Cartesian Distance

[[je...]]

This is a newbie question. What is the proper order to select features for a cartesian distance? I thought the first feature selected is the primary and the second is referenced from the first.

[[Cl...]]

I don't think it matters. I would Pull the two features in, note the result, and then reverse their order to see if there is a difference.

[[je...]]

There's about a .010" difference.

[[Cl...]]

Are they two planes?

[[SH...]]

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https://youtu.be/95eUwyPyAVM

[[Da...]]

In my experience with cartesian distance between 2 points, the order the points are selected should not matter. However, items 3 and 4 could make a difference as they create an alignment.

But yes, if you are measuring between 2 planes, you would be measuring from the centroid of the second plane perpendicular to the first. Unless those planes are perfectly parallel, I would expect a shift in the measurement when you change the primary.

[[je...]]

I'm measuring from plane1 to plane2. I get approximately .107 when I select features in that order. When I select plane2 first I get around .116. I can verify the .116 with a height gage. I've been using Calypso for 15 years and haven't run in to this. I upgraded to Calypso 2020 a couple of weeks ago...

Capture.PNG

[[Ja...]]

I always select the smaller plane first. Cartesian distance between two planes is a the length of a straight line perpendicular to the second feature to the center point of the first feature. If you pick the large feature first it will be the center point of the larger plane perpendicular to the small plane projected out to that location which can throw things out. Construct a perpendicular using both methods and you will see the difference. This is frustrating for me because it is opposite on my vision machines. I am used to picking the larger feature first and almost told you opposite of what Calypso does. Hopefully no one read this post before I deleted and fixed it.

[[Gr...]]

One thing I have done successfully was to Open>Features>Point Then do a Recall Feature Points for each plan. Then I would go to Form and Location>Distance>Simple distance and select the points that were created. It does not matter which you select first or second the results are the same (see attached)

[[Me...]]

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+1 for that, second element is the reference, really frustrating !!!

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Take care, recalling feature poing will gave the barycenter of the plane but outlier points won't be removed.

Guillaume

[[Tr...]]

I was told the 2nd sets direction, that if your doing point to plane that point should always be first. try changing your plane 2 to a single point.

point.PNG

[[Th...]]

If you are using Calypso 6.4 or above you can try the feature "Caliper Distance". It's a mixture of cartesian and simple distance and you can try if minimum, maximum or center is best - for both elements. 😃