Field3D
MatrixFieldMapping Class Reference

Represents the mapping of a field by a matrix transform. More...

#include <FieldMapping.h>

Inheritance diagram for MatrixFieldMapping:
FieldMapping RefBase

Public Types

typedef MatrixFieldMapping class_type
 
typedef Curve< Imath::M44dMatrixCurve
 Time-varying matrix. More...
 
typedef boost::intrusive_ptr< MatrixFieldMappingPtr
 Convenience typedef. More...
 
- Public Types inherited from FieldMapping
typedef FieldMapping class_type
 
typedef boost::intrusive_ptr< FieldMappingPtr
 
- Public Types inherited from RefBase
typedef boost::intrusive_ptr< RefBasePtr
 
typedef boost::weak_ptr< RefBaseWeakPtr
 

Public Member Functions

const M44dlocalToWorld () const
 Returns a reference to the local to world transform. More...
 
const MatrixCurve::SampleVeclocalToWorldSamples () const
 Returns a vector of all motion samples for local to world transform. More...
 
void makeIdentity ()
 Sets the transform to identity. This makes it functionally equivalent to a NullFieldMapping. More...
 
void setLocalToWorld (const M44d &lsToWs)
 Sets the local to world transform. All other matrices will be updated based on this. More...
 
void setLocalToWorld (float t, const M44d &lsToWs)
 Sets the local to world transform at a given time. More...
 
const M44dvoxelToWorld () const
 Returns a reference to the voxel to world space transform. More...
 
const M44dworldToVoxel () const
 Returns a reference to the world to voxel space transform. More...
 
M44d worldToVoxel (float time) const
 Returns the world to voxel space transform at a given time. More...
 
Constructors & destructor
 MatrixFieldMapping ()
 
 MatrixFieldMapping (const Box3i &extents)
 
From FieldMapping
virtual void worldToVoxel (const V3d &wsP, V3d &vsP) const
 Transform from world space position into voxel space. More...
 
virtual void worldToVoxel (const V3d &wsP, V3d &vsP, float time) const
 
virtual void voxelToWorld (const V3d &vsP, V3d &wsP) const
 Transform from voxel space position into world space. More...
 
virtual void voxelToWorld (const V3d &vsP, V3d &wsP, float time) const
 
virtual void worldToLocal (const V3d &wsP, V3d &lsP) const
 Transform from world space position into local space. More...
 
virtual void worldToLocal (const V3d &wsP, V3d &lsP, float time) const
 
virtual void localToWorld (const V3d &lsP, V3d &wsP) const
 Transform from local space position into world space. More...
 
virtual void localToWorld (const V3d &lsP, V3d &wsP, float time) const
 
void worldToVoxelDir (const V3d &wsV, V3d &vsV) const
 
void voxelToWorldDir (const V3d &vsV, V3d &wsV) const
 
void worldToLocalDir (const V3d &wsV, V3d &lsV) const
 
void localToWorldDir (const V3d &lsV, V3d &wsV) const
 
virtual void extentsChanged ()
 Implement this if the subclass needs to update itself when the resolution changes. More...
 
virtual std::string className () const
 Returns the FieldMapping type name. Used when writing/reading from disk. More...
 
virtual bool isIdentical (FieldMapping::Ptr other, double tolerance=0.0) const
 Whether the mapping is identical to another mapping. More...
 
virtual V3d wsVoxelSize (int, int, int) const
 Returns world-space size of a voxel at the specified coordinate. More...
 
virtual FieldMapping::Ptr clone () const
 Returns a pointer to a copy of the mapping, pure virtual so ensure derived classes properly implement it. More...
 
- Public Member Functions inherited from FieldMapping
const V3dorigin () const
 Returns the origin. More...
 
const V3dresolution () const
 Returns the resolution. More...
 
void setExtents (const Box3i &extents)
 This sets the field extents information to use for defining the local coordinate space. More...
 
 FieldMapping ()
 Constructor. More...
 
