[Bf-committers] Trackpad multi-touch gestures (scroll/pinch/rotate) handling patch

Damien Plisson damien.plisson at yahoo.fr
Mon Jan 4 09:30:49 CET 2010


Le 4 janv. 2010 à 02:22, Shaul Kedem a écrit :

> Hi,
> I've patched and compiled on mac OSX 10.6, it works great!
> Can we have other axis to rotate the view when doing the circle
> gesture? it's really weird in default cam view because it is rotating
> against what seems to be the camera normal (?). but again, it's an
> excellent progress :)

Currently, the rotation is against the screen normal. Which axis would you prefer ?
This 3rd axis selection can depend upon the trackball/turntable choice in user prefs. But for this, I may need help from a math expert to make the right rotation matrix.

> another comment is that when pinching it zooms way too fast for me :)

The sensitivity is currently hardcoded in the GHOST_SystemCocoa::handleMouseEvent function. You can try other values.
I don't think it'll call for a sensitivity setting in user prefs, as an acceptable for all value should be found.

> Thanks for the new years gift :-)
> Shaul
> p.s. do you have commit rights?

Yes, but as this impacts files beyond cocoa, I want to have some feedback (including from other OSes users) before committing it.

> On Sun, Jan 3, 2010 at 12:59 PM, Damien Plisson <damien.plisson at yahoo.fr> wrote:
>> Hi all,
>> During the vacation time, I was stuck in an Internet-free place (an issue), but without a mouse (more serious issue), so to keep my Blender experience as good as possible, I needed to get these shiny trackpad multitouch features operational !
>> So, based on trackpad pan work initiated by James Deery [his mail of Nov 5th 2009], I've implemented the handling of the trackpad 2-fingers gestures :
>> - 2 fingers scroll (MOUSEPAN / GHOST_kTrackpadEventScroll event) pans the view
>> - 2 fingers pinch (MOUSEZOOM / GHOST_kTrackpadEventMagnify event) zooms the view
>> And in 3D view:
>> - alt + 2 fingers scroll rotates the view
>> - 2 fingers rotation (MOUSEROTATE / GHOST_kTrackpadEventRotate) rotates the view around the axis orthogonal to the screen (the 3rd axis !)
>> This is currently fully implemented for OSX (GHOST Cocoa fires the new events), but there must be some PC laptops with similar features that'll take advantage of this... PC users, can you confirm ? (I remember using a laptop with the 2D scroll features on its trackpad).
>> FYI, OSX implementation compiles from 10.4, though the
>> In Ghost, I've currently implemented an auto-detection of the source peripheral, so that a regular mouse still sends MOUSEWHEEL events.
>> Apple special mice behave like trackpad (not configurable from documented API), so the mighty mouse trackball sends 2D scroll events. And the magic mouse touch gestures must be like trackpad's.
>> Do you think it should be kept in "auto" mode (wheel events for regular mouse, scroll/zoom/rotate events for trackpad/special mouse), or be an option user configurable ?
>> I've posted this as patch #20555 in the patch tracker : https://projects.blender.org/tracker/index.php?func=detail&aid=20555&group_id=9&atid=127
>> for your reviews, comments & suggestions.
>> Damien
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