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#ActualBeerNutts

Posted 17 October 2012 - 12:38 PM

My initial thought is the rocks (or the moving platforms, I assume) should have a set path they follow, so it doesn't worry about colliding with anything. In theory, you should only be checking the controlled objects for collision: The player, the enemies, and the bullets.

So, the player should be checking if he hits any "physical" object (ie, the ground, platforms, wall, etc.), an enemy bullet, a power upgrade, or an enemy.

The enemy should only be checking if he hits the players bullet, or a physical object. He doesn't have to check if he hits the player since the player will handle that check.

The bullet should only be checking for hitting a physical object (wall), since this will destroy it.

So, I would suggest doing this method "brute force" to begin with (have the player check EVERY object) as you probably won't see an issue with your first game.

Later, if you want, you can start to add some smarts by adding a spatial hash (look it up) to your game, and only check other objects within each grid space.

While I think it's a good idea to get a grasp on how objects move and collide within a 2d world, you should really look at 2d physics libraries. They make movement and collision in your 2d world a breeze. My personal favorite is chipmunk-physics, but others like box2d as well.

Good luck, and have fun!

#1BeerNutts

Posted 17 October 2012 - 12:35 PM

My initial thought is the rocks (or the moving platforms, I assume) should have a set path they follow, so it doesn't worry about colliding with anything. In theory, you should only be checking the controlled objects for collision: The player, the enemies, and the bullets.

So, the player should be checking if he hits any "physical" object (ie, the ground, platforms, wall, etc.), an enemy bullet, a power upgrade, or an enemy.

The enemy should only be checking if he hits the players bullet, or a physical object. He doesn't have to check if he hits the player since the player will handle that check.

The bullet should only be checking for hitting a physical object (wall), since this will destroy it.

So, I would suggest doing this method "brute force" to begin with (have the player check EVERY object) as you probably won't see an issue with your first game.

Later, if you want, you can start to add some smarts by adding a spatial hash (look it up) to your game, and only check other objects within each grid space.

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