Hi, I'm new here. I'm trying to make a top-down spaceship game and I want the movement to somewhat realistic. 360 degrees with inertia, gravity, etc. My problem is I can make the ship move 360° with inertia with no problem, but what I need to do is impose a limit for how fast the engines can go while not limiting other forces pushing/p...
The problem is straight forward: 1) We have a photon traveling from Point 1 (x,y,z) to Point 2 (x,y,z), both of which could be located anywhere in 3D space. 2) We have a polygon that is both rotated randomly on the x-axis and/or y-axis and also located anywhere in 3D space. 3) We want to find: a) if the photon will collide with the p...
As a quick overview: I'm trying to make a game of pool using Box2D as a basis. Now my question: How should I set up the billiard balls and edges so that they act normally? The balls sometimes seem to stick to the edges for no apparent reason. I've got four static wall objects with a restitution of 1 around the edges of the table. Ea...
I always hear the relationship between collision detection and the different space partitioning techniques. Do any physics libraries contain common data structures like maybe a frustum class or anything that would make it easier to implement octrees, quadtrees, etc? ...
Hi, I know this question is definitely solved somewhere many times already, please enlighten me if you know of their existence, thanks. Quick rundown: I want to compute from a 3 axis accelerometer the gravity component on each of these 3 axes. I have used 2 axes free body diagrams to work out the accelerometer's gravity component in the...
Hi, Crayon Physics is a wonderful game because of the real motion of all the objects. Gravity and collision are two very important things in that game. I know that is the reason why it costs $19.95 Damn, this is quite difficult to write down my question!! But, is/are there (an) equivalent open source project(s)? I'm very interested in ...
Using Bullet 2.76 I'm trying to freeze an object (rigid body) so that it instantly stops moving, but still responds to collisions. I tried setting it's activation state to DISABLE_SIMULATION, but then it's virtually nonexistent to other objects. Furthermore, if objects "collide" with it when it's disabled, strange things begin to happen...
Hi, I wanted to simulate the following through animation : A ball starts with a certain velocity at the bottom most point of a vertical circular loop and keeps rolling in it until its velocity permits. For this, I wanted to find velocity/x/y vs. time equation. For e.g. if the ball had mass : 5Kg, radius of the circular loop = 10m, and...
*edited 6/17/10 I'm trying to understand how to improve my code (make it more pythonic). Also, I'm interested in writing more intuitive 'conditionals' that would describe scenarios that are commonplace in biochemistry. The conditional criteria in the below program I've explained in Answer #2, but I am not satisfied with the code- it wor...
I have no working code at all, but I'll post my method of display the image I need to bobble. public void onDraw(Canvas can){ can.drawBitmap(bobbleHead , xpos, ypos, p); } I have xpos and ypos declared. ...
I have a number of rectangular elements that I want to position in a 2D space. I calculate an ideal position for each element. Now my problem is that many elements overlap as very often the ideal positions are concentrated in one region. I want to avoid overlap as much as possible (doesn't have to be perfect, though). How can I do this? ...
http://itunes.apple.com/us/app/angry-birds/id343200656?mt=8&ign-mpt=uo%3D6 So I am getting started with this all game dev thing on iphone and I decided that I will start playing with Cocos2d as my starting engine. Now just so i have a goal in mind, I picked angry birds as my initial target of what sort of game play would I like to...
Given an image of a 2-dimensional irregular (non-convex) shape, how would I able to compute all the ways in which it could lie stable on a flat surface? For example, if the shape is a perfect square rectangle, then it will surely have 4 ways in which it is stable. A circle on the other hand either has no stable orientation or every point...
I am running a physics simulation and applying a set of movement instructions to a simulated skeleton. I have a multiple sets of instructions for the skeleton consisting of force application to legs, arms, torso etc. and duration of force applied to their respective bone. Each set of instructions (behavior) is developed by testing its ef...
Hi, I'm getting crazy... I succeed installing box2d into my project. But how can I draw a body? Of course I need an engine to draw with, but that doesn't matter now (SDL). I just want to reach that I can get all the coordinates of the points that represent the body-polygon, to draw it with the engine. (Not relevant for circles) If you ...
I'd like to build a game to learn cocos2d. Lunar lander is the first exercise coming in my mind. Any pointer/source code/tutorial of the physics calculations required will be appreciated. Thanks! ...
Working with iPhone and Objective C. I am working on a game and I need to correctly reflect a ball off a circle object. I am trying to do it as a line and circle intersection. I have my ball position outside the circle and I have the new ball position that would be inside the circle at the next draw update. I know the intersect point of...
Hello. For school I have to make a game for my iPod touch, I chose to do an asteroids game. I have just started with cocos2d but have read the wenderlich blog. I wanted to use chipmunk in my game, i want realisitc motion of the ship. Is there a tutorial on creating the asteroids motion? Thanks. ...
Ok i know this is quite off-topic for programmers but still I need this for app, so here it is: Ballistic curve (without wind or any other conditions) is specified by these 2 lines: So, there is a problem that you got 3 unknown values: x,y and time t, but only 2 equations. You can't really compute all 3 with just these values, I go...
Hi, I have a projectile that I would like to pass through specific coordinates at the apex of its path. I have been using a superb equation that giogadi outlined here, by plugging in the velocity values it produces into chipmunk's cpBodyApplyImpulse function. The equation has one drawback that I haven't been able to figure out. It onl...