Relating to the motion of objects through space and time. Including concepts such as acceleration (thrust and gravity), mass, collision response, friction and more.
3
votes
1answer
482 views
Havok physics with a wide range of object scales
So typically Havok works best with normal human sized objects with a gravity of 9.8m/s^2 and dealing with everything in meters.
In my Game though there will be a large variety of scales from ...
3
votes
2answers
383 views
Silverlight scrolling with camera
I'm trying to get my head around scrolling a 2D map that uses a physics engine. If I was to launch a projectile, would I actually be applying the physics to the background images rather than the ...
3
votes
1answer
581 views
How to create complex Physics scenes with the Havok Content Tools
For example, Havok Content Tools allows you to define physic bodies, properties, connections, etc in Maya, 3d Studio Max, etc.
For creating full scenes/levels is this really the correct approach or ...
3
votes
1answer
685 views
Fundamental physics component(s) in component-based game engine
What are the "smallest" physics components in your component-based game engine?
Would it make sense to create something like Positionable, Rotatable, Movable, Collidable and combine them the way you ...
3
votes
0answers
49 views
Is it possible to get the colliding sides using the separating axis theorem?
The title says it all, is it even possible to get the colliding sides?
I'm checking for collisions between two OABBs, which works fine using SAT. Now I want to set the moving object's velocity to the ...
3
votes
3answers
536 views
How to move a sprite automatically using a physicsHandler in Andengine?
I use a DigitalOnScreenControl (knob with a four-directional arrow control) to move the entity and the entity which is bound to a physicsHandler.
physicsHandler.setEntity(sprite);
...
3
votes
2answers
2k views
Collision detection in 3D space
I've got to write, what can be summed up as, a compelte 3D game from scratch this semester. Up untill now i have only programmed 2D games in my spare time, the transition doesn't seem tough, the ...
3
votes
0answers
298 views
How can I make bodies that do not stick to the wall in Bullet Physics? [duplicate]
Possible Duplicate:
Physics engine recommendation which can simulate pool game correctly?
I made a Billiards scene with Bullet Physics, but I've got a problem. When the ball is slowing down ...
3
votes
1answer
493 views
How to restrict paddle movement using Farseer Physics engine 3.2
I am new to using Farseer Physics Engine 3.2(FPE), so please bear with my questions. Also, since FPE 3.2 is based on Box2D, I have been reading Box2D manual and pieces of code scattered in samples to ...
3
votes
4answers
178 views
What environment should I use if I just want to test different math things?
For example, I've asked about the breakout formula to calculate the ball bounce. Inside of XNA, I don't know where I would code this and to even display something I would need a lot of code.
Is there ...
2
votes
3answers
761 views
simplest way of making a sphere roll in a realistic way
rather than just moving a sphere across a plane, I want to make it roll like a ball. What is the simplest way of doing this? I assume it will have something to do with the circumference of the ball ...
2
votes
4answers
532 views
How to Make Objects Fall Faster in a Physics Simulation
I used the collision physics (i.e. Box2d, Physics Body Editor) and implemented onto the java code. I'm trying to make the fall speed higher according to the examples:
It falls slower if light object ...
2
votes
4answers
398 views
Math and physics, where to start?
the only math I know how is to add the velocity to position. Thats it. i would like to know how to do more stuff, physics, collision detection with stuff other than perfect circles, etc.
But where ...
2
votes
2answers
264 views
How to account for speed of the vehicle when shooting shells from it?
I'm developing a simple 3D ship game using libgdx and bullet.
When a user taps the mouse I create a new shell object and send it in the direction of the mouse click. However, if the user has tapped ...
2
votes
1answer
406 views
Friction in 2D game
I'm developing a 2D platformer, although this question could probably apply to just about any 2D type physics; What is the equation for friction? I have sort of a hacky type of friction set up in my ...
2
votes
2answers
960 views
How do I convert matrices intended for OpenGL to be compatible for DirectX?
I have finished working through the book "Game Physics Engine Development 2nd Ed" by Millington, and have got it working, but I want to adapt it to work with DirectX.
I understand that D3D9+ has the ...
