Physics - Collision in 2 dimensions

Physics - question re: 2d collision page

From: "Matthew"
To: "Martin Baker"
Subject: question re: 2d collision page
Date: 18 June 2003 08:04

thanks for putting together one cool, informative, helpful site!

on the page
<http://www.euclideanspace.com/physics/dynamics/collision/twod/index.htm> for
the equation:

2 * ((MaMb)/(Ma+Mb) * ((VbiVai) dot n) * n

what is (VbiVai)? It cant be a dot product. You cant just multiply
two vectors afaik. Should this be (Vbi - Vai) ??

and ditto for the next equation also.

thanks, and keep up the good work!

Matthew

From: "Martin Baker"
To: "Matthew"
Subject: Re: question re: 2d collision page
Date: 18 June 2003 10:39

Matthew,

I think you are right, I have corrected the web page. Thank you very much
for pointing this out (and also for your kind comments about the site).

Martin

metadata block

see also:

Correspondence about this page

Book Shop - Further reading.

Where I can, I have put links to Amazon for books that are relevant to the subject, click on the appropriate country flag to get more details of the book or to buy it from them.

Physics Modelling for Game Programmers. This book uses DirectX and C++ and shows how to build a physics modelling framework. It includes theory about many of the maths and physics topics required to write games. The theory is kept as simple as possible, almost no calculus (a few differentials have sneaked in) and no quaternions. I think it could be potentially confusing that impulse is described as force and given the letter F. The edition I have seen has some strange printing on the collision response derivation, w is printed as ... and torque is printed as ~.

Commercial Software Shop

Where I can, I have put links to Amazon for commercial software, not directly related to the software project, but related to the subject being discussed, click on the appropriate country flag to get more details of the software or to buy it from them.

SuSE Linux 11.0. Operating system with a wide range of applications including Open Office. A good distribution for developers as it contains KDevelop. Java, Mono, etc. Can install itself as a dual-boot system with an existing Windows OS if required. For information about installing it see this page.

Can you help?

Please send me any improvements to here. I would appreciate ideas to make the pages more useful including error correction, ideas for new pages, improvements to wording. It helps if you quote the full URL of the page.

progam

I am working on a project which uses these principles, if you would like to help me with this you are welcome to join in, here:

http://sourceforge.net/projects/mjbworld/

This site may have errors. Don't use for critical systems.

metadata block

see also:	numerical approach to collisions Rotations Angular momentum Conservation of angular momentum about centre of mass of whole system
Correspondence about this page	Steve Todd Matthew
Book Shop - Further reading. Where I can, I have put links to Amazon for books that are relevant to the subject, click on the appropriate country flag to get more details of the book or to buy it from them.	Physics Modelling for Game Programmers. This book uses DirectX and C++ and shows how to build a physics modelling framework. It includes theory about many of the maths and physics topics required to write games. The theory is kept as simple as possible, almost no calculus (a few differentials have sneaked in) and no quaternions. I think it could be potentially confusing that impulse is described as force and given the letter F. The edition I have seen has some strange printing on the collision response derivation, w is printed as ... and torque is printed as ~.
Commercial Software Shop Where I can, I have put links to Amazon for commercial software, not directly related to the software project, but related to the subject being discussed, click on the appropriate country flag to get more details of the software or to buy it from them.	SuSE Linux 11.0. Operating system with a wide range of applications including Open Office. A good distribution for developers as it contains KDevelop. Java, Mono, etc. Can install itself as a dual-boot system with an existing Windows OS if required. For information about installing it see this page.
Can you help? Please send me any improvements to here. I would appreciate ideas to make the pages more useful including error correction, ideas for new pages, improvements to wording. It helps if you quote the full URL of the page.
progam I am working on a project which uses these principles, if you would like to help me with this you are welcome to join in, here:	http://sourceforge.net/projects/mjbworld/