| /************************************************************** |
| * |
| * 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/point/b2dpoint.hxx> |
| #include <basegfx/polygon/b2dpolygon.hxx> |
| #include <basegfx/matrix/b2dhommatrixtools.hxx> |
| #include "snakewipe.hxx" |
| #include "transitiontools.hxx" |
| |
| |
| namespace slideshow { |
| namespace internal { |
| |
| SnakeWipe::SnakeWipe( sal_Int32 nElements, bool diagonal, bool flipOnYAxis ) |
| : m_sqrtElements( static_cast<sal_Int32>( |
| sqrt( static_cast<double>(nElements) ) ) ), |
| m_elementEdge( 1.0 / m_sqrtElements ), |
| m_diagonal(diagonal), |
| m_flipOnYAxis(flipOnYAxis) |
| { |
| } |
| |
| ::basegfx::B2DPolyPolygon SnakeWipe::calcSnake( double t ) const |
| { |
| ::basegfx::B2DPolyPolygon res; |
| const double area = (t * m_sqrtElements * m_sqrtElements); |
| const sal_Int32 line_ = (static_cast<sal_Int32>(area) / m_sqrtElements); |
| const double line = ::basegfx::pruneScaleValue( |
| static_cast<double>(line_) / m_sqrtElements ); |
| const double col = ::basegfx::pruneScaleValue( |
| (area - (line_ * m_sqrtElements)) / m_sqrtElements ); |
| |
| if (! ::basegfx::fTools::equalZero( line )) { |
| ::basegfx::B2DPolygon poly; |
| poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); |
| poly.append( ::basegfx::B2DPoint( 0.0, line ) ); |
| poly.append( ::basegfx::B2DPoint( 1.0, line ) ); |
| poly.append( ::basegfx::B2DPoint( 1.0, 0.0 ) ); |
| poly.setClosed(true); |
| res.append(poly); |
| } |
| if (! ::basegfx::fTools::equalZero( col )) |
| { |
| double offset = 0.0; |
| if ((line_ & 1) == 1) { |
| // odd line: => right to left |
| offset = (1.0 - col); |
| } |
| ::basegfx::B2DPolygon poly; |
| poly.append( ::basegfx::B2DPoint( offset, line ) ); |
| poly.append( ::basegfx::B2DPoint( offset, |
| line + m_elementEdge ) ); |
| poly.append( ::basegfx::B2DPoint( offset + col, |
| line + m_elementEdge ) ); |
| poly.append( ::basegfx::B2DPoint( offset + col, line ) ); |
| poly.setClosed(true); |
| res.append(poly); |
| } |
| |
| return res; |
| } |
| |
| ::basegfx::B2DPolyPolygon SnakeWipe::calcHalfDiagonalSnake( |
| double t, bool in ) const |
| { |
| ::basegfx::B2DPolyPolygon res; |
| |
| if (in) { |
| const double sqrtArea2 = sqrt( t * m_sqrtElements * m_sqrtElements ); |
| const double edge = ::basegfx::pruneScaleValue( |
| static_cast<double>( static_cast<sal_Int32>(sqrtArea2) ) / |
| m_sqrtElements ); |
| |
| ::basegfx::B2DPolygon poly; |
| if (! ::basegfx::fTools::equalZero( edge )) { |
| poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); |
| poly.append( ::basegfx::B2DPoint( 0.0, edge ) ); |
| poly.append( ::basegfx::B2DPoint( edge, 0.0 ) ); |
| poly.setClosed(true); |
| res.append(poly); |
| } |
| const double a = (M_SQRT1_2 / m_sqrtElements); |
| const double d = (sqrtArea2 - static_cast<sal_Int32>(sqrtArea2)); |
| const double len = (t * M_SQRT2 * d); |
| const double height = ::basegfx::pruneScaleValue( M_SQRT1_2 / m_sqrtElements ); |
| poly.clear(); |
| poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); |
| poly.append( ::basegfx::B2DPoint( 0.0, height ) ); |
| poly.append( ::basegfx::B2DPoint( len + a, height ) ); |
| poly.append( ::basegfx::B2DPoint( len + a, 0.0 ) ); |
| poly.setClosed(true); |
| ::basegfx::B2DHomMatrix aTransform; |
| |
| if ((static_cast<sal_Int32>(sqrtArea2) & 1) == 1) |
| { |
| // odd line |
| aTransform = basegfx::tools::createRotateB2DHomMatrix(M_PI_2 + M_PI_4); |
| aTransform.translate(edge + m_elementEdge, 0.0); |
| } |
| else |
| { |
