Hi,

brlcad has left the following comment at Create a precise modeling transcript for modeling a simple toy car https://www.google-melange.com/gci/task/view/google/gci2014/5897155285876736:


precision


Vladimir,

That looks better! Much better. But I noticed one more problem... Is that level of precision really necessary? That is, all the digits after the decimal points?

You should only include the precision that is actually useful. For example, with the s6 object, can "in s6 rcc 2767.4240846610855 -2273.8011132232987 1361.4731033087728 0 0 377.91746131285214 275.72984620547697" be reduced to:

in s6 rcc 2767 -2273 1361 0 0 377 275

Or even better still, can it be reduced further like this?

in s6 rcc 2800 -2300 1400 0 0 380 280

Make sense? The simpler the better. Of course, you don't want to change the model drastically, but if it can be described with fewer significant digits (eg, just 2 or 3 digits before the zeros), the easier it will be to input and understand.

At a minimum, you shouldn't need more than 5 digits precision. Eg, 2767.42408... becomes 2767.4 and 894.776262... becomes 894.78 etc. but you can probably get away with 2 or 3.


Greetings,
The Google Open Source Programs Team


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