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Difference between revisions of "Relative Zero"
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The location of the '''relative zero''' position is indicated by [[Image:Relative_zero.png]] in the drawing area. | The location of the '''relative zero''' position is indicated by [[Image:Relative_zero.png]] in the drawing area. |
Revision as of 19:32, 24 May 2016
The location of the relative zero position is indicated by 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 |
---|---|
After pressing the icon, you can set the relative zero position the same way you would create a point. | |
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
.
The direction in which angles are measured is shown at right.