Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include "controller/SlsAnimationFunction.hxx"
      21             : #include "model/SlsPageDescriptor.hxx"
      22             : #include "view/SlideSorterView.hxx"
      23             : 
      24             : #include <osl/diagnose.hxx>
      25             : #include <rtl/math.hxx>
      26             : 
      27             : namespace sd { namespace slidesorter { namespace controller {
      28             : 
      29             : //===== AnimationBezierFunction ===============================================
      30             : 
      31           1 : AnimationBezierFunction::AnimationBezierFunction (
      32             :     const double nX1,
      33             :     const double nY1)
      34             :     : mnX1(nX1),
      35             :       mnY1(nY1),
      36           1 :       mnX2(1-nY1),
      37           2 :       mnY2(1-nX1)
      38             : {
      39           1 : }
      40             : 
      41          64 : ::basegfx::B2DPoint AnimationBezierFunction::operator() (const double nT)
      42             : {
      43             :     return ::basegfx::B2DPoint(
      44             :         EvaluateComponent(nT, mnX1, mnX2),
      45          64 :         EvaluateComponent(nT, mnY1, mnY2));
      46             : }
      47             : 
      48         128 : double AnimationBezierFunction::EvaluateComponent (
      49             :     const double nT,
      50             :     const double nV1,
      51             :     const double nV2)
      52             : {
      53         128 :     const double nS (1-nT);
      54             : 
      55             :     // While the control point values 1 and 2 are explicitly given the start
      56             :     // and end values are implicitly given.
      57         128 :     const double nV0 (0);
      58         128 :     const double nV3 (1);
      59             : 
      60         128 :     const double nV01 (nS*nV0 + nT*nV1);
      61         128 :     const double nV12 (nS*nV1 + nT*nV2);
      62         128 :     const double nV23 (nS*nV2 + nT*nV3);
      63             : 
      64         128 :     const double nV012 (nS*nV01 + nT*nV12);
      65         128 :     const double nV123 (nS*nV12 + nT*nV23);
      66             : 
      67         128 :     const double nV0123 (nS*nV012 + nT*nV123);
      68             : 
      69         128 :     return nV0123;
      70             : }
      71             : 
      72             : //===== AnimationParametricFunction ===========================================
      73             : 
      74           1 : AnimationParametricFunction::AnimationParametricFunction (const ParametricFunction& rFunction)
      75           1 :     : maY()
      76             : {
      77           1 :     const sal_Int32 nSampleCount (64);
      78             : 
      79             :     // Sample the given parametric function.
      80           1 :     ::std::vector<basegfx::B2DPoint> aPoints;
      81           1 :     aPoints.reserve(nSampleCount);
      82          65 :     for (sal_Int32 nIndex=0; nIndex<nSampleCount; ++nIndex)
      83             :     {
      84          64 :         const double nT (nIndex/double(nSampleCount-1));
      85          64 :         aPoints.push_back(basegfx::B2DPoint(rFunction(nT)));
      86             :     }
      87             : 
      88             :     // Interpolate at evenly spaced points.
      89           1 :     maY.clear();
      90           1 :     maY.reserve(nSampleCount);
      91           1 :     double nX0 (aPoints[0].getX());
      92           1 :     double nY0 (aPoints[0].getY());
      93           1 :     double nX1 (aPoints[1].getX());
      94           1 :     double nY1 (aPoints[1].getY());
      95           1 :     sal_Int32 nIndex (1);
      96          65 :     for (sal_Int32 nIndex2=0; nIndex2<nSampleCount; ++nIndex2)
      97             :     {
      98          64 :         const double nX (nIndex2 / double(nSampleCount-1));
      99         191 :         while (nX > nX1 && nIndex<nSampleCount)
     100             :         {
     101          63 :             nX0 = nX1;
     102          63 :             nY0 = nY1;
     103          63 :             nX1 = aPoints[nIndex].getX();
     104          63 :             nY1 = aPoints[nIndex].getY();
     105          63 :             ++nIndex;
     106             :         }
     107          64 :         const double nU ((nX-nX1) / (nX0 - nX1));
     108          64 :         const double nY (nY0*nU + nY1*(1-nU));
     109          64 :         maY.push_back(nY);
     110           1 :     }
     111           1 : }
     112             : 
     113           1 : double AnimationParametricFunction::operator() (const double nX)
     114             : {
     115           1 :     const sal_Int32 nIndex0 (static_cast<sal_Int32>(nX * maY.size()));
     116           1 :     const double nX0 (nIndex0 / double(maY.size()-1));
     117           1 :     const sal_uInt32 nIndex1 (nIndex0 + 1);
     118           1 :     const double nX1 (nIndex1 / double(maY.size()-1));
     119             : 
     120           1 :     if (nIndex0<=0)
     121           0 :         return maY[0];
     122           1 :     else if (sal_uInt32(nIndex0)>=maY.size() || nIndex1>=maY.size())
     123           1 :         return maY[maY.size()-1];
     124             : 
     125           0 :     const double nU ((nX-nX1) / (nX0 - nX1));
     126           0 :     return maY[nIndex0]*nU + maY[nIndex1]*(1-nU);
     127             : }
     128             : 
     129          66 : } } } // end of namespace ::sd::slidesorter::controller
     130             : 
     131             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */