A fast, easy to use, free, and community supported 2D game engine
Hello. Im making a simple game, and need help
I create my level with tiled. The level has 2 layers.
1 is a background and is named "Background Layer".
The other one is a path to the other side of the screen.
The idea of the game is easy. Just make a ball (the ball is a sprite) travel the path to the other side
Now the question. I want to know how to make that when the ball touch the background, it shows a label.
Someone can help me? Thanks in advance
try looking at this video
| Get the Video Player |
then look at using inkscape with tiled. I've not tried it myself, but i think this is what you are after?
Questor
Member
jpv123,
Take a look at the 4th post in this thread:
http://www.cocos2d-iphone.org/forum/topic/3099
It basically runs through a tilemap and looks at what type of tile is in each position. Based upon the index of the for-loop you can determine where a tile is in your background tilemap and then use the coordinated to see if it intersects with the postion of your sprite.
However, you may want to consider using either Box2d or Chipmunk (physics engines) if you would like to have significant flexibility in your collision detection.
HTH,
Q
PS(There are testbed examples for both Box2d and Chipmunk in the Cocos2d test directory...additional info and documentation can also be found in there respective home pages (just google either one)).
Okay, so let me see if i understand
Here is the code that you post on that thread:
// Read your TMX tilemap
CCTMXTiledMap tilemap = [CCTMXTiledMap tiledMapWithTMXFile:@"SomeTileMap.tmx"];
//anchor it
tilemap.anchorPoint = ccp(0, 0);
// get the layer you are interested in
CCTMXLayer *layer = [tilemap layerNamed:@"Layer 0"];
for (int row=0; row<layerSize.width; row++) {
for (int col=0; col<layerSize.height; col++) {
int tileId=[layer tileGIDAt:ccp(row,col)];
// [… then process tiles in tilemap at each position …]
}
}
So,do i have to put what i want to happen after
int tileId=[layer tileGIDAt:ccp(row,col)];
?
Thanks and sorry for my inexperience
Questor
Member
jpv123
All the for-loops are doing is telling you which tile is in which position in the TMXTilemap. Knowing where the background tiles are allows you to compare the location of the background tiles with the location of the sprite (obviously, you would multiply the row and col of the tile by the dimensions of the each tile in your tilemap).
For example, if your tiles are 32x32 pixels and you have a non-zero background tile at col=15, row=10, then that means there is a tile sprite at X=15x32=480, Y=10x32=320. So knowing that you would compare the location of your sprite and the location of tile you would create two CGRects (one for the sprite and one for the tile) and make the call:
if (CGRectIntersectsRect(sprite_rect, background_tile_rect)
{
[....sprite touched background tile ---- print label at X, Y...]
}I use box2d for my collision detection, so this is only a very rough idea of how you would do it strictly with Cocos2d. There may very well be a better approach and if so, hopefully someone more knowledgeable will chime in.
I recommend (if you haven't already done so) that you run the Cocos2d Testbed examples (located in the Cocos2d Test directory) and try them all out. When you find an example that generally does something you want your program to do, look into the code and experiment with different values until you understand what the code is doing. There are tons of different example to look at and it really is terrific way to get familiar with Cocos2d. Additionally the examples are the best place to look at first when you have a question about something. If you don't understand the example, then ask question about it and it is alot easier for people to answer since we all have access to the same example code. Also, the Box2d and chipmunk physics engines' testbeds are also located in the Test directory under cocos2d.
Regards,
Q
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