/usr/include/simgear/props/PropertyInterpolator.hxx is in libsimgear-dev 3.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | // Adapter for interpolating different types of properties.
//
// Copyright (C) 2013 Thomas Geymayer <tomgey@gmail.com>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
#ifndef SG_PROPERTY_INTERPOLATOR_HXX_
#define SG_PROPERTY_INTERPOLATOR_HXX_
#include "easing_functions.hxx"
#include "propsfwd.hxx"
#include <memory>
#include <cassert>
#include <string>
#include <iostream>
namespace simgear
{
class PropertyInterpolator;
typedef SGSharedPtr<PropertyInterpolator> PropertyInterpolatorRef;
/**
* Base class for interpolating different types of properties over time.
*/
class PropertyInterpolator:
public SGReferenced
{
public:
virtual ~PropertyInterpolator();
/**
* Resets animation timer to zero and prepares for interpolation to new
* target value.
*/
void reset(const SGPropertyNode& target);
/**
* Set easing function to be used for interpolation.
*/
void setEasingFunction(easing_func_t easing);
/**
* Calculate an animation step.
*
* @param prop Property being animated
* @param dt Current frame duration
* @return Time not used by the animation (>= 0 if animation has finished,
* else time is negative indicating the remaining time until
* finished)
*/
double update(SGPropertyNode& prop, double dt);
const std::string& getType() const { return _type; }
protected:
friend class PropertyInterpolationMgr;
std::string _type;
easing_func_t _easing;
PropertyInterpolatorRef _next;
double _duration,
_cur_t;
PropertyInterpolator();
virtual void setTarget(const SGPropertyNode& target) = 0;
virtual void init(const SGPropertyNode& prop) = 0;
virtual void write(SGPropertyNode& prop, double t) = 0;
};
class NumericInterpolator:
public PropertyInterpolator
{
protected:
double _end,
_diff;
virtual void setTarget(const SGPropertyNode& target);
virtual void init(const SGPropertyNode& prop);
virtual void write(SGPropertyNode& prop, double t);
};
} // namespace simgear
#endif /* SG_PROPERTY_INTERPOLATOR_HXX_ */
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