270 lines
9.6 KiB
C++
270 lines
9.6 KiB
C++
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/*************************************************************************
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*
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* $RCSfile: snakewipe.cxx,v $
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*
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* $Revision: 1.2 $
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*
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* last change: $Author: rt $ $Date: 2004-11-26 19:08:38 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2000 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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*
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************************************************************************/
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#include "canvas/debug.hxx"
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#include "snakewipe.hxx"
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#include "transitiontools.hxx"
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#include "basegfx/matrix/b2dhommatrix.hxx"
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#include "basegfx/point/b2dpoint.hxx"
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#include "basegfx/polygon/b2dpolygon.hxx"
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namespace presentation {
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namespace internal {
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SnakeWipe::SnakeWipe( sal_Int32 nElements, bool diagonal, bool flipOnYAxis )
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: m_sqrtElements( static_cast<sal_Int32>(
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sqrt( static_cast<double>(nElements) ) ) ),
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m_elementEdge( 1.0 / m_sqrtElements ),
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m_diagonal(diagonal),
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m_flipOnYAxis(flipOnYAxis)
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{
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}
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::basegfx::B2DPolyPolygon SnakeWipe::calcSnake( double t ) const
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{
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::basegfx::B2DPolyPolygon res;
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const double area = (t * m_sqrtElements * m_sqrtElements);
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const sal_Int32 line_ = (static_cast<sal_Int32>(area) / m_sqrtElements);
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const double line = ::basegfx::pruneScaleValue(
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static_cast<double>(line_) / m_sqrtElements );
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const double col = ::basegfx::pruneScaleValue(
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(area - (line_ * m_sqrtElements)) / m_sqrtElements );
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if (! ::basegfx::fTools::equalZero( line )) {
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::basegfx::B2DPolygon poly;
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poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) );
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poly.append( ::basegfx::B2DPoint( 0.0, line ) );
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poly.append( ::basegfx::B2DPoint( 1.0, line ) );
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poly.append( ::basegfx::B2DPoint( 1.0, 0.0 ) );
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poly.setClosed(true);
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res.append(poly);
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}
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if (! ::basegfx::fTools::equalZero( col ))
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{
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double offset = 0.0;
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if ((line_ & 1) == 1) {
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// odd line: => right to left
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offset = (1.0 - col);
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}
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::basegfx::B2DPolygon poly;
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poly.append( ::basegfx::B2DPoint( offset, line ) );
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poly.append( ::basegfx::B2DPoint( offset,
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line + m_elementEdge ) );
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poly.append( ::basegfx::B2DPoint( offset + col,
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line + m_elementEdge ) );
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poly.append( ::basegfx::B2DPoint( offset + col, line ) );
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poly.setClosed(true);
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res.append(poly);
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}
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return res;
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}
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::basegfx::B2DPolyPolygon SnakeWipe::calcHalfDiagonalSnake(
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double t, bool in ) const
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{
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::basegfx::B2DPolyPolygon res;
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if (in) {
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const double sqrtArea2 = sqrt( t * m_sqrtElements * m_sqrtElements );
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const double edge = ::basegfx::pruneScaleValue(
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static_cast<double>( static_cast<sal_Int32>(sqrtArea2) ) /
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m_sqrtElements );
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::basegfx::B2DPolygon poly;
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if (! ::basegfx::fTools::equalZero( edge )) {
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poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) );
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poly.append( ::basegfx::B2DPoint( 0.0, edge ) );
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poly.append( ::basegfx::B2DPoint( edge, 0.0 ) );
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poly.setClosed(true);
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res.append(poly);
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}
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const double a = (M_SQRT1_2 / m_sqrtElements);
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const double d = (sqrtArea2 - static_cast<sal_Int32>(sqrtArea2));
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const double len = (t * M_SQRT2 * d);
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const double height = ::basegfx::pruneScaleValue( M_SQRT1_2 / m_sqrtElements );
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poly.clear();
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poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) );
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poly.append( ::basegfx::B2DPoint( 0.0, height ) );
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poly.append( ::basegfx::B2DPoint( len + a, height ) );
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poly.append( ::basegfx::B2DPoint( len + a, 0.0 ) );
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poly.setClosed(true);
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::basegfx::B2DHomMatrix aTransform;
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if ((static_cast<sal_Int32>(sqrtArea2) & 1) == 1) {
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// odd line
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aTransform.rotate( M_PI_2 + M_PI_4 );
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aTransform.translate( edge + m_elementEdge, 0.0 );
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}
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else {
