There are several forms of so called projection, some of which have foreshortening due to drawing lines (that are at 90 to each other – ie: the edges of a table top) ) in what would be the x-y planes to vanishing points. Isometrics are a very old form of “projection” from way, way back. Drawing curved edges and objects while in Isometric mode will take some practice, so be patient and have fun. the sub-option that you need to select is the “Isocirlce” option.
Using this tool while in an active isometric mode will show and extra sub-option in the command line. And to be more specific, use the “Axis, End” ellipse tool. When you need to create a circle, use an ellipse. Isometrics are fun but they are a little difficult when it comes to rounded objects and rounded edges. Shown below is an example of drawing a cube in Isometric mode: To change which Isometric mode you are in, use the F5 function button: To draft so that your lines are aligned with this Isometric mode make sure that ORTHO is turned on. This is showing you that your cursor is in an Isometric mode. Once the dialog box closes you will notice that your drawing cursor (cross hairs) will look funny. Select “Isometric Snap” from the dialog box and then click OK
To turn on the Isometric mode, Right click on the “SNAP” button that is in the Drafting Settings buttons. The Isometric planes are basically increments of 30 degrees and shown below: The picture below shows the flat Iso-drawing when the view is rotated to a 3D view as shown by the rotation of the viewcube: You can see this by looking at your view as it is shown in the viewcube. Notice below, that when drafting in an Isometric plane, you are still drawing in the flat 2D plane. It is because these lines do not diminish into the horizon that they remain at full sclae and are therefore measurable. An Isometric drawing therefore contains lines that remain paralell to each other. This means that even AutoCAD LT can draw 3D representations.Ī) A pictorial representation of an object in which all three dimensions are drawn at full scale rather than foreshortening them to the true projection or vanishing point.
AutoCAD has an isometric drawing mode that lets you drawing 3D-looking objects in 2D just like when you draw 3D objects on a flat sheet of paper.
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