134 lines
3.5 KiB
C++
134 lines
3.5 KiB
C++
/* -*-c++-*-
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* Copyright (C) 2008 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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#ifndef OSGANIMATION_TARGET_H
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#define OSGANIMATION_TARGET_H
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#include <vector>
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#include <osg/Quat>
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#include <osg/Vec3>
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#include <osg/Vec2>
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#include <osg/Vec4>
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#include <osg/Referenced>
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#include <osgAnimation/Export>
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namespace osgAnimation
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{
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class Channel;
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class OSGANIMATION_EXPORT Target : public osg::Referenced
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{
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public:
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Target();
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virtual ~Target();
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virtual void normalize() = 0;
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float getWeight() const { return _weight; }
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void reset() { _weight = 0;}
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int getCount() const { return referenceCount(); }
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protected:
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void addWeight(float w) { _weight += w; }
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float _weight;
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};
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template <class T>
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class TemplateTarget : public Target
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{
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public:
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TemplateTarget() {}
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TemplateTarget(const T& v) { setValue(v); }
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void update(float weight, const T& val)
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{
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if (!_weight)
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_target = val * weight;
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else
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{
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weight = (1.0 - _weight) * weight;
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_target += val * weight;
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}
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addWeight(weight);
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}
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const T& getValue() const { return _target;}
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void normalize()
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{
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float weightSummed = getWeight();
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if (fabs(weightSummed) < 1e-4 || fabs(weightSummed-1) < 1e-4)
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return;
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(_target) /= weightSummed;
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}
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void setValue(const T& value) { _target = value;}
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protected:
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T _target;
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};
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// Target Specialisation for Quaternions
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template <>
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class TemplateTarget< osg::Quat > : public Target
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{
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public:
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TemplateTarget () {}
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TemplateTarget (const osg::Quat& q) { setValue(q); }
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const osg::Quat& getValue() const { return _target;}
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void update(float weight, const osg::Quat& val)
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{
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if (!_weight)
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_target = val * weight;
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else
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{
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weight = (1.0 - _weight) * weight;
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_target += val * weight;
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}
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addWeight(weight);
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}
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// maybe normalize could be non virtual and put on ITarget
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void normalize()
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{
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float weightSummed = getWeight();
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if (fabs(weightSummed) < 1e-4 || fabs(weightSummed-1.0) < 1e-4)
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return;
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(_target) /= weightSummed;
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}
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void setValue(const osg::Quat& value) { _target = value;}
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protected:
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osg::Quat _target;
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};
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typedef TemplateTarget<osg::Quat> QuatTarget;
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typedef TemplateTarget<osg::Vec3> Vec3Target;
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typedef TemplateTarget<osg::Vec4> Vec4Target;
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typedef TemplateTarget<osg::Vec2> Vec2Target;
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typedef TemplateTarget<float> FloatTarget;
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typedef TemplateTarget<double> DoubleTarget;
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}
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#endif
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