 FieldMapping (const Box3i &extents)
 Construct with known extents. More...
 
virtual ~FieldMapping ()
 Destructor. More...
 
void localToVoxel (const V3d &lsP, V3d &vsP) const
 Transform from local space to voxel space. This is just a multiplication by the resolution of the Field that we're mapping. More...
 
void voxelToLocal (const V3d &vsP, V3d &lsP) const
 Inverse of localToVoxel. More...
 
- Public Member Functions inherited from RefBase
void ref () const
 Used by boost::intrusive_pointer. More...
 
size_t refcnt ()
 Used by boost::intrusive_pointer. More...
 
void unref () const
 Used by boost::intrusive_pointer. More...
 
WeakPtr weakPtr () const
 
 RefBase ()
 
 RefBase (const RefBase &)
 Copy constructor. More...
 
RefBaseoperator= (const RefBase &)
 Assignment operator. More...
 
virtual ~RefBase ()
 Destructor. More...
 
virtual bool checkRTTI (const char *typenameStr)=0
 This function is only implemented by concrete classes and triggers the actual RTTI check through matchRTTI();. More...
 
bool matchRTTI (const char *typenameStr)
 Performs a check to see if the given typename string matches this class' This needs to be implemented in -all- subclasses, even abstract ones. More...
 

Static Public Member Functions

static const char * staticClassType ()
 
- Static Public Member Functions inherited from FieldMapping
static const char * staticClassType ()
 
- Static Public Member Functions inherited from RefBase
static const char * staticClassType ()
 

Public Attributes

 DEFINE_FIELD_RTTI_CONCRETE_CLASS
 
- Public Attributes inherited from FieldMapping
 DEFINE_FIELD_RTTI_ABSTRACT_CLASS
 

Private Types

typedef FieldMapping base
 Convenience typedef for referring to base class. More...
 

Private Member Functions

void getLocalToVoxelMatrix (M44d &result)
 
void updateTransform ()
 Updates the local to world transformation matrix. More...
 

Private Attributes

bool m_isTimeVarying
 Stores whether the curve has more than one time sample. More...
 
M44d m_lsToWs
 Local space to world space. More...
 
MatrixCurve m_lsToWsCurve
 Time-varying local to world space transform. More...
 
M44d m_vsToWs
 Voxel space to world space. More...
 
MatrixCurve m_vsToWsCurve
 Time-varying voxel to world space transform. More...
 
M44d m_wsToLs
 World space to local space. More...
 
M44d m_wsToVs
 World space to voxel space. More...
 
V3d m_wsVoxelSize
 Precomputed world-space voxel size. Calculations may assume orthogonal transformation for efficiency. More...
 

Additional Inherited Members

- Protected Attributes inherited from FieldMapping
V3d m_origin
 The integer voxel-space origin of the underlying Field object. Is equal to field.extents.min. More...
 
V3d m_res
 The integer voxel-space resolution of the underlying Field object. Is equal to field.extents.max - field.extents.min + 1. More...
 

Detailed Description

Represents the mapping of a field by a matrix transform.

Refer to using_mappings for examples of how to use this in your code.

Note
Regarding time-varying matrices. If setLocalToWorld(M44d) is called, an underlying Curve object is created with just one sample at time=0.0.
Todo:
Add calls for easily specifying the transform given grid size, offset, rotation, etc.

Definition at line 334 of file FieldMapping.h.

Member Typedef Documentation

typedef boost::intrusive_ptr<MatrixFieldMapping> MatrixFieldMapping::Ptr

Convenience typedef.

Definition at line 341 of file FieldMapping.h.

Time-varying matrix.

Definition at line 343 of file FieldMapping.h.

Convenience typedef for referring to base class.

Definition at line 530 of file FieldMapping.h.

Constructor & Destructor Documentation

MatrixFieldMapping::MatrixFieldMapping ( )

Definition at line 253 of file FieldMapping.cpp.

References makeIdentity().

Referenced by clone().

