Relating to the motion of objects through space and time. Including concepts such as acceleration (thrust and gravity), mass, collision response, friction and more.

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Issue with implementing friction for player movement

I have been writing a 2.5D FPS engine in the same style of Doom and Duke Nukem 3D. The game is 3D rendered but the world is represented in 2D. This is my current position update code for an entity ...
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19 views

Handling gyroscope data

I'm working on a mobile game that allows user to rotate player around an axis using accelerometer. In addition to that, to allow fast, almost instant, rotation I thought of using gyro data. It seems ...
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2answers
109 views

Artillery Simulation [duplicate]

I need some help on a simulation of an Artillery like this one https://www.youtube.com/watch?v=YktWSKo_UbA. I cant figure out how to make the "tomato" to get to the selected spot. Where can I get ...
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221 views

Spin wheel with gesture in Andengine

I want to implement Fortune wheel in Andengine. The wheel would start spinning based on the speed of a finger fling. Then it would stop slowly like real Fortune wheel. What I am able to do now is to ...
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159 views

Polygon Collision Response

I'm working on a game engine that has a built in custom physics engine (I know it's a waste of time, but I have years to make this, so why not make it good?). Currently, with any number of polygons, ...
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1answer
172 views

Grid collision - finding the location of an entity in each box

I am trying to implement grid-based collision in a 2d game with moving circles. The canvas is 400x400 pixels. Below you can see the code for my Grid class. What I want it to do is check inside which ...
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54 views

Lateral Friction Phisics

I am trying to create a physics engine for my game, and need to cancel out any lateral velocity for when entities turn. I have tried to mimic this page's example, but it is not working. I have objects ...
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30 views

Steer a flock towards a target? Like in pikmin? [duplicate]

Can a flock be steered towards a target ? I've seen that flocking behavior has the alignement behavior, but can it be directed and steered toward a goal ? ...
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18 views

Making an object fly in an arc (a parbola) [duplicate]

I'm making a game where there should be a robot throwing ball-shaped objects at another robot. The balls thrown should fly in the shape of a symmetrical arc. Pretty sure the math-word for this is a ...
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1answer
136 views

Box2D + Citrus Engine - Proper Pong Paddles

I am creating a pong clone for my first Citrus Engine project using Box2D. I've tried two types of paddles, both do not fully work. 1) Paddle is a dynamic body with a restitution of 1.0 and friction ...
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2answers
4k views

Why would Rigidbody.AddForce not resulting in movement of my objects?

I'm trying to get my card objects to spread out randomly but nothing happens. I know the method is called cause I get the prints in the console for each card. But they don't move. No errors reported. ...
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42 views

Collisions and objects going through each other [duplicate]

I am making a 2D game with physics based collisions implemented in it. So objects collide as they should, but if they're going too fast towards each other, when they collide they go through each ...
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59 views

how to stop enemies from moving to one point when lots of them are chasing one object [duplicate]

i am making a top down game which lots of enemies are chasing one guy. then,enemies would move to one point without any collision,they just overlay each other. so ,is there any simple way to make ...
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1answer
367 views

Trouble with a modified parallax scrolling concept

I have a set of layers (each of them being a list of items) moving with different speeds as I mentioned here: http://stackoverflow.com/a/18962019/270197. Layers back in the scene move with slower ...
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0answers
1k views

Platform game: applying gravity and jumping [duplicate]

I am making a 2D platform game in Java but I don't know how to apply gravity and jumping on my player and other living creatures in game that it looks natural and that it is physical correct. I have ...
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1answer
961 views

gamemaker getting a ball to bounce 90 degrees off of a 45 angle

I am trying to get a circle to bounce off a 45 degree diamond shap using Gamemaker Studio. I would like the ball to bounce in straight lines so my directions would be 0, 90, 180, or 270 degrees, ...
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0answers
91 views

Game physics movement [on hold]

I am trying to write some code in Pygame that will achieve smooth movement from place to another. I've been able to do some nice physics for jumping but when I need to move horizontally I am not sure ...
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1answer
578 views

Detect when a bullet rigidbody is on ground

I have a rigidbody that is on top of a plane or another rigidbody. How do I check if said rigidbody is on top of it? I tried to check the Y-part of the velocity but it is never 0, it is always a ...
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0answers
52 views

Decaying velocity for simple ball physics [duplicate]

I am writing a little experimental 2D program in Java to understand the basics of physics in games. I read this article on game physics to get me started and want to implement the simple Euler method ...
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0answers
241 views

Farseer: Difficulties with implementation of DebugView

I added the project "Farseer Physics Engine 3.3.1 HelloWorld XNA\DebugView XNA\DebugView XNA.csproj" to my solution explorer in Visual Studio. In addition, I added a reference to my project and the ...
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1answer
72 views

Farseer: RemoveBody is not working [closed]

I want to remove bodies after they touched the character(playerrect). But the bodies get not removed. I set a breakpoint in the following line but it doesn't get yellow: ...
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0answers
43 views

3D Sandbox game: Detecting when a block is no longer attached to the ground [duplicate]

I've been playing "Ace of Spades" recently, mostly because my son likes that. They have a feature that my son calls "gravity", but I don't know the official name. Anyway, the effect of "gravity" is ...
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0answers
30 views

Farseer physics engine: The name 'ConvertUnits' does not exist in the current context [duplicate]

http://digitalerr0r.wordpress.com/2012/03/11/farseer-physics-in-xna-4-0-for-windows-phone-1/ I tried this Farseer tutorial but I always get that error message in the following lines: ...
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171 views

Simulating smooth movement along a line after calculating a collision containing a restitution of zero in 2D [on hold]

[for tl;dr see after listing] //...Code to determine shapes types involved in collision here... //...Rectangle-Line collision detected. ...
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140 views

Farseer non-colliding bodies affect eachother [on hold]

I'm trying to use Farseer to make a tile engine, but bodies that are not colliding with a sprite are still having an effect on it. In this image there is a single sprite(the green box) and a single ...
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1answer
330 views

Why is my character not moving when applying an acceleration to it?

