get ground postion

[sudde gameeef]

how to get ground postion, no matter where your player is standing.

2d array: (0=sky, 1=ground, 2=player)

0001
2011
1111

so to get ground position i do this.

int map_height = a.length * tile_size;
int on_ground =  map_height - tile_size;

problem with above code is that it will only get me the last row postion and thats the ground postion. it wont take in count the ground above it.

so i did this in a loop. i am not sure what to do in if statment so it will give me ground postion, no matter where is player is standing.

for(int y = 0; y < a.length; y++)
  {
   for(int x = 0; x < a[y].length; x++)
     {   
      if(a[y][x] == 1)
       {
     on_ground = map_height - (tile_size * )
    }
      }
    }
 }  

[Greg Charles]

I would search for the player first. Once you find her, you might just have to subtract 1 from her height. Of course, that assumes that she's a well-grounded player.

I don't really understand either of your code snippets. "a" represents the array I guess. What's tile_size?

[sudde gameeef]

i just change some of the stuff.

tile_size = 32;

this code justt making a rectange where there is ground and storeing in arraylist

ArrayList<Rectangle> rect = new ...;
	public void store()
	{
		for(int y = 0; y < map01.length; y++)
		   {
		       for(int x = 0; x < map01[y].length; x++)
		       {
		            if(map01[y][x] == 1)
		            {
		            	rect.add(new Rectangle(
                               x*tile_size, y*tile_size, tile_size, tile_size));
	            }
	        }
	    }    
	}

getter

public ArrayList<Rectangle> getRect(){
 return rect; 
}

this code loop though arraylist and see is player is touching the rectanges in arraylist.

//p = player class

for(int i = 0; i < rect.size(); i++)
		{
			if(p.getBounds().intersects(this.getRect().get(i))) 
 //this will tell me if player is collision with map where there is '2'
			{
				on_ground = p.getY() + p.getHEIGHT(); 
//if player is touching the ground than set on_ground postion to player
//y  + player height. and that will give me ground postion  
			  
			}
              }

this code will find the ground no matter where is the player. bc i getting player y postion.

but the problem is that 1st player will be touch the ground(1) so it will get player y postion + height and thats the ground postion. if he moves right than there is another ground block on top. so he touchs that and moves the ground up. and so on...

now notic if player moves left than he is no ground under him and he is not touching any ground blocks. so he should fall down untill he touch another block. but this doesnt happed. he just stays there and no ground block under him.

i tried this but didnt worked i dont know why.

 
if(p.getBounds().intersects(this.getRect().get(i)))
//touching ground so move up
			{
				on_ground = p.getY() + p.getHEIGHT();  
			  
			}
elset            //not touching ground so move down
{
on_ground = p.getY() - p.getHEIGHT();  
}


it always goes in both if and else. i dont now why

[Campbell Ritchie]

sudde gameeef wrote: . . .

2d array: . . .

No, it isn’t. There is no such thing as a 2D array in Java. What you have is an array of arrays.

I have had to go back and correct some of the formatting errors in your post, because you have lines too long. I didn’t correct the inconsistent indentation, nor the use of tabs and spaces together, nor the identifier names which do not follow the conventions for this language.