AOO410/main/slideshow/source/engine/transitions/zigzagwipe.cxx

/**************************************************************
 * 
 * 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/numeric/ftools.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include "transitiontools.hxx"
#include "zigzagwipe.hxx"


namespace slideshow {
namespace internal {

ZigZagWipe::ZigZagWipe( sal_Int32 nZigs ) : m_zigEdge( 1.0 / nZigs )
{
    const double d = m_zigEdge;
    const double d2 = (d / 2.0);
    m_stdZigZag.append( ::basegfx::B2DPoint( -1.0 - d, -d ) );
    m_stdZigZag.append( ::basegfx::B2DPoint( -1.0 - d, 1.0 + d ) );
    m_stdZigZag.append( ::basegfx::B2DPoint( -d, 1.0 + d ) );
    for ( sal_Int32 pos = (nZigs + 2); pos--; ) {
        m_stdZigZag.append( ::basegfx::B2DPoint( 0.0, ((pos - 1) * d) + d2 ) );
        m_stdZigZag.append( ::basegfx::B2DPoint( -d, (pos - 1) * d ) );
    }
    m_stdZigZag.setClosed(true);
}

::basegfx::B2DPolyPolygon ZigZagWipe::operator () ( double t )
{
    ::basegfx::B2DPolyPolygon res(m_stdZigZag);
    res.transform(basegfx::tools::createTranslateB2DHomMatrix((1.0 + m_zigEdge) * t, 0.0));
    return res;
}

::basegfx::B2DPolyPolygon BarnZigZagWipe::operator () ( double t )
{
    ::basegfx::B2DPolyPolygon res( createUnitRect() );
    ::basegfx::B2DPolygon poly( m_stdZigZag );
    poly.flip();
    basegfx::B2DHomMatrix aTransform(basegfx::tools::createTranslateB2DHomMatrix(
        (1.0 + m_zigEdge) * (1.0 - t) / 2.0, 0.0));
    poly.transform( aTransform );
    res.append( poly );
    aTransform.scale( -1.0, 1.0 );
    aTransform.translate( 1.0, m_zigEdge / 2.0 );
    poly = m_stdZigZag;
    poly.transform( aTransform );
    res.append( poly );
    return res;
}

}
}