Relative Zero

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The location of the relative zero position is indicated by Relative zero.png in the drawing area.

The relative zero position will be set automatically when you create a new point. You can use "Set Relative Zero" to set its location without creating a point. "Lock Relative Zero" will prevent it from automatically changing.

The relative zero position gives the job of vector addition to the program. So if we create a point at 10,20 and want the next point at vector 30,40 from the last point we can use the @ symbol in the command line and enter @30,40. The alternative would be doing the math and entering 40,60.

Mode Info
Set Relative Zero
After pressing the icon, you can set the relative zero position the same way you would create a point.
Lock Relative Zero
After pressing the icon, the relative zero position will not change when creating new points.

Angles

There is another command line use case: you want to create a point 50 units from the relative zero and turned 60 degrees around it.

Again we use the @ symbol and input @50<60.

Selection 030.png

See also