Difference between revisions of "Surface Command"
From GeoGebra Manual
Line 8: | Line 8: | ||
:*''End Value'' must be greater than or equal to ''Start Value'' and both must be finite. | :*''End Value'' must be greater than or equal to ''Start Value'' and both must be finite. | ||
:*''x, y'' and ''z'' are not allowed as parameter variables.</div>}} | :*''x, y'' and ''z'' are not allowed as parameter variables.</div>}} | ||
− | ;Surface[ | + | |
− | :Creates surface of revolution, rotating the given | + | ;Surface[ <Function>, <Angle> ] |
+ | :Creates a surface of revolution, rotating the given ''Function'' from 0 to given ''Angle'' around the x-axis. | ||
+ | |||
+ | ;Surface[<Curve>, <Angle>, <Line>] | ||
+ | :Creates a surface of revolution, rotating the ''Curve'' from 0 to given ''Angle'' around the ''Line''. |
Revision as of 08:54, 12 August 2016
- Surface[ <Expression>, <Expression>, <Expression>, <Parameter Variable 1>, <Start Value>, <End Value>, <Parameter Variable 2>, <Start Value>, <End Value> ]
- Yields the Cartesian parametric 3D surface for the given x-expression (first <Expression>), y-expression (second <Expression>) and z-expression (third <Expression>), using two <Parameter Variables> within the given intervals [<Start Value>, <End Value>].
- Example: Let r and R be two positive real numbers:
Surface[(R + r cos( u)) cos(v) , (R + r cos( u)) sin(v) , r sin(u ), u, 0, 2 π , v, 0, 2 π]
creates the torus generated by a circle of radius r whose center rotates about zAxis at a distance R.
- Note:
- End Value must be greater than or equal to Start Value and both must be finite.
- x, y and z are not allowed as parameter variables.
- Surface[ <Function>, <Angle> ]
- Creates a surface of revolution, rotating the given Function from 0 to given Angle around the x-axis.
- Surface[<Curve>, <Angle>, <Line>]
- Creates a surface of revolution, rotating the Curve from 0 to given Angle around the Line.