1 /************************************************************************* 2 * 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * Copyright 2000, 2010 Oracle and/or its affiliates. 6 * 7 * OpenOffice.org - a multi-platform office productivity suite 8 * 9 * This file is part of OpenOffice.org. 10 * 11 * OpenOffice.org is free software: you can redistribute it and/or modify 12 * it under the terms of the GNU Lesser General Public License version 3 13 * only, as published by the Free Software Foundation. 14 * 15 * OpenOffice.org is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU Lesser General Public License version 3 for more details 19 * (a copy is included in the LICENSE file that accompanied this code). 20 * 21 * You should have received a copy of the GNU Lesser General Public License 22 * version 3 along with OpenOffice.org. If not, see 23 * <http://www.openoffice.org/license.html> 24 * for a copy of the LGPLv3 License. 25 * 26 ************************************************************************/ 27 28 // MARKER(update_precomp.py): autogen include statement, do not remove 29 #include "precompiled_slideshow.hxx" 30 31 #include <canvas/debug.hxx> 32 #include <basegfx/matrix/b2dhommatrix.hxx> 33 #include <basegfx/point/b2dpoint.hxx> 34 #include "doublediamondwipe.hxx" 35 36 37 namespace slideshow { 38 namespace internal { 39 40 ::basegfx::B2DPolyPolygon DoubleDiamondWipe::operator () ( double t ) 41 { 42 // outer: 43 const double a = ::basegfx::pruneScaleValue( 0.25 + (t * 0.75) ); 44 ::basegfx::B2DPolygon poly; 45 poly.append( ::basegfx::B2DPoint( 0.5 + a, 0.5 ) ); 46 poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - a ) ); 47 poly.append( ::basegfx::B2DPoint( 0.5 - a, 0.5 ) ); 48 poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + a ) ); 49 poly.setClosed(true); 50 ::basegfx::B2DPolyPolygon res(poly); 51 52 // inner (reverse order to clip): 53 const double b = ::basegfx::pruneScaleValue( (1.0 - t) * 0.25 ); 54 poly.clear(); 55 poly.append( ::basegfx::B2DPoint( 0.5 + b, 0.5 ) ); 56 poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + b ) ); 57 poly.append( ::basegfx::B2DPoint( 0.5 - b, 0.5 ) ); 58 poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - b ) ); 59 poly.setClosed(true); 60 res.append(poly); 61 62 return res; 63 } 64 65 } 66 } 67