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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1
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1answer
668 views

Cocos2dx+Chipmunk: Fully elastic collision between moving bodies

I'm using Cocos2dx and the built in Chipmunk physics engine, and currently I've got my PhysicsBodys' materials set up with: Density=0 Restitution=1 Friction=0 in order to get fully elastic ...
0
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1answer
267 views

LibGDX make an object rotate around something

I need to rotate and object, which should be a circle made up with a ShaderRender, around a specified point. In LibGDX there is a method or something which allow me to do this? If it doesn't exist how ...
2
votes
1answer
88 views

Bullet Physics: Difference between Motion State and World Transform

In Bullet Physics, when I create a new btRigidBody, one of the parameters passed to the constructor is the btMotionState, which defines the initial pose of the body. However, if I then later want to ...
0
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1answer
47 views

How can I handle multiple force in Unity?

I'm trying to get my character to perform a "dash" where their x velocity increases rapidly and then falls over time. However, I'm also maintaining a constant x velocity so the character appears to be ...
1
vote
1answer
76 views

How to calculate distance of travel needed get achieve speed x?

I have a boat traveling at 20 meters/second approaching destination x. Destination x has a range radius of 10 meters. What I would like to do is make sure by the time the boat arrives within 10 meters ...
1
vote
1answer
222 views

Unity 5 Server Side Physics - Alternative to constant position update?

I am looking into reducing load in client server games for a uni project and am looking at physics. The idea is that if a very low powered device tries to carry out some physics heavy action that it ...
3
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0answers
84 views

Everything is set to Bounciness 0 - Why am I still bouncing?

I am creating a platformer where rather than manipulating the character to get them from the beginning of the level to the end, you manipulate the world. Thus, when you want to make the character ...
0
votes
1answer
62 views

Issue with detecting collisions in Pong

I've been working on making Pong in OpenGL and SDL and currently have both paddles and the game ball set up properly. I have an Object (or Entity) class which is used to instantiate each of the ...
3
votes
2answers
523 views

Preventing a Combination of Rigidbody Jump Force & Bounce Magnitude in Unity3D

I'm building a fairly simple marble racing game in Unity3D. The ball is a 3D physics object that moves only on the X and Y axes. It has the ability to roll left and right, and to jump. Pretty basic ...
1
vote
1answer
70 views

How to get dynamic RigidBody rotation/tilt on uneven platform?

I have a rigid body with PolygonCollider2D which has some complex circular shape and I'm using uneven platform. Im using Following code to move the object forward CharacterRigidBody.velocity = new ...
0
votes
2answers
84 views

Keep gravity velocity the same all the time

I have 2D rigidbodies that fall to the ground, however they speed up while falling. Also, when they freeze in the air and then unfreeze, the velocity is set to 0 and they gradually start speeding up ...
0
votes
2answers
369 views

Moving one object from one point to another with acceleration

How would someone implement moving an object from one point in 2D space to another using these formulae to update objects: m_position.setX/Y( m_position.X/Y() + m_velocity.X/Y() * dt + 0.5 * m_acc * ...
1
vote
1answer
508 views

Bullet 3D Physics Objects Not Rotating?

So I've got Bullet 3D controlling the motion of objects rendered with DirectX. In the clipping below I've got 2 identical rectangles & 5 balls. The lowest rectangle has a mass of 0 and doesn't ...
0
votes
0answers
23 views

Problems with voxel physics

So I have a problem that is divided into performance and how to solve it in voxel physical, obs: I'm using Cubiquity. What am I doing: I test all the blocks. When a different block and air is greater ...
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votes
0answers
35 views

What is the best choice for driving simulator development [closed]

I want to make a driving school simulator. I looked at the open-source tools for the purpose but I found nothing only opends.de.But it seems extra price for additional functionality. Are there any ...
27
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6answers
35k views

How can I implement gravity?