| aTransform = basegfx::tools::createTranslateB2DHomMatrix(-a, 0.0); |
| aTransform.rotate( -M_PI_4 ); |
| aTransform.translate( 0.0, edge ); |
| } |
| |
| poly.transform( aTransform ); |
| res.append(poly); |
| } |
| else // out |
| { |
| const double sqrtArea2 = sqrt( t * m_sqrtElements * m_sqrtElements ); |
| const double edge = ::basegfx::pruneScaleValue( |
| static_cast<double>( static_cast<sal_Int32>(sqrtArea2) ) / |
| m_sqrtElements ); |
| |
| ::basegfx::B2DPolygon poly; |
| if (! ::basegfx::fTools::equalZero( edge )) { |
| poly.append( ::basegfx::B2DPoint( 0.0, 1.0 ) ); |
| poly.append( ::basegfx::B2DPoint( edge, 1.0 ) ); |
| poly.append( ::basegfx::B2DPoint( 1.0, edge ) ); |
| poly.append( ::basegfx::B2DPoint( 1.0, 0.0 ) ); |
| poly.setClosed(true); |
| res.append(poly); |
| } |
| const double a = (M_SQRT1_2 / m_sqrtElements); |
| const double d = (sqrtArea2 - static_cast<sal_Int32>(sqrtArea2)); |
| const double len = ((1.0 - t) * M_SQRT2 * d); |
| const double height = ::basegfx::pruneScaleValue( M_SQRT1_2 / m_sqrtElements ); |
| poly.clear(); |
| poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) ); |
| poly.append( ::basegfx::B2DPoint( 0.0, height ) ); |
| poly.append( ::basegfx::B2DPoint( len + a, height ) ); |
| poly.append( ::basegfx::B2DPoint( len + a, 0.0 ) ); |
| poly.setClosed(true); |
| ::basegfx::B2DHomMatrix aTransform; |
| |
| if ((static_cast<sal_Int32>(sqrtArea2) & 1) == 1) |
| { |
| // odd line |
| aTransform = basegfx::tools::createTranslateB2DHomMatrix(0.0, -height); |
| aTransform.rotate( M_PI_2 + M_PI_4 ); |
| aTransform.translate( 1.0, edge ); |
| } |
| else |
| { |
| aTransform = basegfx::tools::createRotateB2DHomMatrix(-M_PI_4); |
| aTransform.translate( edge, 1.0 ); |
| } |
| poly.transform( aTransform ); |
| res.append(poly); |
| } |
| |
| return res; |
| } |
| |
| ::basegfx::B2DPolyPolygon SnakeWipe::operator () ( double t ) |
| { |
| ::basegfx::B2DPolyPolygon res; |
| if (m_diagonal) |
| { |
| if (t >= 0.5) { |
| res.append( calcHalfDiagonalSnake( 1.0, true ) ); |
| res.append( calcHalfDiagonalSnake( 2.0 * (t - 0.5), false ) ); |
| } |
| else |
| res.append( calcHalfDiagonalSnake( 2.0 * t, true ) ); |
| } |
| else |
| res = calcSnake(t); |
| |
| return m_flipOnYAxis ? flipOnYAxis(res) : res; |
| } |
| |
| ::basegfx::B2DPolyPolygon ParallelSnakesWipe::operator () ( double t ) |
| { |
| ::basegfx::B2DPolyPolygon res; |
| if (m_diagonal) |
| { |
| OSL_ASSERT( m_opposite ); |
| ::basegfx::B2DPolyPolygon half( |
| calcHalfDiagonalSnake( t, false /* out */ ) ); |
| // flip on x axis and rotate 90 degrees: |
| basegfx::B2DHomMatrix aTransform(basegfx::tools::createScaleB2DHomMatrix(1.0, -1.0)); |
| aTransform.translate( -0.5, 0.5 ); |
| aTransform.rotate( M_PI_2 ); |
| aTransform.translate( 0.5, 0.5 ); |
| half.transform( aTransform ); |
| half.flip(); |
| res.append( half ); |
| |
| // rotate 180 degrees: |
| aTransform = basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5); |
| aTransform.rotate( M_PI ); |
| aTransform.translate( 0.5, 0.5 ); |
| half.transform( aTransform ); |
| res.append( half ); |
| } |
| else |
| { |
| ::basegfx::B2DPolyPolygon half( calcSnake( t / 2.0 ) ); |
| // rotate 90 degrees: |
| basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(-0.5, -0.5)); |
| aTransform.rotate( M_PI_2 ); |
| aTransform.translate( 0.5, 0.5 ); |
| half.transform( aTransform ); |
| res.append( flipOnYAxis(half) ); |
| res.append( m_opposite ? flipOnXAxis(half) : half ); |
| } |
| |
| return m_flipOnYAxis ? flipOnYAxis(res) : res; |
| } |
| |
| } |
| } |