254  : FieldMapping()
255 {
256  makeIdentity();
257 }
FieldMapping()
Constructor.
void makeIdentity()
Sets the transform to identity. This makes it functionally equivalent to a NullFieldMapping.
MatrixFieldMapping::MatrixFieldMapping ( const Box3i extents)

Definition at line 261 of file FieldMapping.cpp.

References makeIdentity().

262  : FieldMapping(extents)
263 {
264  makeIdentity();
265 }
FieldMapping()
Constructor.
void makeIdentity()
Sets the transform to identity. This makes it functionally equivalent to a NullFieldMapping.

Member Function Documentation

static const char* MatrixFieldMapping::staticClassType ( )
inlinestatic

Definition at line 350 of file FieldMapping.h.

Referenced by className().

351  {
352  return "MatrixFieldMapping";
353  }
void MatrixFieldMapping::setLocalToWorld ( const M44d lsToWs)

Sets the local to world transform. All other matrices will be updated based on this.

Note
This resets the Curve to contain just one sample at time=0.0

Definition at line 269 of file FieldMapping.cpp.

References m_lsToWsCurve, makeIdentity(), and Curve< T >::numSamples().

270 {
271  if (m_lsToWsCurve.numSamples() > 0) {
272  makeIdentity();
273  }
274  setLocalToWorld(0.0f, lsToWs);
275 }
size_t numSamples() const
Returns the number of samples in the curve.
Definition: Curve.h:99
void setLocalToWorld(const M44d &lsToWs)
Sets the local to world transform. All other matrices will be updated based on this.
MatrixCurve m_lsToWsCurve
Time-varying local to world space transform.
Definition: FieldMapping.h:515
void makeIdentity()
Sets the transform to identity. This makes it functionally equivalent to a NullFieldMapping.
void MatrixFieldMapping::setLocalToWorld ( float  t,
const M44d lsToWs 
)

Sets the local to world transform at a given time.

Definition at line 279 of file FieldMapping.cpp.

References Curve< T >::addSample(), m_lsToWsCurve, and updateTransform().

280 {
281  m_lsToWsCurve.addSample(t, lsToWs);
282  updateTransform();
283 }
MatrixCurve m_lsToWsCurve
Time-varying local to world space transform.
Definition: FieldMapping.h:515
void addSample(const float t, const T &value)
Adds a sample point to the curve.
Definition: Curve.h:172
void updateTransform()
Updates the local to world transformation matrix.
const M44d& MatrixFieldMapping::localToWorld ( ) const
inline

Returns a reference to the local to world transform.

Note
This assumes the query to be at time=0.0

Definition at line 376 of file FieldMapping.h.

377  { return m_lsToWs; }
M44d m_lsToWs
Local space to world space.
Definition: FieldMapping.h:503
const M44d& MatrixFieldMapping::worldToVoxel ( ) const
inline

Returns a reference to the world to voxel space transform.

Note
This assumes the query to be at time=0.0

Definition at line 381 of file FieldMapping.h.

Referenced by FieldWrapper< Field_T >::setWsBoundsOptimization(), and MIPFieldWrapper< Field_T >::setWsBoundsOptimization().

382  { return m_wsToVs; }
M44d m_wsToVs
World space to voxel space.
Definition: FieldMapping.h:512
M44d MatrixFieldMapping::worldToVoxel ( float  time) const
inline

Returns the world to voxel space transform at a given time.

Definition at line 385 of file FieldMapping.h.

386  {
387  if (!m_isTimeVarying) {
388  return m_wsToVs;
389  } else {
390  return m_vsToWsCurve.linear(time).inverse();
391  }
392  }
MatrixCurve m_vsToWsCurve
Time-varying voxel to world space transform.
Definition: FieldMapping.h:517
T linear(const float t) const
Linearly interpolates a value from the curve.
Definition: Curve.h:199
bool m_isTimeVarying
Stores whether the curve has more than one time sample.
Definition: FieldMapping.h:521
M44d m_wsToVs
World space to voxel space.
Definition: FieldMapping.h:512
const M44d& MatrixFieldMapping::voxelToWorld ( ) const
inline

Returns a reference to the voxel to world space transform.

