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(http://freestyle.sourceforge.net/doc/html/index.html) has been
incorporated into the Blender/Freestyle Python API implementation
in the form of Sphinx-based embedded docstrings. Some C++-specific
descriptions of classes and functions were revised so that they are
suitable for Python programmers. Missing docstrings were filled,
and sparse descriptions were extended. By means of the new
documentation system for Blender, an up-to-date Freestyle Python
API reference will be part of the Blender 2.5 documentation.
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in the definitions of Python wrappers.
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end of a file.
* Fixed compiler warnings due to an invalid argument to PyList_New().
NULL was used instead of 0 to create an empty list.
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types: Interface0D, SVertex, ViewVertex, StrokeVertex, NonTVertex,
and TVertex.
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Removed all castToSomething() methods from Interface0D's subclasses.
These methods are useless, because introspection-based automatic type
conversion takes place whenever it is applicable.
If you need to rewrite old style modules that rely on the cast methods,
apply the following rewriting rules:
- SVertex.castToSVertex()
- TVertex.castToViewVertex()
- TVertex.castToTVertex()
- NonTVertex.castToViewVertex()
- NonTVertex.castToNonTVertex()
These 5 methods return an object itself, so just removing a method
call will suffice. If you need to handle objects in a different way
depending on their types, then you can use Python's type checking
idioms such as "type(obj) is T" and "isinstance(obj, T)". Example:
[Original]
v = it.getObject()
# try to convert v into a TVertex object
vertex = v.castToTVertex()
if vertex != None:
... # do something on the TVertex object
# try to convert v into a NonTVertex object
vertex = v.castToNonTVertex()
if vertex != None:
... # do something on the NonTVertex object
[Rewritten]
vertex = it.getObject()
if type(vertex) is TVertex:
... # do something on the TVertex object
elif type(vertex) is NonTVertex:
... # do something on the NonTVertex object
- SVertex.castToViewVertex()
- SVertex.castToTVertex()
- SVertex.castToNonTVertex()
Use SVertex.viewvertex() instead. You don't need to care about
which cast method is appropriate. SVertex.viewvertex() does, if
necessary, introspection-based automatic type conversion for you.
- NonTVertex.castToSVertex()
Use NonTVertex.svertex() instead.
- CurvePoint.castToSVertex()
Let cp be a CurvePoint object, then this method can be expressed as
follows:
if cp.t2d() == 0.0:
return cp.A() # returns an SVertex
elif cp.t2d() == 1.0:
return cp.B() # returns an SVertex
return None
- CurvePoint.castToViewVertex()
- CurvePoint.castToTVertex()
- CurvePoint.castToNonVertex()
Similarly, these 3 methods can be expressed as follows:
if cp.t2d() == 0.0:
return cp.A().viewvertex()
elif cp.t2d() == 1.0:
return cp.B().viewvertex()
return None
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* Added to python/BPy_Convert.{cpp,h} 4 utility converters below for
better introspection-based automatic type conversion.
PyObject * Any_BPy_Interface0D_from_Interface0D( Interface0D& if0D );
PyObject * Any_BPy_Interface1D_from_Interface1D( Interface1D& if1D );
PyObject * Any_BPy_FEdge_from_FEdge( FEdge& fe );
PyObject * Any_BPy_ViewVertex_from_ViewVertex( ViewVertex& vv );
There are 4 corresponding converters without the "Any_" prefix. All
calls of them in the code base were replaced with these new converters
so that the introspection-based automatic conversion would take place
universally.
* python/BPy_Convert.{cpp,h}: Those C++ to Python converters having
had a "_ptr" suffix were renamed to a name without the suffix, and
their arguments were changed so as to take a reference (e.g.,
ViewVertex&) instead of a pointer (e.g., ViewVertex *). The changed
converters and their new function prototypes are listed below. These
converters now return a Python wrapper object that retains the passed
reference, instead of retaining a newly created C++ object by the
converters.
