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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3answers
103 views

Ball oblique impact physic in Java?

I know Q3 + Q4 = 90 I searched internet and many physic topics, but not found how to calculate this values in Java? (I found V3 and V4 but not found Q3 and Q4) So how can i calculate V3, V4, ...
0
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0answers
27 views

GameMaker: Studio - Slow down calculations

I currently have an orbital simulator, with a brilliant answer in another Game Development question here, and would like to know how to slow down the calculations of Game Maker, to be able to do more ...
0
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2answers
69 views

Invalid AABB aabb

Invalid AABB aabb UnityEditorInternal.InternalEditorUtility:CalculateSelectionBounds(Boolean, Boolean) I've got this error when I place any convex mesh collider in scene. What does it mean? Game ...
1
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2answers
170 views

Making a gameObject push the player

I am working on a Unity 3D game for Oculus and I have problems with making my objects to apply physics on a player. So getting rid of a CharacterController and using something like a rag doll is not ...
4
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1answer
1k views

Implementing jumping and heightmaps in 2D RPG/Adventure style games?

I've been putting together, albeit slowly, a traditional style game engine in flash/AS3 along the lines of Alundra/Final Fantasy 3/etc etc.. Everything so far is working smoothly (maps from XML data, ...
2
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1answer
349 views

How do games using physic engines for 2d games handle platform corners?

I have seen games like latest "2'5D" sonics that handle collision detection at platform corners pretty well. The problem I'm having is that my game uses an ellipsoid as my player's body to let it move ...
47
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3answers
12k views

How do I create 2D water with dynamic waves?

New Super Mario Bros has really cool 2D water that I'd like to learn how to create. Here's a video showing it. An illustrative part: Things hitting the water create waves. There are also constant ...
3
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2answers
857 views

What's the best way to handle slopes for a platfomer game using Box2D

I would like to know if there is any known solution for handling the player's movement on slopes using Box2D engine. I tried to do it using a circle as the player. Everything was fine until I tried ...
1
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1answer
65 views

How to detect collision position and that position's texture color in Unity?

I have a prefab and I use Circlecollider2D for physics operations. I want to detect the color of the contact position of the collided objects ? Is is possible by using Unity's collider classes ?
5
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2answers
588 views

How to handle jumping up a slope in a runner game?

In an 2D endless runner, what should happen when the player is running "too fast" up a slope and jumps? For example, in a "normal" case: .O. . __..O_____ . / . / O/ _/ If he is moving ...
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1answer
49 views

How can I accurately simulate orbits in Unity?

I would like to create a space simulation with realistic gravity. This means planets in 3d space which act as central gravity sources and multiple objects which are attracted by those planets gravity ...
2
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1answer
249 views

What is wrong with my 2D orbit calculation?

I am working on a 2D game, and I am working on adding some space physics, so I need to find a way to create a circular orbit. I want to make my game object move on a circular way around a planet. I'm ...
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2answers
104 views

How do I prevent raycast car wheels sliding sideways?

I've been writing a non-realistic car physics engine as a learning exercise, using this article as a reference. I have a car that correctly collides with a terrain and applies the correct suspension ...
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0answers
49 views

Orbital gravity in Unity 5 [on hold]

It's pretty much in the title: how can I make orbital gravity? I am trying to make a space-themed FPS.
0
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1answer
83 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 ...
6
votes
1answer
364 views

Changing orientation by applying torques

Suppose you've got an object floating freely in space. You have a vector you want this object to point towards, and a vector representing the direction it's currently facing. From these two, you can ...
1
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1answer
63 views

Can I use physics in Isometric map based games?

I am trying to use physics in my game which is an isometric map based strategy game that the player deals with a city full of buildings, roads and people in it. I am writing the game with Swift and ...
1
vote
1answer
324 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
102 views

Collision between a sphere and a mesh(height-map)

I am trying to implement a method that detects the collision between a sphere and a mesh and reflects the vector of speed. I have a method, that detects a collision between a sphere and a triangle and ...
0
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1answer
83 views

How does orbital math work?

I'm writing a 2d space game, and I want the players to be able to 'orbit' objects and other players (if they're fast enough, of course), but I'm having trouble coming up with the right way to think ...
5
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4answers
4k views

2D Collision in Canvas - Balls Overlapping When Velocity is High

I am doing a simple experiment in canvas using Javascript in which some balls will be thrown on the screen with some initial velocity and then they will bounce on colliding with each other or with the ...
4
votes
1answer
75 views

Predictive Collision Detection - Find Time Of Impact

I have a green box at a starting position A. It can move along two paths A to B is linear motion A to C is under the influence of gravity (non-linear) The thin vertical line is a fixed ...
6
votes
2answers
235 views

How to create rope?

I'd like to re-create this game, but I have no idea how to create the rope, or its influences on the ball. Basically, there is a rope, "attached", at one end, to the mouse pointer, and at the other ...
0
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2answers
303 views

How to design basic physics and movement behavior for 2D platformer?