Note
This assumes the query to be at time=0.0

Definition at line 396 of file FieldMapping.h.

397  { return m_vsToWs; }
M44d m_vsToWs
Voxel space to world space.
Definition: FieldMapping.h:509
const MatrixCurve::SampleVec& MatrixFieldMapping::localToWorldSamples ( ) const
inline

Returns a vector of all motion samples for local to world transform.

Definition at line 400 of file FieldMapping.h.

401  { return m_lsToWsCurve.samples(); }
MatrixCurve m_lsToWsCurve
Time-varying local to world space transform.
Definition: FieldMapping.h:515
const SampleVec & samples() const
Returns a const reference to the samples in the curve.
Definition: Curve.h:103
void MatrixFieldMapping::makeIdentity ( )

Sets the transform to identity. This makes it functionally equivalent to a NullFieldMapping.

Definition at line 287 of file FieldMapping.cpp.

References Curve< T >::clear(), m_lsToWsCurve, and updateTransform().

Referenced by MatrixFieldMapping(), and setLocalToWorld().

288 {
290  updateTransform();
291 }
MatrixCurve m_lsToWsCurve
Time-varying local to world space transform.
Definition: FieldMapping.h:515
void updateTransform()
Updates the local to world transformation matrix.
void clear()
Clears all samples in curve.
Definition: Curve.h:107
virtual void MatrixFieldMapping::worldToVoxel ( const V3d wsP,
V3d vsP 
) const
inlinevirtual

Transform from world space position into voxel space.

Implements FieldMapping.

Definition at line 412 of file FieldMapping.h.

413  { m_wsToVs.multVecMatrix(wsP, vsP); }
M44d m_wsToVs
World space to voxel space.
Definition: FieldMapping.h:512
virtual void MatrixFieldMapping::worldToVoxel ( const V3d wsP,
V3d vsP,
float  time 
) const
inlinevirtual

Implements FieldMapping.

Definition at line 414 of file FieldMapping.h.

415  {
416  if (!m_isTimeVarying) {
417  m_wsToVs.multVecMatrix(wsP, vsP);
418  } else {
419  M44d wsToVs = m_vsToWsCurve.linear(time).inverse();
420  wsToVs.multVecMatrix(wsP, vsP);
421  }
422  }
Imath::M44d M44d
Definition: SpiMathLib.h:82
MatrixCurve m_vsToWsCurve
Time-varying voxel to world space transform.
Definition: FieldMapping.h:517
T linear(const float t) const
Linearly interpolates a value from the curve.
Definition: Curve.h:199
bool m_isTimeVarying
Stores whether the curve has more than one time sample.
Definition: FieldMapping.h:521
M44d m_wsToVs
World space to voxel space.
Definition: FieldMapping.h:512
virtual void MatrixFieldMapping::voxelToWorld ( const V3d vsP,
V3d wsP 
) const
inlinevirtual

Transform from voxel space position into world space.

Implements FieldMapping.

Definition at line 424 of file FieldMapping.h.

425  { m_vsToWs.multVecMatrix(vsP, wsP); }
M44d m_vsToWs
Voxel space to world space.
Definition: FieldMapping.h:509
virtual void MatrixFieldMapping::voxelToWorld ( const V3d vsP,
V3d wsP,
float  time 
) const
inlinevirtual

Implements FieldMapping.

Definition at line 426 of file FieldMapping.h.

427  {
428  if (!m_isTimeVarying) {
429  m_vsToWs.multVecMatrix(vsP, wsP);
430  } else {
431  M44d vsToWs = m_vsToWsCurve.linear(time);
432  vsToWs.multVecMatrix(vsP, wsP);
433  }
434  }
Imath::M44d M44d
Definition: SpiMathLib.h:82
M44d m_vsToWs
Voxel space to world space.
Definition: FieldMapping.h:509
MatrixCurve m_vsToWsCurve
Time-varying voxel to world space transform.
Definition: FieldMapping.h:517
T linear(const float t) const
Linearly interpolates a value from the curve.
Definition: Curve.h:199
bool m_isTimeVarying
Stores whether the curve has more than one time sample.
Definition: FieldMapping.h:521
virtual void MatrixFieldMapping::worldToLocal ( const V3d wsP,
V3d lsP 
) const
inlinevirtual

Transform from world space position into local space.

