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Dogcows Code - chaz/yoink/blob - src/Moof/Interpolator.hh
e49ac694c2d0c3876c3b0028ca46e85e6131e462
2 /*******************************************************************************
4 Copyright (c) 2009, Charles McGarvey
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
10 * Redistributions of source code must retain the above copyright notice,
11 this list of conditions and the following disclaimer.
12 * Redistributions in binary form must reproduce the above copyright notice,
13 this list of conditions and the following disclaimer in the documentation
14 and/or other materials provided with the distribution.
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
20 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *******************************************************************************/
29 #ifndef _MOOF_INTERPOLATOR_HH_
30 #define _MOOF_INTERPOLATOR_HH_
32 #include <Moof/Log.hh>
33 #include <Moof/Math.hh>
52 class Interpolator
: public T
56 Interpolator(Scalar t
= 1.0, Interp::Mode mode
= Interp::STOP
)
61 void reset(Scalar t
= 1.0, Interp::Mode mode
= Interp::STOP
)
69 void update(Scalar t
, Scalar dt
)
73 mPrevState
= T::getValue();
74 mAlpha
+= dt
* mScale
;
76 if (mPrevState
== T::calculate(mAlpha
)) mIsDone
= true;
80 typename
T::Type
getState(Scalar alpha
) const
82 return cml::lerp(mPrevState
, T::getValue(), alpha
);
102 mAlpha
-= SCALAR(1.0);
104 case Interp::OSCILLATE
:
105 mAlpha
= SCALAR(2.0) - mAlpha
;
110 else if (mAlpha
< 0.0)
115 mAlpha
= SCALAR(0.0);
118 mAlpha
+= SCALAR(1.0);
120 case Interp::OSCILLATE
:
133 typename
T::Type mPrevState
;
137 template <typename T
= Scalar
>
144 void init(const Type
& a
, const Type
& b
)
150 const Type
& calculate(Scalar alpha
)
152 mState
= cml::lerp(mStart
, mFinish
, alpha
);
156 const Type
& getValue() const
169 typedef Interpolator
< Linear
<Scalar
> > Lerp
;
174 #endif // _MOOF_INTERPOLATOR_HH_
176 /** vim: set ts=4 sw=4 tw=80: *************************************************/
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