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10.09.2006 at 12:51PM PDT, ID: 22018189
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7.4

rotation of a vector

Asked by DJ_AM_Juicebox in Game Programming

Tags: , ,

Hi everyone,

I have a bizarre image system where for an image, I get the cosines of the upper left pixel to the world coordinate system. These values are describing the direction of the columns and rows to the world coordinate system. I guess it's like trying to describe the direction of the upper edge and left edge of a plane in 3D space.

For example, I have a sample image with cosines of:

   cols: 0/0/-1

   rows: 0/1/0

which means the columns of the image are running down the negative z axis, and the rows are running up the positive y axis.

My question is, how could I figure out the resulting cosine direction would be if I apply an arbitrary rotation to the columns for example? If I apply a 90 degree rotation around some axis, what would the cols cosine turn out to be?

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[+][-]10.09.2006 at 12:56PM PDT, ID: 17693037

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About this solution

Zone: Game Programming
Tags: rotation, vector, axis
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Solution Provided By: ozo
Participating Experts: 3
Solution Grade: A
 
 
[+][-]10.09.2006 at 01:03PM PDT, ID: 17693093

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[+][-]10.12.2006 at 12:04AM PDT, ID: 17713366

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[+][-]10.12.2006 at 12:07AM PDT, ID: 17713378

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[+][-]10.29.2006 at 04:50PM PST, ID: 17830975

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[+][-]11.07.2006 at 02:12PM PST, ID: 17893550

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