How can I implement gravity? Not for a particular language, just pseudocode...
0
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0answers
26 views

Constant orbit using Rigidbody in Unity

I'm trying to make a few game objects (moons) orbit a planet in unity. Basically just picture a planet in the center of the screen, and a few small moons that orbit the planet with a constant ...
0
votes
1answer
79 views

Libgdx Fine Tune Megaman Movement

With help from my last question, I was able to fix the issue of having a stuttering effect if you keep hitting jump, while jumping. I believe I have managed to match moving on the X axis and the ...
17
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3answers
10k views

What is a good book on physics for game development? [closed]

I'm looking for a good beginners' book on the subject of physics in game development. Something that focuses on 2D games would be preferable.
0
votes
4answers
132 views

Lunar Lander calculating gravity, acceleration and collision in GameMaker

I've already asked this on the GameMaker forums but had no response so far. I'm making a little Lunar Lander game as my first foray in to GameMaker, I'm wanting to have the ship land and take off ...
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0answers
29 views

Collision detection with Physics P2 in Phaser.io

had written this thread that relates to a project I'm developing while trying to learn phaser. I could really use some advise/ feedback on making the user experience a bit more easier as I seem to be ...
0
votes
0answers
12 views

Unreal Engine Physics creation is slower in Editor

I just figured out that when UPrimitiveComponent::CreatePhysicsState() is called, it calculates the mass, but only in editor, also when i build for non-editor it is faster (standalone) this is not ...
0
votes
1answer
311 views

How to get plausible platformer physics with Farseer on MonoGame/XNA?

I am creating a 2D Vectorial (made of polygons, not tiles !) platformer using MonoGame and Farseer Physics Engine. Everything works perfectly, except the movement of the character which doesn't feels ...
2
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4answers
2k views

Do two balls of different mass bounce different heights?

There are two balls and the only difference between them is the mass. Both are dropped from the same height on to the floor (static object with infinite mass), would both balls bounce up to the same ...
0
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0answers
23 views

Dropping through a platform in Clickteam Fusion 2.5

I am using Clickteam Multimedia Fusion 2.5. Currently, I have a rudimentary platformer game, with the following setup: player object is set as a physics platform, with the physics engine added to ...
0
votes
1answer
18 views

AS3/Flashdevelop - Controlling a 2D character to move around a planet with gravity

With a little help I have managed to create a 2D planet with working gravity that constantly pulls a character towards its center. The only problem now is that I am completely stumped on how to make ...
0
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0answers
15 views

Make Kinematic P2 Body collide with world bounds

I have a P2 object( A) with a custom bound that detects collision with another P2 object(B ). However, object A is set to be kinematic rather than dynamic as I do not want object A to react to ...
1
vote
1answer
425 views

XNA (BEPU) Physics Performance

Im using XNA 4.0 with the BEPU physics engine v1.2 and I have encountered some performance problems on Xbox. Im not sure if the my mesurements are an expected result of the Xbox (with alot of dynamic ...
1
vote
1answer
679 views

Swinging a sword in Xcode with Sprite Kit

I'm working on making an RPG in Xcode, and I'm having a major gameplay issue when it comes to having my character swing his sword in a way that is realistic and gameplay compatible. Right now, when ...
1
vote
1answer
52 views

AS3/Flash Develop - Radial Gravity (character on planet simulation)

I am trying to create a program where a character shape will be constantly drawn towards the centre of a planet shape. I have taken on previous advice into using physics equations to generate the ...
3
votes
2answers
404 views

Sprite Kit - containsPoint for SKPhysicsBody?

I have a ball bouncing around the screen. I can pick it up and drag it onto a "bucket". When my touches finish, I use the containsPoint function to check and see if I have dropped the ball onto the ...
0
votes
2answers
35 views

Collider not working

I have a 2D object (without a parent) with a 2d box collider (dimensions are not small) added to it and set as trigger when I place it in the scene it works just fine however when I instantiate its ...
2
votes
1answer
87 views

2D Change Velocity Based on Distance XY While Moving Parabolic Arc

What I'm trying to achieve is that the entity moves in a parabolic curve, and no this has nothing to do with gravity before you ask. I give the entity a target position which it should move to, but ...
4
votes
2answers
289 views

How to impale and stack targets correctly according to the collider and its coordinate?

