|
22nd March 2015, 03:32 PM | #1 |
Member
Expert member
Join Date: Feb 2012
Posts: 58
|
baloney slices the other way,
well starting from scratch with the the line drawings of the ship, I can build the sections, but its long and laborious. I was hoping to be able to convert from existing sketchup easier:
|
24th March 2015, 08:38 AM | #2 |
Administrator
Professional user
Join Date: Jun 2003
Posts: 4,565
|
Re: baloney slices the other way,
Do you mean convert from Sketchup? If so, you should be able to export .obj and import it into AC3D.
If you have a series of line profiles, you can use the convex hull (Vertex->Create-convex surface/object) to make surfaces over a shape (note that it works convexly, so for concave shapes, you may need to do it in parts and delete extra surfaces that are created). |
24th March 2015, 09:13 AM | #3 | |
Member
Expert member
Join Date: Feb 2012
Posts: 58
|
Re: baloney slices the other way,
Quote:
yes I can do that no problem using .dae, my issue is the polygon count is out of control, I need it to be far less. I really want bascially a bunch of conic sections the top and bottom being just a single polygon, and the sides just a wrap of the two polygons. In its simpilest form, a cylinder, you end up with 3 "polygons" 2 circles, and a rectangle that wraps around the edges of the circle. If you look at my picture, you can see that is what I've done for my thick "baloney" slices. "If you have a series of line profiles, you can use the convex hull (Vertex->Create-convex surface/object) to make surfaces over a shape (note that it works convexly, so for concave shapes, you may need to do it in parts and delete extra surfaces that are created)" this sounds very interesting and I would love to see a tutorial or video on this technique, is there one available or can you give some more step by step instructions? as you can see in the attached pictures, doing it by hand is not coming out too well for the bow... |
|
24th March 2015, 12:33 PM | #4 |
Administrator
Professional user
Join Date: Jun 2003
Posts: 4,565
|
Re: baloney slices the other way,
It's looking great from here.
The convex hull function creates surface around a selection of vertices. Imagine a balloon having the air let out of it, over a load of points - it will shrink until it can't any more. Any 'internal' points are not used to make the shape but any that touch the 'balloon' will define the outside of the new surfaces. There's an example in the manual - access this from the Help menu inside AC3D. see Operations on Vertices->Create-convex surface/object. |
24th March 2015, 01:59 PM | #5 | |
Member
Expert member
Join Date: Feb 2012
Posts: 58
|
Re: baloney slices the other way,
Quote:
thanks, but its all trial and terror... its very time consuming and I was hoping for a faster way of doing it. currently I trace the baloney slice in 2d with the multi-point poly shape, then extrude and then drag the points of the new polyside down to the new baloney slice. However this isn't very smooth and I then have to do a lot of tweaking to round everything. I was hoping the Vertices->Create-convex surface/object will be faster without adding polygons. |
|
24th March 2015, 02:28 PM | #6 |
Administrator
Professional user
Join Date: Jun 2003
Posts: 4,565
|
Re: baloney slices the other way,
Create a new line over each section of the bitmap and position these along the hull until you have a 'vertex skeleton'.
In vertex mode, you can select two of the lines and use the convex function. That will form a shape around the vertices. Switch to Surface select mode (press 's' and 'v' to switch modes, it's a bit quicker) then select and delete any extra surfaces - mostly from the front, back and top. The keel is concave so you'll need to do these sections in more than one go. Actually it might be better to select the vertices in horizontal slabs. You may be able to make the majority of the shape in one go - apart from the concave section. |
|
|