[SOLVED] Direction vector from Quaternion

Help & Support
1

How would I get a unit direction vector from a Quaternion representing an orientation?

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2

Try something like:

var Quat = pc.createScript('quat');

// initialize code called once per entity
Quat.prototype.initialize = function() {
    this.dir = new pc.Vec3();
    this.end = new pc.Vec3();
    this.red = new pc.Color(1, 0, 0);
};

// update code called every frame
Quat.prototype.update = function(dt) {
    // Rotate 0, 0, 1 to match rotation of entity. Note you could use 
    // any other axis here...
    var q = this.entity.getRotation();
    q.transformVector(pc.Vec3.BACK, this.dir);

    // Draw the vector
    var start = this.entity.getPosition();
    this.end.add2(start, this.dir);
    this.app.renderLine(start, this.end, this.red);
};
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3

Exactly what I needed. Ended up using pc.Vec3.FORWARD. Thank you.

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