Vectors

Graphics and GPU Programming Programming

Started by ECKILLER June 17, 2000 10:49 PM

2 comments, last by ECKILLER 23 years, 10 months ago

ECKILLER

122

Author

June 17, 2000 10:49 PM

Hi, How do you calculate the direction of a vector in 3 dimensions? ECKILLER

ECKILLER

emfb

122

June 17, 2000 11:23 PM

A 3D Vector is the direction and magnitude. You need to restate your question with more information on what you are trying to do.

Try this site for more information on vectors:

Vectors

"You know you're obsessed with computer graphics when you're outside and you look up at the trees and think, "Wow! That's spectacular resolution!""

126

June 18, 2000 03:42 AM

Do you mean the angles/sphere coords?

Because
x = r*cos(u)*sin(v)
y = r*sin(u)*sin(v)
z = r*cos(v)

you get

r = sqrt(x^2 + y^2 + z^2)

u = arctan(y/x)

v = arctan(z/sqrt(x^2+y^2))

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GA

Visit our homepage: www.rarebyte.de.stGA

ECKILLER

122

Author

June 18, 2000 01:36 PM

Thanks ga, i thumbed through a calculus book to see the differant methods to describe its direction and yes spherical coords is the way i wanted.

ECKILLER

ECKILLER