Implements FieldMapping.

Definition at line 436 of file FieldMapping.h.

Referenced by FieldGroup< BaseTypeList_T, Dims_T >::GetIntersections::intersectMatrixMapping().

437  { m_wsToLs.multVecMatrix(wsP, lsP); }
M44d m_wsToLs
World space to local space.
Definition: FieldMapping.h:506
virtual void MatrixFieldMapping::worldToLocal ( const V3d wsP,
V3d lsP,
float  time 
) const
inlinevirtual

Implements FieldMapping.

Definition at line 438 of file FieldMapping.h.

440  {
441  if (!m_isTimeVarying) {
442  m_wsToLs.multVecMatrix(wsP, lsP);
443  } else {
444  M44d wsToLs = m_lsToWsCurve.linear(time).inverse();
445  wsToLs.multVecMatrix(wsP, lsP);
446  }
447  }
Imath::M44d M44d
Definition: SpiMathLib.h:82
MatrixCurve m_lsToWsCurve
Time-varying local to world space transform.
Definition: FieldMapping.h:515
T linear(const float t) const
Linearly interpolates a value from the curve.
Definition: Curve.h:199
bool m_isTimeVarying
Stores whether the curve has more than one time sample.
Definition: FieldMapping.h:521
M44d m_wsToLs
World space to local space.
Definition: FieldMapping.h:506
virtual void MatrixFieldMapping::localToWorld ( const V3d lsP,
V3d wsP 
) const
inlinevirtual

Transform from local space position into world space.

Implements FieldMapping.

Definition at line 449 of file FieldMapping.h.

450  { m_lsToWs.multVecMatrix(lsP, wsP); }
M44d m_lsToWs
Local space to world space.
Definition: FieldMapping.h:503
virtual void MatrixFieldMapping::localToWorld ( const V3d lsP,
V3d wsP,
float  time 
) const
inlinevirtual

Implements FieldMapping.

Definition at line 451 of file FieldMapping.h.

452  {
453  if (!m_isTimeVarying) {
454  m_lsToWs.multVecMatrix(lsP, wsP);
455  } else {
456  M44d lsToWs = m_lsToWsCurve.linear(time);
457  lsToWs.multVecMatrix(lsP, wsP);
458  }
459  }
Imath::M44d M44d
Definition: SpiMathLib.h:82
MatrixCurve m_lsToWsCurve
Time-varying local to world space transform.
Definition: FieldMapping.h:515
M44d m_lsToWs
Local space to world space.
Definition: FieldMapping.h:503
T linear(const float t) const
Linearly interpolates a value from the curve.
Definition: Curve.h:199
bool m_isTimeVarying
Stores whether the curve has more than one time sample.
Definition: FieldMapping.h:521
void MatrixFieldMapping::worldToVoxelDir ( const V3d wsV,
V3d vsV 
) const
inline
Todo:
Generalize and make time-dependent.

Definition at line 462 of file FieldMapping.h.

463  { m_wsToVs.multDirMatrix(wsV, vsV); }
M44d m_wsToVs
World space to voxel space.
Definition: FieldMapping.h:512
void MatrixFieldMapping::voxelToWorldDir ( const V3d vsV,
V3d wsV 
) const
inline
Todo:
Generalize and make time-dependent.

Definition at line 466 of file FieldMapping.h.

467  { m_vsToWs.multDirMatrix(vsV, wsV); }
M44d m_vsToWs
Voxel space to world space.
Definition: FieldMapping.h:509
void MatrixFieldMapping::worldToLocalDir ( const V3d wsV,
V3d lsV 
) const
inline
Todo:
Generalize and make time-dependent.

Definition at line 470 of file FieldMapping.h.

