Reorganized the Freestyle Python API in a hierarchical package structure.

Both C- and Python-coded API components were rearranged into logical groups.
New Python modules are packaged as follows:

freestyle - Top-level package
freestyle.types - Classes for core data structues (e.g., view map)
freestyle.chainingiterators - Pre-defined chaining iterators
freestyle.functions - Pre-defined 0D and 1D functions
freestyle.predicates - Pre-defined 0D and 1D predicates
freestyle.shaders - Pre-defined stroke shaders
freestyle.utils - Utility functions

The Python modules are installed in scripts/freestyle/modules.  Pre-defined
styles are installed in scripts/freestyle/styles.

To-do: update styles according to the new Freestyle API package structure.

1 files changed, 44 insertions, 0 deletions

diff --git a/release/scripts/freestyle/styles/anisotropic_diffusion.py b/release/scripts/freestyle/styles/anisotropic_diffusion.py
new file mode 100644
index 00000000000..274381a9a89
--- /dev/null
+++ b/release/scripts/freestyle/styles/anisotropic_diffusion.py
@@ -0,0 +1,44 @@
+# ##### BEGIN GPL LICENSE BLOCK #####
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software Foundation,
+#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+#
+# ##### END GPL LICENSE BLOCK #####
+
+#  Filename : anisotropic_diffusion.py
+#  Author   : Fredo Durand
+#  Date     : 12/08/2004
+#  Purpose  : Smoothes lines using an anisotropic diffusion scheme
+
+from freestyle import ChainPredicateIterator, ConstantThicknessShader, ExternalContourUP1D, IncreasingColorShader, \
+    Operators, QuantitativeInvisibilityUP1D, SamplingShader, Stroke, StrokeTextureShader, TrueBP1D, TrueUP1D
+from logical_operators import AndUP1D, NotUP1D
+from shaders import pyDiffusion2Shader
+
+# pyDiffusion2Shader parameters
+offset = 0.25
+nbIter = 30
+
+upred = AndUP1D(QuantitativeInvisibilityUP1D(0), ExternalContourUP1D())
+Operators.select(upred)
+bpred = TrueBP1D()
+Operators.bidirectional_chain(ChainPredicateIterator(upred, bpred), NotUP1D(upred))
+shaders_list = [
+    ConstantThicknessShader(4),
+    StrokeTextureShader("smoothAlpha.bmp", Stroke.OPAQUE_MEDIUM, False),
+    SamplingShader(2),
+    pyDiffusion2Shader(offset, nbIter),
+    IncreasingColorShader(1, 0, 0, 1, 0, 1, 0, 1),
+    ]
+Operators.create(TrueUP1D(), shaders_list)