Difference between revisions of "Envelope Command"
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;Envelope[ <Path>, <Point> ]: Creates the [[w:Envelope_(mathematics) |envelope]] equation of a set of output paths while the moving point is bound to another object. | ;Envelope[ <Path>, <Point> ]: Creates the [[w:Envelope_(mathematics) |envelope]] equation of a set of output paths while the moving point is bound to another object. | ||
An envelope is a curve that is tangent to each member of the family of the output paths at some point. | An envelope is a curve that is tangent to each member of the family of the output paths at some point. | ||
:{{example| 1=<div>[http://www.geogebra.org/student/m67909 A ladder is leaning against the wall and sliding down.] </div>The contour of its trace will be the envelope of the ladder. Strictly speaking, GeoGebra computes the envelope of the entire line containing the ladder as a segment. Only such envelopes can be computed where the appropriate construction leads to an algebraic equation system.}} | :{{example| 1=<div>[http://www.geogebra.org/student/m67909 A ladder is leaning against the wall and sliding down.] </div>The contour of its trace will be the envelope of the ladder. Strictly speaking, GeoGebra computes the envelope of the entire line containing the ladder as a segment. Only such envelopes can be computed where the appropriate construction leads to an algebraic equation system.}} | ||
{{Note| See also [[Locus]] command.}} | {{Note| See also [[Locus]] command.}} | ||
Revision as of 18:11, 22 May 2016
- Envelope[ <Path>, <Point> ]
- Creates the envelope equation of a set of output paths while the moving point is bound to another object.
An envelope is a curve that is tangent to each member of the family of the output paths at some point.
- Example: The contour of its trace will be the envelope of the ladder. Strictly speaking, GeoGebra computes the envelope of the entire line containing the ladder as a segment. Only such envelopes can be computed where the appropriate construction leads to an algebraic equation system.
Note: See also Locus command.
