e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
314 lines
9.2 KiB
Python
314 lines
9.2 KiB
Python
# SPDX-FileCopyrightText: 2014-2023 Blender Authors
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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"""
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This module contains functions operating on vertices (0D elements) and
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polylines (1D elements). The module is also intended to be a
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collection of examples for function definition in Python.
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User-defined functions inherit one of the following base classes,
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depending on the object type (0D or 1D) to operate on and the return
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value type:
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- :class:`freestyle.types.UnaryFunction0DDouble`
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- :class:`freestyle.types.UnaryFunction0DEdgeNature`
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- :class:`freestyle.types.UnaryFunction0DFloat`
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- :class:`freestyle.types.UnaryFunction0DId`
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- :class:`freestyle.types.UnaryFunction0DMaterial`
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- :class:`freestyle.types.UnaryFunction0DUnsigned`
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- :class:`freestyle.types.UnaryFunction0DVec2f`
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- :class:`freestyle.types.UnaryFunction0DVec3f`
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- :class:`freestyle.types.UnaryFunction0DVectorViewShape`
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- :class:`freestyle.types.UnaryFunction0DViewShape`
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- :class:`freestyle.types.UnaryFunction1DDouble`
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- :class:`freestyle.types.UnaryFunction1DEdgeNature`
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- :class:`freestyle.types.UnaryFunction1DFloat`
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- :class:`freestyle.types.UnaryFunction1DUnsigned`
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- :class:`freestyle.types.UnaryFunction1DVec2f`
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- :class:`freestyle.types.UnaryFunction1DVec3f`
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- :class:`freestyle.types.UnaryFunction1DVectorViewShape`
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- :class:`freestyle.types.UnaryFunction1DVoid`
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"""
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__all__ = (
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"ChainingTimeStampF1D",
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"Curvature2DAngleF0D",
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"Curvature2DAngleF1D",
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"CurveMaterialF0D",
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"CurveNatureF0D",
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"CurveNatureF1D",
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"DensityF0D",
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"DensityF1D",
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"GetCompleteViewMapDensityF1D",
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"GetCurvilinearAbscissaF0D",
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"GetDirectionalViewMapDensityF1D",
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"GetOccludeeF0D",
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"GetOccludeeF1D",
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"GetOccludersF0D",
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"GetOccludersF1D",
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"GetParameterF0D",
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"GetProjectedXF0D",
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"GetProjectedXF1D",
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"GetProjectedYF0D",
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"GetProjectedYF1D",
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"GetProjectedZF0D",
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"GetProjectedZF1D",
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"GetShapeF0D",
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"GetShapeF1D",
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"GetSteerableViewMapDensityF1D",
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"GetViewMapGradientNormF0D",
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"GetViewMapGradientNormF1D",
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"GetXF0D",
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"GetXF1D",
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"GetYF0D",
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"GetYF1D",
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"GetZF0D",
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"GetZF1D",
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"IncrementChainingTimeStampF1D",
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"LocalAverageDepthF0D",
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"LocalAverageDepthF1D",
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"MaterialF0D",
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"Normal2DF0D",
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"Normal2DF1D",
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"Orientation2DF1D",
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"Orientation3DF1D",
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"QuantitativeInvisibilityF0D",
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"QuantitativeInvisibilityF1D",
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"ReadCompleteViewMapPixelF0D",
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"ReadMapPixelF0D",
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"ReadSteerableViewMapPixelF0D",
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"ShapeIdF0D",
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"TimeStampF1D",
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"VertexOrientation2DF0D",
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"VertexOrientation3DF0D",
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"ZDiscontinuityF0D",
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"ZDiscontinuityF1D",
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"pyCurvilinearLengthF0D",
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"pyDensityAnisotropyF0D",
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"pyDensityAnisotropyF1D",
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"pyGetInverseProjectedZF1D",
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"pyGetSquareInverseProjectedZF1D",
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"pyInverseCurvature2DAngleF0D",
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"pyViewMapGradientNormF0D",
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"pyViewMapGradientNormF1D",
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"pyViewMapGradientVectorF0D",
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)
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# module members
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from _freestyle import (
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ChainingTimeStampF1D,
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Curvature2DAngleF0D,
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Curvature2DAngleF1D,
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CurveNatureF0D,
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CurveNatureF1D,
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DensityF0D,
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DensityF1D,
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GetCompleteViewMapDensityF1D,
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GetCurvilinearAbscissaF0D,
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GetDirectionalViewMapDensityF1D,
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GetOccludeeF0D,
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GetOccludeeF1D,
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GetOccludersF0D,
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GetOccludersF1D,
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GetParameterF0D,
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GetProjectedXF0D,
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GetProjectedXF1D,
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GetProjectedYF0D,
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GetProjectedYF1D,
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GetProjectedZF0D,
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GetProjectedZF1D,
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GetShapeF0D,
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GetShapeF1D,
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GetSteerableViewMapDensityF1D,
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GetViewMapGradientNormF0D,
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GetViewMapGradientNormF1D,
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GetXF0D,
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GetXF1D,
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GetYF0D,
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GetYF1D,
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GetZF0D,
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GetZF1D,
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IncrementChainingTimeStampF1D,
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LocalAverageDepthF0D,
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LocalAverageDepthF1D,
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MaterialF0D,
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Normal2DF0D,
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Normal2DF1D,
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Orientation2DF1D,
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Orientation3DF1D,
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QuantitativeInvisibilityF0D,
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QuantitativeInvisibilityF1D,
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ReadCompleteViewMapPixelF0D,
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ReadMapPixelF0D,
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ReadSteerableViewMapPixelF0D,
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ShapeIdF0D,
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TimeStampF1D,
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VertexOrientation2DF0D,
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VertexOrientation3DF0D,
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ZDiscontinuityF0D,
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ZDiscontinuityF1D,
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)
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# constructs for function definition in Python
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from freestyle.types import (
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CurvePoint,
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IntegrationType,
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UnaryFunction0DDouble,
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UnaryFunction0DMaterial,
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UnaryFunction0DVec2f,
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UnaryFunction1DDouble,
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)
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from freestyle.utils import ContextFunctions as CF
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from freestyle.utils import integrate
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from mathutils import Vector
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# -- Functions for 0D elements (vertices) -- #
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class CurveMaterialF0D(UnaryFunction0DMaterial):
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"""
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A replacement of the built-in MaterialF0D for stroke creation.
