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- # ***** BEGIN LICENSE BLOCK *****
- # Version: MPL 1.1/GPL 2.0/LGPL 2.1
- #
- # The contents of this file are subject to the Mozilla Public License Version
- # 1.1 (the "License"); you may not use this file except in compliance with
- # the License. You may obtain a copy of the License at
- # http://www.mozilla.org/MPL/
- #
- # Software distributed under the License is distributed on an "AS IS" basis,
- # WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- # for the specific language governing rights and limitations under the
- # License.
- #
- # The Original Code is the Python Computer Graphics Kit.
- #
- # The Initial Developer of the Original Code is Matthias Baas.
- # Portions created by the Initial Developer are Copyright (C) 2004
- # the Initial Developer. All Rights Reserved.
- #
- # Contributor(s):
- #
- # Alternatively, the contents of this file may be used under the terms of
- # either the GNU General Public License Version 2 or later (the "GPL"), or
- # the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- # in which case the provisions of the GPL or the LGPL are applicable instead
- # of those above. If you wish to allow use of your version of this file only
- # under the terms of either the GPL or the LGPL, and not to allow others to
- # use your version of this file under the terms of the MPL, indicate your
- # decision by deleting the provisions above and replace them with the notice
- # and other provisions required by the GPL or the LGPL. If you do not delete
- # the provisions above, a recipient may use your version of this file under
- # the terms of any one of the MPL, the GPL or the LGPL.
- #
- # ***** END LICENSE BLOCK *****
- # $Id: lookat.py,v 1.2 2005/07/21 15:07:11 mbaas Exp $
-
- ## \file lookat.py
- ## Contains the LookAt component.
-
- """This module contains the LookAt component which has a position
- slot (pos) and a target slot (target) which are both of type vec3.
- The output (output) is a mat3 that contains a rotation so that when positioned
- at pos the z axis points to target."""
-
- from component import createFunctionComponent
- from cgtypes import *
- from sl import radians
- import scene
-
- def _lookat(pos=vec3(0), target=vec3(0), up=vec3(0,0,1), roll=0.0):
- try:
- M = mat4().lookAt(pos, target, up)
- except:
- M = mat4(1)
-
- return M.getMat3()*mat3().rotation(radians(roll), vec3(0,0,1))
-
- LookAt = createFunctionComponent(_lookat) # "mat3 (vec3 pos, vec3 target, vec3 up, double roll)")
-