Transformation Displace (circular): request more controls

Moderator: jsachs

Post Reply
pierrelabreche
Posts: 414
Joined: January 29th, 2019, 11:47 pm
What is the make/model of your primary camera?: Nikon Z8

Transformation Displace (circular): request more controls

Post by pierrelabreche »

Would it be possible to:
  • have a user-defined rotation center
  • identify the rotation center (origin) using a crosshair or other means?
  • show a rotation control circle, as an overlay?
  • label the center 0 and the arc-defining points 1 and 2 to enable zooming on those points using keyboard shortcuts.
  • identify two points on this circle (1) "from" and (2) "to" to define the rotation angle ? The rotation would be shown as a directed edge along the circle: a circular arc between the pair of distinct points #1 and #2, with an arrow pointing at #2.
Thanks
Robert Schleif
Posts: 340
Joined: May 1st, 2009, 8:28 pm

Re: Transformation Displace (circular): request more controls

Post by Robert Schleif »

The above-mentioned additions would make this transformation much more useful to me. If they are implemented, changing the name to "turn" would increase the transformation's visibility (Displacement implies translation and not so much or not at all rotation.)
jsachs
Posts: 4203
Joined: January 22nd, 2009, 11:03 pm

Re: Transformation Displace (circular): request more controls

Post by jsachs »

I'm not sure why you would want these features, rather than using the Level transformation, unless you are creating special effects and using a mask to control the rotation angle. If you rotate off-center you are likely to lose some slices of the image as they rotate out of bounds, unless you then add a border, at which point this has become a rather different transformation. You can also get this effect currently by using the Composite transformation, placing a rotated image over a background image (using 2-point (shift/rotate) alignment.
Jonathan Sachs
Digital Light & Color
Post Reply