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MaterialF0D does not work with Curves and Strokes. Line color
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priority is used to pick one of the two materials at material
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boundaries.
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Notes: expects instances of CurvePoint to be iterated over
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can return None if no fedge can be found
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"""
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def __call__(self, inter):
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fe = inter.object.fedge
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if fe is None:
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return None
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if fe.is_smooth:
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return fe.material
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else:
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right, left = fe.material_right, fe.material_left
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return right if (right.priority > left.priority) else left
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class pyInverseCurvature2DAngleF0D(UnaryFunction0DDouble):
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def __call__(self, inter):
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func = Curvature2DAngleF0D()
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c = func(inter)
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return (3.1415 - c)
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class pyCurvilinearLengthF0D(UnaryFunction0DDouble):
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def __call__(self, inter):
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cp = inter.object
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assert isinstance(cp, CurvePoint)
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return cp.t2d
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class pyDensityAnisotropyF0D(UnaryFunction0DDouble):
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"""Estimates the anisotropy of density."""
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def __init__(self, level):
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UnaryFunction0DDouble.__init__(self)
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self.IsoDensity = ReadCompleteViewMapPixelF0D(level)
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self.d0Density = ReadSteerableViewMapPixelF0D(0, level)
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self.d1Density = ReadSteerableViewMapPixelF0D(1, level)
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self.d2Density = ReadSteerableViewMapPixelF0D(2, level)
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self.d3Density = ReadSteerableViewMapPixelF0D(3, level)
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def __call__(self, inter):
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c_iso = self.IsoDensity(inter)
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c_0 = self.d0Density(inter)
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c_1 = self.d1Density(inter)
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c_2 = self.d2Density(inter)
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c_3 = self.d3Density(inter)
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cMax = max(max(c_0, c_1), max(c_2, c_3))
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cMin = min(min(c_0, c_1), min(c_2, c_3))
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return 0 if (c_iso == 0) else (cMax - cMin) / c_iso
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class pyViewMapGradientVectorF0D(UnaryFunction0DVec2f):
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"""
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Returns the gradient vector for a pixel.
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.. method:: __init__(self, level)
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Builds a pyViewMapGradientVectorF0D object.
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:arg level: the level at which to compute the gradient
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:type level: int
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"""
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def __init__(self, level):
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UnaryFunction0DVec2f.__init__(self)
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self._l = level
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self._step = pow(2, self._l)
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def __call__(self, iter):
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p = iter.object.point_2d
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gx = CF.read_complete_view_map_pixel(self._l, int(p.x + self._step), int(p.y)) - \
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CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y))
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gy = CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y + self._step)) - \
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CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y))
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return Vector((gx, gy))
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class pyViewMapGradientNormF0D(UnaryFunction0DDouble):
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def __init__(self, l):
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UnaryFunction0DDouble.__init__(self)
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self._l = l
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self._step = pow(2, self._l)
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def __call__(self, iter):
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p = iter.object.point_2d
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gx = CF.read_complete_view_map_pixel(self._l, int(p.x + self._step), int(p.y)) - \
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CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y))
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gy = CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y + self._step)) - \
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CF.read_complete_view_map_pixel(self._l, int(p.x), int(p.y))
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return Vector((gx, gy)).length
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# -- Functions for 1D elements (curves) -- #
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class pyGetInverseProjectedZF1D(UnaryFunction1DDouble):
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def __call__(self, inter):
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func = GetProjectedZF1D()
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z = func(inter)
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return (1.0 - z)
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class pyGetSquareInverseProjectedZF1D(UnaryFunction1DDouble):
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def __call__(self, inter):
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func = GetProjectedZF1D()
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z = func(inter)
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return (1.0 - pow(z, 2))
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class pyDensityAnisotropyF1D(UnaryFunction1DDouble):
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def __init__(self, level, integrationType=IntegrationType.MEAN, sampling=2.0):
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UnaryFunction1DDouble.__init__(self, integrationType)
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self._func = pyDensityAnisotropyF0D(level)
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self._integration = integrationType
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self._sampling = sampling
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def __call__(self, inter):
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v = integrate(
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self._func, inter.points_begin(
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self._sampling), inter.points_end(
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self._sampling), self._integration)
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return v
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class pyViewMapGradientNormF1D(UnaryFunction1DDouble):
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def __init__(self, l, integrationType, sampling=2.0):
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UnaryFunction1DDouble.__init__(self, integrationType)
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self._func = pyViewMapGradientNormF0D(l)
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self._integration = integrationType
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self._sampling = sampling
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def __call__(self, inter):
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v = integrate(
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self._func, inter.points_begin(
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self._sampling), inter.points_end(
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self._sampling), self._integration)
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return v
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