// Interface0D converters
PyObject * BPy_Interface0D_from_Interface0D( Interface0D& if0D );
PyObject * BPy_CurvePoint_from_CurvePoint( CurvePoint& cp );
PyObject * BPy_StrokeVertex_from_StrokeVertex( StrokeVertex& sv );
PyObject * BPy_SVertex_from_SVertex( SVertex& sv );
PyObject * BPy_ViewVertex_from_ViewVertex( ViewVertex& vv );
PyObject * BPy_TVertex_from_TVertex( TVertex& tv );
PyObject * BPy_NonTVertex_from_NonTVertex( NonTVertex& ntv );
// Interface1D converters
PyObject * BPy_Interface1D_from_Interface1D( Interface1D& if1D );
PyObject * BPy_Chain_from_Chain( Chain& c );
PyObject * BPy_FEdge_from_FEdge( FEdge& fe );
PyObject * BPy_FEdgeSharp_from_FEdgeSharp( FEdgeSharp& fes );
PyObject * BPy_FEdgeSmooth_from_FEdgeSmooth( FEdgeSmooth& fes );
PyObject * BPy_Stroke_from_Stroke( Stroke& s );
PyObject * BPy_ViewEdge_from_ViewEdge( ViewEdge& ve );
PyObject * BPy_directedViewEdge_from_directedViewEdge( ViewVertex::directedViewEdge& dve );
// some other converters
PyObject * BPy_ViewShape_from_ViewShape( ViewShape& vs );
PyObject * BPy_SShape_from_SShape( SShape& ss );
PyObject * BPy_FrsMaterial_from_FrsMaterial( FrsMaterial& m );
PyObject * BPy_StrokeAttribute_from_StrokeAttribute( StrokeAttribute& sa );
* Added a "borrowed" flag to the definitions of Python types being
used to wrap C++ components of Freestyle's internal data structures.
The flag indicates whether or not a Python wrapper object has a
reference to a C++ object that comprises the internal data structures.
The deallocation routines of the Python types check this flag and
release a wrapped C++ object only when it is not part of the internal
data structures. The following files were modified:
python/BPy_FrsMaterial.{cpp,h}
python/BPy_Interface0D.{cpp,h}
python/BPy_Interface1D.{cpp,h}
python/BPy_SShape.{cpp,h}
python/BPy_StrokeAttribute.{cpp,h}
python/BPy_ViewShape.{cpp,h}
python/Interface0D/BPy_CurvePoint.cpp
python/Interface0D/BPy_SVertex.cpp
python/Interface0D/BPy_ViewVertex.cpp
python/Interface0D/CurvePoint/BPy_StrokeVertex.cpp
python/Interface0D/ViewVertex/BPy_NonTVertex.cpp
python/Interface0D/ViewVertex/BPy_TVertex.cpp
python/Interface1D/BPy_FEdge.cpp
python/Interface1D/BPy_FrsCurve.cpp
python/Interface1D/BPy_Stroke.cpp
python/Interface1D/BPy_ViewEdge.cpp
python/Interface1D/Curve/BPy_Chain.cpp
python/Interface1D/FEdge/BPy_FEdgeSharp.cpp
python/Interface1D/FEdge/BPy_FEdgeSmooth.cpp
* view_map/Interface[01]D.h, python/BPy_Interface[01]D.cpp: Removed
from the Interface0D and Interface1D C++ classes a back pointer to a
Python wrapper object and all "director" calls. These classes (and
their subclasses) are used to build Freestyle's main data structures
(such as a view map and strokes) and their class hierarchy is static.
Python wrappers of these C++ classes are only used to access the data
structures from the Python layer, and not intended to extend the data
structures by subclassing the Python wrappers. Without the necessity
of subclassing in the Python layer, the back pointer to a wrapping
Python object and "director" calls would be useless (actually they
were not used at all), so they were all removed.
* python/Director.{cpp,h}: Removed the definitions of directors that
were no longer used.
* stroke/Stroke.{cpp,h}: Removed an (unused) back pointer to a Python
wrapper object.
* python/BPy_ViewMap.cpp: Fixed a possible null pointer reference.
* python/Interface1D/BPy_FEdge.cpp: Fixed parameter checking in
FEdge___init__().
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method returns a non-functional orientedViewEdgeIterator instance.
