46 lines
1.5 KiB
C++
46 lines
1.5 KiB
C++
/* -*-c++-*-
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* Copyright (C) 2009 Cedric Pinson <cedric.pinson@plopbyte.net>
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osgAnimation/ActionBlendIn>
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using namespace osgAnimation;
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ActionBlendIn::ActionBlendIn() : _weight(0) {}
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ActionBlendIn::ActionBlendIn(const ActionBlendIn& a, const osg::CopyOp& c) : Action(a,c)
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{
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_weight = a._weight;
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_animation = a._animation;
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}
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ActionBlendIn::ActionBlendIn(Animation* animation, double duration, double weight)
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{
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_animation = animation;
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_weight = weight;
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float d = duration * _fps;
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setNumFrames(static_cast<unsigned int>(floor(d)) + 1);
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setName("BlendIn");
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}
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void ActionBlendIn::computeWeight(unsigned int frame)
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{
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// frame + 1 because the start is 0 and we want to start the blend in at the first
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// frame.
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double ratio = ( (frame+1) * 1.0 / (getNumFrames()) );
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double w = _weight * ratio;
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OSG_DEBUG << getName() << " BlendIn frame " << frame << " weight " << w << std::endl;
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_animation->setWeight(w);
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}
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