collision

I'm trying to inspect collision collision of two bodies, but collision detection callbacks are not being fired. Here is my code: 1) My CCScene implements CCPhysicsCollisionDelegate protocol 2) I set collision delegate for physics _physics = [CCPhysicsNode node]; _physics.gravity = PHYSICS_GRAVITY; _physics.debugDraw = YES; _physics.collisionDelegate = self; [self addChild:_physics]; 3) For each of two body I set a collision type body1.collisionType = @"body1"; body2.collisionType = @"body2"; 4) That's it, when these two bodies collide none of CCPhysicsCollisionDelegate callback methods is

I'm making a sidescrolling game in Pygame, and if the fox sprite collides with the tree, it is supposed to print "COLLIDE". But it doesn't work. How can I fix this to detect collision between the fox and the tree? Here's the code: if foxsprite1 > xtree and foxsprite1 < xtree + treewidth or foxsprite1 + treewidth > xtree and foxsprite1 + treewidth < xtree + treewidth: print ("COLLIDE") xtree is the x coordinate of the tree, treewidth is the width of the tree, and foxsprite1 is the fox. Keep object position and size as pygame.Rect() fox_rect = pygame.Rect(fox_x, fox_y, fox_width, fox_height)

My implementation of the following can be found on jsfiddle.net I have four divs. My goal is to make them draggable around the page but NOT to allow them to overlap one another. Each can be dragged around the page with a mousemove listener. container.addEventListener('mousemove',mouseMove); function mouseMove(e) { if (!mouseDown) {return;} let coords=e.target.getBoundingClientRect(); let movX=e.movementX; let movY=e.movementY; if (!collision(movX,movY,e.target.classList[1],coords)){ e.target.style.left=`${coords.left+movX}px`; e.target.style.top=`${coords.top+movY}px`; } } My collision

I am trying to make a replica of Asteroids in Unity. The problem is that my bullets are not triggering the OnTriggerEnter2D method on the asteroids. The asteroids have the following script attached: using UnityEngine; using System.Collections; public class Asteroid : MonoBehaviour { void Start () { print ("class initiated"); } void onTriggerEnter2D (Collider2D collider) { Debug.Log (collider); } } The bullet GameObject has Is Kinematic and Is Trigger enabled, and has Rigidbody 2D and Box Collider 2D attached. The asteroid GameObject has Rigidbody 2D and Circle Collider 2D, and Is Kinematic and

I'm writing a 3D maze program in C# and I need to have UI Text display "You Win!" When the player reaches the end of the maze. I have a trigger set up in Unity as a cube, named FinishLine, and I have the UI text named winText I'm getting an error on this line.. GUI.Box(New rect (10,10,100,90), winText); the error is "The best overloaded method matfch for unityengine.gui.box (unityEngine rect, string)' has some invalid arguments I also have no idea what those numbers are (10,10,100,90), so maybe that's messing something up? What are those values indicating...? Here is my code.. public class

I'm currently in the middle of writing a game like Breakout, and I was wondering how I could properly bounce a ball off a surface. I went with the naive way of rotating the velocity by 90 degrees, which was: [vx, vy] -> [-vy, vx] Which (unsurprisingly) didn't work so well. If I know the position and veocity of the ball, as well as the point the ball would hit (but is going to instead bounce off of) how can I bounce it off that point? Constraints: I'm using integer math (No FP anywhere) All my surfaces are simple flat surfaces (Vertical, horizontal, or a block) I only want to bounce off in a 90