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| 1 | +////////////////////////////////////////////////////////////////////////// |
| 2 | +// |
| 3 | +// Copyright (c) 2016, Esteban Tovagliari. All rights reserved. |
| 4 | +// |
| 5 | +// Redistribution and use in source and binary forms, with or without |
| 6 | +// modification, are permitted provided that the following conditions are |
| 7 | +// met: |
| 8 | +// |
| 9 | +// * Redistributions of source code must retain the above copyright |
| 10 | +// notice, this list of conditions and the following disclaimer. |
| 11 | +// |
| 12 | +// * Redistributions in binary form must reproduce the above copyright |
| 13 | +// notice, this list of conditions and the following disclaimer in the |
| 14 | +// documentation and/or other materials provided with the distribution. |
| 15 | +// |
| 16 | +// * Neither the name of Image Engine Design nor the names of any |
| 17 | +// other contributors to this software may be used to endorse or |
| 18 | +// promote products derived from this software without specific prior |
| 19 | +// written permission. |
| 20 | +// |
| 21 | +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 22 | +// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 23 | +// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 24 | +// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 25 | +// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 26 | +// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 27 | +// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 28 | +// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 29 | +// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 30 | +// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 31 | +// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | +// |
| 33 | +////////////////////////////////////////////////////////////////////////// |
| 34 | + |
| 35 | +#ifndef IECOREAPPLESEED_MOTIONALGO_H |
| 36 | +#define IECOREAPPLESEED_MOTIONALGO_H |
| 37 | + |
| 38 | +#include "IECore/Object.h" |
| 39 | + |
| 40 | +#include "foundation/math/scalar.h" |
| 41 | + |
| 42 | +namespace IECoreAppleseed |
| 43 | +{ |
| 44 | + |
| 45 | +namespace MotionAlgo |
| 46 | +{ |
| 47 | + |
| 48 | +// appleseed requires a power of two number of primitive deformation samples, |
| 49 | +// equally spaced between shutter open / close times. |
| 50 | +// check the time samples and return true if they satisfy the conditions. |
| 51 | +template< typename TimeContainer > |
| 52 | +bool checkTimeSamples( const TimeContainer ×, float shutterOpenTime, float shutterCloseTime ) |
| 53 | +{ |
| 54 | + // check that the number of samples is a power of 2. |
| 55 | + if( !foundation::is_pow2( times.size() ) ) |
| 56 | + { |
| 57 | + return false; |
| 58 | + } |
| 59 | + |
| 60 | + const float eps = 0.01f; |
| 61 | + |
| 62 | + // check that the first and last samples match the shutter times. |
| 63 | + if( !foundation::feq( shutterOpenTime, *times.begin(), eps ) ) |
| 64 | + { |
| 65 | + return false; |
| 66 | + } |
| 67 | + |
| 68 | + if( !foundation::feq( shutterCloseTime, *times.rbegin(), eps ) ) |
| 69 | + { |
| 70 | + return false; |
| 71 | + } |
| 72 | + |
| 73 | + // check that the samples are equally spaced. |
| 74 | + typename TimeContainer::const_iterator next( times.begin() ); |
| 75 | + typename TimeContainer::const_iterator it( next++ ); |
| 76 | + |
| 77 | + float sampleInterval = *next - *it; |
| 78 | + |
| 79 | + for( typename TimeContainer::const_iterator e( times.end() ) ; next != e; ++next ) |
| 80 | + { |
| 81 | + if( !foundation::feq( sampleInterval, *next - *it, eps ) ) |
| 82 | + { |
| 83 | + return false; |
| 84 | + } |
| 85 | + |
| 86 | + it = next; |
| 87 | + } |
| 88 | + |
| 89 | + return true; |
| 90 | +} |
| 91 | + |
| 92 | +// Resample a set of primitive keys so that number of samples |
| 93 | +// is a power of 2, equally spaced between the shutter open and close times. |
| 94 | +void resamplePrimitiveKeys( const std::vector<const IECore::Object *> &samples, const std::vector<float> ×, float shutterOpenTime, float shutterCloseTime, std::vector<IECore::ObjectPtr> &resampledKeys ); |
| 95 | + |
| 96 | +} // namespace MotionAlgo |
| 97 | + |
| 98 | +} // namespace IECoreAppleseed |
| 99 | + |
| 100 | +#endif // IECOREAPPLESEED_MOTIONALGO_H |
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