Rotations & Coordinate System¶

For pysg a right handed coordinate system is used. The x-axis is facing right, the y-axis up, and the z-axis to the front. The pysg library uses ModernGL to render all 3D objects in the scene. The camera inside a scene is facing towards the -z direction.

For the pysg scene graph all rotations are internally represented as quaternions. If the rotation of an object is set via Euler angles they are converted to quaternions. For the Euler angles the rotation order is YZX.