3D Truss Models
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@medeek said:
Another point worth noting is that a well designed truss or roof is already a thing of beauty, no further marketing gimmicks required.
Spoken like a true engineer!
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I've been slowing chewing away at the straight skeleton algorithm and still working out some of the kinks, there is a lot of logic dealing with how the rafters intersect various valleys and ridges. I will continue to hammer away at this over the next couple of weeks and hopefully have something to release by the end of November or sooner.
On a slightly different note I've been examining Vali Architects Instant Roof plugin and looking at how it generates gutters. Is this something that people would be interested in seeing added to the plugin?
I don't think it would be too much of a stretch to add this feature in.
I would probably start with the standard 5" K-style gutter where one could fine tune the dimensions within the global settings.
I'm assuming one would just want to draw this a surface and not a solid?
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I think you'd have to use as a surface to keep the polycount down. VA Roof plugin is very good and I use it especially for quickly adding the materials and features like gutters. The gutters and caps are not all that accurate,but OK for an overall building model. For ogee gutters I use my own geometry with Followme etc. I do not worry about having it open on top as it hardly affects the appearance of most views to the model and the solid shape is easier to work with. In sections, you might prefer it open for realism. I also add downspouts.
BTW I don't often use the actual roof forms of InstantRoof because I don't seem to have roof designs that work well. There's always something unusual about the roofs. I figure (since you go for accurate framing) your plugin has also solved the issue of accurate placement of the roof planes in relation to the plate height, which is my problem with most roof plugins.
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I don't think you should add in the gutters option, one can do that separately.
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I don't know if is something I will add in right away but it has been added to my list. I think that making the gutter a solid makes it easier to work with manually and that the top being covered or solid does not really affect the appearance detrimentally.
View model here:
3D Warehouse
3D Warehouse is a website of searchable, pre-made 3D models that works seamlessly with SketchUp.
(3dwarehouse.sketchup.com)
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I've been contacted by a truss designer who uses Mitek software. He wanted to know if there was a way to bring my truss models directly into the Mitek Engineering software. Apparently there is a .mxf file format that is already utilized by a Revit plugin to do this exact thing. If I can get the specifications of the .mxf file format I can probably setup an export feature which will allow the full truss assembly to be exported directly into Mitek. This would be convenient for the truss technician, eliminating some of his workload and manual entry.
I've contacted Mitek's support staff inquiring about the the .mxf file format and if they would entertain the idea of my plugin be able to transmit truss designs directly to their software.
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About a year ago I added some code into the plugin to phone home when a new installation occurs. This tells me the IP address (geographic location) of the installation as well some other data such as the plugin version number and whether or not it is the trial or full version.
Recently I have noticed a number of installations of the full version of the plugin that show a bogus version number (2.8.8) and they are all coming from China. The leads me to believe that the plugin has been hacked and possibly those hacked copies are being distributed but so far not widely.
I guess the upside is that if the hackers are trying to crack the program it must be worth their time and hence I've put together a fairly substantial product.
On the next release I will include some additional error checking which will hopefully thwart these would be hackers.
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@medeek said:
I guess the upside is that if the hackers are trying to crack the program it must be worth their time and hence I've put together a fairly substantial product.
Aaaah, a silver lining type of guy!
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Life is tough, you've got to find a silver lining somewhere.
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Gutters:
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The half round gutter type (U6):
These are probably the two most common gutter profiles but there are others that I can add if requested:
- box gutters
- fascia gutters
Even though I've listed these at the K5 and U6 gutter types, one can easily modify any of their dimensions to generate any size of these gutter types with the given profile. The reason I've named them with the sizes "5" and "6" is because the default values correspond to these sizes.
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Version 2.0.4c - 10.30.2017
This sub-release has the gutter menu added to the global settings as well as a new roof layer added for gutters in the layer menu.
You can't actually create any gutters yet but you can test out the new GUI in the global settings and offer any feedback.
I am still working out the algorithm for the downspouts. My intent is to use the standard rectangular profile downspout material for the K-Style gutter and a round profile downspout for the U-Style (half round) gutter.
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@medeek said:
Version 2.0.4c - 10.30.2017
I am still working out the algorithm for the downspouts. My intent is to use the standard rectangular profile downspout material for the K-Style gutter and a round profile downspout for the U-Style (half round) gutter.Please have an option to use round downspouts on the K-style (we call it OGEE) gutter.
Also, is it possible to create a D-profile gutter? It is much like the half-round, with some extra input fields required in order to get the half-ellipse with straight ends to the top. Maybe an option for a box profile gutter as well?
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Post or send me a sketch of the D-Style and I can add it in. I'll also add the box gutter and the fascia gutter. This will be a total of 5 different gutter types. I can always add more now that I have the template setup
Your right it doesn't make any sense to limit the downspout type to a particular gutter style. I will setup some additional options/parameters:
Downspout Type: RECTANGLE/ROUND
Downspout Length (ft./m): This length will be measured from the top plate of the wall that the truss or rafter roof rests on.
For Rectangular Downspouts, the following two parameters:
Depth: (default value 2.25" or metric value?)
Width: (default value 3.125" or metric value?)For Round Downspouts, the following one parameter:
Dia.: (default value 3.0" or metric value?)
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The gutter extension is how much the gutter extends past the rake board on a gable roof, this does not apply to a hip roof or dutch hip roof.
The vertical offset is the distance the gutter drops down from the top edge of the fascia board, the default is zero.
With a metric template the dimensions are given in mm or metres with the grid shown in cm. In US units dimensions are in inches or feet with the grid shown in inches.
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SketchUp Essentials has put together a nice overview of the plugin.
I've been talking to Justin and I may have him put together some tutorials for me. My videos are quite bland compared to his presentation.
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@medeek said:
Post or send me a sketch of the D-Style and I can add it in.
trade information on this one seems to be terrible. See attached PDF, page 11/12 has a diagram of sorts...
DPI Plastics plumbing & drainage fittings Aug 2011 - low resolution.pdf
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The D-style profile is very interesting mathematically. Its not quite an ellipse but it really has no flats so it is actually more than a rectangle with fillets since the curvature is continous. I'm going to say it can best be approximated by a superellipse with n = 2.5:
For modeling purposes though it is probably easiest just to model it as a rectangle with fillets. As such it can be defined with five dimensions, four linear and one radius.
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D-Style Gutter:
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Looks good, how about a radius field to control the curvature?
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