Java-Gaming.org    
Featured games (81)
games approved by the League of Dukes
Games in Showcase (498)
Games in Android Showcase (115)
games submitted by our members
Games in WIP (563)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Side scroller - collision detection  (Read 1253 times)
0 Members and 1 Guest are viewing this topic.
Offline Thinking

Senior Newbie




Java games rock!


« Posted 2004-11-23 18:55:19 »

Hello everyone.

I'm making a side scroller fighting game and I have
a couple of questions. I've got the sprite animation
working and I'm wondering if I should have gravity
built into the Sprite (base class) or have it as
a implementation detail. It got me thinking that I could
use setters for speed, jumping power,
animations, etc.. So you could just extend Sprite and use these methods in your constructor. Another approach is to create a ConfiguredSprite class that subclasses Sprite and add a constructor to ConfiguredSprite that accepts the file name of a sprite configuration file, and the ConfiguredSprite class does the parsing.

another problem I have is collision detection.
I first check for collisions with the bounding rectangles
of the sprites current images. And then if a collision occurs
I use pixel perfect collision detection. The problem is I don't know what to do once I know that they are colliding, how to line them up side by side is a problem.
Offline nonnus29

Senior Member




Giving Java a second chance after ludumdare fiasco


« Reply #1 - Posted 2004-11-24 14:47:02 »

I think the common consensus is to separate the graphical, physical, and behavior aspect of game entities.

So your sprite is the graphical representation.  You could have a bounding_box/physics object that interacts with other bb/physics objects, and a behavior object (accept user input for the player and an ai object of some sort for the npcs)

So the supposed class may look like:

1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
14  
15  
16  
17  
public class Fighter {
  private Sprite sprite;
  private PhysObj physobj;
  private Behavior behavior;

  public Fighter (Behavior b)  {
     behavior = b;
  }
  public void update(float deltaT)  {
     behavior.update();
     physobj.update(deltaT);
     sprite.setPosition(physobj);
  }
  public void draw(Graphics g)  {
     sprite.draw(g);
   }
}


Or whatever.

So far as collision detection and physics; thats a really big subject and my knowledge is not great and I'm tired of typing......
Offline Thinking

Senior Newbie




Java games rock!


« Reply #2 - Posted 2004-11-24 17:19:07 »

Thank you nonsus. That will really help clean up my Sprite class.  Smiley
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline Thinking

Senior Newbie




Java games rock!


« Reply #3 - Posted 2004-11-24 17:20:40 »

I'm really sorry nonnus, I apologize for miss-spelling your name.
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

radar3301 (12 views)
2014-09-21 23:33:17

BurntPizza (30 views)
2014-09-21 02:42:18

BurntPizza (19 views)
2014-09-21 01:30:30

moogie (20 views)
2014-09-21 00:26:15

UprightPath (27 views)
2014-09-20 20:14:06

BurntPizza (31 views)
2014-09-19 03:14:18

Dwinin (48 views)
2014-09-12 09:08:26

Norakomi (74 views)
2014-09-10 13:57:51

TehJavaDev (102 views)
2014-09-10 06:39:09

Tekkerue (50 views)
2014-09-09 02:24:56
List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50

List of Learning Resources
by SilverTiger
2014-07-31 16:26:06

List of Learning Resources
by SilverTiger
2014-07-31 11:54:12

HotSpot Options
by dleskov
2014-07-08 01:59:08
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!