In this lesson you'll create the same chair by drawing lines and then giving them thickness. Think of thickness as the height of the line or how tall it is (like a fence in your yard). This is different from the width of the line that you learned in the polyline lesson. This is a quick, simple way of achieving some degree of 3-D feel. Once again, remember that in some instances, simple concepts may do the job. This is also a good technique for AutoCAD LT users, who don't have the option to draw in true 3-D.


submitted: 5 years and 3322 days ago

The purpose of this lesson is to look further at the EXTRUDE command. As you saw in Lesson 3-7, it can be used to create a 3D solid from a closed 2D shape. Two other ways you can extrude (which you may have seen as options on the command line) are to taper the extrusion and the extrude a shape along a path. If you need to, you can also combine the two options and extrude along a path while tapering the shape.


submitted: 5 years and 3322 days ago

In this lesson, you'll begin using true 3D commands. First you will create a 2D region and then extrude it into a 3D solid. Then you will add 3-D surfaces to the tops of your previous drawing (line thickness) to close the back, sides and seat.


submitted: 5 years and 3322 days ago

In this lesson, you will be drawing two objects. First, you will draw the shape from the isometric exercise (refer to that exercise for dimensions) using the same line command that you have always used. Then you will draw a simple chair using the same method. This exercise is good practice to work on the XYZ co-ordinate system. Wireframe models are the simplest form of true 3D drawings. They can be used for conversion to other programs or other simple uses. Still, this is not a common way of drawing in 3D these days.


submitted: 5 years and 3322 days ago

AutoCAD has a few ways for you to view an object other than the plan view that you have used for your 2-D drawings. Topics covered in this lesson: vViewports and perspective views.


submitted: 5 years and 3322 days ago

Topics covered in this lesson: 3D coordinate system and rotation in 3D.


submitted: 5 years and 3331 days ago

Using Isometric commands is one of the simplest ways to give a 3-D representation while using only 2-D commands. This has been the usual way of doing things before CAD allowed true 3-D work to be done. Many times an isometric drawing is used to compliment a 3 view orthographic drawing.


submitted: 5 years and 3331 days ago

You may have already figured out why CAD has many advantages over manual drafting. One big advantage is that once you've drawn something, you shouldn't have to draw it again. If you manually drew a house plan, you would have to draw a front elevation, side elevations, and possibly a perspective view. With one 3-D CAD model, you can generate views from any angle either inside or outside the house and animations. Afterwards, if your client needs something changed, you can then make the changes once. If you're drawing mechanical parts, you can generate virtual prototypes or even create rapid prototypes. In this manner Boeing was able to design and prototype the 777 jetliner. This level of engineering would be impossible without CAD.


submitted: 5 years and 3359 days ago

Tags:dimensionsplansworking

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So far the tutorials have dealt with drawing and modifying objects. This lesson will be a primer on how to move around in your drawing. With simple drawings like the assignments in Level 1, you didn't have much need for moving around or zooming in your drawing. The more complex your drawing is, the more you will need to master the power of zooming and panning. Mastering these techniques will enable you to be more productive in your drawings and life will be better.


submitted: 5 years and 3359 days ago

Tags:drawingmodifyingobjectspanningzooming

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Now that you have learned how to draw objects and modify them using special commands, you need to know more ways to change the properties of an object. For instance, you may have made a spelling mistake in your text. You could erase it and re-create it, or you could double-click on it and just correct the error. Maybe you drew something on the wrong layer? This process is an extremely important tool to help you with your CAD work.


submitted: 5 years and 3359 days ago

Tags:changeslayersobjectsproperties

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