2
votes
2answers
245 views
Automatic weapon recoil with that “Counter Strike”-feel
How would you do it?
I already found this function for an impulse (helped by math.SE). It works for single shots, but not for automatic weapons.
Any ideas?
2
votes
2answers
173 views
Collisions between players at spawnpoints
I am working on a FPS/MMORPG and ran into a problem at spawnpoints, when I enabled collision detection between players. Neither player would be able to move if both spawned at the same time, because ...
2
votes
2answers
2k views
How to implement “Flick” gesture for throwing an object in the 2D realm
I am trying to implement a FLICK gesture for throwing a ball from point A to point B on the iPhone. This is my current plan....
Using touchesBegan and touchesEnd I can find the direction I need to ...
2
votes
1answer
639 views
Platformer Starter Kit - Collision Issues
I'm having trouble with my game that is based off the XNA Platformer starter kit.
My game uses smaller tiles (16x16) then the original (32x40) which I'm thinking may be having an effect on collision ...
2
votes
2answers
331 views
Is there a standard way to store 3D meshes to easily communicate between libraries?
In a 3D game lots of different systems need to know about geometry data, however the only way they seem to be able to agree to on in representing it by an array of triangles.
Can anyone recommend a ...
2
votes
5answers
3k views
Box2D physics editor for complex bodies [closed]
Is there any editor out there that would allow me to define complex entities, with joins connecting their multiple bodies, instead of regular single body entities? For example, an editor that would ...
2
votes
3answers
913 views
XNA: Deforming/Destroying a model
I want to be able to destroy and deform a car in-game.
For example, I want two cars to crash and a) break the meshes apart (probably applying force to fly them apart) and b) deform the mesh (like ...
2
votes
2answers
96 views
Creating shattering effects without having to use actual physics?
For certain effects like glass shattering and falling objects cracking to reveal their inner contents, are there any tricks or ways to implement these fracture physics without having to use actual ...
2
votes
1answer
153 views
Physics engine for Billiard game [closed]
I need to write a simple 3D billiard game using OpenGL. Which physics engine is simple and best to use in this case? Or it's better to write physics by myself?
2
votes
2answers
210 views
Procedural generation of physics-enabled structures (in a 2D world)
Is it possible to procedurally generate stable structures out of rigidbody objects at a reasonable runtime speed? Imagine Angry Birds's levels kind of structures but generated procedurally.
2
votes
1answer
249 views
Making AI jump on a spot effectively
How to calculate, in 3D environment, the closest point, from which an AI character can jump onto a platform?
Setup
I have an initial velocity V(Vx,Vy,VZ) and a spot where the character stands still ...
2
votes
4answers
785 views
Should I used Box2D for a Flash platformer or use something for gaming like Fixel or Flashpunk?
I'm trying to make a platformer with Flash/AS3 and have been looking for something to help with some of the collision etc. I've look at a few engines and Box2D/WCK seems the most sophisticated. Do I ...
2
votes
3answers
633 views
How will the velocities of two moving objects change once they collide?
I'm making a small game where things can fly around and collide. Things like boxes and so on. For each object, I have an array of all forces acting upon it, I have it's mass, it's position and it's ...
2
votes
1answer
1k views
how to ignore physics collision of some objects in box2d
I know this sounds silly but I would like some objects to follow physics while others not to collide each other.
I tried to achieve them by setting their position exclusively. But then it will ...
2
votes
5answers
688 views
Simulating water droplets on a window
How do I simulate water droplets realistically falling, gathering, and flowing down a window? For example, see http://www.youtube.com/watch?v=4jaGyv0KRPw. In particular, I want to simulate how smaller ...
2
votes
2answers
465 views
Can I change shape of a rigid body after it created in Bullet3D?
I'm beginning Bullet3D. Can I change collision shape of a rigid body after it created? A rigid body accepts a collision shape when it's creating, but it's hard to find options changes the collision ...
2
votes
3answers
207 views
How should I calculate the new angle/direction of my ball hitting a wall? [duplicate]
I'm building a Pong game and I am stuck at how the ball should bounce when hitting a horizontal wall.
I tried a few methods but none seems to work.
So far I have an update method, which is called ...
