AUTODESK SUBASSEMBLY COMPOSER PDF

Net API blog posts still open to input!!! So far the majority of the responses have been in connection with how to create a custom subassembly in. Interestingly Autodesk Labs released a new standalone application that will do just that this week for testing!! Disclaimer: What we are about to discuss is an unproven tool still under development. The Interface First, I have to say it is great to see that Autodesk is using the. Net framework to create a very nice, intuitive user interface.

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This is a blog about Autodesk Civil3D. I had taken a couple overview classes at Autodesk University this last year, and have been using ever since. SAC allows users to create their own fully functioning custom subassemblies that can range from very simplistic to extremely complicated with various programming built in.

These custom subassemlies can be huge time savers on projects. Subassembly Composer Overview The SAC program has a fairly simplistic interface with various panels that can be moved around the screen for customization. See image below. The left hand side contains items in your tool box. The center of the window contains the subassembly flowchart. This area helps you visualize how the tools chosen from the tool box relate to one another. From a user standpoint, keeping things clean and organized will make creating a subassmebly much easier.

The window directly below the flowchart contains the properties of the tools used. Simply click on an item, and the properties of that item show below. The lower right window contains several tabs. Note that the help menu currently does not work for custom subassemblies within Civil 3D; this is a known bug that has not been fixed as of yet. The third tab is for Target Parameters such as surfaces, offset targets, and elevation targets.

The fourth tab contains super elevation data should that be needed, and the last tab is for the event viewer. I have only dealt with the first three tabs thus far. The upper right window, called the preview, is probably one of the most helpful areas of the program. This area displays what the subassembly you are creating should look like, with a few limitations.

The help menu of SAC is pretty good. It seems to be a forum where users can add information, yet with some sort of control as to what information is added. There are several packet files out there for download to visually see how to use each tool. This was probably the best way that I learned how to use the program.

Open up one of the PKT files and view the data, click through the various tools and notice the properties programmed for each. Another good method in learning the software is to try and create one of the simple "out of the box" subassemblies within subassembly composer.

However, be sure to not pick something too difficult to handle, or you can quickly become disatissfied that your custom subassembly does not work. My first subassembly turned out to be too difficult to achieve at first, so I had to find another that I could actually complete.

I have been using the Civil 3D subassembly BasicSideSlopeCutDitch subassembly for quite a while and have found it extremely useful in roadway design.

In more than one circumstance, engineers have requested that I carry the channel along the toe of the fill slope to pick up additional drainage as shown in the image below. This can be a difficult process without the use of SAC, basically adding a corridor, then grading in an additional channel with grading groups or corridors, and pasting surfaces together.

The flowchart for this subassembly is shown in the SAC overview image above and basically begins with a point that would be the hinge point of the subassembly and setting a target surface in the target parameters set the surface preview to something greater than 0, while point 1 should be a 0,0.

Next add in an auxiallry point, auxillary tools are temporary calculation tools and do not show up in Civil 3D visibly. The auxiallry point, needs to be set on the target surface, thus the properties type should be set to "Delta X on Surface", form point can either be point 1 or origin, Delta X would be 0, surface target is the target surface.

We need to tell the subassembly to determine if it is in a cut or fill situation. Under the properties of the decision the conditional value needs to check both the auxillary point 1 and point 1 Y values in relation to the target surface. Thus if you type "AP1. Y" you are telling the subassembly that if the distance to surface of the auxillary point is less than the distance to surface of the point, then perform the true option, if not perform the false option. The false option can be renamed to Cut and the true option can be renamed to fill, for organization.

The left side of the decision tool is always the true value and the right side is always the cut value. Next add in a point for both the cut side and the fill side. Connect lines to each from each side of the decision tool, you should see the Fill and Cut text show up in the line. Before moving forward, we need to add in user inputs. Add the following user inputs with the columns in order following, name, type, direction, default value, display name: Side, Side, Input, Right, Side ForeslopeSlope, Slope, Input, 2.

Points should reference the previous point, beginning with point 1. Lines should also be added to connect the points, notice the preview update as the information is added. Next we need to added properties to each of the points starting with the first point on the cut side. This will be the first slope in the ditch, thus we know what the foreslope slope should be and we know what the foreslope width should be from the parameters created above. Next we need to establish the bottom of the ditch.

This we know the bottom width and the bottom is flat, thus we can use the type "Angle and Delta X" where the angle will be "0" and the Delta X will be "BottomWidth". The next segment is the backslope of the channel and should be programmed similar to the foreslope and the last segment will tie from the top of the backslope to the surface.

This segment will have a type of "Slope to Surface" using the CutSlope parameter as the slope and the target surface parameter as the surface target. The preview window should be taking shape now. The fill slope side will be very similar to the cut slope side, however, the first segment should target the target surface at the fill slope first, then proceed into the foreslope of the channel, add in the bottom width, then target the target surface a second time to close the channel.

This will not need a backslope as if a backslope is added, there is the possibility of passing the target surface and thus creating a berm, blocking drainage. Final cleanup of the subassmebly should involve going through each of the points and lines and adding in point codes and codes for the objects. These should be entered in a similar fashion, ie "Top" and "Datum" should be added to all to create a top surface and datum surface on the subassembly.

Keeping various tools in line with one another in the flowchart will make it much easier to follow while programming. Click on a tool and drag, or use the arrow keys for a more refined movement. Help menues should be made up to look similar to the "out of the box" help menus, at a minimum to provide the same type of information, schematics, and order.

Icons should be of the same format as ones provided. Starting with an "out of the box" icon is a great way to develop a nice looking icon. Simply right click on your tool palette, add a new custom palette, and import subassemblies. Browse to the PKT file saved by subassembly composer, select, and hit ok.

Subassembly is now ready for use on the palette the same way all others are used. Other users who do not have Subassembly Composer installed will need to download and install a patch from Autodesk. Posted by.

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Autodesk Subassembly Composer

This is a blog about Autodesk Civil3D. I had taken a couple overview classes at Autodesk University this last year, and have been using ever since. SAC allows users to create their own fully functioning custom subassemblies that can range from very simplistic to extremely complicated with various programming built in. These custom subassemlies can be huge time savers on projects. Subassembly Composer Overview The SAC program has a fairly simplistic interface with various panels that can be moved around the screen for customization. See image below. The left hand side contains items in your tool box.

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But first we need to talk about variables and so I am going to sneak this discussion in as Part 2 and conditionals will have to wait for Part 3. I am sure everyone has spent all weekend playing with the Subassembly Composer because it can be downloaded to your home computer while Civil3D sits all alone on your work computer back at the office all weekend. You are a regular expert at putting points and links into the flow chart and even using a sequence or two, You did read my comment on the last post that you can nest sequences, right? Here is the Input Parameters tab for the subassembly that I shared on Friday.

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By thinking about what your project needs in each phase of the project design you can make subassemblies that work for you. In conceptual design, you want to understand the site and visually see what you have to work with. As you progress into preliminary design, you want to gather information and start to make decisions to generate your design concept. As the design progresses, subassemblies can start to make more decisions for you. And with final design around the corner, you will finesse your design with a complete composite assembly with both your custom subassemblies and out-of-the-box subassemblies working together. With the right mindset, Subassembly Composer can generate subassemblies created especially for helping you through each of these key points in your civil designs.

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