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2D sketching tutorial (by Alexsander)
Abaut http://solvespace.com/2d.pl

In text:
Since the centers are roughly horizontal already, the program infers that we want symmetry about the vertical coordinate axis. Finally, the circles should be placed so that their centers lie on the horizontal coordinate axis; so select the center of one of the circles, select the origin, and choose Constrain → Horizontal

I do not understand what it means:
"select the origin"
Mon Sep 1 2014, 03:03:50
(no subject) (by Grégoire)
The origin, it's the center of the workplane. In this case the green square between the 2 circles.

By selecting 2 points, I think SolveSpace can deduce it's a line so we can apply the horizontal constrain on it.
Mon Sep 1 2014, 03:26:05
(no subject) (by Alexsander)
Thank you. I came to:
So we begin by selecting the two circles, and choosing Sketch → Split Curves at Intersection.

It does not work.
(no subject) (by Grégoire)
Uh. It's strange! Maybe you selected one more entities than just the two circles? Because like the sketch says, "contour is self-intersecting" so the solver may work.
It's hard to debug without seeing what you did step by step...
Mon Sep 1 2014, 13:01:50
(no subject) (by Alexsander)
Plies see video
(no subject) (by Jonathan Westhues)
It looks like splitting works for you at 00:10. At 00:23, you have selected a point, not two curves.
Tue Sep 2 2014, 04:33:08
(no subject) (by Alexsander)
http://solvespace.com/pics/2d-circles-5.png
You have such a picture in the manual
Tue Sep 2 2014, 15:11:32
(no subject) (by Jonathan Westhues)
Take a look at the text below that picture in the tutorial; it's an illustration of what happens after the first split, not instructions on how to make the second split.
Tue Sep 2 2014, 15:20:24
(no subject) (by Alexsander)
Thanks! I've got it.
Wed Sep 3 2014, 16:48:01
(no subject) (by Alexsander)
Next, remove the size, and then: Please tell me what to do with pink figures and what they mean. They are located next to the green square icons (see video).
Sun Sep 7 2014, 19:08:52
(no subject) (by Alexsander)
video
(no subject) (by Jonathan Westhues)
The magenta squares are "horizontal" constraints. If you select them (or any other constraint), then you'll see a brief description in the browser window.
Sun Sep 7 2014, 21:37:03
(no subject) (by Alexsander)
If I do not delete them, you can continue to explore further the lesson? Or they should be removed?
Tue Sep 9 2014, 10:24:14
(no subject) (by Jonathan Westhues)
The constraint will be automatically deleted if you follow the instructions in the tutorial, when you split the circles into arcs.
Tue Sep 9 2014, 14:35:15
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