src/CSprite.cpp

   1 /*
   2 Copyright (C) 2004 Parallel Realities
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 #include "headers.h"
  22
  23 /**
  24 * Creates a new Sprite object
  25 */
  26 Sprite::Sprite()
  27 {
  28         for (int i = 0 ; i < 8 ; i++)
  29         {
  30                 image[i] = NULL;
  31                 frameLength[i] = 0;
  32         }
  33
  34         currentFrame = 0;
  35         currentTime = 0;
  36         maxFrames = 0;
  37
  38         next = NULL;
  39
  40         randomFrames = false;
  41 }
  42
  43 /**
  44 * Sets the specified train with the specified image with
  45 * a specified time
  46 * @param i The index of the frame to set (0 - 7)
  47 * @param shape The image to be used
  48 * @param time How long this frame will last
  49 */
  50 void Sprite::setFrame(int i, SDL_Surface *shape, int time)
  51 {
  52         image[i] = shape;
  53         frameLength[i] = time;
  54
  55         currentFrame = 0;
  56         currentTime = frameLength[0];
  57
  58         if (i > maxFrames)
  59                 maxFrames = i;
  60 }
  61
  62 void Sprite::animate()
  63 {
  64         currentTime--;
  65
  66         if (currentTime > 0)
  67                 return;
  68
  69         currentFrame++;
  70
  71         if (currentFrame == 8)
  72                 currentFrame = 0;
  73
  74         if (frameLength[currentFrame] == 0)
  75                 currentFrame = 0;
  76
  77         currentTime = frameLength[currentFrame];
  78 }
  79
  80 void Sprite::getNextFrame(unsigned char *frame, unsigned char *time)
  81 {
  82         if (*frame >= 8)
  83                 *frame = 0;
  84
  85         if (frameLength[*frame] == 0)
  86                 *frame = 0;
  87
  88         *time = frameLength[*frame];
  89 }
  90
  91 SDL_Surface *Sprite::getCurrentFrame()
  92 {
  93         return image[currentFrame];
  94 }
  95
  96 void Sprite::free()
  97 {
  98         for (int i = 0 ; i < 8 ; i++)
  99         {
 100                 if (image[i] != NULL)
 101                 {
 102                         SDL_FreeSurface(image[i]);
 103                         image[i] = NULL;
 104                         frameLength[i] = 0;
 105                 }
 106         }
 107
 108         currentFrame = 0;
 109         currentTime = 0;
 110         maxFrames = 0;
 111 }