Referenced by FieldGroup< BaseTypeList_T, Dims_T >::GetIntersections::intersectMatrixMapping().

471  { m_wsToLs.multDirMatrix(wsV, lsV); }
M44d m_wsToLs
World space to local space.
Definition: FieldMapping.h:506
void MatrixFieldMapping::localToWorldDir ( const V3d lsV,
V3d wsV 
) const
inline
Todo:
Generalize and make time-dependent.

Definition at line 474 of file FieldMapping.h.

475  { m_lsToWs.multDirMatrix(lsV, wsV); }
M44d m_lsToWs
Local space to world space.
Definition: FieldMapping.h:503
void MatrixFieldMapping::extentsChanged ( )
virtual

Implement this if the subclass needs to update itself when the resolution changes.

Reimplemented from FieldMapping.

Definition at line 295 of file FieldMapping.cpp.

References updateTransform().

296 {
297  updateTransform();
298 }
void updateTransform()
Updates the local to world transformation matrix.
std::string MatrixFieldMapping::className ( ) const
virtual

Returns the FieldMapping type name. Used when writing/reading from disk.

Implements FieldMapping.

Definition at line 302 of file FieldMapping.cpp.

References staticClassType().

303 {
304  return std::string(staticClassType());
305 }
static const char * staticClassType()
Definition: FieldMapping.h:350
bool MatrixFieldMapping::isIdentical ( FieldMapping::Ptr  other,
double  tolerance = 0.0 
) const
virtual

Whether the mapping is identical to another mapping.

Implements FieldMapping.

Definition at line 309 of file FieldMapping.cpp.

References FIELD3D_NAMESPACE_OPEN::checkMatricesIdentical(), FIELD3D_NAMESPACE_OPEN::k_matrixMappingName(), m_lsToWsCurve, m_vsToWsCurve, and Curve< T >::samples().

311 {
313 
314  if (other->className() != k_matrixMappingName) {
315  return false;
316  } else {
317 
319  FIELD_DYNAMIC_CAST<MatrixFieldMapping>(other);
320 
321  if (mm) {
322 
323  const SampleVec lsToWs1 = m_lsToWsCurve.samples();
324  const SampleVec lsToWs2 = mm->m_lsToWsCurve.samples();
325  const SampleVec vsToWs1 = m_vsToWsCurve.samples();
326  const SampleVec vsToWs2 = mm->m_vsToWsCurve.samples();
327 
328  size_t numSamples = lsToWs1.size();
329 
330  // First check if time sample counts differ
331  // lsToWs and vsToWs are guaranteed to have same sample count.
332  if (lsToWs1.size() != lsToWs2.size()) {
333  return false;
334  }
335 
336  // Then check if all time samples match, then check localToWorld
337  // and voxelToWorld matrices
338  for (size_t i = 0; i < numSamples; ++i) {
339  if (lsToWs1[i].first != lsToWs2[i].first) {
340  return false;
341  }
342  if (!checkMatricesIdentical(lsToWs1[i].second, lsToWs2[i].second,
343  tolerance)) {
344  return false;
345  }
346  if (!checkMatricesIdentical(vsToWs1[i].second, vsToWs2[i].second,
347  tolerance)) {
348  return false;
349  }
350  }
351 
352  return true;
353 
354  } else {
355  return false;
356  }
357  }
358  return false;
359 }
const string k_matrixMappingName("MatrixFieldMapping")
MatrixCurve m_vsToWsCurve
Time-varying voxel to world space transform.
Definition: FieldMapping.h:517
MatrixCurve m_lsToWsCurve
Time-varying local to world space transform.
Definition: FieldMapping.h:515
const SampleVec & samples() const
Returns a const reference to the samples in the curve.
Definition: Curve.h:103
std::vector< Sample > SampleVec
Definition: Curve.h:85
boost::intrusive_ptr< MatrixFieldMapping > Ptr
Convenience typedef.
Definition: FieldMapping.h:341
bool checkMatricesIdentical(const Matrix_T &m1, const Matrix_T &m2, double tolerance)
virtual V3d MatrixFieldMapping::wsVoxelSize ( int  i,
int  j,
int  k 
) const
inlinevirtual

Returns world-space size of a voxel at the specified coordinate.

