find overlapping lines with Python

[Danielm103]

AcGeCurveCurveInt3d is the tool that does all the heavy lifting, works on any curve type

https://help.autodesk.com/view/OARX/2025/ENU/?guid=OARX-RefGuide-__MEMBERTYPE_Methods_AcGeCurveCurveInt3d

import traceback
from pyrx_imp import Rx, Ge, Gi, Db, Ap, Ed

@Ap.Command()
def doit():
    try:
        filter = [(Db.DxfCode.kDxfStart, "*LINE")]
        ps, ss = Ed.Editor.selectPrompt("Add lines: ", "Remove lines: ", filter)
        if ps != Ed.PromptStatus.eOk:
            raise RuntimeError("Selection Error! {}: ".format(ps))
        curves = [Db.Curve(id) for id in ss.objectIds()]
        for crv1 in curves:
            for crv2 in curves:
                if crv1 == crv2:
                    continue
                gec1 = crv1.getAcGeCurve()
                gec2 = crv2.getAcGeCurve()
                cci = Ge.CurveCurveInt3d(gec1, gec2)
                for idx in range(cci.overlapCount()):
                    iv1, iv2 = cci.getOverlapRanges(idx)

                    # just draw a line showing the overlap
                    Ed.Core.grDraw(
                        crv1.getPointAtDist(iv1.lowerBound()),
                        crv1.getPointAtDist(iv1.upperBound()),
                        1,
                        0,
                    )
    except Exception as err:
        traceback.print_exception(err)

 

Edited February 4, 2025 by Danielm103