Move the model to world origin and rotate it to north

Comments

• bernd

  January 7

  My question in the regard of simple moving is still valid.
  But I may foud why it was not 0,0,0 I moved too. ... I did not move the objects to the real world coordinate origin. On model open Bonsai set a temporary offset.

  

  found this ... https://community.osarch.org/discussion/2891/blender-offset-coordinates But they did not answer how to get rid of the temporary offset.

  Eventually I would like to move the model to the real origin. Since all objects in the model are on this huge coordinates it makes sense to move them.
• bernd

  January 7

  Mhh Bonsai does even know the north rotation ... Which would mean I would need to move all objects including the axis and rotate them according the Temporary Offset and the True North to have them on world coordinates origin. I have no idea how to do this in blender.
  
• bernd

  January 7

  Next found. All patched IFC really had the objects on this huge coordinates, but the original one not. If I use the original one I was able to set the offset in the ifc directly ...
  #39= IFCCARTESIANPOINT((2694428367.86,1227480510.83,628513.01));
  in the ifc and set it to
  #39= IFCCARTESIANPOINT((0.,0.,0.));

  
• bernd

  January 7 edited January 7

  But it does not wor for the true north. If I set
  #11= IFCDIRECTION((0.503864404155894,0.863782763329199));
  to
  #11= IFCDIRECTION((0.,1.));
  the True North in the panel is gone like the offset. But the model is still turned in the view. Means the geometry seams to be really turned in the ifc. Means I would need to turn the geometry and the axis
  
• bernd

  January 7

  I should have read this before posting so often … https://docs.bonsaibim.org/guides/authoring/advanced_modeling/georeferencing.html

  
• zoomer

  January 7 edited January 7

  @bernd said:
  I should have read this before posting so often … https://docs.bonsaibim.org/guides/authoring/advanced_modeling/georeferencing.html

  Yes, these wrong uneven 1/100's of Millimeters, in Blender term, means really "nearly 0,00"
  I think that is unavoidable if you later try to correct a geolocated Model manually in Blender. Once you have loaded it far away from origin, the rounding issues and inaccuracies are already in your geometry coordinates.

  It is important to load/import properly georeferenced Models from the beginning.
• steverugi

  January 7

  @zoomer

  It is important to load/import properly georeferenced Models from the beginning.

  yes!
  as much as possible when modelling buildings I set the intersection of gridlines A1 as 0,0 (World origin) and gridlines oriented as X,Y axis
  ..and use georeferencing to position it in real world along its rotation, plus elevation if relevant.

  
• Moult

  January 7

  I'd like to recommend using the SetFalseOrigin recipe. It basically says "make this XYZ coordinate the new 0,0,0, then make it map to this ENH".

  
• bernd

  January 8

  thanks for all the hints.
  How ist it possible to rotate and move the grid system? Select them and use grab or rotate does not do anything with them.
• steverugi

  January 8

  @bernd said:

  How ist it possible to rotate and move the grid system? Select them and use grab or rotate does not do anything with them.

  this is what I do:
  1. with Grids padlock open
  2. select all grids (IfcGridAxis) transform and save (IFC4)
  3. select all grids unlock Transform (holding Alt down to apply to all selected), transform and save (IF4x3)

  
• bernd

  January 9

  Found a better way in the regard of editing Grids.

  • open project in advanced mode
  • no elements will be loaded, but a panel with lots of advanced adjustments
  • there is Grids and right beside is a closed lock
  • open the lock and press Load Project Elements
  • make chaos by moving all Grids :-)
• bernd

  January 9

  @bernd said:
  Next found. All patched IFC really had the objects on this huge coordinates, but the original one not. If I use the original one I was able to set the offset in the ifc directly ...
  #39= IFCCARTESIANPOINT((2694428367.86,1227480510.83,628513.01));
  in the ifc and set it to
  #39= IFCCARTESIANPOINT((0.,0.,0.));

  somehow this only works in Blender in other viewer or CAD the model ist still on large coordinates.

  Open the file in advanced mode without offset and move all modell destroys the geometry.

  ATM I play with ifcpatch and recipe ResetAbsolutCoordinates.
• bernd

  January 9 edited January 9

  @bernd said:
  ATM I play with ifcpatch and recipe ResetAbsolutCoordinates.

  This is exactly what I need. In a few seconds the modell is saved nearly the world origin :-)
• bernd

  January 9

  Eventually after the ifcpatch I moved the model another few cm to the exactly Blender world origin, afterwards I rotated the model. Some help can be found here https://community.osarch.org/discussion/3298/rotate-in-blender

  In my CAD I would have done it in a few minutes, but the modell size went up from 8 MB to over 100 MB since all the stell profiles only imported and exported well as brep. This was not acceptable IMHO thus I used Bonsai. Eventually with success.