Commit Graph

5 Commits

Author SHA1 Message Date
Gael Guennebaud
f52d119b9c Solve a big issue with data alignment and dynamic allocation:
* add a WithAlignedOperatorNew class with overloaded operator new
* make Matrix (and Quaternion, Transform, Hyperplane, etc.) use it
  if needed such that "*(new Vector4) = xpr" does not failed anymore.
* Please: make sure your classes having fixed size Eigen's vector
  or matrice attributes inherit WithAlignedOperatorNew
* add a ei_new_allocator STL memory allocator to use with STL containers.
  This allocator really calls operator new on your types (unlike GCC's
  new_allocator). Example:
  std::vector<Vector4f> data(10);
  will segfault if the vectorization is enabled, instead use:
  std::vector<Vector4f,ei_new_allocator<Vector4f> > data(10);
NOTE: you only have to worry if you deal with fixed-size matrix types
with "sizeof(matrix_type)%16==0"...
2008-09-03 00:32:56 +00:00
Gael Guennebaud
9c450a52a2 Split Rotation.h to Rotation2D.h and RotationBase.h,
and more code factorization based on RotationBase.
Added notes about the main aim of the Translation and Scaling classes.
2008-08-30 21:36:04 +00:00
Gael Guennebaud
6ba991aa3a * added a RotationBase class following the CRT pattern
This allow code factorization and generic template specialization
  of functions
* added any_rotation * {Translation,Scaling,Transform} products methods
* rewrite of the actually broken ToRoationMatrix helper class to
  a global ei_toRotationMatrix function.
2008-08-30 20:11:04 +00:00
Gael Guennebaud
236b7a545d update Transform::inverse() to take an optional argument stating whether the transformation is:
NonAffine, Affine (default), contains NoShear, contains NoScaling
that allows significant speed improvements. If you like it, this concept could be applied to
Transform::extractRotation (or to a more advanced decomposition function) and to Hyperplane::transformed()
and maybe to some other places... e.g., I think a Transform::normalMatrix() function would not harm and
warn user that the transformation of normals is not that trivial (I saw this mistake much too often)
2008-08-30 12:42:06 +00:00
Gael Guennebaud
9e7a9cde14 Add Scaling and Translation class as discussed on ML, still missing:
* handling Quaternion, AngleAxis and Rotation2D, 2 options here:
 1- make all of them inheriting a common base class Rotation such that we can
    have a single version of operator* for all the rotation type (they all get converted to a matrix)
 2- write a version for all type (so 3 rotations types * 3 for Transform,Translation and Scaling)
* real documentation
2008-08-30 00:08:23 +00:00