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GeoGebra Topic Problem English

surface command problem.

alirezagholamian shared this problem 3 years ago

Not a Problem

hi:

I use surface command (surface(object,angle,axis) ) in this file but shape is not true.

please check it.

thanks

Comments (8)

Michael Borcherds ● 3 years ago

What do you think it should look like?

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alirezagholamian ● 3 years ago

it should be torus

Files: Capture1.JPG

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alirezagholamian ● 3 years ago

like as rotate polygon around zaxis.

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jumera ● 3 years ago

it doesn't work with parametric curve

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alirezagholamian ● 3 years ago

I can create this shape with parametric curve or surface but surface command with surface(object,angle,axis) have problem.

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jumera ● 3 years ago

Your a and b must be curve and not parametric curve

a= Courbe(sin(v), cos(v) + r, 0, v, 0, 2π) is a parametric curve

a=Courbe(sin(v), cos(v) + r, v, 0, 2π) is a curve

b6371e0a8907d2cbf744461342af748e

36152f69d4d0e73495d944b2a93461b8

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mathmagic ● 3 years ago

GG usa v y u como variables propias para generar la superficie de rotación así que no debe usarse ni u ni v para la definición de la curva

define la curva usando como variable la letra t

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alirezagholamian ● 3 years ago

thanks @mathmagic

with your help, i change my file and draw torus.

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