Generate 2. D Output from 3. D Auto. CAD Models in a Flash. Feb, 2. 01. 1By: Bill Fane. Learning Curve tutorial: When you need 2. D working drawings, the fastest, most accurate approach is to start in 3. D. It was a clear, sunny morning. Captain Learn. Curve's son Trevor was leading the way in a brand- new 2. Bentley Super. Sport, while the Captain was following in an equally new 2. Bentley GT Speed. The Captain and his son were on a freeway on- ramp. Being that they were in Canada, the speed limit was posted at 1. Type Format Extensions Applications; CAD Models: 1: AutoCAD Export DWF Format: dwf: AutoCAD Inventor, AutoCAD Mechanical, Visual Representations: 2: AutoCAD Generic. Generate 2D Output from 3D AutoCAD Models in a Flash 23 Feb, 2011 By: Bill Fane Learning Curve tutorial: When you need 2D working drawings, the fastest. Miscellaneous: projection, modelling, rendering Projection and displays. High resolution tiled displays. Peppers ghost: prototype. The following method of distributing AutoCAD Civil 3D 2010 Update 2 applies only to administrative images created with the AutoCAD Civil 3D 2010 Network Installation. They both hit the gas and watched the speedometers climb through 8. More particularly, the need for speed in Auto. CAD. Hold it! What's this about two brand- new Bentleys? Doesn't the Captain already have an '8. Autocad 3d To 2d ProjectionsBentley Turbo R to go with his '3. Rolls- Royce Phantom III? Correct. The Captain and his gorgeous wife had driven the Bentley from Vancouver to Toronto for the Rolls- Royce Owner's Club annual meet. Their son and his wife Jenn had flown to New York for a couple of days and had then joined them in Toronto. After the meet they drove the car home while the Captain and his wife flew home. At the meet, Bentley had four demo cars available, but unfortunately a couple of their employees had called in sick, so the duo was turned loose without chaperones. Okay, let's get back to speed in Auto. CAD. Would you believe that it only took me five minutes to create this 2. D working drawing? Konden ze wel technisch tekenen v? Jazeker, al eeuwenlang. Was there technical drawing before CAD and computers? LD Assistant merges advanced lighting design software algorithms for stage and theatrical lighting design, audio & video, and event planning, with 2D/3D CAD standard. Now all we need is dimensions, center lines, and the cutting plane line, and we're done. Okay, I cheated a little bit. I started from a 3. D model, but it had taken less than two hours to produce the model. You have probably all heard the line . Yes, the 3. D printing and CNC machining processes let us go directly from art to part, but quality assurance personnel need drawings showing the critical dimensions to be checked, and so far there isn't a matter replicator big enough to produce a full- size bridge or office tower (although I believe there is one that will produce small houses). Having said that, as the 3. D tools in Auto. CAD evolve, it is becoming truer and truer that the fastest way of producing 2. D working drawings is to generate them from 3. D solid models. A further advantage is that the resulting drawings will contain far fewer, if any, graphical errors. A 3. D solid model can only exist in the computer if the real 3. D solid can exist. Yes, I can model something that is prohibitively expensive or even impossible to manufacture, but it is still possible for that real solid to exist. There have been a great many articles written extolling the virtues of designing and working in 3. D, and many more on how to create and edit 3. D models. I'm going to come at it from the other side: In this article I'll start from an existing 3. D model and show you how easy it is to create a 2. D working drawing from it. Hopefully this will convince you that 3. D is indeed the way to go. There are three ways to produce 2. D output from a 3. D model in Auto. CAD, each with its advantages and disadvantages. We'll work through them one at a time from oldest to newest so you can see how each one works. In each case we'll use the same 3. D model, which is a little simpler than my previous example. Let's Take a Flatshot! The Flat. Shot command is the oldest, fastest, easiest to use, and least versatile of the methods for producing 2. D output from a 3. D model. As usual, I'll indicate command initiation by using the format . Use the View command to align the view of the model so we are looking straight down on top of it . Now start the Flat. Shot command . This brings up the dialog box below: For now, let's just accept the defaults as indicated and click Create. Auto. CAD churns for a brief moment, then starts issuing a series of prompts that look exactly like those from the Command- line version of the Insert command. This is no coincidence, because that is exactly what is happening. Auto. CAD has projected all the edges of the model onto the XY plane of the current coordinate system (the WCS in our case), and created lines, circles, arcs, and ellipses of the edges, which it then bundles up into a block definition. Start by selecting a suitable insertion point. Next, Auto. CAD asks for X and Y scale factors, which should normally be the default value of 1, because we usually draw everything full size in Auto. CAD. Finally, it asks for a rotation angle: Take the default of 0 (zero). And here we are! The 3. D part has been projected into a flat 2. D view. Oops, that's not quite what we expected. Why are there so many extra lines, and why doesn't it show hidden lines properly? Run the Flat. Shot command again, but this time go to the Obscured Lines window and set the color to Green and the line type to Hidden. Click on the Replace existing block button and select the existing projected top view. Click Create. Ah, that's better. Now let's do the front view. Use the View command to change the current view to Front and run Flat. Shot again. Hmm, that's interesting. Once again, Auto. CAD is asking for an insertion point for a block insertion, but all we can see is what appears to be a single line. That is correct, because that's how Flat. Shot works, and this is a significant point. It takes the current screen view direction and projects it onto the XY plane of the current UCS. In the case of the top view, it projected the XY plane onto the XY plane so everything looked cool. In the case of the front