In general a matrix can be built such that there are 4 vectors that describe it. Doing so would require examination of the vectors to see which segments are set. However, this doesn't tell you in which axes the angle lies. A Vector would be set up with the initial orientation, and another in the intended. Rotation.mul(temp) // multiply the 2 transformation matrices together.ДЄs for the reason for Math.PI, this is because it uses radians instead of degrees, where Math.PI is equivalent to 180 degrees.ДЇinding the angle between your current orientation and your intended orientation isn't too hard - you could use Vector3fs, with the angle() method. Ie: Transform3D rotation = new Transform3D() Therefore, if you wish to perform rotations about multiple axes, then you will need to use a second Transform3D. I'm just learning Java 3D myself at the moment, and from my current knowledge, the rotation methods set the transform to a rotation about that axis only. Vector3f direction = new Vector3f(1,2,1) ДЇinal double angleX = direction.angle(new Vector3f(1,0,0)) ДЇinal double angleY = direction.angle(new Vector3f(0,1,0)) ДЇinal double angleZ = direction.angle(new Vector3f(0,0,1)) Here's an example of what I've been trying: Transform3D t3d = new Transform3D() Suppose I have the cone sitting at point (1,1,1) and I want the tip of the cone to point down an imaginary line running through (0,0,0) and (1,1,1). T3d.setTranslation(new Vector3f(0f,0f,0f) TransformGroup coneTransform = new TransformGroup(t3d) Д¬tCapability(TransformGroup.ALLOW_TRANSFORM_WRITE) I have a Cone I drew in Java 3D with the following code: Cone cone = new Cone(2f, 3f)

Opengl java 3d