I'm having issues with my character in terms of gravity and the character bouncing up and down. You can find more information about it in the link below. Character bouncing off ground due to gravity ...
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2answers
438 views

iphone 3d library with physics

are there any light 3d iphone libraries that must have: Physics ( ragdoll physics ) 3D scene graph Advanced lighting (lightmapping and stuff) Sound engine Ability to import 3D model from blender, 3d ...
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0answers
227 views

Simple project - make a 3D box tumble and fall to the ground [duplicate]

Possible Duplicate: Resources to learn programming rigid body simulation Hi guys, I want to try learning rigid-body dynamic simulation. I have done a fluid and cloth simulation before, but ...
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1answer
50 views

How to resolve OBB collision penetration?

I would think this is a common issue, but I couldn't find an answer that helped me. Help would be appreciated. In my game I have rectangular objects. They have rotating bounding box, aka not AABB but ...
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3answers
83 views

How to apply logarithmic type formula for speed?

I want my character's speed to ramp up using somewhat of a logarithmic formula. I am confused about how specifically I would implement this. I want the character to move fast with a little movement as ...
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1answer
118 views

Relative Position/Rotation calculation

I have 2 objects each with a 3x3 Matrix (Orientation) and a Vector3 (Translation). Both are relative to world coordinates. How do I calculate the position and orientation of object B in relation to ...
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4answers
933 views

Open Dynamics Engine

Has anybody used this library before? What were your experiences? Pros/Cons?
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1answer
142 views

How to make “they need to be fed” movement style [closed]

This is the game for people who don't already know it: youtube video I am looking for theory about making an object move around another object and stay stuck to it. How would I implement something ...
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1answer
659 views

Breakout… Getting the ball reflection X angle when htitting paddle / bricks [duplicate]

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 ...
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1answer
994 views

“Car” movement in 2D dimension [closed]

I am searching for a simple tutorial how to add arcade car physics for my game. Exactly same user units behaviour i found in next games: Tank Hero: Laser Wars Death Worm: Video: ...
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3answers
487 views

Can these game be fully coded in html5/javascript? [closed]

I mean the mechanics of the game. Would it be possible? -Pokemon GBA series, rendering the world would be easy, but what about battle mechanics? -MapleStory, after seen dragonbound.net which is an ...
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1answer
1k views

No collision detected with 2D rigidbody

No collision detected with 2D rigidbody 0 I have a ZombieBoy with a circle collider2D and a box collider2D and a RigidBody2D . The player shots energy balls which has a Circle Collider2D and a ...
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2answers
183 views

Using Geometric Slerp to move Camera

I'm writing a program in C++ using OpenGL and GLM; I'm trying to get my camera to follow my car. So far it successfully follows it around the screen, but I'm having trouble adjusting the Camera's ...
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1answer
393 views

Air Resistance of a Falling Object

I am applying air resistance to a falling sphere using the Euler method. If someone could have a look and tell me if my implementation is correct or offer any tips, it would be highly appreciated. ...
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1answer
187 views

Creating physics in xna

I am creating a racing game using visual studio 2010 and xna 4.0. I'm trying to create some simple physics so my car sticks to the heightmap I have created within my game world and the model adjusts ...
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1answer
151 views

Interacting with box2D objects

How can I interact with an object in box2d, I'm completely new to this so I have no clue what to do. The box is created like this: bodyDef.type = b2Body.b2_dynamicBody; fixDef.shape = new ...
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0answers
53 views

Making a line/rope follow the character

i have a main character that walks in all directions (up, down, left, right). What i want is this: The player goes to the point A.. When he reaches the point A and touch the button, a rope is gonna ...
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votes
1answer
102 views

Can not seem to adjust the speed of my Car

I'm programming in C++, rendering in OpenGL and using GLM for matrix/vector manipulation and I have implemented very (very) basic car controls; ignoring many forces that are present in reality. Since ...
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2answers
460 views

Move a player in the opposite direction they are looking

I'm looking to move the player in the opposite direction they are facing with a specified force. Rather than try to explain that better I created an image showing what I mean, I've tried reversing ...
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votes
1answer
149 views

Is there any physics engine for XNA? [closed]

I am an XNA game developer. I am now starting to develop physics games on XNA but the problem is that I don't know about any physics engine desinged for XNA. Please if you know about it kindly help ...
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votes
1answer
229 views

forward motion car physics - gradual slow

Im having trouble creating realistic car movements in xna 4. Right now i have a car going forward and hitting a terminal velocity which is fine but when i release the up key i need to the car to slow ...
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2answers
381 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 ...
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0answers
67 views

ball 2d animation [duplicate]

Possible Duplicate: canvas ball physics animation I want to animate ball in html canvas like this. ctx.beginPath(); ctx.arc(75, 75, 10, 0, Math.PI*2, true); ctx.closePath(); ctx.fill(); ...
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1answer
1k views

Ball Physics for Android Game

I am starting work on a new Android game and I haven't had any experience implementing physics before. I am trying to steer clear of external libraries such as box2d, not just because I think it is ...
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2answers
143 views

Character bounces/stutters down hills

I'm using Unity3D (not 4) and I'm experiencing a bit of a problem with character movement. I'm using a cylinder as a First Person player with a child Main Camera. In this cylinder is the stock ...