Gaffer On Games | Gaffer On Games

Networked Physics in Virtual Reality

Networking a stack of cubes with Unity and PhysX

Posted by Glenn Fiedler on Thursday, February 22, 2018
in Networked Physics
Tags: physics, networking, vr

Why can't I send UDP packets from a browser?

A solution for enabling UDP in the web

Posted by Glenn Fiedler on Sunday, February 26, 2017
in White Papers
Tags: networking

Client Server Connection

How to create a client/server connection over UDP

Posted by Glenn Fiedler on Wednesday, September 28, 2016
in Building A Game Network Protocol
Tags: networking

Reliable Ordered Messages

How to implement reliable-ordered messages on top of UDP

Posted by Glenn Fiedler on Thursday, September 15, 2016
in Building A Game Network Protocol
Tags: networking

Sending Large Blocks of Data

How to send blocks quickly and reliably over UDP

Posted by Glenn Fiedler on Monday, September 12, 2016
in Building A Game Network Protocol
Tags: networking

Packet Fragmentation and Reassembly

How to send and receive packets larger than MTU

Posted by Glenn Fiedler on Tuesday, September 6, 2016
in Building A Game Network Protocol
Tags: networking

Serialization Strategies

Smart tricks that unify packet read and write

Posted by Glenn Fiedler on Sunday, September 4, 2016
in Building A Game Network Protocol
Tags: networking

Reading and Writing Packets

Best practices for reading and writing packets

Posted by Glenn Fiedler on Thursday, September 1, 2016
in Building A Game Network Protocol
Tags: networking

State Synchronization

Keeping simulations in sync by sending state

Posted by Glenn Fiedler on Monday, January 5, 2015
in Networked Physics
Tags: physics, networking

Snapshot Compression

Advanced techniques for optimizing bandwidth

Posted by Glenn Fiedler on Sunday, January 4, 2015
in Networked Physics
Tags: physics, networking

Snapshot Interpolation

Interpolating between snapshots of visual state

Posted by Glenn Fiedler on Sunday, November 30, 2014
in Networked Physics
Tags: physics, networking

Deterministic Lockstep

Keeping simulations in sync by sending only inputs

Posted by Glenn Fiedler on Saturday, November 29, 2014
in Networked Physics
Tags: physics, networking

Introduction to Networked Physics

Three ways to network a physics simulation

Posted by Glenn Fiedler on Friday, November 28, 2014
in Networked Physics
Tags: physics, networking

Collision Response and Coulomb Friction

Making a go stone bounce and spin realistically

Posted by Glenn Fiedler on Sunday, February 24, 2013
in Virtual Go
Tags: physics, go/baduk/weiqi

Rotation & Inertia Tensors

Accurately modelling the wobble of a go stone

Posted by Glenn Fiedler on Saturday, February 23, 2013
in Virtual Go
Tags: physics, go/baduk/weiqi

Go Stone vs. Go Board

Collision detection between stones and the board

Posted by Glenn Fiedler on Friday, February 22, 2013
in Virtual Go
Tags: physics, go/baduk/weiqi

How The Go Stone Moves

Simulating the motion of go stones as rigid bodies

Posted by Glenn Fiedler on Thursday, February 21, 2013
in Virtual Go
Tags: physics, go/baduk/weiqi

Tessellating The Go Stone

Generating a triangle mesh for the go stone

Posted by Glenn Fiedler on Wednesday, February 20, 2013
in Virtual Go
Tags: physics, go/baduk/weiqi

Shape of The Go Stone

Modelling the shape of a biconvex go stone

Posted by Glenn Fiedler on Tuesday, February 19, 2013
in Virtual Go
Tags: physics, go/baduk/weiqi

Introduction to Virtual Go

My project to simulate a go board and stones

Posted by Glenn Fiedler on Monday, February 18, 2013
in Virtual Go
Tags: physics, go/baduk/weiqi

Floating Point Determinism

Is it possible to make floating point calculations completely deterministic?

Posted by Glenn Fiedler on Wednesday, February 24, 2010
in Game Networking
Tags: networking

What Every Programmer Needs To Know About Game Networking

A short history of game networking techniques

Posted by Glenn Fiedler on Wednesday, February 24, 2010
in Game Networking
Tags: networking

Reliability and Congestion Avoidance over UDP

How to implement reliability and congestion avoidance in a completely different way to TCP

Posted by Glenn Fiedler on Monday, October 20, 2008
in Game Networking
Tags: networking

Virtual Connection over UDP

How to create a virtual connection over connectionless UDP

Posted by Glenn Fiedler on Wednesday, October 8, 2008
in Game Networking
Tags: networking

Sending and Receiving Packets

How to send and receive packets over UDP with BSD sockets

Posted by Glenn Fiedler on Friday, October 3, 2008
in Game Networking
Tags: networking

UDP vs. TCP

Which protocol is best for games?

Posted by Glenn Fiedler on Wednesday, October 1, 2008
in Game Networking
Tags: networking

Networked Physics (2004)

How to network a physics simulation

Posted by Glenn Fiedler on Saturday, September 4, 2004
in Game Physics
Tags: physics, networking

Spring Physics

How to simulate springs and dampers

Posted by Glenn Fiedler on Friday, September 3, 2004
in Game Physics
Tags: physics

Physics in 3D

How to simulate the motion of rigid bodies

Posted by Glenn Fiedler on Thursday, September 2, 2004
in Game Physics
Tags: physics

Fix Your Timestep!

How to step your physics simulation forward

Posted by Glenn Fiedler on Thursday, June 10, 2004
in Game Physics
Tags: physics

Integration Basics

How to integrate the equations of motion

Posted by Glenn Fiedler on Tuesday, June 1, 2004
in Game Physics
Tags: physics