The iteration from the end to the beginning of the sequence relies
on orientedViewEdgeIterator::decrement() which is not actually
implemented in the C++ class. As a quick fix, the edgesEnd method
now raises a NotImplementedError.
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orientedViewEdgeIterator.
* Simplified Python-related error handling in C++ class definitions.
The definitions of the following C++ methods were simplified and most
code segments using the C/Python API were moved to Director.cpp.
ChainingIterator::init()
ChainingIterator::traverse()
UnaryPredicate0D::operator()()
UnaryPredicate1D::operator()()
BinaryPredicate0D::operator()()
BinaryPredicate1D::operator()()
UnaryFunction0D::operator()()
UnaryFunction1D::operator()()
StrokeShader.shade()
* Moved part of the introspection-based automatic type conversion code
from BPy_Interface0DIterator.cpp and Director.cpp to BPy_Convert.cpp
for the sake of better code organization.
* Fixed an uninitialized member in StrokeVertexIterator___init__().
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Now the following methods in the Freestyle Python API accept
not only Blender.Mathutils.Vector instances but also lists and
tuples having an appropriate number of elements.
FrsNoise::turbulence2()
FrsNoise::turbulence3()
FrsNoise::smoothNoise2()
FrsNoise::smoothNoise3()
SVertex::__init__()
SVertex::setPoint3D()
SVertex::setPoint2D()
SVertex::AddNormal()
FEdgeSharp::setNormalA()
FEdgeSharp::setNormalB()
FEdgeSmooth::setNormal()
CalligraphicShader::__init__()
StrokeAttribute::setAttributeVec2f()
StrokeAttribute::setAttributeVec3f()
StrokeAttribute::setColor()
StrokeVertex::setPoint()
* Added the following converters for the sake of the improvements
mentioned above.
Vec2f_ptr_from_PyObject()
Vec3f_ptr_from_PyObject()
Vec3r_ptr_from_PyObject()
Vec2f_ptr_from_PyList()
Vec3f_ptr_from_PyList()
Vec3r_ptr_from_PyList()
Vec2f_ptr_from_PyTuple()
Vec3f_ptr_from_PyTuple()
Vec3r_ptr_from_PyTuple()
Those converters with the suffixes _PyList and _PyTuple accept
only lists and tuples having an appropriate number of elements,
respectively, while those with the suffix _PyObject accept lists,
tuples, or Blender.Mathutils.Vector instances.
* Fixed a null pointer reference in Interface0D___dealloc__().
* Corrected the names of 3 methods in the FEdgeSmooth class.
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to a specific Python object. The conversion takes place in the following
places.
- Interface0DIterator_getObject (BPy_Interface0DIterator.cpp)
- Director_BPy_BinaryPredicate1D___call__ (Director.cpp)
- Director_BPy_UnaryPredicate1D___call__ (Director.cpp)
- SVertex_viewvertex (BPy_SVertex.cpp)
- BPy_FEdge_from_FEdge (BPy_Convert.cpp)
This is a tentative list and more conversions are expected to be added.
* Added the following two converter functions to BPy_Convert.{cpp,h}:
- BPy_NonTVertex_from_NonTVertex_ptr
- BPy_TVertex_from_TVertex_ptr
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castToViewVertex method.
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argument.
Now this method accepts 2D coordinates in the following three forms:
a) Python list of 2 real numbers: setPoint([x, y])
b) Blender Vector of 2 elements: setPoint(Vector(x, y))
c) 2 real numbers: setPoint(x, y)
[The log of Revision 19283 had a wrong message...]
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of the original styles are supported: stroke attributes are correctly taken into account, Python shaders are supported. Added SamplingShader.
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classes, except EdgeModifier and TimestampModifier (which aren't even ported via SWIG), are available under the Blender.Freestyle module. Testing of the porting will now begin to make sure the SWIG-less system works as the original.
Quite a few modifications were made to finish the API:
- Freestyle's SConscript was modified to catch all files within the intern/python directory, allowing integration of future shaders implemented in C++.
