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Difference between revisions of "Relative Zero"
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− | The location of the | + | The location of the '''relative zero''' position is indicated by [[Image:Relative_zero.png]] in the drawing area. |
− | The relative zero position will be set automatically when you create a new point. | + | 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. | + | You can use "Set Relative Zero" to set its location without creating a point. |
"Lock Relative Zero" will prevent it from automatically changing. | "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. | + | 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 <code>@</code> symbol in the command line and enter <code>@30,40</code>. The alternative would be doing the math and entering <code>40,60</code>. |
− | + | {| class="wikitable" | |
− | + | ||
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− | {| class="wikitable | + | |
! Mode | ! Mode | ||
! Info | ! Info | ||
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− | [[Image:Selection 030.png|300px]] | + | == Angles == |
+ | [[Image:Selection 030.png|300px|right]] | ||
+ | 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 <code>@</code> symbol and input <code>@50<60</code>. | ||
+ | |||
+ | The direction in which angles are measured is shown at right. | ||
− | + | {{clear}} | |
− | *[[Points]] | + | == See also == |
− | *[[ | + | * [[Points]] |
+ | * [[Coordinate system]] | ||
[[Category:Usage]] | [[Category:Usage]] |
Revision as of 06:08, 19 May 2015
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.