I want to make a simple 2D platformer. I know some basic 2D physics and how to implement them in a game. How to make a character jump, accelerate, decelerate, etc. But I have no idea how to actually ...
2
votes
1answer
41 views

Getting the Volume of an Uneven Mesh

Let's say I have a cube, and that cube breaks apart into 100 different unevenly sized pieces. How can I get the volume of each of those pieces compared to the cube's volume? Using this in order to ...
1
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2answers
117 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
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1answer
65 views

Find alternate shortest paths in Unity

I'm developing a game in Unity. It's a simple game where the rocket has to reach the point where the player touches on the screen. The movement of the rocket is physics based. When the rocket goes off ...
1
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1answer
935 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 ...
1
vote
1answer
347 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
2answers
185 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
51 views

Restricting body movement withing a specific length while dragging a gameobject in unity

private void OnMouseDrag() { Vector3 screen_sp=new Vector3(Input.mousePosition.x,Input.mousePosition.y,screen_space.z); Vector3 cur_pos=Camera.main.ScreenToWorldPoint(screen_sp)+offset; ...
1
vote
3answers
102 views

How to build a spaceship with interior in unity?

I've begun to study a unity engine in one purpose: I have a great multi player game idea! The main essence: In space there are two (or even more) huge spaceships with crew consisted of players (all ...
5
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0answers
84 views

Orbits: Combine the Pros of RK4, Symplectic Euler, and Verlet Velocity Integrator

Recently, I've implemented and compared a number of basic integrators for my physics engine. The 3 that gave me the best results are RK4, Symplectic Euler, and Verlet Velocity, but I think I need ...
2
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2answers
109 views

Change in direction should slow down object and accelerate in new heading

I'm trying to implement some sort of faux space physics in my 2D game. I have a top down view of my space ship. You can change direction and set a speed up to a maximum which then accelerates the ship ...
6
votes
2answers
2k views

How to calculate the exit speed of ball bouncing off a solid surface

Hey all, I am working on a simple game to include some rigid body dynamics, involving placing (moving & rotating) some springs to bounce a falling ball into a target area. My problem is correctly ...
0
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1answer
33 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 ...
0
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1answer
31 views

Kinematic equations script fail

I added the kinematic equations to my code and now none of it works. I get the error rigidbody.torque assign attempt for 'Enemy' is not valid. Input torque is { 0.000000, NaN, 0.000000 }. ...
4
votes
1answer
217 views

How To Program a fully controllable spring (Damped) motion

i'm working on a project that needs realistic 2D Animation, none linear motion you might say, i have tried many things such as Hermite Curve and a few other motions and in the end Spring Motion. ...
2
votes
0answers
73 views

Path following with Asteroids-like movement. Time to complete path

I'm currently learning about how to do this, but it's best to post the problem beforehand. (posting on Physics and GameDev, as you guys know your math) It's quite difficult to explain. This specific ...
0
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2answers
67 views

Player in Spaceship

I want to realize space game on Unity3d engine. There are some huge spaceships in the void. So, I want players flying in space in weightlessness, but when they go inside any spaceship, they will be ...
16
votes
3answers
3k views

How can I create a stretchy, breakable pizza cheese material?

I want to create realistic pizza and allow user interact with it. What I want: What I created: I created model of the pizza (8 pieces) in Blender, then imported it into Unity. The piece of ...
9
votes
4answers
3k views

Is a separate thread for game loop compulsory for simple games?

I am new to game development. In order to learn I am recreating this game on android platform. You can observe the game-play video at the above link. It is a simple game. I have read a lot of ...
0
votes
1answer
171 views

LibGDX - Executing 2 different touchDown events in the same method

On the bottom left of my screen is a circle with an Arrow and on the bottom right is a circle with a gun. If the player is in jetpack mode and the Arrow "button" is clicked he flies like flappy bird ...
1
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1answer
81 views

How to implement angled surface?

I'am trying to implement 2D platformer game inspired by N game. But the problem is I have no idea how to implement something like this: I have two ideas of how this could be implemented but i ...
0
votes
0answers
21 views

How velocity impacts on CCSprite in Cocos2d Chipmunk?

I am in need of the basic understanding of how velocity changing works? i.e. how CCSprite is able to jump at particular height when some velocity is set? Let me give you an example on which I am ...
1
vote
1answer
55 views

Box2d jetski on water

At the moment I am trying to code a 2d game in java, where a jetski is riding on water. If you press on the screen the jetski should dive down and jump back up on release. How do I have to do this in ...
1
vote
1answer
87 views

How to calculate faces involved in collision (Separating Axis Theorem)

I have a game engine created in javascript (https://jsfiddle.net/4gqsq8wf/) which uses collision detection via the Separating Axis Theorem. Currently, it does not have any means of resolving velocity ...
0
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1answer
547 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 ...
2
votes
2answers
303 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
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0answers
34 views

Gravity and Jumping in Clickteam Fusion 2.5

So I'm currently building a bare-bones functioning game that involves simple platforming. Quite literally a box moving left and right and jumping. I'm using Clickteam Fusion 2.5, and I know there's an ...