- the Operators class was ported, with a special care of making its methods static (using the METH_STATIC flag in the tp_methods method definitions)
- all of the type-checking functions [ BPy_[class name]_Check(obj) ] were changed to allow subclasses to be seen as that type too: instead on looking at the ob_type value, the PyObject_IsInstance function is used.
- all of the iterators can now retrieve the object pointed to by the operator, using the getObject() method. A directedViewEdge pair is returned as a list of the two elements in the pair.
- all of the style modules were copied to a style_modules_blender/ folder and were modified to use Freestyle as a Blender's submodule. IntegrationType and MediumType was also integrated (for example, changing MEAN to IntegrationType.MEAN).
Testing now begins. If everything works correctly, I'll move on to lib3ds removal right away.
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All Interface0D structures have been implemented
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parts of ViewVertex, SVertex and Convert to support these changes.
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header positioning problems and adapted classes accordingly
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SShape, ViewShape. Also corrected a few typos (Get#->get#).
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Interface0DIterator, CurvePointIterator, StrokeVertexIterator, SVertexIterator, orientedViewEdgeIterator.
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prefix to avoid library name collision.
Included MediumType's initialization at proper time to avoid Blender's crash.
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IMPORTANT: The setters functions' names were normalized due to constant confusion regarding capitalization. All the function names start with set... instead of Set.... This convention was changed all throughout Freestyle. To use Freestyle as an external renderer, the SWIG library MUST be regenerated.
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constants used throughout Freestyle
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passing-by-reference format. Improved the type checking for FEdge and CurvePoint. Modified FEdge C++ class to test for null vertices. Updated previous classes to support FEdge.
So far, whenever a Python object is created from its corresponding C++ object, the input object reference is copied into a new object. Due to Freestyle's functions (especially regarding the way it is iterated), it is currently impossible to deal with a pointer-based Python object. It is not a real drawback, just an aspect to keep in mind.
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migration. Stabilized a lot of the code for C++ -> Python conversion. Added the correct rich comparison operator and tested it. Corrected 'dupplicate' typo and changde to __copy__ for Python API.
From now on, when a set should be output (PySet_Type), it is given as a list (PyList_Type). The reason is that it doesn't really matter what we bring back to the Python interpreter. The set is guaranteed in memory on the C++ side.
For the CurvePoint class, the userdata variable is not yet ported (and will probably available as a list or a dictionary). The CurvePoint implementation works except for the initialization from other CurvePoints: somehow, the inner variables don't seem to be correctly handled. I do not know if it is a bug in Freestyle or if the CurvePoint object's state is correct for my test case. CurvePoint needs more testing.
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classes. The Python object type tp_new slot is now set to PyType_GenericNew, instead of the former custom functions. As a note, by default, Python does not set this slot: it is therefore mandatory for the base classes. For children classes, only __init__ is needed.
To make our base classes subclasses, the Py_TPFLAGS_BASETYPE flag was added to the object type tp_flags slot.
Finally, I began to implement CurvePoint, descendant of Interface0D. This commit allowed me to verify that my SWIG replacement method works: interfaces are well taken into account by children. For a test, use the following code:
================================
import Blender
from Blender import Freestyle
from Blender.Freestyle import *
print Interface0D()
print CurvePoint()
================================
The __repr__ method is only implemented in Interface0D:
PyObject * Interface0D___repr__(BPy_Interface0D* self)
{
return PyString_FromFormat("type: %s - address: %p", self->if0D->getExactTypeName().c_str(), self->if0D );}
and the result is of the form:
type: Interface0D - address: 0x18e5ccc0
type: CurvePoint - address: 0x18e473f0
As you can see, the correct getExactTypeName of the class is called.
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Freestyle module is added. The following modules are implemented: BinaryPredicate0D, BinaryPredicate1D, Id, Interface0D, Interface1D. I added a Convert module to help in the creation of Python objects for Freestyle's data structures. I also added a missing file for guarded_alloc needed for compilation on Windows.
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ModuleWrapper.cpp
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source/blender/freestyle/intern/python. The migration will be based on source/blender/freestyle/intern/swig/ModuleWrapper.{cpp,h}
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