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Vizard 8 » Tutorials & Examples » 3D models » Coordinate Systems » Tutorial: Transform Modes

8.1

Tutorial: Transform Modes

Key Concepts

• <node3d>.setPosition() has a parameter that allows you to position a node within a coordinate system besides the node parent's.

Explanation

Let's add a crate to the world coordinate system for the two smaller pigeon's to perch on:

The original dimensions of the crate are 1 meter on each side. After scaling it down by a factor of two and positioning it to rest the ground, it's top side is at a height is 0.5 meters. For the pigeons to perch there they will have to be near the X,Y,Z point [-1,0.5,2].

To move childPigeon to this location in world coordinates we'll use the viz.ABS_GLOBAL flag. If we don't use this flag he will be placed in mamaPigeon's coordinate system far away from the crate. Since worldPigeon is a child of the world, the flag is not necessary. Add the following code to place the pigeons on top of the crate:

Since we didn't change the orientation of childPigeon, he's still facing +Z in mamaPigeon's local coordinate system: