cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   EiTkoCaT
   Member

   Hey,
   I've spent my last two months learning obj-c and cocos2d. And now I started Box2d, but I can't understand it. I also tried use tile map editor, and Inkspace, but I can't find a way to insert the map into the cocos2d and also recognize items like: Enemy, star (for game), etc. I've downloaded LevelSVG preview, but I don't have enough money to spend right now on buy the full 250$ LevelSVG, and I haven't figured out what exactly there is there.

   I wanna build a simple game contains 2 persons - sprites, and one ball, something like this game:
   http://footyflash.com/online-soccer-game/164/1-on-1-Soccer
   It's pretty simple game, but I've noticed that I have to use an engine like box2d to get the ball jumping and all.

   I'm a pro in PHP, HTML, CSS, I know quite C#, not much. I learned obj-c and I can easily build any app now.

   So, any tips?

   Posted 1 year ago #
2. 

   araker
   Moderator

   You should look at some tutorials. How to make a tile based game part 2 explains how you can add custom properties to tilemaps.

   Posted 1 year ago #
3. 

   slipster216
   Moderator

   You might want to just write your own physics for something this simple. A lot of people jump to something like Box2d, not realizing that what you gain in features is taken away from your ability to tweak the feel. Looking at that game, I highly doubt it's using real physics. Instead, they're likely doing something like this:

   The ball has a velocity property
   On the poll
   - See if the ball is below the ground plane
   - If so, velocity.y * -1, ball.y = groundplane.y
   - See if the ball is past a goal
   - If so, win..
   - See if the ball is colliding with a player
   - If so, compute angle (ball vs. player) and apply velocity in that direction
   - Reduce velocity for gravity or friction
   - Move ball

   It's pretty quick to get something like this working even for a novice coder. The cocos library contains math functions for all of this as well. You'll have to spend some time working out the more fiddly bits (penetration issues, offsets, etc), but it'll be a great learning experience and make it much easier to understand a real physics system. More so, with faked physics, you can cheat easier to make the game play the way you want it.

   Posted 1 year ago #
4. 

   EiTkoCaT
   Member

   slipster216, thank you very much, you are right.
   In the game must be a some physics, but not that I can't build. I also realized that in other game I wanna build I don't need any physics, almost at all!

   I have now sprite moving with two buttons, left and right, and I have a ball. But I can't understand how I make the ball move if the player is touching him (The sprite player).

   Araker, thanks too - the maps are for the other game I wanna build, I'll read the tutorials!

   Posted 1 year ago #

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