Effect of meshes on save time Rhino V5 v V7

Rhino Rhino for Windows
21

Hi,
OMG, that bolt came from a suggested website for getting hold of pre-drawn bolts !
McMaster Carr.
No warnings it had such excessive structure. Of course I then needed 4 of them, making it worse.

Never thought a bolt caused mayhem.

I delete those bolts from ‘Bearers V5 less holes’ the 792mb file, to see effect, save file and get 338Mb, takes 30 secs to save.

Still very bad, so whats wrong ?

Please try that.

why however as I exported the items out to rid the file of mesh and any gremlins assoc with it, did the file go from 557 to 792 MB ?

I will go back to drawing bolts by hand !

Is there a command to take a bolt and redraw it with the basic minimum of surfaces etc ?

That site was useful but caused all this thereafter.

Not sure what dupes I have, i will explore. I run seldup and see items I need, like the two walls of the channel.

I am cloning one bearer to make a differing one from, and those dupes are needed.

but what of the hole cutting cylinders, I cant use BlockInstances as they dont cut anything.

even holes cut will slow down rhino as they are perfect dupes, but one cannot blockInstance a hole, can one ?
I discovered this when creating aircraft, as soon as I cut all the rivet holes to make something look the part, it went exceptionally slow.

In this bearer though I want to show what it looks like, so little X’s for holes is no use to me at all.
One wouldnt draw a landscape and put in T for tree and L for leaf !

Is it the hole cutters and holes, cannot be as I got rid of the cylinders and it went to 792Mb.

Still not sure.

I am copy pasting my items out to a new file, saving and studying file size as I go, and so far its only 5.8Mb and I have the images I need and structures.

I still dont understand those files sent, and why less became more., and why less those bolts is still 338MB. and saves very slowly and rotates sluggish etc.
Steve

22

Hi Steve -

You are missing the point. There is nothing wrong with those models. It’s the settings for display mesh creation in your file that is causing the excessive amount of triangles.

Just one single bolt head goes from being 111 MB to 248 KB when you change your mesh settings from your custom settings to Smooth and Slower.
-wim

23

And to underline the point of how your custom render mesh settings at the document level affect the file size, setting it to Smooth and Slower, then resaving your file brings it down to 37MB, with all the duplicates left in place.

Your file RAF Bomb Trolley Bearers v6b del material and cylinder cutters basis no mesh inches.3dm goes from 800+MB to 17.6MB…

24

Hi,
I think you refer to properties?mesh where I go with default settings, BUT the circles and radiused corners have a faceted effect , no good for showing a client, and at times I cant see a correct fill for when working on the file and so found angle .35 sorted that, all other settings as default.

is it the simple change of angle from 0 to .35 causing mayhem ?

I have just made that again in another file as my radiused corners to a steel plate looked incomplete and odd and holes were octagons.

Steve

25

Most likely - that is a ridiculously fine setting. That will cause for example any circular opening to have more than 1000 facets (and therefore 1000 associated mesh faces). A more normal setting might be around 15° - circles will have minimum 24 facets. For very small circles (and other radii) that is largely sufficient, for larger circles/radii you combine it with something like the max distance edge to surface and minimum grid quads settings to get more facets on larger (flatter) radii.

You might want to read up on Rhino’s mesh settings in the online Help as well as here: Rhino Mesh Settings [McNeel Wiki]

26

Here is a visual example:

image
image1755×569 158 KB

(in wireframe mode in order to see mesh wires)
So you can see that your setting has almost 16 times as many mesh faces as does the “moderate” setting of 15° for angle.

MeshExampleV5.3dm (3.4 MB)

27

Looks like we have two ways to look on the initial issue - reducing the data and think about save time.

Since I have problems with the save time to I would say forget the data side of the issue since we will have projects with a lot of data which can be striped down.

@Steve1 For your file with 54s save time - how long is the save time if you use ‘incremental save’ instead ‘save’? For my current heavy project the save time dropped down from 8min(!) to 40s.

28

Hi,
where is setting in V5 to turn off compression when saving ?
where is incremental save setting ?
saves are about 90 secs on this 1.2Gb file, has three meshes (obj and assoc jpg texture.)
Its awful. rotate in perspective mode is jerky, and slow.

Steve

29

This has been answered before - there isn’t one.