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Vector

Started by WiseElben Feb 3, 2004 at 9:04 PM 4 replies 450+ views

Original Post

Feb 3, 2004 at 9:04 PM

K, a vector is magnitude direction, right? So let''s say you want to normalize vector x, the formula would be: y = x / |x| Now, |x| is the length of vector x. So what is ''x''? If |x| is the length, then ''x'' is the direction, right? What would I plug in for x? (OpenGL Programming, pg 85. Elben

"Give a man a fish and he will eat for a day. Teach a man how to fish and he will eat for a life time." -Chinese Proverb WiseElben.com - Experience Wisdom

Oluseyi

526

Oluseyi

Feb 3, 2004 at 9:12 PM

Every vector is a combination of components composed of the three axial unit vectors i, j and k. The sum of the squares of their coefficients is 1 in a unit vector.

x = |x| * (xcoeff * i + ycoeff * j + zcoeff * k)

psykr

Feb 3, 2004 at 9:16 PM

Usually in 3D programming, a vector is represented with three variables representing it''s length in each dimension (x,y,z). Both the magnitude and direction of a vector are contained within this structure, so you don''t have to specify them explicitly.

Atheist

Feb 4, 2004 at 8:01 AM

quote:
Original post by WiseElben
So let''s say you want to normalize vector x [...]. So what is ''x''?

?!?

btw: y is the direction and the equation might (in the context of "vector is a direction with a magnitude") be clearer writing

x = y * |x|

python_regious

103

python_regious

Feb 4, 2004 at 11:07 AM

<plug>
What you probably need.
</plug>

You have to remember that you''re unique, just like everybody else.

WiseElben

Author

WiseElben

Feb 4, 2004 at 9:14 PM

Ah, this is all confusing to me. I''ll read that article, phython_, and hope I understand it.

Elben

"Give a man a fish and he will eat for a day. Teach a man how to fish and he will eat for a life time."
-Chinese Proverb
WiseElben.com - Experience Wisdom

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