Hi Christopher,

> It would also be great if the default nudge amount was not
> "1.0" but instead the current grid snap value.

This one should be fairly straightforward - you can retrieve the current grid snap value by: moi.grid.snapSize;

So in the place in Nudge.js where it has the nudge amount = 1.0 make it be = moi.grid.snapSize instead.


The view dependent nudge is likely to be quite a bit more complex. You can get the view frame of the current viewport by calling moi.ui.getActiveViewport().cameraFrame

That returns an IMoiCoordinateFrame which a coordinate system with an origin point, and x y z axis directions. In this case the x-axis of the frame will be in the view's direction towards the right, the y-axis will be in the view's upwards direction and the z axis of the frame will be towards the eye point.

There is another call which returns view angles - but there is not just a single view angle like you say, there is a combination of 3: view.upDownAngle , view.leftRightAngle and view.tiltAngle.

- Michael

Thanks for the tip: "moi.grid.snapSize"!

I believe all I need for what I'd like Nudge to do is
view.upDownAngle
view.leftRightAngle
view.tiltAngle
What units are these in? Degrees?

I assume that upDownAngle==0 means looking in a horizontal direction. Are positive values up or down?

Are positive values of leftRightAngle left or right?

And what is tiltAngle?

Thanks again,
Christopher

Hi Christopher,

> view.upDownAngle
> view.leftRightAngle
> view.tiltAngle
> What units are these in? Degrees?

Yes, they're in degrees.


> I assume that upDownAngle==0 means looking in a
> horizontal direction. Are positive values up or down?

An upDownAngle==0 means you are looking straight downwards, the up/down and left/right angle values are used as in a Spherical coordinate system as shown here:
http://en.wikipedia.org/wiki/Spherical_coordinate_system

upDownAngle is the angle the eye position is rotated downwards around the world xaxis, and left-right angle is the amount it swings left or right rotating around the zaxis.


> And what is tiltAngle?

tilt angle is the angle of rotation around the view vector, like the roll axis angle shown in this diagram (from Wikipedia):





> Are positive values of leftRightAngle left or right?

It should follow the right-hand rule with the orientation being the world z axis.

- Michael

Hi, I've written a 2D version.

It checks which viewport the mouse is over:
https://github.com/thetumbledtype/moi3d-scripts-commands/blob/master/Nudge2D.js