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  Side scrolling collision detection & mob rendering  (Read 761 times)
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Offline rvandenberge

Junior Devvie


Projects: 1



« Posted 2013-07-12 09:15:05 »

Hello there,

I'm making a sidescrolling shooter game. When I added the sidescrolling functionality I stumbled upon LOTS of bugs. Collision detection was completely broke, and mob rendering was screwed up.

I don't really understand what the problem is since the X keeps updating, and when you move out of the frame the X value should know you're out of the frame.... buuuuttt I keep getting things as these: (this is on a multiplayer server, notice the difference between the two frames)


So I tried to do
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int renderingX = mob.getX() - translateX;
int renderingY = mob.getY() - translateY;


But that didn't work out either.

Also, collision detection is broke.. For some reason this function in the mob code would never return false anymore.
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public boolean mayMove(int x, int y, Level level, LevelState state)
   {
      rect.setBounds(x + state.translateX, y + state.translateY, getResource().getImage().getWidth(null), getResource().getImage().getHeight(null));

      for (Tile tile : level.getTiles())
      {
         boolean touchingRight = tile.asRectangle().intersects(rect);
         boolean touchingLeft = tile.asRectangle().intersects(rect);
         boolean touchingDown = tile.asRectangle().intersects(rect);
         boolean touchingUp = tile.asRectangle().intersects(rect);

         if (direction == Direction.RIGHT && touchingRight && tile.isSolid())
         {
            return false;
         }
         if (direction == Direction.LEFT && touchingLeft && tile.isSolid())
         {
            return false;
         }
         if (direction == Direction.DOWN && touchingDown && tile.isSolid())
         {
            return false;
         }
         if (direction == Direction.UP && touchingUp && tile.isSolid())
         {
            return false;
         }
      }
}


I really need some help because I cant understand why this doesnt work.

Thanks in advance!
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