User:Plussai/GSoC 2012 log

< User:Plussai
Revision as of 10:46, 10 May 2012 by Plussai (talk | contribs) (8 May 2012)

7 May 2012

  • build the brl-cad svn on VM successfully.
  • build the brlcad-7.18.4 on windows(vs2005),but some link error occured from libtclcad.lib

8 May 2012

  • get familiar with the Brep structure.
    ON_CurveArray m_C2;//Pointers to parameter space trimming curves (used by trims)
    ON_CurveArray m_C3;//Pointers to 3d curves (used by edges)
    ON_BrepEdgeArray m_E;//edges
    ON_BrepFaceArray m_F;//faces
    ON_BrepLoopArray m_L;//loops
    ON_SurfaceArray m_S;//Pointers to parametric surfaces (used by faces)
    ON_BrepTrimArray m_T;//trims
    ON_BrepVertexArray m_V;//vertexs

9 May 2012

  • solve the link problem when build brlcad_18.4 in vs2005.(function go_init(..) undefinded)
  • understand some important point about NURBS. 3D NURBS is not tensor product surface,but it can be represented into tensor product surface by mapping 3D NURBS into 4D using homogeneous coordinate.(The NURBS BOOK page 30)
  • circle Arc can be represented by vector{(1,1,0,1),(1,1,1,1),(2,0,2,2)}in yz plane