Dummy animation support for AssimpView - work in progress. Uses boost in a new way, just because I can.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@191 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
pull/1/head
ulfjorensen 2008-10-22 15:36:54 +00:00
parent de476178cd
commit 013ff599a5
4 changed files with 238 additions and 1 deletions

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/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
---------------------------------------------------------------------------
Copyright (c) 2006-2008, ASSIMP Development Team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the following
conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.
* Neither the name of the ASSIMP team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the ASSIMP Development Team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------
*/
#include "stdafx.h"
#include "assimp_view.h"
using namespace AssimpView;
// ------------------------------------------------------------------------------------------------
// Constructor on a given animation.
AnimEvaluator::AnimEvaluator( const aiAnimation* pAnim)
{
mAnim = pAnim;
mLastTime = 0.0;
mLastPositions.resize( pAnim->mNumChannels, boost::make_tuple( 0, 0, 0));
}
// ------------------------------------------------------------------------------------------------
// Evaluates the animation tracks for a given time stamp.
void AnimEvaluator::Evaluate( double pTime)
{
// extract ticks per second. Assume default value if not given
double ticksPerSecond = mAnim->mTicksPerSecond != 0.0 ? mAnim->mTicksPerSecond : 25.0;
// every following time calculation happens in ticks
pTime *= ticksPerSecond;
// map into anim's duration
double time = 0.0f;
if( mAnim->mDuration > 0.0)
time = fmod( pTime, mAnim->mDuration);
// calculate the transformations for each animation channel
for( unsigned int a = 0; a < mAnim->mNumChannels; a++)
{
const aiNodeAnim* channel = mAnim->mChannels[a];
// ******** Position *****
aiVector3D presentPosition( 0, 0, 0);
if( channel->mPositionKeys > 0)
{
// Look for present frame number. Search from last position if time is after the last time, else from beginning
// Should be much quicker than always looking from start for the average use case.
unsigned int frame = (time >= mLastTime) ? mLastPositions[a].get<0>() : 0;
while( frame < channel->mNumPositionKeys - 1)
{
if( time < channel->mPositionKeys[frame+1].mTime)
break;
frame++;
}
// TODO: (thom) interpolation maybe?
presentPosition = channel->mPositionKeys[frame].mValue;
mLastPositions[a].get<0>() = frame;
}
// ******** Rotation *********
aiQuaternion presentRotation( 1, 0, 0, 0);
if( channel->mRotationKeys > 0)
{
unsigned int frame = (time >= mLastTime) ? mLastPositions[a].get<1>() : 0;
while( frame < channel->mNumRotationKeys - 1)
{
if( time < channel->mRotationKeys[frame+1].mTime)
break;
frame++;
}
// TODO: (thom) quaternions are a prime target for interpolation
presentRotation = channel->mRotationKeys[frame].mValue;
mLastPositions[a].get<1>() = frame;
}
// ******** Scaling **********
aiVector3D presentScaling( 0, 0, 0);
if( channel->mScalingKeys > 0)
{
unsigned int frame = (time >= mLastTime) ? mLastPositions[a].get<2>() : 0;
while( frame < channel->mNumScalingKeys - 1)
{
if( time < channel->mScalingKeys[frame+1].mTime)
break;
frame++;
}
// TODO: (thom) interpolation maybe? This time maybe even logarithmic, not linear
presentScaling = channel->mScalingKeys[frame].mValue;
mLastPositions[a].get<2>() = frame;
}
// build a transformation matrix from it
aiMatrix4x4& mat = mTransforms[a];
mat = aiMatrix4x4( presentRotation.GetMatrix());
mat.a1 *= presentScaling.x; mat.b1 *= presentScaling.x; mat.c1 *= presentScaling.x;
mat.a2 *= presentScaling.y; mat.b2 *= presentScaling.y; mat.c2 *= presentScaling.y;
mat.a3 *= presentScaling.z; mat.b3 *= presentScaling.z; mat.c3 *= presentScaling.z;
mat.a4 = presentPosition.x; mat.b4 = presentPosition.y; mat.c4 = presentPosition.z;
}
mLastTime = time;
}

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/** Calculates a pose for a given time of an animation */
/*
---------------------------------------------------------------------------
Open Asset Import Library (ASSIMP)
---------------------------------------------------------------------------
Copyright (c) 2006-2008, ASSIMP Development Team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the following
conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.
* Neither the name of the ASSIMP team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the ASSIMP Development Team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------
*/
#ifndef AV_ANIMEVALUATOR_H_INCLUDED
#define AV_ANIMEVALUATOR_H_INCLUDED
#include <boost/tuple/tuple.hpp>
namespace AssimpView
{
class AnimEvaluator
{
public:
/** Constructor on a given animation. The animation is fixed throughout the lifetime of
* the object.
* @param pAnim The animation to calculate poses for. Ownership of the animation object stays
* at the caller, the evaluator just keeps a reference to it as long as it persists.
*/
AnimEvaluator( const aiAnimation* pAnim);
/** Evaluates the animation tracks for a given time stamp. The calculated pose can be retrieved as a
* array of transformation matrices afterwards by calling GetTransformations().
* @param pTime The time for which you want to evaluate the animation, in seconds. Will be mapped into the animation cycle, so
* it can be an arbitrary value. Best use with ever-increasing time stamps.
*/
void Evaluate( double pTime);
/** Returns the transform matrices calculated at the last Evaluate() call. The array matches the mChannels array of
* the aiAnimation. */
const std::vector<aiMatrix4x4>& GetTransformations() const { return mTransforms; }
protected:
/** The animation we're working on */
const aiAnimation* mAnim;
/** At which frame the last evaluation happened for each channel.
* Useful to quickly find the corresponding frame for slightly increased time stamps
*/
double mLastTime;
std::vector<boost::tuple<unsigned int, unsigned int, unsigned int> > mLastPositions;
/** The array to store the transformations results of the evaluation */
std::vector<aiMatrix4x4> mTransforms;
};
} // end of namespace AssimpView
#endif // AV_ANIMEVALUATOR_H_INCLUDED

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@ -255,6 +255,9 @@ enum EClickPos
extern float g_fACMR /*= 3.0f*/; extern float g_fACMR /*= 3.0f*/;
extern IDirect3DQuery9* g_piQuery; extern IDirect3DQuery9* g_piQuery;
}; }
// outside of namespace, to help Intellisense and solve boost::metatype_stuff_miracle
#include "AnimEvaluator.h"
#endif // !! AV_MAIN_H_INCLUDED #endif // !! AV_MAIN_H_INCLUDED

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