Implements FieldMapping.

Definition at line 484 of file FieldMapping.h.

Referenced by FieldGroup< BaseTypeList_T, Dims_T >::GetIntersections::intersectMatrixMapping().

485  { return m_wsVoxelSize; }
V3d m_wsVoxelSize
Precomputed world-space voxel size. Calculations may assume orthogonal transformation for efficiency...
Definition: FieldMapping.h:525
FieldMapping::Ptr MatrixFieldMapping::clone ( ) const
virtual

Returns a pointer to a copy of the mapping, pure virtual so ensure derived classes properly implement it.

Implements FieldMapping.

Definition at line 414 of file FieldMapping.cpp.

References MatrixFieldMapping().

415 {
416  return Ptr(new MatrixFieldMapping(*this));
417 }
boost::intrusive_ptr< MatrixFieldMapping > Ptr
Convenience typedef.
Definition: FieldMapping.h:341
void MatrixFieldMapping::updateTransform ( )
private

Updates the local to world transformation matrix.

Definition at line 363 of file FieldMapping.cpp.

References Curve< T >::addSample(), Curve< T >::clear(), getLocalToVoxelMatrix(), Curve< T >::linear(), m_isTimeVarying, m_lsToWs, m_lsToWsCurve, m_vsToWs, m_vsToWsCurve, m_wsToLs, m_wsToVs, m_wsVoxelSize, Curve< T >::numSamples(), and Curve< T >::samples().

Referenced by extentsChanged(), makeIdentity(), and setLocalToWorld().

364 {
365  typedef MatrixCurve::SampleVec::const_iterator SampleIter;
366 
367  // Build the voxel to world space transforms ---
368  M44d lsToVs;
369  getLocalToVoxelMatrix(lsToVs);
370  M44d vsToLs = lsToVs.inverse();
371  // Loop over all samples in lsToWs, append vsToLs and create new curve
372  // Also handle the special case where lsToWs has no samples. In that
373  // case m_vsToWsCurve still has to have one sample.
374  const MatrixCurve::SampleVec &lsToWs = m_lsToWsCurve.samples();
376  for (SampleIter i = lsToWs.begin(), end = lsToWs.end(); i != end; i++) {
377  m_vsToWsCurve.addSample(i->first, vsToLs * i->second);
378  }
379 
380  // See if the curve has more than just a single sample
382 
383  // Sample the time-varying transforms at time=0.0
385  m_wsToLs = m_lsToWs.inverse();
386  m_vsToWs = vsToLs * m_lsToWs;
387  m_wsToVs = m_vsToWs.inverse();
388 
389  // Precompute the voxel size
390  V3d voxelOrigin, nextVoxel;
391  m_vsToWs.multVecMatrix(V3d(0, 0, 0), voxelOrigin);
392  m_vsToWs.multVecMatrix(V3d(1, 0, 0), nextVoxel);
393  m_wsVoxelSize.x = (nextVoxel - voxelOrigin).length();
394  m_vsToWs.multVecMatrix(V3d(0, 1, 0), nextVoxel);
395  m_wsVoxelSize.y = (nextVoxel - voxelOrigin).length();
396  m_vsToWs.multVecMatrix(V3d(0, 0, 1), nextVoxel);
397  m_wsVoxelSize.z = (nextVoxel - voxelOrigin).length();
398 }
Imath::M44d M44d
Definition: SpiMathLib.h:82
size_t numSamples() const
Returns the number of samples in the curve.
Definition: Curve.h:99
M44d m_vsToWs
Voxel space to world space.
Definition: FieldMapping.h:509
MatrixCurve m_vsToWsCurve
Time-varying voxel to world space transform.
Definition: FieldMapping.h:517
MatrixCurve m_lsToWsCurve
Time-varying local to world space transform.
Definition: FieldMapping.h:515
M44d m_lsToWs
Local space to world space.
Definition: FieldMapping.h:503
void addSample(const float t, const T &value)
Adds a sample point to the curve.
Definition: Curve.h:172
Imath::V3d V3d
Definition: SpiMathLib.h:74
const SampleVec & samples() const
Returns a const reference to the samples in the curve.
Definition: Curve.h:103
T linear(const float t) const
Linearly interpolates a value from the curve.
Definition: Curve.h:199
void getLocalToVoxelMatrix(M44d &result)
bool m_isTimeVarying
Stores whether the curve has more than one time sample.
Definition: FieldMapping.h:521
std::vector< Sample > SampleVec
Definition: Curve.h:85
V3d m_wsVoxelSize
Precomputed world-space voxel size. Calculations may assume orthogonal transformation for efficiency...
Definition: FieldMapping.h:525
void clear()
Clears all samples in curve.
Definition: Curve.h:107
M44d m_wsToLs
World space to local space.
Definition: FieldMapping.h:506
M44d m_wsToVs
World space to voxel space.
Definition: FieldMapping.h:512
void MatrixFieldMapping::getLocalToVoxelMatrix ( M44d result)
private
Todo:
Unit test this

