Skip to main content
gamedev.net
🔒 Locked

Calculating normal vector

Started by Koen VB 0 replies 600+ views
Original Post
Koen VB
Koen VB
If I have, let's say, a rectangle, how can I calculate a vector perpendicular to it? Assume the coordinates of the corners are: -1,-1,0 1,-1,0 1,1,0 -1,1,0 So I have a square that runs parallel with the x- and y-axis. The normal vector would be 0,0,1 (or 0,0,-1 depending on what side you consider up). If I have the coordinates of the corners, how can I calculate the normal vector?
Cookie's World
private_ctor
private_ctor
You use the cross product of 2 vectors to find the normal.

Create two vectors from your rectangle using two of the edges.

http://mathworld.wolfram.com/CrossProduct.html


That will explain cross products to you.
-------------------------------Sometimes I ~self();

Topic Locked

This topic has been locked by a moderator. New replies are not allowed.

Sign in to reply to this topic.