trace on top of opaque figure

Niek Sprakel shared this question 4 years ago
Needs Answer


Is it possible to ensure that the trace of an opaque figure is visible on top of another opaque figure?

Like in that image, I use a trace of a circle to obtain a series of circles in different colors, but when I try to get it on top of a black band (say numbers with an x-coordinate between -1/2 and 1/2), it doesn't seem to work.

In the image I've used a black background and inverted the filling of the vertical band to achieve something similar, but is there no way to ensure the trace of circles comes out on top of the black-colored band?

Putting the band on layer 0 and the circle which is traced on layer 1 didn't seem to work. The circle ends up on top of the band, but the trace of the circle ends up below the band.

greetings and thanks in advance for any suggestions, Niek

Comments (5)


I think (not 100% sure) it's not possible (also not with properties/advanced/level).

In the attachment an alternative.


Thanks. I'm not entirely sure how this works. I can open the Trace01.ggb file in GeoGebra Classic and I see that the point C is animated and the locations of the point C are recorded in the spreadsheet in cells A2 to A21.

Is there any way to determine the number of cells that are used for recording the value of an animated object in the spreadsheet (like in case I might want to record the last 40 positions of C instead of the last 20 positions)?


- right click to C

- Record to spreadsheet

- Row limit

Copy down B21 (on the right down corner)

change B22 until Bnn the properties of circles


Somehow I don't see where I can enter the Row limit. I don't get the dialogue box when I right-click C in the CAS and pick 'record to spreadsheet' from the context menu.

I use GeoGebra Classic and it seems to work a bit differently from the version of GeoGebra in this youtube demonstration video illustrating the recording to spreadsheet feature:


sorry, also I can't find the "record to spreadsheet Box" in GGB 6.0

(strange !! maybe somebody else can help)

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