game-physics

I am developing a small app in html5 canvas. I need to move a object in circular motion using keyboard keys . I am able to move the object using keyboard keys but there are bugs .The object do not move back ward or forward from the same position .Can any body help me completing this. Please check the code from following. Any kind of help will be highly appreciable http://jsfiddle.net/tmrhq6s5/ if ( !window.requestAnimationFrame ) { window.requestAnimationFrame = ( function() { return window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame ||

I am trying to write a simple physics simulation where balls with varying radii and masses bounce around in a perfectly elastic and frictionless environment. I wrote my own code following this resource: http://www.vobarian.com/collisions/2dcollisions2.pdf and I also tested the code from here: Ball to Ball Collision - Detection and Handling QUESTION EDITED With the help of Rick Goldstein and Ralph, I have gotten my code to work (there was a typo..). Thanks so much for you help. However I am still confused as to why the other algorithm isn't working for me. The balls bounce off in the correct

in my Opengl programs (before i apply perspective projection matrix) whenever i draw some object I draw it at the origin of the world coordinate system, however almost all of the Opengl tutorials states that the camera (My projection view) is located at the origin looking toward positive z-axis (which depends on how you treat z value in the projection matrix later on), however if that is true how does my camera (located in the origin) is able to view an object located in the origin. Note: i need this information so that i shift the world and rotate it around the origin so i get a rotating

I'm trying to inherit from Transformable and Drawable in SFML in order to make my objects... well, transformable and drawable. I'm making a simple breakout game, but perhaps I'm going about this the wrong way. Here's my code: #include <SFML/Graphics.hpp> #include <SFML/System.hpp> class Player : public sf::Transformable, public sf::Drawable { public: Player(int x, int y); ~Player() {}; sf::RectangleShape p_rect; void doMovement(const sf::RenderWindow& window); sf::FloatRect getGlobalBounds() const; private: virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const { states

I have created simple, frame independent, variable time step, linear movement in Direct3D9 using ID3DXSprite . Most users cant notice it, but on some (including mine) computers it happens often and sometimes it stutters a lot. Stuttering occurs with VSync enabled and disabled. I figured out that same happens in OpenGL renderer. Its not floating point problem. Seems like problem only exist in AERO Transparent Glass windowed mode (fine or at least much less noticeable in fullscreen, borderless full screen window or with aero disabled), even worse when window lost focus. EDIT: Frame delta time

I’m using Cocos2d v3 and want to change a body from dynamic to static after colliding with another body. At the moment I’ve got: -(void)ccPhysicsCollisionPostSolve:(CCPhysicsCollisionPair *)pair static:(CCNode *)nodeA wildcard:(CCNode *)nodeB { _player.physicsBody.type = CCPhysicsBodyTypeStatic; } or -(BOOL)ccPhysicsCollisionPreSolve:(CCPhysicsCollisionPair *)pair static:(CCNode *)nodeA wildcard:(CCNode *)nodeB { _player.physicsBody.type = CCPhysicsBodyTypeStatic; return YES; } but neither works. I get the error: Aborting due to Chipmunk error: This operation cannot be done safely during a

I’m building an online multiplayer billiards game and I’m struggling to think of the best approach to multiplayer physics simulation. I have thought of a three possible scenarios, each having its own advantages and disadvantages and I would like to hear some opinion of those that either have implemented something similar already or have experience in multiplayer online games. 1st Scenario: Physics simulation on the clients: The player in turn to take a shot sends the angle of the shot and power to the server, and the sever updates all clients with these values so they can simulate the shot

So I built some time ago a little Breakout clone , and I wanted to upgrade it a little bit, mostly for the collisions. When I first made it I had a basic " collision " detection between my ball and my brick, which in fact considered the ball as another rectangle. But this created an issue with the edge collisions, so I thought I would change it. The thing is, I found some answers to my problem: for example this image and the last comment of this thread : circle/rect collision reaction but i could not find how to compute the final velocity vector. So far I have : - Found the closest point on