Tagged Questions
8
votes
2answers
274 views
Drone targeting
Imagine a "drone" and a target point on a 2d plane. There are eight parameters:
P = my position
Q = target position
V = my velocity
I = my moment of inertia
w = my angular velocity
s = my angular ...
4
votes
1answer
211 views
2D car physics and high speed turning
I've been looking at the following page, which has been very helpful: http://www.asawicki.info/Mirror/Car%20Physics%20for%20Games/Car%20Physics%20for%20Games.html but have come into problems with the ...
5
votes
3answers
256 views
How can I change the acceleration of an object to arrive at a particular time?
I'm trying to write some code to change an acceleration factor so a ball will arrive at a destination in a desired time.
The problem is I don't know time (t) but I do know I want it to arrive at (t - ...
0
votes
1answer
83 views
Jump function of player [duplicate]
I'm developing game in marmalade sdk in c++. I have player in the area.and I wanna make him jump when i pressed a button.When I use this player.moveUp(5px); it just go up 5px, but he has to fall down ...
1
vote
2answers
127 views
Distribute circles evenly on Screen - circle packing
I want to evenly distribute a random amount of circles with random diameter on the screen for. This level doesn't scroll so the users screen resolution sets the limits. Further I would like the ...
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. ...
1
vote
0answers
150 views
How do I implement a physics gun?
I'm currently trying to implement a physics gun for my game. What I want is for the entity to stay in the same position on the screen no matter how I wiggle the camera about, what is the correct way ...
-2
votes
1answer
153 views
Move projectile in direction the gun is facing [duplicate]
Possible Duplicate:
Move sprite in the direction it is facing?
I am attempting to have a projectile follow the direction a gun is facing. When using the following code I am unable to make ...
1
vote
1answer
209 views
Point inside Oriented Bounding Box?
I have an OBB2D class based on SAT.
This is my point in OBB method:
public boolean pointInside(float x, float y)
{
float newy = (float) (Math.sin(angle) * (y - center.y) + Math.cos(angle) *
...
39
votes
4answers
775 views
How to determine which thrusters to turn on to rotate the ship?
The configuration of the ship changes dynamically, so I have to determine which thruster to turn on when I want to rotate the ship clockwise or counter clockwise. The thrusters are always axis aligned ...
1
vote
2answers
96 views
How do I apply a force using the object direction and speed?
I have a 3D object moving and I need to be able to apply forces to it such as gravity. In 2D, I would simply store its movement in dx and dy, but since this is in 3D, I am using a Vector3D direction ...
-1
votes
1answer
277 views
Breakout… Getting the ball reflection X angle when htitting paddle / bricks
Im currently creating a breakout clone for my first ever C# / XNA game. Currently Ive had little trouble creating the paddle object, ball object, and all the bricks. The issue im currently having is ...
2
votes
4answers
391 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 ...
0
votes
0answers
205 views
Java Collision Detection of a Slope using a Gradient [closed]
Im testing out collision detection for a game, The ball is traveling and i need to know when the ball hits a sloped line.
For this example i have used the whole screen, with a sloped line going from ...
0
votes
2answers
475 views
Calculating angle between two vectors to steer towards a target
I have been trying to implement a path following steering behaviour for AI in a 2D racing game.
I have two vectors:
futurePosition represents the predicted future position given the car's current ...
1
vote
2answers
271 views
Aligning bullet's position in Asteroid Game
I'm writing an asteroid game and I would like to align the bullets on the ship's tip. I also want when the ship fires, the bullet gets the same orientation(angle, direction) of the ship and also be ...
5
votes
1answer
298 views
Predicting physics/trajectory for pool/billiards games
I'm thinking of making a quick proof of concept of a billiard-style game mechanic, where the player has perfect information of what is about to happen.
Here's a good example:
I'm only mildly ...
0
votes
2answers
333 views
Asteroids Ship Movement
I have read source code of asteroids game. I want to know why when updating the ship's position in X, and Y Axis, we must write it in sin and cosine of the current angle. Is it angular velocity ? why ...
-1
votes
2answers
261 views
How should I learn about collision detection?
If I want to use physics engine for my game then how should I go to learn collision-detection algorithms?
When I read AI book for games, the book talks about collision detection, so I want to learn ...
2
votes
1answer
164 views
Electricity and Magnetism: Relevant?
The computer science major at my university requires that I take a sequence in either biology, chemistry, and physics, plus an additional natural science course (which I might fill with meteorology). ...
0
votes
3answers
355 views
Game Institute Math Courses
I'm 21 years old and I suck at math, I mean really bad. I don't have the necessary logic to apply it towards programming. I would like to learn the math and logic of applying it. I found Game ...
6
votes
2answers
230 views
Elliptical orbit modeling
I'm playing with orbits in a simple 2-d game where a ship flies around in space and is attracted to massive things. The ship's velocity is stored in a vector and acceleration is applied to it every ...
7
votes
2answers
539 views
Calculation of Inertia Tensors
Bit of a complex and lengthy question that, I'll admit, I don't quite understand very well yet so I will try and explain as best as I can.
Short Version: Is there a general c++/physx formula out ...
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?
1
vote
1answer
149 views
Anybody remember this webpage? [closed]
I remember visiting a webpage some time ago (1 year ago maybe)
It contained many java applets, describing how certain mathematical functions like sin, cos, arcsin, exp would make an object move, with ...
4
votes
3answers
1k views
Determine Resulting Angle of Wall Collision
So I have an object moving in a direction towards a fixed horizontal or vertical wall. How do I compute the angle that the object should bounce off at? The object can approach the wall at an arbitrary ...
