| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| // MARKER(update_precomp.py): autogen include statement, do not remove |
| #include "precompiled_slideshow.hxx" |
| |
| #include <canvas/debug.hxx> |
| #include <basegfx/matrix/b2dhommatrix.hxx> |
| #include <basegfx/numeric/ftools.hxx> |
| #include <basegfx/matrix/b2dhommatrixtools.hxx> |
| #include "randomwipe.hxx" |
| #include "tools.hxx" |
| |
| |
| namespace slideshow { |
| namespace internal { |
| |
| RandomWipe::RandomWipe( sal_Int32 nElements, bool randomBars ) |
| : m_positions( new ::basegfx::B2DPoint[ nElements ] ), |
| m_nElements( nElements ), |
| m_rect( createUnitRect() ) |
| { |
| ::basegfx::B2DHomMatrix aTransform; |
| if (randomBars) |
| { |
| double edge = (1.0 / nElements); |
| for ( sal_Int32 pos = nElements; pos--; ) |
| m_positions[ pos ].setY( ::basegfx::pruneScaleValue( pos * edge ) ); |
| aTransform.scale( 1.0, ::basegfx::pruneScaleValue(edge) ); |
| } |
| else // dissolve effect |
| { |
| sal_Int32 sqrtElements = static_cast<sal_Int32>( |
| sqrt( static_cast<double>(nElements) ) ); |
| double edge = (1.0 / sqrtElements); |
| for ( sal_Int32 pos = nElements; pos--; ) { |
| m_positions[ pos ] = ::basegfx::B2DPoint( |
| ::basegfx::pruneScaleValue( (pos % sqrtElements) * edge ), |
| ::basegfx::pruneScaleValue( (pos / sqrtElements) * edge ) ); |
| } |
| const double pedge = ::basegfx::pruneScaleValue(edge); |
| aTransform.scale( pedge, pedge ); |
| } |
| m_rect.transform( aTransform ); |
| |
| // mix up: |
| for (sal_Int32 nIndex=0; nIndex<nElements; ++nIndex) |
| { |
| const sal_Int32 nOtherIndex (getRandomOrdinal(nElements)); |
| OSL_ASSERT(nOtherIndex>=0 && nOtherIndex<nElements); |
| ::std::swap(m_positions[nIndex], m_positions[nOtherIndex]); |
| } |
| } |
| |
| ::basegfx::B2DPolyPolygon RandomWipe::operator () ( double t ) |
| { |
| ::basegfx::B2DPolyPolygon res; |
| for ( sal_Int32 pos = static_cast<sal_Int32>(t * m_nElements); pos--; ) |
| { |
| ::basegfx::B2DPoint const & point = m_positions[ pos ]; |
| ::basegfx::B2DPolygon poly( m_rect ); |
| poly.transform(basegfx::tools::createTranslateB2DHomMatrix(point.getX(), point.getY())); |
| res.append( poly ); |
| } |
| return res; |
| } |
| |
| } |
| } |