CODEWITHSUNDEEP
openglvectorgeometrykinectrotational-matrices
Alfaz Ahmed
Alfaz Ahmed

Reputation: 79

what is meant by Orientation of a 3d vector in Cartesian coordinate system?

So I am working on a project that has to obtain body joint angles with Kinect skeletal data(Microsoft SDK). I have 3d points in the camera coordinate system, I need to get the angles that one bone makes with a coordinate system fitted at the parent joint of that bone. For example, Left Knee and Left Ankle make a bone, say I fit a coordinate system at Left Knee with Z axis facing camera and Y axis going toward the preceding bone vector(i.e. Hip Center and Hip Left). How do I reach the coordinate system from the central Hip joint?

I read somewhere that I can sequentially multiply the "Orientation" of the Hip joint and then the Orientation of the Hip Left and next the orientation of the Left Knee joint to fit the coordinate where I want (i.e at the Left Knee joint).

What is meant by "Orientation" here? Is it the rotation matrix for rotating along Z axis or something else?

Upvotes: 2

Views: 1291

Answers (1)

Liam McInroy
Liam McInroy

Reputation: 4366

You should see Orientation (geometry). Essentially, it is the rotation relative to a fixed position (zero degrees rotated in every axis). reference would be the pose you must assume when calibrating using OpenNI if you choose OpenNI.

Upvotes: 1

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