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IDProjectCategoryView StatusLast Update
0033043CommunityOCCT:Meshpublic2022-07-06 07:19
Reportereryar Assigned Tooan  
PrioritynormalSeverityminor 
Status newResolutionopen 
PlatformWindowsOSVC++ 2015 
Product Version7.6.0 
Target Version7.7.0 
Summary0033043: Cannot display the result edge in 3d viewer when project circle on plane
DescriptionWhen use the following Tcl in Draw:
circle c 0 0 10 1 0 0 3
plane p 0 0 0 0 0 1
projonplane r c p

In Draw mu4 views can display the project curcle correctly, but can display nothing when to display the edge built from the project result curve:
mkedge e r
vdisplay e
TagsNo tags attached.
Test case number

Attached Files

  • draw.png (38,656 bytes)

Activities

eryar

2022-06-28 06:53

developer  

draw.png (38,656 bytes)

azv

2022-06-28 08:45

administrator   ~0109318

The problem is that the polygon representation of the edge has only 2 coincident nodes.
 -------
Dump of 1 Polygon3Ds
 -------
  1 : Polygon3D with 2 Nodes
with parameters
Deflection : 0.001

Nodes :
         1 :                 0                 0                 0
         2 :                 0                 0                 0

eryar

2022-06-29 11:12

developer   ~0109364

Yes, the project result is BSpline curve:
Draw[2]> dump r

*********** Dump of r *************
BSplineCurve
  Degree 8, 17 Poles, 3 Knots
Poles :

   1 : 0, 0, 0
   2 : 0, -1.17809724509617, 0
   3 : 0, -2.35620388376992, 0
   4 : 0, -3.25736798067373, 0
   5 : 0, -3.60539563891143, 0
   6 : 0, -3.25736798067192, 0
   7 : 0, -2.35620388376992, 0
   8 : 0, -1.17809724509617, 0
   9 : 0, -3.67394039744206e-16, 0
  10 : 0, 1.17809724509617, 0
  11 : 0, 2.35620388376947, 0
  12 : 0, 3.25736798067192, 0
  13 : 0, 3.60539563891507, 0
  14 : 0, 3.25736798066646, 0
  15 : 0, 2.35620388376947, 0
  16 : 0, 1.17809724509617, 0
  17 : 0, 7.34788079488412e-16, 0
Knots :

   1 : 0 9
   2 : 3.14159265358979 8
   3 : 6.28318530717959 9

But I think for this particular case, its better to use a Line.

Issue History

Date Modified Username Field Change
2022-06-28 06:53 eryar New Issue
2022-06-28 06:53 eryar Assigned To => msv
2022-06-28 06:53 eryar File Added: draw.png
2022-06-28 08:45 azv Assigned To msv => oan
2022-06-28 08:45 azv Category OCCT:Modeling Algorithms => OCCT:Mesh
2022-06-28 08:45 azv Note Added: 0109318
2022-06-29 11:12 eryar Note Added: 0109364
2022-07-06 07:19 azv Target Version 7.6.3 => 7.7.0