Definition at line 402 of file FieldMapping.cpp.

References FieldMapping::m_origin, and FieldMapping::m_res.

Referenced by updateTransform().

403 {
404  // Local to voxel is a scale by the resolution of the field, offset
405  // to the origin of the extents
406  M44d scaling, translation;
407  scaling.setScale(m_res);
408  translation.setTranslation(m_origin);
409  result = scaling * translation;
410 }
Imath::M44d M44d
Definition: SpiMathLib.h:82
V3d m_origin
The integer voxel-space origin of the underlying Field object. Is equal to field.extents.min.
Definition: FieldMapping.h:190
V3d m_res
The integer voxel-space resolution of the underlying Field object. Is equal to field.extents.max - field.extents.min + 1.
Definition: FieldMapping.h:193

Member Data Documentation

MatrixFieldMapping::DEFINE_FIELD_RTTI_CONCRETE_CLASS

Definition at line 348 of file FieldMapping.h.

M44d MatrixFieldMapping::m_lsToWs
private

Local space to world space.

Note
This is used only when m_lsToWsCurve has zero or one samples.

Definition at line 503 of file FieldMapping.h.

Referenced by updateTransform().

M44d MatrixFieldMapping::m_wsToLs
private

World space to local space.

Note
This is used only when m_lsToWsCurve has zero or one samples.

Definition at line 506 of file FieldMapping.h.

Referenced by updateTransform().

M44d MatrixFieldMapping::m_vsToWs
private

Voxel space to world space.

Note
This is used only when m_lsToWsCurve has zero or one samples.

Definition at line 509 of file FieldMapping.h.

Referenced by updateTransform().

M44d MatrixFieldMapping::m_wsToVs
private

World space to voxel space.

Note
This is used only when m_lsToWsCurve has zero or one samples.

Definition at line 512 of file FieldMapping.h.

Referenced by updateTransform().

MatrixCurve MatrixFieldMapping::m_lsToWsCurve
private

Time-varying local to world space transform.

Definition at line 515 of file FieldMapping.h.

Referenced by isIdentical(), makeIdentity(), setLocalToWorld(), and updateTransform().

MatrixCurve MatrixFieldMapping::m_vsToWsCurve
private

Time-varying voxel to world space transform.

Definition at line 517 of file FieldMapping.h.

Referenced by isIdentical(), and updateTransform().

bool MatrixFieldMapping::m_isTimeVarying
private

Stores whether the curve has more than one time sample.

Note
This is set by updateTransform().

Definition at line 521 of file FieldMapping.h.

Referenced by updateTransform().

V3d MatrixFieldMapping::m_wsVoxelSize
private

Precomputed world-space voxel size. Calculations may assume orthogonal transformation for efficiency.

Definition at line 525 of file FieldMapping.h.

Referenced by updateTransform().


The documentation for this class was generated from the following files: