Tag: AutoCAD

Irregular Angles  I know I planned on only having a circle, rectangle and hexagon as options in my autolisp function for isometric drawing, but just after I finished with my code I realized I needed one more thing: a way to create irregular angles on the face of an axis. This makes it much easier…

The Circle  Circles are among the hardest simple geometric shapes to draw in isometric view. When transformed into an isometric view, circles become ellipses. In order to draw the ellipse, we need to determine the x and y radii using the provided radius as a reference. By transforming the x and y coordinates of the…

The Hexagon  The hexagon is a little more complicated of a shape than a rectangle. Since it has geometry directly perpendicular to one axis, it becomes trivial to use more trigonometry to solve for the points.   Developing the Geometry  Like placing any other geometry, you need a reference point, which we’ll set as the…

The Rectangle  The rectangle is the easiest, since each axis of drawing follows the isometric axis. Isometric drawings use 30° parallel projection, meaning that unlike perspective drawing, objects along the same axis don’t convene at a point, but rather are parallel to one another. This preserves the dimensions of most of the shape, however there…

I started creating isometric details in AutoCAD a while ago, and realized something I thought I already knew: AutoCAD sucks at 3D modeling. Isometric drawings are an effective way of representing 3D objects in 2D, and preserves dimensionality of the object. Unfortunately it turns out that while AutoCAD is perfectly capable of handling isometric drawings,…