1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
#include <sal/config.h>
#include <o3tl/safeint.hxx>
#include <controller/SlsAnimationFunction.hxx>
namespace sd::slidesorter::controller {
//===== AnimationBezierFunction ===============================================
AnimationBezierFunction::AnimationBezierFunction (
const double nX1,
const double nY1)
: mnX1(nX1),
mnY1(nY1),
mnX2(1-nY1),
mnY2(1-nX1)
{
}
::basegfx::B2DPoint AnimationBezierFunction::operator() (const double nT)
{
return ::basegfx::B2DPoint(
EvaluateComponent(nT, mnX1, mnX2),
EvaluateComponent(nT, mnY1, mnY2));
}
double AnimationBezierFunction::EvaluateComponent (
const double nT,
const double nV1,
const double nV2)
{
const double nS (1-nT);
// While the control point values 1 and 2 are explicitly given the start
// and end values are implicitly given.
const double nV0 (0);
const double nV3 (1);
const double nV01 (nS*nV0 + nT*nV1);
const double nV12 (nS*nV1 + nT*nV2);
const double nV23 (nS*nV2 + nT*nV3);
const double nV012 (nS*nV01 + nT*nV12);
const double nV123 (nS*nV12 + nT*nV23);
const double nV0123 (nS*nV012 + nT*nV123);
return nV0123;
}
//===== AnimationParametricFunction ===========================================
AnimationParametricFunction::AnimationParametricFunction (const ParametricFunction& rFunction)
: maY()
{
const sal_Int32 nSampleCount (64);
// Sample the given parametric function.
::std::vector<basegfx::B2DPoint> aPoints;
aPoints.reserve(nSampleCount);
for (sal_Int32 nIndex=0; nIndex<nSampleCount; ++nIndex)
{
const double nT (nIndex/double(nSampleCount-1));
aPoints.emplace_back(rFunction(nT));
}
// Interpolate at evenly spaced points.
maY.clear();
maY.reserve(nSampleCount);
double nX0 (aPoints[0].getX());
double nY0 (aPoints[0].getY());
double nX1 (aPoints[1].getX());
double nY1 (aPoints[1].getY());
sal_Int32 nIndex (1);
for (sal_Int32 nIndex2=0; nIndex2<nSampleCount; ++nIndex2)
{
const double nX (nIndex2 / double(nSampleCount-1));
while (nX > nX1 && nIndex<nSampleCount)
{
nX0 = nX1;
nY0 = nY1;
nX1 = aPoints[nIndex].getX();
nY1 = aPoints[nIndex].getY();
++nIndex;
}
const double nU ((nX-nX1) / (nX0 - nX1));
const double nY (nY0*nU + nY1*(1-nU));
maY.push_back(nY);
}
}
double AnimationParametricFunction::operator() (const double nX)
{
const sal_Int32 nIndex0 (static_cast<sal_Int32>(nX * maY.size()));
const double nX0 (nIndex0 / double(maY.size()-1));
const sal_uInt32 nIndex1 (nIndex0 + 1);
const double nX1 (nIndex1 / double(maY.size()-1));
if (nIndex0<=0)
return maY[0];
else if (o3tl::make_unsigned(nIndex0)>=maY.size() || nIndex1>=maY.size())
return maY[maY.size()-1];
const double nU ((nX-nX1) / (nX0 - nX1));
return maY[nIndex0]*nU + maY[nIndex1]*(1-nU);
}
} // end of namespace ::sd::slidesorter::controller
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
