Comments (7)
Hi Bernard,
do you want to test sweeping along an alignment or would it be enough to test along any curve? I would propose a more generic curve for now just to test the concept itself because sweeping has not yet been finalized in RC2.
from sample-test-files.
Hi Bernhard,
you are correct, IfcAlignmentCurve
should not be used anymore.
Following the comment from Sergej, if you're using a simple line, it should be enough to check the concept of 3D swept geometry. The concept is not finalized, so there is no definitive answer yet to give. We still have open issues as to "what does sweeping along a IfcGradientCurve
mean".
In my opinion, one would link IfcGradientCurve
if you're sweeping along 3D, or IfcCompositeCurve
if you're sweeping along 2D.
from sample-test-files.
from sample-test-files.
In the future will it be possible to set a link to the semantic part of the alignment?
no, this is not planned (at least not directly), any geometric representation should be computable purely from its geometric definition. An open question: should we plan to have an INVERSE backpointer from the resulting curve to its hor/ver alignment definition in the semantic part.
from sample-test-files.
no, this is not planned (at least not directly), any geometric representation should be computable purely from its geometric definition. An open question: should we plan to have an INVERSE backpointer from the resulting curve to its hor/ver alignment definition in the semantic part.
I would support the inverse attribute for this, similar to IfcLinearPositioningElement attribute for axis. I'm not sure if it makes sense to change the base class for vertical and horizontal alignments (and cant) to to IfcLinearPositioningElement to reuse this attribute.
from sample-test-files.
Opinion: introduce a new Inverse, do not change the base class.
EDIT: moving the discussion about the possible inverse to the linked issue on IFC4.3.x-development repository.
from sample-test-files.
Closing, since the discussion moved to other repository.
from sample-test-files.
Related Issues (20)
- Merged #83 by mistake. One error needs to be fixed. HOT 2
- IfcPavement IfcCourse relation to IfcAlignment HOT 2
- Examples UT_DrainageSystem HOT 4
- IfcIntersectionCurve usage in AdvancedFace
- No data in the url for Drone Images and Videos
- Sample testfile with GPS coordinates HOT 6
- Import error HOT 1
- No database found error for majority of projects HOT 2
- Invalid representation context
- Esplan IFC4 demo model missing? HOT 1
- various big software vendors have problems parsing geographic-referencing.ifc HOT 4
- IfcGeomodel usage example in IFC format HOT 2
- Sample IFC files not passing the buildingSMART validation service
- Duplex model has no subcontexts
- IfcAlignmentHorizontalSegment - positive vs negative radii HOT 3
- IfcAlignmentVerticalSegment - Gradient is an IfcLengthMeasure? HOT 9
- IfcAlignmentVerticalSegment.StartDistAlong value documentation HOT 4
- IfcAlignmentVertical starts before and/or ends after IfcAlignmentHorizontal HOT 1
- Structure of IfcAlignment 4x3RC2 in the sematic and geometry part HOT 2
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