I'm making another simple game, a catch game, where a spawning target game object must be captured using a skewer to impale it. Here how: At the start, the falling object (in red) will fall in a ...
0
votes
0answers
10 views

Limit rotation of flipper joint?

I have a working RevoluteConstraint using Phaser.P2.Body, and the motor enabled with the speed of 1, the flipper appears as it should, but only rotates around slowly. I'd like to set the normal ...
0
votes
2answers
687 views

Use both AddForceAtPoint and change velocity property?

I'm using Rigidbody2D for some game objects. It seems that when I AddForce() or AddForceAtPoint(), the game objects are mostly affected on the Y axis and hardly at all on the x axis. I don't ...
0
votes
0answers
14 views

Move ball through a direction angle in android canvas [duplicate]

I am building a simple game in android. I am successful in first step where I draw a ball in canvas in touch point. Now I am trying to move it from an initial point A (center) through the touch point ...
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votes
0answers
9 views

Phaser P2 RevoluteConstraint motor not working

The following code produces a flipper and four balls that seem to interact as they should. They all collide with each other and the game world bounds. The problem is that the motor isn't working, nor ...
1
vote
1answer
526 views

How to move rigidbody player to its facing direction with AddForce?

How can I move a rigidbody to its facing direction? I've already tried this: rigidbody.AddForce (transform.forward * v, ForceMode.Acceleration); // v is a public float which gets a new value in ...
0
votes
1answer
214 views

Moving CCNode with constant speed in cocos2d

I want to move the object (CCNODE) with constant speed in any direction , what i have did till now is applied a force to object at start to get it moving and set elasticity as 1 and friction as 0 to ...
3
votes
2answers
64 views

Stopping 3D object in place

I am at 1.2 stage (moving the player) at Unity course "Roll-a-ball" and have question: I want to add feature that stops a player and sets his new position on 0, 0, 0. I can reset the position, but I ...
4
votes
1answer
128 views

How to resolve push block physics in a 2D side scroller puzzle

I've been working on a 2D tile-based side scroller puzzle game in Unity with obstacles such as doors, keys, fans, portals, etc., but one type of obstacle, push blocks, is giving me some issues. Here ...
3
votes
2answers
1k views

Spritekit - gradually apply force vector in different direction (space ship turning)

I have a space ship that I'm applying a force vector to using a joystick for control. I would like this to smoothly fly around when I'm switching directions.. Exactly like minisquadron if you've ...
0
votes
3answers
213 views

How to implement jump in a 2d game?

I am trying to implement jump in a game I have written for android using canvas. I have referred this tutorial for implementing jump. My code is like if(jumpKeyPressed){ jumpVel = ...
0
votes
1answer
72 views

Simple 2.5D flight movement

I'm building a simple 2.5D Dogfighting game, kinda similar like this one: https://gfycat.com/PleasantDeterminedArcherfish for the moment my movement works like this: if (Input.GetKey("left")) ...
2
votes
3answers
121 views

Accelerated movement in a specific time to a specific point

I am trying to move my sprite in a specific time to a specific position while using frame-independent or time-dependent movement. My sprite is also accelerated every frame to simulate gravity. I know ...
2
votes
2answers
58 views

Rigidbody2D Circular Orbiting

I am trying to create a basic solar system in 2D. All space objects has CircleCollider2D on them (which are required for raycasting in another script). Currently planets are childs of stars, and ...
0
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1answer
37 views

BulletPhysics ship rotation

First of all, I'm a beginner in game physics, and I think this is a relatively easy problem that I'm not grasping. Short Version: I have a box(representing a ship on water) going forward with a ...
0
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2answers
48 views

need to make a ball travel in the angle it was hit from

self.hitBall = function (ball, x, y){ var angle = Math.atan2((x - ball.centerX), (y - ball.centerY)); ball.velocityY = (Math.sin(angle) * 10); ball.velocityX = ...
2
votes
1answer
121 views

Twin-stick controls for a cohesive group of agents

I'm trying to implement a classic twin-stick controller for a group of physics-based game objects. Here are the rules I'm trying to follow: Agents always stay close to each other within a certain ...