V8 file format & global origin

Hi,

We are currently performing testing for the V7 to V8 upgrade
(finally!!) Looking at files that were migrated from V7 to V8, they
have retained the exact same global origin values, which I guess is a
good thing. My GO=$ values are GO=1147483,-10852516. However, if the GO
is still the distance from 0,0 to the lower left corner of the design
plane, this means that coordinate 0,0 is off the design plane. This
does not appear to be the case though, as I hvae modeled in this design
file to coordinates 0,0 without a problem.

Question 1 - is the GO just retained for backward compatibilty and for
aligning reference file attachments?

Question 2, depending on answer to #1, how do you determine the MinX,
MinY, MaxX MaxY values of a V8 design plane (Or even just the centroid,
since I have the Working Area size from the Design Settings)? For V7,
there was this nifty calculator online
http://www.geocities.com/tshoemaker/.

Thanks for any insight,

-Scott

 

Scott:

The MSTN V7 design plane/volume that is made of a predetermined fixed
number of location points is not the same in V8. My understanding of the
size of the 3D plane/volume of a V8 design file is a result of the range
of sizes in scientific notation that may be entered to locate data points.

MSTN can record location numbers for each location of xyz coordinates in
the following format:

The number itself may be of 99 digits, and it may have a decimal point
and be signed +/-. The number may also be raised to a power. The number
of the power may be of 99 digits, and it may have a decimal point and be
signed +/-. (I don't know if the decimal point and sign use up 2 of the
99 digits.)

These numbers can be placed as X,Y,Z values to represent selected locations.

That means that in the same drawing gigantic celestial objects may be
drawn at a precision that can also be used to draw subatomic sized
objects - all with no reduction of the size of the design plane/volume
or the accuracy of precision.

You can still relocate the GO and WO values - as long as the numbers
used have a number of digits that is smaller than the limiting number
format. (All demonstrated numbers are particular and finite.)

Placing the GO in the max corner of the design volume would mean that it
is really far away, numerically speaking. Of course, if it is set to be
GO=0,0,0 the huge max volume would be eight times the size.

V8 will be very useful in geodesically mapping the Moon with great
precision, or in simultaneously designing nano widgets.

Ralph Hertle