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.
98 lines
2.1 KiB
C++
98 lines
2.1 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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/** \file
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* \ingroup freestyle
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* \brief An Algorithm for Automatically Fitting Digitized Curves by Philip J. Schneider,
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* \brief from "Graphics Gems", Academic Press, 1990
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*/
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#include <vector>
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#include "Geom.h"
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#include "../system/FreestyleConfig.h"
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namespace Freestyle {
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using namespace Geometry;
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/* 2d point */
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typedef struct Point2Struct {
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double coordinates[2];
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Point2Struct()
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{
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coordinates[0] = 0;
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coordinates[1] = 0;
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}
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inline double operator[](const int i) const
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{
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return coordinates[i];
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}
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inline double &operator[](const int i)
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{
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return coordinates[i];
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}
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inline double x() const
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{
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return coordinates[0];
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}
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inline double y() const
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{
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return coordinates[1];
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}
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} Point2;
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typedef Point2 Vector2;
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class FitCurveWrapper {
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private:
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std::vector<Vector2> _vertices;
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public:
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~FitCurveWrapper();
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/** Fits a set of 2D data points to a set of Bezier Curve segments
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* data
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* Input data points
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* oCurve
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* Control points of the sets of bezier curve segments.
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* Each segment is made of 4 points (polynomial degree of curve = 3)
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* error
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* max error tolerance between resulting curve and input data
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*/
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void FitCurve(std::vector<Vec2d> &data, std::vector<Vec2d> &oCurve, double error);
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protected:
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/* Vec2d *d; Array of digitized points
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* int nPts; Number of digitized points
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* double error; User-defined error squared
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*/
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void FitCurve(Vector2 *d, int nPts, double error);
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/** Draws a Bezier curve segment
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* n
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* degree of curve (=3)
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* curve
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* bezier segments control points
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*/
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void DrawBezierCurve(int n, Vector2 *curve);
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/* Vec2d *d; Array of digitized points
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* int first, last; Indices of first and last pts in region
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* Vec2d tHat1, tHat2; Unit tangent vectors at endpoints
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* double error; User-defined error squared
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*/
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void FitCubic(Vector2 *d, int first, int last, Vector2 tHat1, Vector2 tHat2, double error);
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};
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} /* namespace Freestyle */
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