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# Questions tagged [physics-engine]

Software for simulating physics like collisions, forces, mass, joints, motion etc. Examples of physics engines are PhysX, Havok, Bullet and ODE.

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### how can I visually compensate for latency in a diep.io style game

implementing extrapolation using linear velocity, orientation and position like on here gafferongames.com/post/state_synchronization/ I'm a little confused if I want to extrapolate from a known ...
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### Can I use the 2d physics engine in a 3d game (or viceversa) in Unity?

This is entirely for performance. The 2D physics are less expensive, but I require 3D for some scenes. I never need both at the same time. I know you can have 2D with an orthographic perspective in a ...
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### Simulating circular motion with gravitational forces in Unity2D

I am currently messing around with a game where you control a black hole and use its gravity to fling planets at targets. I have the gravity calculations working pretty well when the planets start out ...
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### RigidBody Collision Handling with Verlet Integration

Hi I'm reading the Jakobsen Paper "Advanced Character Physics" which explains how the verlet integration along with a tetrahedron (4 particles) can form a structure usable for rigidbody (with 6 length ...
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### Calculating approximations of support/forces between objects in Unity

I'm looking for ways to calculate how much a given object supports another in a scene. For example, imagine a box is on a table. In this situation we may say the table provides support to the lamp (...
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### Numerical errors in Player collision offset causing player to fall through the ground the next frame, how to avoid?

I'm trying to implement player physics with arbitrary objects, in this case, a bunch of cubes. I wanted to add a "floor" so in my cube collision function, I added the following following lines: <...
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### Implement MMO like character movement without a full-fledged physic enginge?

Question: How can I implement World of Warcraft / Guild Wars 2 / etc like player movement, including jumping, without using a full-fledged physic system for my multiplayer game since players only ...
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### Objects aren't rotating in sync

This is a follow-up question to How to reapply force applied to one object to another object I want to make two objects move, react to collisions and other stuff as if they were one. For example, ...
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### How to reapply force applied to one object to another object

Edit: While I wasn't able to make the code work completely, I believe my question has been sufficiently answered. I want to make two objects move, react to collisions and other stuff as if they were ...
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### How do I prevent falling tiles from bouncing on each other in my match 3 game?

I am working on a match 3 game in Unity. The tiles have a RigidBody2D in dynamic mode and a BoxCollider2D. When a match occurs ...
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### Faster convergence in a physics engine

I've got my hands on the first edition of the book Game Physics Engine Development: How to Build a Robust Commercial-Grade Physics Engine for your Game by Ian Millington. Because I didn't really know ...
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### AABB Collision Detection Confusion

I am trying to understand and implement AABB collision to learn simple 2D game physics. I'm following a tutorial and its method is a bit different to other websites. It uses the center of the object ...
7k views

### How can I perform a deterministic physics simulation?

I'm creating a physics game involving rigid bodies in which players move pieces and parts to solve a puzzle/map. A hugely important aspect of the game is that when players start a simulation, it runs ...
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### How can I resolve collisions a little better?

I'm currently developing a physics engine and I'm not sure the best way to go about resolving my problem. I have a little box, that I can move around with in my scene. When I'm resolving collisions, ...
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### Applying friction force not working correctly

I have a simple physics simulation I'm creating whilst following the Nature of Code tutorials on YouTube by Daniel Shiffman, at the moment I've just started learning about friction and have had a go ...
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### Modern way of getting points within a distance?

I'm making a game engine, and some components may want to interact with others based on distance. Currently, the component registers an update listener which runs on a loop, then it checks the ...
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### Gauge vibration

Hello guys Im programming a gauge animation where there is a needle that points to certain values lets say each value equals to the amount of degrees the needle has to rotate to reach said value ...
761 views

### Why not derive velocity from position updates in games?

Is there a reason why retrieving velocity of a 3d object in a game engine vs deriving it from position updates is preferable? I am currently polling position at every step and deriving current ...