scolling 2D tiles as a whole? - GameCreators Forum

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steakyfask

13

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Joined: 9th Jan 2011

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Posted: 15th Aug 2011 04:47

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Hi, I know there are lots of posts on using 2D tilesets but I just can't get this right. I want my background to move and not the player ...

I Have my tileset.

I use dbCreateAnimatedSprite()
then inside my loop I create a 2D array for my tiles and then display using a for loop.

My problem is that I can't seem to move my tiles as a whole. any help please?

Here is my code so far.

#include "library.h"

void DarkGDK(void) 
{
	dbSyncOn(); 
	dbSyncRate(60);
	dbDisableEscapeKey();
	dbSetImageColorKey(255,255,255);

PLAYER player;
player.SetPosition(100,100);

dbLoadImage("tiles.png",2);
dbCreateAnimatedSprite(2,"tiles.png",4,2,2);

while ( LoopGDK() )
{

player.PlayerMovement();

int map[10][32] = 
{
{1,1,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3},
{3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3},
{3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},

};

for (int y=0; y<10 ;++y)
	
	for(int x=0;x<32; ++x)
	{
		dbSetSpriteFrame(2,map[y][x]);
		dbPasteSprite(2,x*21,y*27);
		
		
		if (dbUpKey()==1)
		{
			//Move tiles??
				
		}
				
	}

if(dbEscapeKey() == 1)
		{
			break;
		}
		dbSync();

}

for (int i = 1; i < 10; i ++)
	{
	dbDeleteImage (i);
	dbDeleteSprite(i);
	}

return;

}

+ Code Snippet

#include "library.h" 

void DarkGDK(void) 
{
	dbSyncOn(); 
	dbSyncRate(60);
	dbDisableEscapeKey();
	dbSetImageColorKey(255,255,255);


	
PLAYER player;
player.SetPosition(100,100);


dbLoadImage("tiles.png",2);
dbCreateAnimatedSprite(2,"tiles.png",4,2,2);


while ( LoopGDK() )
{

	
player.PlayerMovement();	




	

int map[10][32] = 
{
{1,1,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3},
{3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3},
{3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},

};



	for (int y=0; y<10 ;++y)
	
	for(int x=0;x<32; ++x)
	{
		dbSetSpriteFrame(2,map[y][x]);
		dbPasteSprite(2,x*21,y*27);
		
		
		if (dbUpKey()==1)
		{
			//Move tiles??
				
		}
				
	}
	


	


	if(dbEscapeKey() == 1)
		{
			break;
		}
		dbSync();

}

	for (int i = 1; i < 10; i ++)
	{
	dbDeleteImage (i);
	dbDeleteSprite(i);
	}

	return;

}

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Mireben

16

Years of Service

User Offline

Joined: 5th Aug 2008

Location:

Posted: 15th Aug 2011 20:48

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It's only a question of calculating the correct coordinates for dbPasteSprite. Introduce xOffset and yOffset variables that show the current position of the top left corner of the visible screen. The offsets change when you press a direction key. Then paste the sprites by adding the offset to the coordinates.

Here is a simple test program to show you what I mean. I used just "X" characters instead of sprites, but the point is the coordinate calculation. This program does not limit the offset, but in a game you will need to do that, to keep player movement within certain limits.

+ Code Snippet

#include "DarkGDK.h"

void DarkGDK(void)
{
	dbSyncOn();
	dbSyncRate(60);

	int xOffset = 0;
	int yOffset = 0;

	while (LoopGDK())
	{
		dbCLS();

		if (dbUpKey()) ++yOffset;
		if (dbDownKey()) --yOffset;
		if (dbRightKey()) --xOffset;
		if (dbLeftKey()) ++xOffset;

		for (int y = 0; y < 10; ++y) {
			for(int x = 0; x < 32; ++x) {
				dbText(xOffset + x * 21, yOffset + y * 27, "x");
			}
		}

		dbSync();
	}
}

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Dark GDK / scolling 2D tiles as a whole?