Question

I’m trying to find the proportion of numbers. I built a circular range slider using Jcanvas.
The angle total is 240 degree. I would like to keep a number between this value.

Example: 5,000 proportion of 240. Basically, when I slide the handle toward the 240 mark it will equal 5,000.

5000 will be the 240 mark, anywhere in between the number will adjust saying 120 mark will equal 2500.

I hope I’m explaining this clearly. Trying to expand my Jquery math knowledge.

Thanks…

Answer 1

Each increment in your slider should add 5000/240 to the actual value.

Thus:

0 in slider = 0
120 in slider = 120 * 5000 / 240 = 2500
240 in slider = 5000

In pseudocode:

value := sliderValue * 5000 / 240