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what kind of function (#4665)
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andras1021  
#1 Posted : Saturday, February 2, 2013 3:59:21 AM(UTC)
andras1021

Rank: Junior Member

Joined: 1/28/2013(UTC)
Posts: 2
Hi there,

I am Andras and I am new to this forum. I have been using viacad 2D 3D v5 for quite some time and I have been rather happy with my progress. I am using it to build my own 3D print models.

I am now trying to build a train coach model with a round roof. I have tired to use solids but I do not think that the curves that are needed can be built using solids.

I attach a link to a coach with a similar roof that I have found on the internet:
http://www.railfaneurope.net/pi..._81_20-04_021-9_Str1.jpg

What kind of functions do you recommend for building such a struvture.

Many thanks

Andras


Now I am have one question which i do not
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Tem  
#2 Posted : Tuesday, February 5, 2013 2:20:41 AM(UTC)
Tem

Rank: Senior Member

Joined: 2/21/2007(UTC)
Posts: 386
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Hi Andras,
Welcome to the forum.
In the train car picture you have provided I see a combination of forms that have a simple round transition between them. If possible, can you find side and end views? These other views will improve your understanding of the roof form. Maybe, try utilizing surfaces to cut away unneeded material, remember the cutting surfaces must always extend past the solid or surface you are attempting to cut material away from.A simple profile could be extruded along the roof side, then use it as a cutting feature to remove a portion of the roof. repeat this technique for all sides as needed, then round the transitions.
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memphisjed  
#3 Posted : Friday, February 8, 2013 4:34:29 AM(UTC)
memphisjed

Rank: Senior Member

Joined: 12/19/2010(UTC)
Posts: 115

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extrude the dominant cross section, keep sharp edges between main arc and sides.
Use elliptical blend to dome ends, lots of error before trial and error yields right, then perform radial blend on top outside edge (radius wants to be small).
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