Animation

Automatic Animation

GeoGebra allows you to animate one or several free numbers and/or angles at the same time if they are shown as sliders in the Graphics View.

If you want to animate a free number or angle in GeoGebra, you need to right click (Mac OS: Ctrl-click) on the number or angle and select Animation On from the appearing Context Menu. In order to stop the animation, you need to un-check Animation On in the same Context Menu.

Note: After animating a free number or a free angle, an animation button appears in the lower left corner of the Graphics View. It allows you to either pause or continue an animation.

In the Properties Dialog on tab Slider you can change the behavior of the animation:

On the one hand, you may control the Speed of the animation.

Note: A speed of 1 means that the animation takes about 10 seconds to run once through the interval of the slider.

On the other hand, you may change how the animation cycle is repeated:

<=> Oscillating

The animation cycle alternates between Decreasing and Increasing.

=> Increasing

The slider value is always increasing. After reaching the maximum value of the slider, it jumps back to the minimum value and continues the animation.

<= Decreasing

The slider value is always decreasing. After reaching the minimum value of the slider, it jumps back to the maximum value and continues the animation.

Note: while an automatic animation is activated, GeoGebra remains fully functional. This allows you to make changes to your construction while the animation is playing.

Manual Animation

To manually change a number or angle continuously, select the Move tool. Then, click on a free number or angle and press either the + or – key or the arrow keys on you keyboard. Keeping one of these keys pressed allows you to produce manual animations.

Example: {{{1}}}

Note: You can adjust the increment of the slider on tab Slider of the Properties Dialog of this object.

Keyboard Shortcuts

• Shift + arrow key gives you a step width of 0.1 units
• Ctrl + arrow key gives you a step width of 10 units
• Alt + arrow key gives you a step width of 100 units

Note: A point on a line can also be moved along its line using the + or – key.