Box Translation and Orientation

Summary:

Apply rotation first?

Box Translation and Orientation

Ian Mallett 04 Dec 2010 02:23

Hi,

So I need to have a Box, located at an arbitrary position, with a given orientation. Unfortunately, it seems that the translation is applied first. I need the rotation applied first. To illustrate the problem:

//Makes a box with center at {sqrt(2),sqrt(2),0}, NOT at {0,1,0}
pos = new Vector3(0,1,0)
orient = Matrix.CreateRotationZ((float)MathHelper.ToRadians(45.0));
body.MoveTo(pos,orient);

Workarounds?

Thanks,
Ian

Last edited on 04 Dec 2010 02:25 by Ian Mallett Show more

Re: Box Translation and Orientation

BlackSpiderWolf 04 Dec 2010 14:54

Wouldn't that be.

body.position =
Vector3.Transform(pos, Matrix.CreateRotationZ((float)MathHelper.ToRadians(45.0)));
?

Re: Box Translation and Orientation

Ian Mallett 04 Dec 2010 19:23

Yes, but that's the thing—I don't want it there.

If I want the block at (0,0,1), I ought to be able to pass it (0,0,1), and have the block be at (0,0,1). Instead, it is at (0,0,1)-transformed-by-the-block's-orientation—ostentatiously not at (0,0,1).