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aTransform.translate( -a, 0.0 );
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aTransform.rotate( -M_PI_4 );
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aTransform.translate( 0.0, edge );
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}
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poly.transform( aTransform );
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res.append(poly);
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}
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else // out
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{
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const double sqrtArea2 = sqrt( t * m_sqrtElements * m_sqrtElements );
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const double edge = ::basegfx::pruneScaleValue(
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static_cast<double>( static_cast<sal_Int32>(sqrtArea2) ) /
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m_sqrtElements );
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::basegfx::B2DPolygon poly;
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if (! ::basegfx::fTools::equalZero( edge )) {
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poly.append( ::basegfx::B2DPoint( 0.0, 1.0 ) );
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poly.append( ::basegfx::B2DPoint( edge, 1.0 ) );
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poly.append( ::basegfx::B2DPoint( 1.0, edge ) );
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poly.append( ::basegfx::B2DPoint( 1.0, 0.0 ) );
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poly.setClosed(true);
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res.append(poly);
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}
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const double a = (M_SQRT1_2 / m_sqrtElements);
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const double d = (sqrtArea2 - static_cast<sal_Int32>(sqrtArea2));
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const double len = ((1.0 - t) * M_SQRT2 * d);
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const double height = ::basegfx::pruneScaleValue( M_SQRT1_2 / m_sqrtElements );
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poly.clear();
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poly.append( ::basegfx::B2DPoint( 0.0, 0.0 ) );
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poly.append( ::basegfx::B2DPoint( 0.0, height ) );
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poly.append( ::basegfx::B2DPoint( len + a, height ) );
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poly.append( ::basegfx::B2DPoint( len + a, 0.0 ) );
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poly.setClosed(true);
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::basegfx::B2DHomMatrix aTransform;
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if ((static_cast<sal_Int32>(sqrtArea2) & 1) == 1) {
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// odd line
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aTransform.translate( 0.0, -height );
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aTransform.rotate( M_PI_2 + M_PI_4 );
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aTransform.translate( 1.0, edge );
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}
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else {
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aTransform.rotate( -M_PI_4 );
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aTransform.translate( edge, 1.0 );
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}
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poly.transform( aTransform );
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res.append(poly);
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}
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return res;
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}
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::basegfx::B2DPolyPolygon SnakeWipe::operator () ( double t )
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{
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::basegfx::B2DPolyPolygon res;
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if (m_diagonal)
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{
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if (t >= 0.5) {
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res.append( calcHalfDiagonalSnake( 1.0, true ) );
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res.append( calcHalfDiagonalSnake( 2.0 * (t - 0.5), false ) );
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}
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else
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res.append( calcHalfDiagonalSnake( 2.0 * t, true ) );
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}
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else
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res = calcSnake(t);
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return m_flipOnYAxis ? flipOnYAxis(res) : res;
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}
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::basegfx::B2DPolyPolygon ParallelSnakesWipe::operator () ( double t )
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{
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::basegfx::B2DPolyPolygon res;
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if (m_diagonal)
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{
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OSL_ASSERT( m_opposite );
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::basegfx::B2DPolyPolygon half(
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calcHalfDiagonalSnake( t, false /* out */ ) );
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// flip on x axis and rotate 90 degrees:
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::basegfx::B2DHomMatrix aTransform;
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aTransform.scale( 1.0, -1.0 );
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aTransform.translate( -0.5, 0.5 );
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aTransform.rotate( M_PI_2 );
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aTransform.translate( 0.5, 0.5 );
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half.transform( aTransform );
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half.flip();
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res.append( half );
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// rotate 180 degrees:
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aTransform.identity();
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aTransform.translate( -0.5, -0.5 );
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aTransform.rotate( M_PI );
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aTransform.translate( 0.5, 0.5 );
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half.transform( aTransform );
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res.append( half );
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}
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else
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{
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::basegfx::B2DPolyPolygon half( calcSnake( t / 2.0 ) );
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// rotate 90 degrees:
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::basegfx::B2DHomMatrix aTransform;
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aTransform.translate( -0.5, -0.5 );
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aTransform.rotate( M_PI_2 );
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aTransform.translate( 0.5, 0.5 );
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half.transform( aTransform );
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res.append( flipOnYAxis(half) );
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res.append( m_opposite ? flipOnXAxis(half) : half );
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}
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return m_flipOnYAxis ? flipOnYAxis(res) : res;
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}
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}
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}
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