Leap Motion - Revision history

Cchem: 1 revision

2017-12-11T04:50:14Z

1 revision

Speleo3: Anaconda

2017-12-06T13:29:39Z

Anaconda

Pyadmin: 1 revision

2014-03-28T01:47:13Z

1 revision

Speleo3: created

2013-07-30T16:04:33Z

created

New page

This page describes how to get the [https://www.leapmotion.com Leap Motion Controller] working in PyMOL, using the Leap Python API. The script was tested on Gentoo Linux and OSX.

== Experienced Issues on OSX ==

* must use /usr/bin/python2.7, the macports or fink python does not work
* must use GLUT framework, macports or fink X11 glut will not work
* the GLUT framework will change the current directory on startup
* no Tk (external window)

=== Compiling and Running PyMOL on OSX ===

In SVN rev 4037 there was a --osx-frameworks argument added to use OpenGL and GLUT frameworks. See also [[Linux Install]].

<syntaxhighlight lang="bash">
/usr/bin/python2.7 setup.py build install \
--prefix=/tmp/pymol-for-leapmotion \
--osx-frameworks
</syntaxhighlight>

Run PyMOL without the external GUI and provide absolute paths for arguments:

<syntaxhighlight lang="bash">
/tmp/pymol-for-leapmotion/bin/pymol -xqr $PWD/LeapExampleScript.py
</syntaxhighlight>

== Example Script ==

The script below demostrates proof-of-concept by implementing camera rotation and zooming with multiple fingers. It's not supposed to provide real production functionality.

<syntaxhighlight lang="python">
'''
Minimal example for PyMOL + LEAP Motion

(c) 2013 Schrödinger, Inc.

License: BSD-2-Clause
'''

import sys
import math
from pymol import cmd

if sys.platform.startswith('linux'):
sys.path.append('/usr/share/Leap/LeapSDK/lib')
sys.path.append('/usr/share/Leap/LeapSDK/lib/x64')
else:
# TODO: ADJUST THIS
sys.path.append('/path/to/LeapSDK/lib')

import Leap
from Leap import Matrix, Vector

class PymolListener(Leap.Listener):
def __init__(self, *args, **kwargs):
super(PymolListener, self).__init__(*args, **kwargs)

self.prev_frame = None

self.controller = Leap.Controller()
self.controller.add_listener(self)

def __del__(self):
self.controller.remove_listener(self)

super(PymolListener, self).__del__()

def update_view(self, frame):
if not self.prev_frame:
return

view = list(cmd.get_view())

if frame.rotation_probability(self.prev_frame) > 0.1:
m = frame.rotation_matrix(self.prev_frame)
m *= Matrix(Vector(*view[0:3]),
Vector(*view[3:6]),
Vector(*view[6:9]))
view[:9] = m.to_array_3x3()

if frame.scale_probability(self.prev_frame) > 0.1:
s = frame.scale_factor(self.prev_frame)
delta_z = math.log(s) * 100.0
view[11] += delta_z
view[15] -= delta_z
view[16] -= delta_z

cmd.set_view(view)

def on_frame(self, controller):
frame = controller.frame()

self.update_view(frame)

self.prev_frame = frame

listener = PymolListener()
</syntaxhighlight>

== See Also ==

* https://www.leapmotion.com
* http://www.mail-archive.com/pymol-users@lists.sourceforge.net/msg11572.html

← Older revision	Revision as of 04:50, 11 December 2017
(No difference)

@@ Line 1: / Line 1: @@
-This page describes how to get the [https://www.leapmotion.com Leap Motion Controller] working in PyMOL, using the Leap Python API. The script was tested on Gentoo Linux and OSX.
+This page describes how to get the [https://www.leapmotion.com Leap Motion Controller] working in PyMOL, using the Leap Python API.
-== Experienced Issues on OSX ==
+== Using PyMOL 2.0 (Anaconda Python) ==
 * must use /usr/bin/python2.7, the macports or fink python does not work

← Older revision	Revision as of 01:47, 28 March 2014
(No difference)