FEDEASLab

Geometry > q2Rmat

q2Rmat

Purpose

determine rotation matrix from normalized quaternions

Synopsis

R = q2Rmat (qhat)

Description

Q2Rmat determine rotation matrix from normalized quaternions
  R = Q2RMAT (QHAT)
  the function determines the rotation matrix R from the normalized
  representation QHAT of a rotation

Cross-Reference Information

This function calls:

  • spin determine the spin tensor of a vector
This function is called by:
  • Coro3dKinematics determine deformations and kinematic transformation matrices
  • DefGeom_3dFrm determines current length and corotational triad of 2-node, 3d frame element
  • GeomTran_QuadPlate kinematic matrices and local displacements for a quadrilateral plate element
  • GeomTran_TriPlate kinematic matrices and local displacements for a triangular plate element
  • Large3du2ul_Quad determine the local displacements of a triangular element
  • Large3du2ul_Tri determine the local displacements of a triangular element
  • Large3du2v_Frm determine 3d frame element deformations from end displacements
  • kg_QuadPlate geometric stiffness matrix for quadrilateral plate element for different options
  • kg_TriPlate geometric stiffness matrix for triangular plate element for different options