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Course Content


A ray line is a line that starts at the point of origin and has infinite length. It is represented by a solid line with a circle at one end. A special line is any type of line that does not intersect the boundary of the drawing area.

  • A ray line is a line that is drawn from an object to the viewer. It can be used to show the end of a beam, or to create a shadow on the ground.
  • A special line is a line that is not connected to any other lines. A special line can be used in drawings for things such as construction lines and non-visible lines.

The best way to use these lines is to create a line of thought that will lead the reader from their current state to the desired state.

There are three types of Ray Lines:

  • A Normal Ray Line is drawn at an angle of 45 degrees to the XY plane.
  • A Parallel Ray Line is drawn parallel to the XY plane and therefore has no angles.
  • A Perpendicular Ray Line is drawn perpendicular to the XY plane and therefore has no angles

The steps to create a line or ray in Autocad are as follows:

  • Click the Line tool on the Draw panel.
  • Select the start point with a left mouse click and then drag to define the start point of the line.
  • Click on an endpoint and drag it to define an end point for the line.
  • Click on another endpoint and drag it to define an end point for the line again, if necessary, or click again on a previous endpoint and drag it to change its location.
  • Press Enter when finished drawing lines or press Esc when you want to cancel drawing lines and remove all drawn points from your screen

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