
 171 }
 172
 173 /*================================================================*/
 174
 175 void Object_set_pos ( OBJECT *obj, VECTOR4 pos )
 176 {
 177    Vector_copy ( pos, obj->pos );
 178 }
 179
 180 /*================================================================*/
 181 void Object_get_pos ( OBJECT *obj, VECTOR4 pos )
 182 {
 183    Vector_copy ( obj->pos, pos );
 184 }
 185
 186 /*================================================================*/
 187 void Object_set_dir  ( OBJECT *obj, VECTOR4 dir )
 188 {
 189    Vector_copy ( dir, obj->dir );
 190 }
 191
 192 /*================================================================*/
 193 void Object_get_dir  ( OBJECT *obj, VECTOR4 dir )
 194 {
 195    Vector_copy ( obj->dir, dir );
 196 }
 197
 198 /*================================================================*/
 199
 200 void Object_draw ( OBJECT *obj )
 201 {
 202 }
 203
 204 /*================================================================*/