Make a point change color when click on it

Questions
1

Hi, I am trying to make an activity so the users can click on the corners of a pyramid to count them. The pyramid is visible and the user clicks on one corner the point appears on this place. Any suggestions?

2

Not sure if this would be useful, but was a way I approached a similar problem.

3

Yes this is what I was trying to do. :slight_smile: How did you manage to do that?

4

It uses the “actions” feature in the desmos calculator. Here is the documentation on that feature: https://help.desmos.com/hc/en-us/articles/4407725009165-Actions#h_01FB2RRQ5ZHN6Q66WWWK545SGY

5

The above can get a little unwieldy as you’ll need individual actions for each point. As an alternative you can define dynamically changing colors and point sizes (“Single point” folder), but I also made some actions that work for lists of points.

1 Like
6

Do something like:
button onclick: c_hangecolor
a = 0
c_hangecolor = a -> a + 1 {a < 3}, a -> 0 {a = 3}
c_olors = [rgb(255,0,0), rgb(0,255,0), rgb(0,0,255)]
c_urrentcolor = c_olors[a]
p_oint = (0,0) color: c_urrentcolor

(not sure if this will work I just did it off the top of my head)