22-3. 3D Relative Rectangular Coordinates

How to Draw in Three-dimensional Space in AutoCAD

Using Rectangle Relative Coordinates in AutoCAD

 Rectangular Relative Coordinates in AutoCAD
Rectangular Relative Coordinates to the 3D drawing based on the previous point a distance defined by axes X, Y and Z. So, use them when you are starting from a point where you currently are. (In case the picture above the current point is T1).
Command is entered on the form @X,Y,Z after the command line you want to draw.

Look at the picture above. To draw a line in 3D Space is necessary to specify the Coordinates in the following way.
  1. - Click on the Isometric button to switch to 3D view (toolbar View)
  2. - To set the point T1 is needed: a click of a button LINE
  3. - Type 5,4,3 (X, Y, Z coordinates) time point T1 positioned in 3D space by planes that we have set. These coordinates are set by Absolute rectangular coordinates.
  4. - To continue drawing a line that is positioned in T2 using rectangular coordinates relative to the Command Line box, type @ 7,4,5 (@ X, Y, Z coordinates of the point T2).
What did we do?
We were at the point T1 (no matter how we got into it). Used Rectangular Coordinates are Relative to continue to draw a line to the point T2. Using the @ sign is Relatively Coordinates (as in 2D). In this case we write @ 7,4,5 which means that we can move from point T1 (draw lines) on the X axis for the 7 units, the Y axis for 4 units and the Z axis by 5 units.

Notice and remember: 3D rectangular coordinates of the relative benefits from the starting point where we are and we use the @ sign.

To download my actual appearance this DWG file.
So the sequence of commands as follows:

Command: _line [click on the button to draw the line LINE]
Specify first point: 5,4,3 [setting up the first point T1 - starting X = 5, Y = Z = 4 and 3 - these are the absolute coordinates, but we are in 3D]
Specify next point or [Undo]: @ 7,4,5 [second set point T2 - @ = sign for the relative coordinates, X = 7, Y = Z = 4 and 5 - these are the relative coordinates]

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