Maya for 3D Printing - Rapid Prototyping
In this course we're going to look at something a little different, creating technically accurate 3D printed parts.
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136
27-10-2011
, 10:20 AM
Lead Modeler - Framestore
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No, voodoo-wise I generally like to share if I find anything, though the 'supporting' loop approach on corners, I actually kept to myself (as did daverave lol) for a while, though I have tried and tested it successfully on the last film I led the team on....and we didnt have any probs - even for the small budget we had. In fact we had to keep the geo down as best possible as the scale and the amount of digital assets was insane LOL. So that loop trick was really handy. I look forward to sharing that work with you guys in the new year, as I have screen grabs of wires and AOs ready to go, you just gotta wait unfortunately.
With the secondary details, if I can get away with not smoothing and get them in then I'll do it regardless. Theres always a way LOL. Also with this landing gear area despite have the orthos, I felt doing a planar projection was a better way to go, to get a better idea how the geo would sit.
YES...the stack in Max is a godsend. I started out on 3d Max R4 back in 96/97 and remember it from then, you could just go back to that point, and rework that piece with no real interuptions on the mesh, just whats needed I think in Maya's modelling...
Jay
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137
27-10-2011
, 10:28 AM
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I still hate the new interactive split poly tool though.
Regards
Gary
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138
27-10-2011
, 10:36 AM
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mmmm intrigue!!!
J
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139
27-10-2011
, 01:24 PM
EduSciVis-er
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Not to hijack this thread.
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140
27-10-2011
, 01:31 PM
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J
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141
01-11-2011
, 06:08 PM
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I use bevel and then add an edge to each corner to get rid of the nGon and Tri.
I can post a vid if anyone want to see it.
Sorry for hi-jacking the thread.
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142
01-11-2011
, 06:40 PM
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I have used two approaches for to solve this. The first one is the one Jay is using. Create an inset and then draw edges from the corner of the outer inset to either side of the corner of the inner inset (see my squiggly drawing labeled 1).
Sometimes the very acute angle causes problems (expecially if the entire mesh is to sparse). In those situations I find method 2 works better. Make two insets, then draw edges on either side of the inner inset perpendicular to the inner and middle edges and then bring those edges to the corner of the outermost inset and delete the middle edge forming the kite. This approach will often yield better results (see the scribble I labeled 2).
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 01-11-2011 at 08:19 PM.
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143
01-11-2011
, 07:44 PM
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I see what you are saying. The eight loops you mention (green on my pic) are not added they are part of the original mesh. The only loops I add after the bevel are the orange ones.
Curved objects do cause their own headaches but again I seem to be able to get a decent result.
Of course everyone has their own way of working just thought I'd share.
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144
01-11-2011
, 08:11 PM
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Look at the exhaust opening for instance on Jay's P-51. If the opening was inset and you did not already have the supporting edges they would have to be (a) added as in the example below or (b) you'd have to subdivide the mesh 2 times to create the supporting edges throughout the entire mesh! This quickly becomes very expensive and makes the mesh very dense and hard to work with.
Below is an example. You already have a surface and you want to make an inset section highlighted on the bottom image.
In the middle image you see the inset and the 4 edges loops that have to be added to support the corners.
On the top you see the faces that have been created throughout the entire model.
And in the second image you see the crease now created running the length of the surface.
To create the mesh such that you have the support edges available means you'd have to subdivide the mesh at least two times which starts to create very heavy geometry. Which become more complicated if you want to add in more openings in other places.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 01-11-2011 at 08:28 PM.
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01-11-2011
, 09:06 PM
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Yes I see what you are getting at. I didn't see Jays example just the ones that followed which all show the extrude within existing geo.
Regards
Gary
Last edited by clearairstudios; 02-11-2011 at 12:42 PM.
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146
02-11-2011
, 09:49 AM
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cheers
Jay
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02-11-2011
, 11:56 AM
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148
02-11-2011
, 01:25 PM
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All the stuff Rick mentioned is all valid so anyone reading the thread take note......!!!
I dont mind the thread hijack by the way....as long as its relevant info carry one. We can always link some of this stuff to the topology thread in the lounge.
Jay
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149
02-11-2011
, 03:15 PM
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The method that Jay and Dave have shown is the best for the irregular shape cut outs like the fuselage panel that don't follow the exiting geo, its also important to space the edges evenly on the hole, as Jay has done, so they influence the corners evenly all round the hole.
For the corners I do a bevel and keep it in the history so I can increase or decrease the sharpness of the corner.
In pic one 1 & 2 are created using my usual method 3 & 4 using the method Jay has used.
Pic two shows the method I use un-smoothed using the bevel tool. Again I keep the history so I can tweak the edges.
Thanks to Jay and Rick for the tips, really useful.
Regards
Gary
Last edited by clearairstudios; 02-11-2011 at 03:34 PM.
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150
03-11-2011
, 01:21 PM
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SplitPolygonTool
that will give you the old tool back.....in 2012
Jay
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