• Create Account

We need 1 more developer from Canada and 12 more from Australia to help us complete a research survey.

Support our site by taking a quick sponsored survey and win a chance at a \$50 Amazon gift card. Click here to get started!

### #ActualÁlvaro

Posted 15 October 2013 - 11:10 AM

The location of the origin of the coordinate systems is irrelevant for this particular problem, because we are converting only vectors. When you say "and it is rotated by facing directly on opposite z", you have to realize that that transformation is not a rotation at all: It's a reflection. The coordinates of v in the second coordinate system are (-0.5, 0, 1). If v is the axis of a rotation, you'll actually have to negate the rotation amount because the coordinate systems have different orientation.

### #1Álvaro

Posted 15 October 2013 - 11:09 AM

The location of the origin of the coordinate systems is irrelevant for this particular problem, because we are converting only vectors. When you say "and it is rotated by facing directly on opposite z", you have to realize that that transformation is not a rotation at all: It's a reflection. The coordinates of v in the second coordinate system are (-0.5, 0, 1). If v is the axis of a rotation, you'll actually have to negate the rotation amount because the coordinate systems have different orientation.

PARTNERS