Trying to spin an object

md_cake

Snap Lens Network Member Lens Studio Team

January 27, 2018 10:17
Edited

The most I was able to do is this, but this is far from what I want. I want the item to spin around like a mario coin. Any idea on how I would do this with my script?

This was done with:

var newVal = Math.sin(getTime() * 2);

script.getSceneObject().getTransform().setLocalRotation(new quat(0, 0, 0, newVal));

Travis Chen
Snap Lens Network Member Lens Studio Team

January 29, 2018 01:45
Hey Charlie! You're on the right track.

The sin is what's causing it to go back and forth like that. So for your spinning coin you don't need it. Also, it sounds like you want to spin about the Y axis. Because quaternions are a bit hard to work with, you can convert a vec3 euler angle into a quat which then is set in the rotation. One thing to keep in mind is that our euler angles are in Radians. Here's an example of spinning about the y axis just like a spinning coin. It has a configurable spin speed in the inspector:
```
// -----JS CODE-----
// @input SceneObject spinObject
// @input float spinSpeed = 2.0 

var spinTransform = script.spinObject.getTransform();
var spinVal = getTime() * script.spinSpeed;

spinTransform.setLocalRotation( quat.quatFromEuler( 0.0, spinVal, 0.0 ) );
```
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md_cake
Snap Lens Network Member Lens Studio Team

January 29, 2018 02:06
Amazing! Thank you so much ☺
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Trying to spin an object

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