Difference between revisions of "ZoomIn Command"
From GeoGebra Manual
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;ZoomIn[ <Scale Factor> ] | ;ZoomIn[ <Scale Factor> ] | ||
:Zooms the [[Graphics View]] in by given factor with respect to current zoom, center of the screen is used as center point for the zoom. | :Zooms the [[Graphics View]] in by given factor with respect to current zoom, center of the screen is used as center point for the zoom. | ||
| − | {{example|1=<code>ZoomIn[1]</code> doesn't do anything | + | :{{example|1=<div><code>ZoomIn[1]</code> doesn't do anything</div> <div><code>ZoomIn[2]</code> zooms the view in</div> <div><code>ZoomIn[0.5]</code> is equivalent to <code>[[ZoomOut Command|ZoomOut]][2]</code>, i.e. it zooms the view out.</div>}} |
;ZoomIn[ <Scale Factor>, <Center Point> ] | ;ZoomIn[ <Scale Factor>, <Center Point> ] | ||
:Zooms the [[Graphics View]] in by given factor with respect to current zoom, second parameter specifies center point for the zoom. | :Zooms the [[Graphics View]] in by given factor with respect to current zoom, second parameter specifies center point for the zoom. | ||
| − | ;ZoomIn[ <Min | + | :{{example|1=<div><code>ZoomIn[2, (0, 0)]</code></div>}} |
| − | :Zooms the graphics view to the rectangle given by vertices (Min | + | ;ZoomIn[ <Min x>, <Min y>, <Max x>, <Max y> ] |
| + | :Zooms the graphics view to the rectangle given by vertices (Min x, Min y), (Max x, Max y). | ||
| + | :{{example|1=<div><code><nowiki>ZoomIn[0, 1, 5, 6]</nowiki></code> </div>}} | ||
| + | :{{Note|If any of these parameters are dependent or has label set, the bounds of the view become dynamic. To avoid this behaviour, use [[CopyFreeObject Command]].}} | ||
| + | :{{example|1=<div>If ''a'' is a slider, <code><nowiki>ZoomIn[-a, -a, a, a]</nowiki></code> makes the zoom of the view dependent on slider ''a''.</div>}} | ||
{{Note|If multiple [[Graphics View|Graphics Views]] are present, the active one is used.}} | {{Note|If multiple [[Graphics View|Graphics Views]] are present, the active one is used.}} | ||
Revision as of 10:15, 15 July 2013
- ZoomIn[ <Scale Factor> ]
- Zooms the Graphics View in by given factor with respect to current zoom, center of the screen is used as center point for the zoom.
- Example:
ZoomIn[1]doesn't do anythingZoomIn[2]zooms the view inZoomIn[0.5]is equivalent toZoomOut[2], i.e. it zooms the view out.
- ZoomIn[ <Scale Factor>, <Center Point> ]
- Zooms the Graphics View in by given factor with respect to current zoom, second parameter specifies center point for the zoom.
- Example:
ZoomIn[2, (0, 0)]
- ZoomIn[ <Min x>, <Min y>, <Max x>, <Max y> ]
- Zooms the graphics view to the rectangle given by vertices (Min x, Min y), (Max x, Max y).
- Example:
ZoomIn[0, 1, 5, 6]
- Note: If any of these parameters are dependent or has label set, the bounds of the view become dynamic. To avoid this behaviour, use CopyFreeObject Command.
- Example:If a is a slider,
ZoomIn[-a, -a, a, a]makes the zoom of the view dependent on slider a.
Note: If multiple Graphics Views are present, the active one is used.
Comments
Idea of Use[edit]
Linear aproximation of a function by its tangent[edit]
Create a function f with a point A on it and a button with the code ZoomIn(2,A) to see that the function looks equal to the tangent for a big "magnification". Another button with ZoomOut let you be able to prove this at other positions of the point A.
