collision

I need to make an algorithm that detects when two spheres collide, and, the direction that wich one will take an instant after the collision. Let say, Imagine like when you open your table in a pool match, all the balls are colliding one to another "randomly". So, before starting to write the code myself, I was thinking if there is already a implementation of this out there. Thx in advance! Cyas.- You can find a good tutorial here: Link The collision part is easy. Check if the distance between the spheres centers is less than the sum of their radius. As for the bounce, you need to swap the

First of all please don't be too critical with my English. I'm not a native speaker. I hope I can explain myself never the less! Further more, I read that I should show I made some efforts to solve the given problem myself. To show this my post became relatively long. What I want to do: I am new (three weeks) to javascript and I try to build a pool billiard table via html5 canvas and javascript. In the end a user should be able to present a certain playing situation on the virtual pool tabe by dragging the sixteen balls around. I found a lot of hints here on stackoverflow concerning paths and

does anyone know whether bodies only collide when (body1.categoryBits & body2.maskBits) && (body1.maskBits & body2.categoryBits) ? or do they already collide when (body1.categoryBits & body2.maskBits) || (body1.maskBits & body2.categoryBits) ? If anyone is still looking for more explanations, I made a detailed tutorial here : http://aurelienribon.wordpress.com/2011/07/01/box2d-tutorial-collision-filtering/ From the Box2D manual : 6.2.3. Filtering Collision filtering is a system for preventing collision between shapes. For example, say you make a character that rides a bicycle. You want the

I am pretty new to both CANVAS and Kineticjs but I feel what I am attemping should be much easier then I am making it out to be. Basically this is what I have so far: The code I am attempting to use is from kineticjs Stop drag to a shape when overlaps with another solution but was unable to get it to work. Please check the live jsfiddle code var isRectCollide = function(target, box) { if (target.x - target.width >= box.x + box.width && target.y - target.height >= box.y + box.height && target.x + target.width <= box.x + box.width && target.x + target.height <= box.y - box.height ) return false;

Anyone have a simple algorithm for this? No need for rotation or anything. Just finding if a line segment made from two points intersects a square Eric This code should do the trick. It checks where the line intersects the sides, then checks if that is within the width of the square. The number of intesections is returned. float CalcY(float xval, float x0, float y0, float x1, float y1) { if(x1 == x0) return NaN; return y0 + (xval - x0)*(y1 - y0)/(x1 - x0); } float CalcX(float yval, float x0, float y0, float x1, float y1) { if(x1 == x0) return NaN; return x0 + (yval - y0)*(y1 - y0)/(x1 - x0); }