Transform Controls Rotation Snapping

Questions
1

In the transform controls example it seems to suggest that if I hold Ctrl there will be snapping.

case 17: // Ctrl
control.setTranslationSnap( 100 );
control.setRotationSnap( Math.degToRad( 15 ) );

This works for the linear movement but not for rotations. Can anyone confirm if I am missing something and how you achieve rotation snapping?

2

It’s possible that it’s not actually implemented for rotation, and only translation. Being an example, the best thing to do is study it, and then extend it.

1 Like
3

I thought it seemed strange that whoever made the example would put in code that isn’t implemented, so as suggested I have tried to follow it through and it does seem that it should be doing something:

if ( space === 'local' && this.mode === 'rotate' ) {
var snap = this.rotationSnap;
     if ( this.axis === 'X' && snap ) this.object.rotation.x = Math.round( this.object.rotation.x / snap ) * snap;
     if ( this.axis === 'Y' && snap ) this.object.rotation.y = Math.round( this.object.rotation.y / snap ) * snap;
     if ( this.axis === 'Z' && snap ) this.object.rotation.z = Math.round( this.object.rotation.z / snap ) * snap;
}

I sort of think I must be missing something!? If anyone has some suggestions I would very much appreciate it

4

I found that this is actually implemented, but the rotationSnap is in radians, not degrees. Applying any value above 2*PI will prevent you from rotating at all. That was my initial mistake.