I have created a cylinder, selected both end caps and snapped the display so one is behind the other directly in front. Now, for these end caps I would like to select every other polygon and group visible those polygons. However, when I attempt to select I either do not select anything at all or I select two polygons.
Can someone please tell me if there is a quick way of doing this ?
Clayton
Clear any existing mask.
Try using Lasso mode and make sure PT Sel is off so only the polygon complete surrounded by the lasso is hidden.
Hide everythnig but what you want to select and then drag a mask over what is visible.
Unhide.
You may need to “Make Polymesh 3D” your cylinder because funning things can happen if change the initialization of pimitives.
Alternative: If the object is still a cylinder primitive (e.g. Make Polymesh 3D has NOT been used) then from the masking pallet try: Mask ALL, set sel to 1 and skip to 1 and try “col” and see if this give you what you want. Various settings of skip sel and skip will vary the effect. Just Mask ALL try another.
To hide the unmasked polygons, go to Visibility -> Hid Pt on the tool pallet.
-K
Thanks Kerwin, I did find a workaround to this problem (polymesh 3D) by selecting 4 polygons at a time (to form a cross shape) and performing a group visible on this. I then repeated the process a couple of times, each time forming a cross at different rotations ending up with three crosses as a selection. I was then able to group visible these to give me the selection I needed. Hope this makes sense !!!
One question though: Can you tell me where the sel, skip and col features are as I could not find them under R3 ?
Skp and Sel only show up on primitives (like “cube3D”, “cylinder3D”) but not on Polymesh objects (e.g. after the “Make Polymesh” button has been hit.) They’re on the masking tab of the tools pallet about 1/2 way down.
-K
Cheers Kerwin, after re-reading your reply I finally understand what you mean and now it’s even easier. Basically with pt-sel on I select one point (which selects two polygons), I then select the polygon I do not want and invert followed by Delete Hidden !
Many thanks
Clayton
Hi Kerwin,
I managed to get the col/skip to work using a mask to select the individual faces. I now want to be able to delete these permanently and convert it to a polymesh3D. Is there anyway to do this ?
The trick here is to save the mask. You do this by using the “Create Alpha” on the masking tab. This will make an alpha of the mask in terms of the default UV on the object. Do this while it is still a primitive.
Then make the primitive into a polymesh. To re-apply your mask, selected the alpha you saved, and select “Mask Alpha” from the masking tab.
Now you can go to the visibility tab of the tool pallet and use “HidePt”, this hides the unmasked portion of your polymesh. The hidden points are what will be deleted in the next step, so if you want the inverse to be deleted, use “Inverse” from the masking tab before “HidePt”.
Now, hopefully your object looks like you want. All we need to do is get rid of (permanently) those hidden polygons. This can be done by going to the geometry tab of the tool pallet and using “DelHidden”. Once this is done, all the hidden geometry is gone.
-K
Hi Kerwin,
I have followed your instructions, unfortunately this does not appear to work.
No mask appears to be applied. Do I need to do anything with UV’s here first ?
EDIT: I have tried to do a UVc and had limited success with this !