collision

Hello. I have a multiple collision problem. There is a bullet, which hits the enemy(red rectangle). Then, it ++ the score. There is a spiral (red circle) which is supossed to trigger the scene to end when the enemy (red rectangle) touches it. In this situation, when enemy hits the spiral, it works, the scene ends, and we go to the menu screen. But, when bullet hits the enemy, the same thing happens, and I don't know why. Now, here's my code: struct PhysicsCategory { static let None : UInt32 = 0 static let All : UInt32 = UInt32.max static let enemyOne : UInt32 = 0b1 static let enemyTwo : UInt32

Is there a way in pygame to look for a collision between the a particular side of a sprite and a particular side of another sprite in pygame? For example, if the top of sprite A collides with the bottom of Sprite B, return True. I am certain there is a way to do this, but I can't find any particular method in the documentation. Thanks! 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

I've been working on adding a Quadtree to a program that I'm writing, and I can't help but notice that there are few well explained/performing tutorials for the implementation that I'm looking for. Specifically, a list of the methods and pseudocode for how to implement them (or just a description of their processes) that are commonly used in a Quadtree (retrieve, insert, remove, etc.) is what I'm looking for, along with maybe some tips to improve performance. This is for collision detection, so it'd be best to be explained with 2d rectangles in mind, as they are the objects that will be stored

This relates to this question . I am using this answer to generate UUID in JavaScript: 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) { var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8); return v.toString(16); }); This solution appeared to be working fine, however i am getting collisions. Here's what i have: A web-app running in Google Chrome. 16 users. about 4000 UUIDs have been generated in the past 2 months by these users. i got about 20 collisions - e.g. new UUID genereated today was the same as about 2 months ago (different user). So the questions are: What's

We're using the Draggable JQuery UI plugin and need to disallow overlapping among our elements. We could write some collision detection ourselves but would prefer to use a tested package. Any suggestions? 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

Consider the following jfiddle http://jsfiddle.net/bchapman26/9uUBU/29/ //angular.js example for factory vs service var app = angular.module('myApp', ['module1', 'module2']); var service1module = angular.module('module1', []); service1module.factory('myService', function() { return { sayHello: function(text) { return "Service1 says \"Hello " + text + "\""; }, sayGoodbye: function(text) { return "Service1 says \"Goodbye " + text + "\""; } }; }); var service2module = angular.module('module2', []); service2module.factory('myService', function() { return { sayHello: function(text) { return