2 Add material to support overhang or remove material at the overhang angle.
6 from __future__ import absolute_import
8 from fabmetheus_utilities.geometry.creation import solid
9 from fabmetheus_utilities.geometry.geometry_utilities import evaluate
10 from fabmetheus_utilities.geometry.geometry_utilities import matrix
11 from fabmetheus_utilities.vector3 import Vector3
14 __author__ = 'Enrique Perez (perez_enrique@yahoo.com)'
15 __credits__ = 'Art of Illusion <http://www.artofillusion.org/>'
16 __date__ = '$Date: 2008/02/05 $'
17 __license__ = 'GNU Affero General Public License http://www.gnu.org/licenses/agpl.html'
20 globalExecutionOrder = 200
23 # http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=269576
24 # http://www.opengl.org/resources/code/samples/sig99/advanced99/notes/node159.html
25 # m.a00 = -2 * norm.x * norm.x + 1;
26 # m.a10 = -2 * norm.y * norm.x;
27 # m.a20 = -2 * norm.z * norm.x;
30 # m.a01 = -2 * norm.x * norm.y;
31 # m.a11 = -2 * norm.y * norm.y + 1;
32 # m.a21 = -2 * norm.z * norm.y;
35 # m.a02 = -2 * norm.x * norm.z;
36 # m.a12 = -2 * norm.y * norm.z;
37 # m.a22 = -2 * norm.z * norm.z + 1;
40 # m.a03 = -2 * norm.x * d;
41 # m.a13 = -2 * norm.y * d;
42 # m.a23 = -2 * norm.z * d;
45 # normal = unit_vector(normal[:3])
46 # M = numpy.identity(4)
47 # M[:3, :3] -= 2.0 * numpy.outer(normal, normal)
48 # M[:3, 3] = (2.0 * numpy.dot(point[:3], normal)) * normal
50 def flipPoints(elementNode, points, prefix):
52 derivation = FlipDerivation(elementNode, prefix)
54 point.setToVector3(point - 2.0 * derivation.axis.dot(point - derivation.origin) * derivation.axis)
56 def getFlippedLoop(elementNode, loop, prefix):
58 flipPoints(elementNode, loop, prefix)
59 if getShouldReverse(elementNode, prefix):
63 def getManipulatedGeometryOutput(elementNode, geometryOutput, prefix):
64 'Get equated geometryOutput.'
65 flipPoints(elementNode, matrix.getVertexes(geometryOutput), prefix)
68 def getManipulatedPaths(close, elementNode, loop, prefix, sideLength):
70 return [getFlippedLoop(elementNode, loop, prefix)]
72 def getNewDerivation(elementNode, prefix, sideLength):
74 return FlipDerivation(elementNode, prefix)
76 def getShouldReverse(elementNode, prefix):
77 'Determine if the loop should be reversed.'
78 return evaluate.getEvaluatedBoolean(True, elementNode, prefix + 'reverse')
80 def processElementNode(elementNode):
81 'Process the xml element.'
82 solid.processElementNodeByFunctionPair(elementNode, getManipulatedGeometryOutput, getManipulatedPaths)
85 class FlipDerivation(object):
86 "Class to hold flip variables."
87 def __init__(self, elementNode, prefix):
89 self.origin = evaluate.getVector3ByPrefix(Vector3(), elementNode, prefix + 'origin')
90 self.axis = evaluate.getVector3ByPrefix(Vector3(1.0, 0.0, 0.0), elementNode, prefix + 'axis').getNormalized()