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GeoGebraTopicProblemEnglish
Properties
Category English
Tags Surface, solidsofrevolution, 3D, surfacesofrevolution, disappearingobject
Due On 2019-08-01
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Disappearing surfaces of revolution in 3D as a result of zoom

Brendan Lu shared this problem 2 months ago
In Progress

Hi all,

Thanks in advance for any help.

I have traced a 2D photo using functions, and now I am attempting to use the 'surface' command to rotate those functions about the x-Axis for form a 3D object. However, when using the surface command to rotate some functions, the surface of it becomes completely invisible/disappears completely when I zoom OUT.

I have attached the file with both the function, and its resulting object from the 'Surface' command, rotated 2pi about the xAxis. When zoomed out any further, the object disappears...

Files: ANNOYING.ggb
1 The same problem
Best Answer
photo
amnavetta ● 2 months ago

Just need to use the long form of the surface command. See attached. New surface b is same surface as a but using long form.

Files: notANNOYING.ggb

Comments (4)

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2
amnavetta ● 2 months ago ●

Just need to use the long form of the surface command. See attached. New surface b is same surface as a but using long form.

Files: notANNOYING.ggb
Reply
photo
1
Brendan Lu ● 2 months ago

I do not know why, or how that works....but it works beautifully.

Thankyou very much for the speedy reply.

photo
1
Simona Riva ● 2 months ago

Anyway, I think that this is worth a look by the 3D peeps :)

I'm looping this post to the Support Team.

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1
GeoGebra Team ● 1 month ago

Thanks for looping us! The 3D team looked into this and will try to fix it soon.

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