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order you set the 3 measurement points (from left to right it will. LenB (vlax-curve-getDistAtParam 3DplB (vlax-curve-getEndParam 3DplB))ģDpl1 (if (here<, could be made for 3DPolylines. The Vessel module workflow includes sub modules for Centerline and Curved MPR and. The issue is regarding how this Measure-Command cmdlet manages output to the console of the messages. LenA (vlax-curve-getDistAtParam 3DplA (vlax-curve-getEndParam 3DplA)) Limitations Dimension objects are vulnerable to the 'topological naming problem'. After the link operation is completed the Data MeasureType property of the dimension changes from Projected to True. (= (cdr (assoc 100 (reverse (entget (ssname ss 1))))) "AcDb3dPolyline") Select one or more Dimensions to be linked to the selected 3D geometry. (= (cdr (assoc 100 (reverse (entget (ssname ss 0))))) "AcDb3dPolyline") Imperial measurement system: The drawing uses internal default. (prompt "\nTo draw a Center-Line between two 3D Polylines,") Enter System Variables on the Command Line. This will add spurious line segments to the animation if the points in the line segments were not ordered in a contiguous manner when digitized. (defun C:3DCL (/ ss 3DplA 3DplB lenA lenB 3Dpl1 3Dpl2 n vert1 pt2) If attempting to animate a layer of MultiLineStrings, this tool will combine the points from all line segments into a single line of points. I thought of having it find the nearest vertex, but that could cause trouble where there isn't one close to across-the-road.īut if that's close enough for you, it does follow the Z-coordinate variability in the 3D-ness of the source Polylines. Where the shorter one that it's stepping along is the lower red one, the dotted line is reaching across to the closest point on the longer one above, and the vertex on the new 3DPolyline is the midpoint between those locations, not the midpoint between roughly-across-from-each-other vertices. At the left end, it does this because of the little perpendicular leg:Īnd since it finds the closest point on the across-the-road 3DPolyline, not necessarily the closest vertex across the road, this kind of thing happens: (using the Enlarge command in ImageJ) to ensure accurate measure of the line. Check the regression graph for precision. DiameterJ: A validated open source nanofiber diameter measurement tool. It doesn't account for places where there isn't a vertex on the shorter one approximately "lined up with" or "across from" one on the longer one, but in the sample drawing, there's only one such location, and in a pretty straight stretch, so the effect on the result is minimal. Identify which point group includes the surveyed centerline points. This traces along the shorter of the two 3DPolylines selected, and at each vertex, finds the closest point on the other one, calculates the point halfway between them, and it draws a 3DPolyline through the halfway-between locations. Well, I thought of something, though it may not be quite what you need.
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