AbcBullet/MayaTransformWriter.h

AbcBullet/MayaTransformWriter.h
//-*****************************************************************************
//
// Copyright (c) 2009-2011,
// Sony Pictures Imageworks Inc. and
// Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
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#ifndef _AlembicExport_MayaTransformWriter_h_
#define _AlembicExport_MayaTransformWriter_h_
#include "Foundation.h"
#include <Alembic/AbcGeom/OXform.h>
#include <Alembic/AbcGeom/XformOp.h>
#include "AttributesWriter.h"
// AnimChan contains what animated plugs to get as a double, and the helper
// info about what operation and which channel to set in mSample
struct AnimSampler;
struct AnimChan
{
AnimChan()
: scale(1.0)
, opNum(0)
, channelNum(0)
, channelOp(Alembic::AbcGeom::kScaleOperation)
, sampler(NULL)
{
}
double asDouble(void);
// extra value to multiply the data off of the plug by, used to invert
// certain operations, and convert radians to degrees
double scale;
MPlug plug;
AnimSampler* sampler;
std::size_t opNum;
Alembic::AbcGeom::XformOperationType channelOp;
Alembic::Util::uint32_t channelNum;
};
struct AnimSampler
{
virtual ~AnimSampler() {;}
virtual const MString& name() const = 0;
virtual double asDouble(Alembic::AbcGeom::XformOperationType channelOp, Alembic::Util::uint32_t channelNum) = 0;
virtual AnimChan animChan(Alembic::AbcGeom::XformOperationType channelOp, Alembic::Util::uint32_t channelNum, double scale = 1.0) const
{
AnimChan chan;
chan.channelOp = channelOp;
chan.channelNum = channelNum;
chan.sampler = (AnimSampler*)this;
chan.scale = scale;
return chan;
}
bool isTranslationChannel(Alembic::AbcGeom::XformOperationType channelOp, Alembic::Util::uint32_t channelNum) const
{
return channelOp == Alembic::AbcGeom::kTranslateOperation && channelNum <= 2 /* channel2 */;
}
bool isRotationChannel(Alembic::AbcGeom::XformOperationType channelOp, Alembic::Util::uint32_t channelNum) const
{
return channelOp >= Alembic::AbcGeom::kRotateXOperation &&
channelOp <= Alembic::AbcGeom::kRotateZOperation &&
channelNum <= 2 /* channel2 */;
}
};
inline double AnimChan::asDouble(void)
{
return (sampler) ? sampler->asDouble( channelOp, channelNum ) : plug.asDouble();
}
// Writes an MFnTransform
class MayaTransformWriter
{
public:
enum {
kChannel0=0,
kChannel1=1,
kChannel2=2,
};
MayaTransformWriter(Alembic::Abc::OObject & iParent, MDagPath & iDag,
Alembic::Util::uint32_t iTimeIndex, const JobArgs & iArgs);
MayaTransformWriter(MayaTransformWriter & iParent, MDagPath & iDag,
Alembic::Util::uint32_t iTimeIndex, const JobArgs & iArgs);
MayaTransformWriter(Alembic::Abc::OObject & iParent,
const AnimSampler& sampler,
Alembic::Util::uint32_t iTimeIndex, const JobArgs & iArgs);
~MayaTransformWriter();
void write();
bool isAnimated() const;
Alembic::Abc::OObject getObject() {return mSchema.getObject();};
AttributesWriterPtr getAttrs() {return mAttrs;};
private:
Alembic::AbcGeom::OXformSchema mSchema;
AttributesWriterPtr mAttrs;
void pushTransformStack(const MFnTransform & iTrans, bool iForceStatic);
void pushTransformStack(const MFnIkJoint & iTrans, bool iForceStatic);
void pushTransformStack(const AnimSampler& sampler, bool iForceStatic);
Alembic::AbcGeom::XformSample mSample;
std::vector < AnimChan > mAnimChanList;
MPlug mInheritsPlug;
size_t mJointOrientOpIndex[3];
size_t mRotateOpIndex[3];
size_t mRotateAxisOpIndex[3];
bool mVerbose;
bool mFilterEulerRotations;
// NOTE: should be able to get mName from mSchema
MString mName;
MEulerRotation mPrevJointOrientSolution;
MEulerRotation mPrevRotateSolution;
MEulerRotation mPrevRotateAxisSolution;
};
typedef Alembic::Util::shared_ptr < MayaTransformWriter >
MayaTransformWriterPtr;
#endif // _AlembicExport_MayaTransformWriter_h_