COCOS2D: how to get points in a grid upon touch

[Chris1979]

Hey guys!

I've some issues with detecting the X and Y coordinates in the grid upon touch

the grid is 6x7 and there are 41 bricks upon the grid

what am I forgetting?

bricks.m

- (void)ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *) event{
	
	CCLOG(@"ccTouchEnded");
	NSAssert(state == kStateGrabbed, @"Unexpected state!"); 

	CGPoint location = [touch locationInView: [touch view]]; 
	location = [[CCDirector sharedDirector] convertToGL: location];

	CCLOG(@"location.x %f", location.x);
	CCLOG(@"location.y %f", location.y);
	
	[theGame moveBrick:self Xpos: location.x Ypos: location.y];

	state = kStateUngrabbed;
}
@end

gameplaylayer.m

//-(void)moveBrick:(Bricks *)brick dir:(int)dir{
-(void)moveBrick:(Bricks *)brick Xpos: (float)xpos Ypos: (float) ypos{
	
	CCLOG(@"moveBrick");
	CCLOG(@"xpos %f", xpos);
	CCLOG(@"ypos %f", ypos);
	
	float CoordX = xpos+blankPosition.x*80;
	float CoordY = ypos+blankPosition.y*46;
	
	CCLOG(@"CoordX %f", CoordX);
	CCLOG(@"CoordY %f", CoordY);
	
	for(int i =0; i< GRID_WIDTH ; i++)
	{
		for(int j =0; j< GRID_HEIGHT ; j++)
		{
			if(grid[i][j] == brick)
			{

				
				switch ([self validMove:CoordX Yposition:CoordY]) {
					case 1:
						if(i<GRID_WIDTH-1)
						{
							CCLOG(@"rightBrick");
							grid[i][j] = grid[i+1][j];
							grid[i+1][j] = brick;
							[grid[i][j].mySprite setPosition:ccp(100*i + GRID_OFFSET.x,100*j + GRID_OFFSET.y)];
							[grid[i+1][j].mySprite setPosition:ccp(100*(i+1) + GRID_OFFSET.x,100*j + GRID_OFFSET.y)];
							//[self checkGroups:YES];
							return;
						}
						break;
					case 2:
						if(i>0)
						{
							CCLOG(@"leftBrick");
							grid[i][j] = grid[i-1][j];
							grid[i-1][j] = brick;
							[grid[i][j].mySprite setPosition:ccp(100*i + GRID_OFFSET.x,100*j + GRID_OFFSET.y)];
							[grid[i-1][j].mySprite setPosition:ccp(100*(i-1) + GRID_OFFSET.x,100*j + GRID_OFFSET.y)];
							//[self checkGroups:YES];
							return;
						}
						break;
					case 3:
						if(j<GRID_HEIGHT-1)
						{
							CCLOG(@"downBrick");
							grid[i][j] = grid[i][j+1];
							grid[i][j+1] = brick;
							[grid[i][j].mySprite setPosition:ccp(100*i + GRID_OFFSET.x,100*j + GRID_OFFSET.y)];
							[grid[i][j+1].mySprite setPosition:ccp(100*i + GRID_OFFSET.x,100*(j+1) + GRID_OFFSET.y)];
							//[self checkGroups:YES];
							return;
						}
						break;
					case 4:
						if(j>0)
						{
							CCLOG(@"upBrick");
							grid[i][j] = grid[i][j-1];
							grid[i][j-1] = brick;
							[grid[i][j].mySprite setPosition:ccp(100*i + GRID_OFFSET.x,100*j + GRID_OFFSET.y)];
							[grid[i][j-1].mySprite setPosition:ccp(100*i + GRID_OFFSET.x,100*(j-1) + GRID_OFFSET.y)];
							//[self checkGroups:YES];
							return;
						}
						break;
				}
			}
		}
	}
	
}


-(void)placeBricks{
	CCLOG(@"placeBricks");
	
	
	//empty spot in the bottom right corner of the grid
	blankPosition = CGPointMake(5, 0);
	
	for(int i =0; i< GRID_WIDTH ; i++)
	{
		for(int j =0; j< GRID_HEIGHT ; j++)
		{
			
			CGPoint orgPosition = CGPointMake(i,j);
			
			if( blankPosition.x == orgPosition.x && blankPosition.y == orgPosition.y ){
				continue; 
			}
			
			Bricks * leftB = nil;
			Bricks *leftmostB= nil;
			Bricks * topB= nil;
			Bricks *topmostB= nil;
			int prohibitedLeft = -1, prohibitedTop = -1;
			if(i>=2)
			{
				leftB = (Bricks *)grid[i-1][j];
				leftmostB = (Bricks *)grid[i-2][j];
			}
			if(j>=2)
			{
				topB = (Bricks *)grid[i][j-1];
				topmostB = (Bricks *)grid[i][j-2];
			}
			if(leftB && leftmostB && leftB.bricksType == leftmostB.bricksType)
			{
				prohibitedLeft = leftB.bricksType;
			}
			if(topB && topmostB && topB.bricksType == topmostB.bricksType)
			{
				prohibitedTop = topB.bricksType;
			}
			[grid[i][j] placeInGrid:ccp(100*i + GRID_OFFSET.x,101*j + GRID_OFFSET.y) pt:prohibitedTop pl:prohibitedLeft];
		}
	}
}

//Valid moves: UP, DOWN, LEFT or RIGHT
-(Move) validMove:(float) brickX Yposition: (float) brickY{
	CCLOG(@"validMove");
	CCLOG(@"brickX %f", brickX);
	CCLOG(@"brickY %f", brickY);
	CCLOG(@"blankPosition.x %f", blankPosition.x);
	CCLOG(@"blankPosition.y %f", blankPosition.y);
	// blank spot above current brick 
	if( brickX == blankPosition.x && brickY == blankPosition.y+1 ){
		return UP; 
		CCLOG(@"Up");
	}
	
	// bank splot below current brick
	if( brickX == blankPosition.x && brickY == blankPosition.y-1 ){
		return DOWN; 
		CCLOG(@"Down");
	}
	
	// bank spot left of the current brick
	if( brickX == blankPosition.x+1 && brickY == blankPosition.y ){
		return LEFT;
		CCLOG(@"Left");
	}
	
	// bank spot right of the current brick
	if( brickX == blankPosition.x-1 && brickY == blankPosition.y ){
		return RIGHT; 
		CCLOG(@"Right");
	}
	
	return NONE;
}

[dapis]

You'd do well to ask this in a Cocos2d forum, rather than this one.

[Chris1979]

Originally Posted by dapis

You'd do well to ask this in a Cocos2d forum, rather than this one.

Already did... got no answer

[KennyChong]

Why not make the 41 bricks are touchable objects that response to touch event? Will this work for you?