2
votes
3answers
756 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 ...
4
votes
2answers
300 views
Box-box contact information
I have two colliding boxes, How i can calculate contact information like (contact normal, contact point and penetration) .
Is there any simple algorithm .
Note: i'm using XNA .
0
votes
2answers
484 views
Ways to define a curve
I'm trying to give shapes in my physics engine roundness/ curvature.
I am aware of various methods for mathematically defining curves; such as bezier-cruves, ellipses, etc. However I am not sure ...
9
votes
1answer
250 views
Deforming surfaces
I try to accomplish an deforming physic behaviour for levelsurfaces, but don't get an idea how to start with the implemenation so far.
Regardless of the shape from the surface (planes, cubes, ...
4
votes
1answer
770 views
How to make a 2D Soft-body physics engine?
The definition of rigid body in Box2d is
A chunk of matter that is so strong
that the distance between any two bits
of matter on the chunk is completely
constant.
And this is exactly what ...
7
votes
1answer
340 views
Projected trajectory of a vehicle?
In the game I am developing, I have to calculate if my vehicle (1) which in the example is travelling north with a speed V, can reach its target (2). The example depict the problem from atop:
There ...
10
votes
3answers
647 views
Random map generation - strategies for scattering/clustering random nodes
I am doing a simple 4X strategy game in space where each node is a point-of-interest (a planet, an asteroid and etc.).
To randomly generate a map, I would follow the steps below
Decide how many ...
11
votes
4answers
612 views
How to get object to lose less velocity as its speed increases
I'm developing a game in Flash and I need a little help. It can be considered a math problem.
My object is flying with speed X and my object can collide with stones. When it collides with a stone, I ...
1
vote
1answer
342 views
Perlin noise example the same on CPU as GPU?
I am looking for an example site with a Perlin Noise implementation in both CPU and GPU, that generates somewhat the same results in those two places.
I see many CPU implementations of Perlin Noise, ...
2
votes
1answer
162 views
Implementing material deformation
I want to implement deformation of plastic material, like plasticine for example. Where should I start to study? What technique should I use?
Thank you for any advice.
EDIT
I want to use it in ...
10
votes
5answers
833 views
How could you parallelise a 2D boids simulation
How could you program a 2D boids simulation in such a way that it could use processing power from different sources (clusters, gpu).
In the above example, the non-coloured particles move around ...
9
votes
1answer
1k views
Angle of Reflection
I have this "Breakeout style" game.
I have a cannon at the center, blocks around the cannon and pads around the blocks. This is how the game looks like:
I've managed to get the collision per ...
0
votes
1answer
335 views
What maths should I learn for game programming, and what aspect of programming does it relate to? [duplicate]
Possible Duplicate:
What math should all game programmers know?
Obviously a good knowledge of maths is essential for good programming, my maths isn’t the best ( I didn’t pay attention in ...
16
votes
1answer
538 views
Recreating retro/NES style physics with intentional imprecision
Background:
I'm having a problem getting the jump curve correct for a retro platformer remake project of mine. The original game is for the NES, and the player's velocity is stored in two separate ...
5
votes
5answers
823 views
Are game programmers aware of all the physics derivatives?
I am trying to study XNA for game programming. XNA has many methods that can simplify developer's life, such as reflecting the vector when it hits a solid plane.
I know these are good and developers ...
10
votes
3answers
478 views
Animated examples of different interpolations formulas: any link?
I remember having spotted a link to a huge page with different equations to non linear interpolation curves, for example if you want to stop a car smoothly, etc.
Those can sometime be useful to ...
9
votes
1answer
947 views
Adding air drag to a golf ball trajectory equation
I'm developing a 2D golf game in VB.NET 2005, but I am stuck on how to implement air or wind drag that should affect the ball.
Already I have these equations for projectile:
Vo ...
4
votes
3answers
561 views
Kepler orbit : get position on the orbit over time
I'm developing a space-simulation related game, and I am having some trouble implementing the movement of binary stars, like this:
The two stars orbit their centroid, and their trajectories are ...
4
votes
4answers
846 views
Physics timestep questions
I've got a projectile working perfectly using the code below:
//initialised in loading screen
60 is the FPS - projectilEposition and velocity are Vector3 types
gravity = new Vector3(0, ...
2
votes
1answer
428 views
Calculate the initial velocity of a 3D trajectory
I've got a 2D projectile code sample working, but would like to extend it to 3D. How would I calculate the initial velocity of the Z-axis? At the moment, I've got:
initVel.X = (float)Math.Cos(45.0);
...
3
votes
3answers
291 views
Adding 'swerve' to a direction
I'm not much of a maths expert, so this is probably quite straight forward. I was playing a soccer flash game where you take free kicks. You provide Power, Swerve and Direction. I'm reading up on ...
3
votes
1answer
247 views
Approximating walking physics via simpler sliding physics
I am modeling walking insects. I implement them as cuboids and use forces (including friction and drag), to control motion. However, the movement characteristics of this 'sliding box' physics don't ...
4
votes
2answers
389 views
How to detect and collide two elastic line segments?
There are 4 moving physical nodes in 3D space. They are paired with two elastic line segments / strings (1 <-> 2; 3 <-> 4).
Part I: How to detect the collision of two segments?
Part II: On the ...
3
votes
1answer
188 views
Follow point of interest by applying torque
Given a body with an orientation angle and a point of interest or targetAngle, is there an elegant solution for keeping the body oriented towards the point of interest by applying torque or impulses?
...
