There is no function to get sides collision in PyGame. But you could try to use pygame.Rect.collidepoint to test if A.rect.midleft, A.rect.midright, A.rect.midtop, A.rect.midbottom, A.rect.topleft, A.rect.bottomleft , A.rect.topright, A.rect.bottomright are inside B.rect (pygame.Rect). EDIT: Example code. Use arrows to move player and touch enemy. (probably it is not optimal solution) import pygame WHITE = (255,255,255) … Read more
Several problems here. You’re defining categories in a way that keeps them from being easily tested. You’re testing categories in a way that doesn’t get you the unique answers you want. You’ve confused your code by trying to track up to four bodies in one contact. Any contact will always have exactly two bodies. Let’s … Read more
My best guess is that Math.random() is broken on your system for some reason (bizarre as that sounds). This is the first report I’ve seen of anyone getting collisions. node-uuid has a test harness that you can use to test the distribution of hex digits in that code. If that looks okay then it’s not … Read more
Why don’t you use a long variant of the default String.hashCode() (where some really smart guys certainly put effort into making it efficient – not mentioning the thousands of developer eyes that already looked at this code)? // adapted from String.hashCode() public static long hash(String string) { long h = 1125899906842597L; // prime int len … Read more
Efficient Quadtrees All right, I’ll take a shot at this. First a teaser to show the results of what I’ll propose involving 20,000 agents (just something I whipped up real quick for this specific question): The GIF has extremely reduced frame rate and significantly lower res to fit the 2 MB maximum for this site. … Read more
You can try jquery-collision plus jquery-ui-draggable-collision. Full disclosure: I just wrote and released these on sourceforge. The first allows this: var hit_list = $(“#collider”).collision(“.obstacle”); which is the list of all “.obstacle” that overlap “#collider”. The second allows: $(“#collider”).draggable( { obstacle: “.obstacle” } ); Which gives you (among other things), a “collision” event to bind to: … Read more
As of today, AngularJS modules do not provide any sort of namespacing that would prevent collisions between objects in different modules. The reason is that an AngularJS app has a single injector that holds names for all objects without respect to module names. The AngularJS Developer Guide says: To manage the responsibility of dependency creation, … Read more
Your quadtree structure isn’t optimal. You’re right to store 4 subtrees per node, but actual objects should only be stored inside the leaves, not inner nodes. Therefore the collection holding the actual objects needs to be moved to the leaves. Let’s have a look at the implementation of the operations: Insert an object into the … Read more
Thank you to user sloth! The question he linked gave me some much needed clarity. It took me a bit but I implemented it. I created a function for the collision. def wallColl(self, xvel, yvel, colliders): for collider in colliders: if pygame.sprite.collide_rect(self, collider): if xvel > 0: self.rect.right = collider.rect.left self.xvel = 0 if xvel … Read more
The categoryBitMask sets the category that the sprite belongs to, whereas the collisionBitMask sets the category with which the sprite can collide with and not pass-through them. For collision detection, you need to set the contactTestBitMask. Here, you set the categories of sprites with which you want the contact delegates to be called upon contact. … Read more