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Diffstat (limited to 'graphics/epix/circle.h')
-rw-r--r-- | graphics/epix/circle.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/graphics/epix/circle.h b/graphics/epix/circle.h new file mode 100644 index 0000000000..5d3e80dd72 --- /dev/null +++ b/graphics/epix/circle.h @@ -0,0 +1,94 @@ +/* + * circle.h -- ePiX::Circle class + * + * This file is part of ePiX, a C++ library for creating high-quality + * figures in LaTeX + * + * Version 1.1.9 + * Last Change: July 30, 2007 + */ + +/* + * Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 + * Andrew D. Hwang <rot 13 nujnat at zngupf dot ubylpebff dot rqh> + * Department of Mathematics and Computer Science + * College of the Holy Cross + * Worcester, MA, 01610-2395, USA + */ + +/* + * ePiX 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. + * + * ePiX 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 ePiX; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * This file provides: + * + * The Circle class (center, radius, unit normal). + * + * - Circle() (defaults to origin, unit radius, in (x1,x2,0)-plane + * - Circle(ctr, pt) (parallel to (x1,x2,0)-plane, center ctr, through pt) + * - Circle(pt1, pt2, pt3) (arbitrary non-collinear points) + * - center(), radius(), perp() + * - affine operations: shift(P), move_to(P), scale(double) + * - draw() (ePiX ellipse) + */ +#ifndef EPIX_CIRCLE +#define EPIX_CIRCLE + +#include "triples.h" + +namespace ePiX { + + class Circle { + public: + // defaults to unit circle in (x1,x2,0) plane + Circle(const P& ctr=P(0,0,0), double rad=1, const P& perp=E_3); + + Circle(const P& ctr, const P& pt); // center, and point, normal = E_3 + Circle(const P& pt1, const P& pt2, const P& pt3); // three points + + Circle(bool); // malformed Circle for intersection operators + + P center() const; + double radius() const; + P perp() const; + + bool malformed() const; + + // translate + Circle& shift(const P&); + Circle& move_to(const P&); + // scale radius by c + Circle& scale(double c); + + void draw() const; + + private: + P m_center; + double m_radius; + P m_perp; // unit normal, even if rad = 0 + + bool m_malformed; + }; // end of Circle class + + // global object-drawing commands + void circle(const P& ctr=P(0,0,0), double rad=1, const P& perp=E_3); + + void circle(const P& ctr, const P& pt); // center, and point, normal = E_3 + void circle(const P& pt1, const P& pt2, const P& pt3); // three points + +} // end of namespace + +#endif /* EPIX_CIRCLE */ |