Geometric Constraint Order / Priority Issues
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Hello,
To explain the problem is easier to describe the process I'm using with constraints.
First I am using constraints in an order of the Pallette in block editing, (Coincident, Perpendicular, Parallel, Tangent, Horizontal, Vertical, Colinear, Concentric, Smooth, Symmetric, Equal, Fix, followed by Dimensional Constraints)
I avoid using Horizontal, Vertical, same in dimensions, and fixed. Typically I don't use symmetric or smooth too often either. The reason to avoid those is they prevent the rotation action from being used.
The issue is I'll use coincident first, and when I do have a use for horizontal and vertical I find that it moves the "source" of coincident. When using ANY constraint it seems that the first object/point clicked is the one that things "move to" (Ex. A circle center coincident clicked first, the next click will move it to that center, but if you click something else first it'll move that circle or it's center to whatever you clicked first).
BUT, the issue is not usually on the first constraint, it's 2nd or 3rd that affect the first. Say you you have circles you don't want moved (relatively), but you want their centers to have drop-down lines that stay vertical with other objects/center lines colinear with when they rotate from the action. The idea is taking a top view to rotate the front view within a block, but when discovering the constraints having issues I had gone through about 10 different times being careful of the process and here's what I found.
After carefully Coincident Constraining line ends to the source points (circle centers), the next set of constraints are Colinear (typically works) but instead to just test if it's functional I used Vertical Constraint, which is necessarily the 3rd set but from the issues this was to see what the problem was. Half would move the source, the other half wouldn't, not the same half each time (it seems random). So I used 2 different layers and locked the circles, to find that an error of "layer locked" type would show in the command lines on the layers the Vertical Constraints wouldn't work for while the others did.
After that I tried redrawing the line, unlocking the layer to re-constrain the coincident on the ones that didn't work, then after locking the layer the issue is still there with those same points, but redrawing (or copying and pasting) the objects and starting this process over the issue happens again but with different spots/points.
