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Diffstat (limited to 'source/blender/freestyle/intern/geometry/FitCurve.h')
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+//
+// Filename : FitCurve.h
+// Author(s) : Stephane Grabli
+// Purpose : An Algorithm for Automatically Fitting Digitized Curves
+// by Philip J. Schneider
+// from "Graphics Gems", Academic Press, 1990
+// Date of creation : 06/06/2003
+//
+///////////////////////////////////////////////////////////////////////////////
+
+
+//
+// Copyright (C) : Please refer to the COPYRIGHT file distributed
+// with this source distribution.
+//
+// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef FITCURVE_H
+# define FITCURVE_H
+
+#include <vector>
+#include "../system/FreestyleConfig.h"
+#include "Geom.h"
+
+using namespace Geometry;
+
+typedef struct Point2Struct { /* 2d point */
+ double coordinates[2];
+ Point2Struct() {coordinates[0]=0;coordinates[1]=0;}
+ inline double operator[](const int i) const
+ {
+ return coordinates[i];
+ }
+ inline double& operator[](const int i)
+ {
+ return coordinates[i];
+ }
+ inline double x() const {return coordinates[0];}
+ inline double y() const {return coordinates[1];}
+ } Point2;
+
+typedef Point2 Vector2;
+
+
+
+class LIB_GEOMETRY_EXPORT FitCurveWrapper
+{
+private:
+ std::vector<Vector2> _vertices;
+
+public:
+ FitCurveWrapper();
+ ~FitCurveWrapper();
+
+ /*! Fits a set of 2D data points to a set of Bezier Curve segments
+ * data
+ * Input data points
+ * oCurve
+ * Control points of the sets of bezier curve segments.
+ * Each segment is made of 4 points (polynomial degree of curve = 3)
+ * error
+ * max error tolerance between resulting curve and input data
+ */
+ void FitCurve(std::vector<Vec2d>& data, std::vector<Vec2d>& oCurve, double error);
+protected:
+ /* Vec2d *d; Array of digitized points */
+ /* int nPts; Number of digitized points */
+ /* double error; User-defined error squared */
+ void FitCurve(Vector2 *d, int nPts, double error);
+
+ /*! Draws a Bezier curve segment
+ * n
+ * degree of curve (=3)
+ * curve
+ * bezier segments control points
+ */
+ void DrawBezierCurve(int n, Vector2 *curve);
+
+ /* Vec2d *d; Array of digitized points */
+ /* int first, last; Indices of first and last pts in region */
+ /* Vec2d tHat1, tHat2; Unit tangent vectors at endpoints */
+ /* double error; User-defined error squared */
+ void FitCubic(Vector2 *d, int first, int last, Vector2 tHat1, Vector2 tHat2, double error);
+
+};
+
+#endif // FITCURVE_H