view, however, we are looking at the XZ plane and projecting it onto the XY plane, so we are looking at the edge of the block insertion. It can be difficult to place a block insertion accurately under these conditions, so the best bet is to type in a coordinate triplet such as 0,0,0. We can always move the block later. This time, shift the View to Right and run Flatshot one more time, again specifying a desired insertion point for the block. Now let's look at the Top view again. After a bit of re- arranging of the block insertions (the quick and easy way is to use parametric collinear constraints), we have something that looks like this: That was easy, wasn't it! As noted earlier, Flat. Shot is simple, fast, and easy to use, but not too versatile. Now for the Gnarly Bits .. Flat. Shot creates a 2. D view of all solids in the drawing, even if they aren't currently visible on screen. You can use Block. Edit (double- click on a block insertion) to delete any unwanted objects. By default, all of the 3. D visual styles show objects in a perspective view, which you normally don't want when creating orthographic views. You can either switch to the 2. D Wireframe visual style, or you can set the Perspective system variable to 0 (zero) before running Flat. Shot. The setting of Perspective is saved with the drawing, so you can also set up a template this way. All objects in the projected views are created on the layer that is current when Flat. Shot is run. If you specified a color and/or line type for hidden/obscured edges, then they are applied as property overrides. If desired, you can edit the blocks and use the Quick. Select button of the Properties dialog box to select them and move them to a different layer. Now here's the big one: Flat. Shot will not produce cross- sections. Before the later 3. D- to- 2. D methods came along, which we will study in future articles, we would edit the block definitions to manually (and sometimes laboriously) convert projected views into section views. When it is turned on, then a line appears at any place that two faces are tangent to each other. For example, look at the right- hand side of our top view and compare it with the front view. The two tangent edges of the fillet have produced the two parallel lines in the top view. If it was off, then these two lines wouldn't appear, and there would be nothing in the top view to indicate the change in direction of the top face. You don't have to be stuck with the long, esoteric name that Auto. CAD generates when it creates 2. D views. You can Rename them to something meaningful, such as Top, Front, and so on. So what happens if you make changes to the original 3. D solid model? Just run Flat. Shot again, but this time select Replace Existing Block in the Destination window of the Flat. Shot dialog box. Select the appropriate block (here is where renaming comes in handy), and everything updates. How about isometric views? Not a problem, but they can be slightly confusing the first time you produce one. Simply align the current screen view to an isometric orientation and run Flat. Shot. The problem would seem to be that what it produces doesn't look like a proper isometric view. Ah, but don't forget that Flat. Shot projects onto the XY plane of the current UCS, and we are looking at this from a perspective angle. Flip back to the top view and everything is cool. This view also contains good examples of the tangent line option. There is one other issue about isometric views. Technically, Flat. Shot produces an isometric projection, whereas standard drafting practice is often to draw an isometric view. The difference is that an isometric view is normally drawn so that lines that are parallel to the three principle axes appear in their true length, while an isometric projection foreshortens them due to the tilting and rotating of the viewing angle of the object. The solution is simply to ignore our usual rule about drawing and inserting at full size. When inserting an isometric projection, use a scale factor of approximately 1. You can also edit the insertion later to make it match this scale factor. Get Out of Here! There is one final button on the Flat. Shot dialog box that can be useful. Click on the Export to a file button. You can now browse to a folder location and assign a file name. The resulting extracted view gets written out to a new drawing file. If you create multiple views then they each need their own file, but you can easily Insert them back into a master drawing to create your final multi- view drawing. This capability has two major uses: First, you can extract and send 2. How to Convert a 2. D Model to 3. D Using Auto. CADAdobe In. Design's tools build on the behavior of familiar implements from the real world. Ryan Mc. Vay/Photodisc/Getty Images. Use Auto. CAD's . Auto. CAD performs this expansion by first extending a new axis at right angles to the 2- D axes on which your 2- D design sits. It then makes a copy of the 2- D shapes you are expanding at a higher location on the axis, while keeping the original shapes at the base of the axis. After converting your 2- D design to 3- D, display it with realistic lighting and shadows using the . Navigate to an Auto. CAD file with a 2- D model that you want to convert to 3- D and double- click on it. Auto. CAD will load the file for you to convert. Step 2. Type . This option is more realistic than parallel projection. Step 3. Click the “cube” icon at the top right of the canvas and then drag the mouse until the top, right and front sides of the cube are visible. This changes the viewpoint from 2- D to 3- D, allowing you to see the three- dimensionality of the 3- D form that you'll create from the 2- D model. Step 4. Click the drop- down list at the top of the application window, then click the . Drag the cursor until the box reaches the height you want, and then click the mouse to end the extrusion. Click this command, and then click a shape in your 2- D model that you want to convert to a cylinder or other round form. Type the axis around which you want to revolve the shape, which can be . He has now committed to acquiring the training for a position designing characters, creatures and environments for video games, movies and other entertainment media. Photo Credits. Ryan Mc. Vay/Photodisc/Getty Images.
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