1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 // MARKER(update_precomp.py): autogen include statement, do not remove 25 #include "precompiled_slideshow.hxx" 26 27 #include <canvas/debug.hxx> 28 #include <basegfx/matrix/b2dhommatrix.hxx> 29 #include <basegfx/point/b2dpoint.hxx> 30 #include <basegfx/numeric/ftools.hxx> 31 #include <basegfx/matrix/b2dhommatrixtools.hxx> 32 #include "waterfallwipe.hxx" 33 #include "transitiontools.hxx" 34 35 36 namespace slideshow { 37 namespace internal { 38 39 WaterfallWipe::WaterfallWipe( sal_Int32 nElements, bool flipOnYAxis ) 40 : m_flipOnYAxis( flipOnYAxis ) 41 { 42 const sal_Int32 sqrtElements = static_cast<sal_Int32>( 43 sqrt( static_cast<double>(nElements) ) ); 44 const double elementEdge = (1.0 / sqrtElements); 45 m_waterfall.append( ::basegfx::B2DPoint( 0.0, -1.0 ) ); 46 for ( sal_Int32 pos = sqrtElements; pos--; ) 47 { 48 const sal_Int32 xPos = (sqrtElements - pos - 1); 49 const double yPos = ::basegfx::pruneScaleValue( ((pos + 1) * elementEdge) - 1.0 ); 50 m_waterfall.append( ::basegfx::B2DPoint( 51 ::basegfx::pruneScaleValue( xPos * elementEdge ), 52 yPos ) ); 53 m_waterfall.append( ::basegfx::B2DPoint( 54 ::basegfx::pruneScaleValue( (xPos + 1) * elementEdge ), 55 yPos ) ); 56 } 57 m_waterfall.append( ::basegfx::B2DPoint( 1.0, -1.0 ) ); 58 m_waterfall.setClosed(true); 59 } 60 61 ::basegfx::B2DPolyPolygon WaterfallWipe::operator () ( double t ) 62 { 63 ::basegfx::B2DPolygon poly( m_waterfall ); 64 poly.transform(basegfx::tools::createTranslateB2DHomMatrix(0.0, ::basegfx::pruneScaleValue(2.0 * t))); 65 poly.setB2DPoint( 0, ::basegfx::B2DPoint( 0.0, -1.0 ) ); 66 poly.setB2DPoint( poly.count()-1, ::basegfx::B2DPoint( 1.0, -1.0 ) ); 67 68 return m_flipOnYAxis ? flipOnYAxis( ::basegfx::B2DPolyPolygon(poly) ) 69 : ::basegfx::B2DPolyPolygon(poly); 70 } 71 72 } 73 } 74