Re: [Scripting] XSIMath Question

["Aloys Baillet" <aloys.baillet(at)gmail.com>]

Hi Brad,

Let's give some pretty names to you objects:-)
A, B and C are the SITransformation of the objects 1, 2 and 3, T is you final SITransformation object.
My proposal is:

var vA = XSIMath.CreateVector3
();
A.GetTranslation(vA);
var vB = XSIMath.CreateVector3();
B.GetTranslation(vB;
var vC = XSIMath.CreateVector3();
C.GetTranslation(vC);

var vX = XSIMath.CreateVector3();
vX.Sub(vB, vA);
vX.NormalizeInPlace();
var vY = XSIMath.CreateVector3();
vY.Sub(vC, vA);
vY.NormalizeInPlace();
var vZ = XSIMath.CreateVector3();
vZ.Cross(vX, vY);

var oRot = XSIMath.CreateRotation();
oRot.SetFromXYZAxes(vX, vY, vZ);

T.SetTranslation(vA);
T.SetRotation(oRot);


It's NOT tested!!!

Cheers,

Aloys

On 6/1/06, brad < brad(at)cg-soup.com> wrote:

Let's say I have 3 global position coordinates and I need to convert them into a single Global SITransform Object.
The first point will be the location of the transform, the second point will be the direction my x-axis points at, and the third point will be the direction my y-axis points at.

What is the quickest and easiest way to calculate this using existing XSIMath Objects?

-Brad
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-- 
Aloys Baillet - XSI Technical Director
Character Dpt - Animal Logic
--