c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
96 lines
2.1 KiB
C++
96 lines
2.1 KiB
C++
/* 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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