In GeoGebra, you can change the color of objects using tab ‘Color’ of the Properties Dialog. However, you can also have the color of an object change dynamically: Open the Properties Dialog for a certain object whose color you would like to change and click on tab ‘Advanced’. There you will find a section called ‘Dynamic Colors’ with text boxes for the color components ‘Red’, ‘Green’, and ‘Blue’.
Note: In each of these text boxes, you can enter a function with range [0, 1].
Example:
· Create three sliders a, b, and c with an interval from 0 to 1.
· Create a polygon whose color should be influenced by the slider values.
· Open the Properties Dialog for the polygon poly1 and enter the names of the three sliders into the text boxes for the color components.
·
Close the Properties
Dialog and change the values of the sliders in order to find out how each
color component influences the resulting color of the polygon.
Note: You could also animate
the sliders with different speeds in order to see the color
of the polygon change automatically.