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occt/tests/bugs/modalg_6/bug27269
nbv 3306fdd954 0029807: [Regression to 7.0.0] Impossible to cut cone from prism
The algorithm has been improved for the cases when the intersection line goes through the cone apex.

<!break>

1. All special points are put to the ALine forcefully (if they are true intersection point). Currently this step has not been implemented yet.

2. Now the tolerance of IntPatch_Point (put into ALine) is computed in order to cover the distance between it and the correspond ALine.

3. Test cases have been created.

4. Procedure of trimming IntAna_Curve has been improved.

5. Criterion when the discriminant of IntAna_Curve can be considered to be equal to 0 has been improved.

6. Methods IntAna_Curve::FindParameter(...) (and IntPatch_ALine::FindParameter(...)) currently returns list of all parameters corresponding the given point (IntAna_Curve can be self-interfered curve). Before the fix, this method always returned only one (randomly chosen) parameter.

7. Interfaces of the following methods have been changed: IntAna_Curve::FindParameter(...), IntPatch_ALine::FindParameter(...), IntPatch_ALine::ChangeVertex(...), IntPatch_SpecialPoints::AddPointOnUorVIso(...), IntPatch_SpecialPoints::AddSingularPole(...), IntPatch_WLineTool::ExtendTwoWLines().

8. Following methods have been added: IntAna_Quadric::SpecialPoints(...), IntPatch_ALineToWLine::GetSectionRadius(...), IntPatch_SpecialPoints::ProcessSphere(...), IntPatch_SpecialPoints::ProcessCone(...), IntPatch_SpecialPoints::GetTangentToIntLineForCone(...).

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1) tests/boolean/volumemaker/C5
   tests/boolean/volumemaker/C6
   tests/boolean/volumemaker/E7

They are real IMPROVEMENTS. In the FIX (in compare with MASTER), section result between pairs of faces f2&f6 (C5), f3&f7 (C6) and f1&f5 (E7) is closed. Separated test cases have been created in order to focus on the problem with section. Bug #28503 has been fixed.

Correction in test cases.
2018-07-06 15:52:48 +03:00

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puts "============"
puts "OCC27269"
puts "============"
puts ""
###############################
## Intersection algorithm produces null-length curve
###############################
restore [locate_data_file bug27267_cmpd.brep] a
explode a f
smallview
don a_7; fit
disp a_1
#############################
set log [bopcurves a_1 a_7 -2d]
#############################
regexp {Tolerance Reached=+([-0-9.+eE]+)\n+([-0-9.+eE]+)} ${log} full Toler NbCurv
for {set i 1} {$i <= ${NbCurv}} {incr i} {
bounds c_$i U1 U2
dump U1 U2
if {[dval U2-U1] < 1.0e-20} {
puts "Error: Wrong curve's range!"
}
set le [length c_$i]
regexp "The length c_$i is +(\[-0-9.+eE\]+)" ${le} full ll
if { $ll < 1.0e-7 } {
puts "Error: Curve c_$i is too small!"
}
}
checkview -screenshot -2d -path ${imagedir}/${test_image}.png