2
votes
2answers
377 views
android 2d bullet-spawn (shooting)
This will be a quick question since Im pretty sure I'm overlooking something small that I for some reason cant see.
My sprite is moved using a joystick, and I want my sprite to be able to shoot. I've ...
2
votes
2answers
540 views
How to achieve smooth gameplay in a physics based multiplayer game? (2d)
I'm using cocos2d 2.0 and Gamekit for networking. I've got a server/client model. It works over wifi (local) and bluetooth. (Xcode 4.3, Objective C)
Basically, there's a ball and 2 or more players. ...
2
votes
1answer
506 views
Effects of collisons: broken glass, damaged cars, how are they created?
My question is related in particular to achieving the effects of collision in game engine, how is this done?
I have searched a bit, read from the internet and went through a few tutorials, and saw ...
2
votes
2answers
437 views
Physics in carrom like game using cocos2d + Box2D
I am working on carrom like game using cocos2d + Box2D. I set world gravity(0,0), want gravity in z-axis. I set following values for coin and striker body:
Coin body (circle with radius - ...
2
votes
2answers
256 views
Trying to simulate a cannon ball
I'm writing a game, and I need to simulate a the path of a cannon ball.
I imagine I would have the initial velocity vector, and a vector for gravity.
Is there a good tutorial on how to do this?
(maybe ...
2
votes
2answers
251 views
I'm looking for a paper from Teknikus.dk
I'm looking for this great paper about Verlet integration: http://www.teknikus.dk/tj/gdc2001.htm
I've found this link on many websites, forums, blogs, everyone is recommending it !
The website is ...
2
votes
2answers
892 views
Farseer - Apply Impulse
I'm new to Farseer and have a simple question. The demos I went through didn't seem to demonstrate what I want. I would like to apply an impulse (not force) to an object at a specific position on that ...
2
votes
1answer
99 views
Physics movement prediction is way off [closed]
I'm making a simple, non-networked game. There are two players and a ball. In implementing the AI for the second player, I've run into a huge problem predicting where the ball will hit the ground. ...
2
votes
1answer
206 views
How to make a character in a Box2D world jump faster?
I have a question about using Box2D to simulate a physics-platformer.
I manage to make the character move to the right and left, and jumping as well. However, jumping seems extremely slow when ...
2
votes
1answer
118 views
Apply force to a specific point on a rigid body
In unity I have a rigid body object and would like to apply force to a specific point. For example say I had a cube, I want to hit just the top right corner so it spins as a result. One idea I had ...
2
votes
2answers
253 views
What is the best way to check if there is overlap between player and static, non-collidable items in bullet physic engine
I'd like to add non collidable objects (eg: power ups, items, ...) in a game world using Bullet Physics Engine and to know if there is collision between player and them.
Some info : there is a lot ...
2
votes
3answers
1k views
Game physics / 2D Collision detection AS3
I know there are some methods you can use like hittestPoint and so on, but I want to see where my movieclip colliedes with another another movieclip. Any other methods I can use?
by any chance does ...
2
votes
2answers
239 views
Physics system imploding under force
I have a basic physics body system (incomplete/very basic; as collision resolution and detection are not implemented, just mass, position, velocity, acceleration, force and impulse).
I implemented ...
2
votes
1answer
114 views
Understanding Tensors [closed]
I don't seem to be able to visualize tensors. I am reading The Morgan Kauffman Game Physics Engine Development and he uses tensors to represent aerodynamics but he doesn't explain them so I am not ...
2
votes
1answer
484 views
Box2D + Love2D (Lua) - Assertion fail with polygon meshes
When I try to create a triangle collider for my game it sometimes leads to an assertion fail. I use the physics engine that comes with love2d (Box2D). That's the error message that appears when the ...
2
votes
1answer
2k views
Creating sideways friction in a 2D top down racer
I've been playing around with trying to create some kind of top down racer but I'm having trouble getting the car to turn properly. At the moment this is the code I have to update the position of the ...
2
votes
2answers
303 views
Understanding Fixed time step
From what I understand about time based Euler Integration is that you will set a number of pixels you want your object to move in the space of second and then the value will be regulated based on the ...
