diff options
Diffstat (limited to 'basegfx/source/polygon/b2dpolygontools.cxx')
| -rw-r--r-- | basegfx/source/polygon/b2dpolygontools.cxx | 64 |
1 files changed, 41 insertions, 23 deletions
diff --git a/basegfx/source/polygon/b2dpolygontools.cxx b/basegfx/source/polygon/b2dpolygontools.cxx index ab4b84874c9d..926ff90b5aad 100644 --- a/basegfx/source/polygon/b2dpolygontools.cxx +++ b/basegfx/source/polygon/b2dpolygontools.cxx @@ -1,30 +1,21 @@ /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ -/************************************************************************* +/* + * This file is part of the LibreOffice project. * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. * - * Copyright 2000, 2010 Oracle and/or its affiliates. + * This file incorporates work covered by the following license notice: * - * OpenOffice.org - a multi-platform office productivity suite - * - * This file is part of OpenOffice.org. - * - * OpenOffice.org is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 3 - * only, as published by the Free Software Foundation. - * - * OpenOffice.org 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 Lesser General Public License version 3 for more details - * (a copy is included in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU Lesser General Public License - * version 3 along with OpenOffice.org. If not, see - * <http://www.openoffice.org/license.html> - * for a copy of the LGPLv3 License. - * - ************************************************************************/ + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ #include <basegfx/numeric/ftools.hxx> #include <basegfx/polygon/b2dpolygontools.hxx> @@ -1778,6 +1769,33 @@ namespace basegfx return aUnitCircle; } + B2DPolygon createHalfUnitCircle() + { + static B2DPolygon aUnitHalfCircle; + + if(!aUnitHalfCircle.count()) + { + const double fKappa((M_SQRT2 - 1.0) * 4.0 / 3.0); + const double fScaledKappa(fKappa * (1.0 / STEPSPERQUARTER)); + const B2DHomMatrix aRotateMatrix(createRotateB2DHomMatrix(F_PI2 / STEPSPERQUARTER)); + B2DPoint aPoint(1.0, 0.0); + B2DPoint aForward(1.0, fScaledKappa); + B2DPoint aBackward(1.0, -fScaledKappa); + + aUnitHalfCircle.append(aPoint); + + for(sal_uInt32 a(0); a < STEPSPERQUARTER * 2; a++) + { + aPoint *= aRotateMatrix; + aBackward *= aRotateMatrix; + aUnitHalfCircle.appendBezierSegment(aForward, aBackward, aPoint); + aForward *= aRotateMatrix; + } + } + + return aUnitHalfCircle; + } + B2DPolygon createPolygonFromUnitCircle(sal_uInt32 nStartQuadrant) { switch(nStartQuadrant % 4) |