# Math conversions ## Convert Polar to Cartesian Coordinates (and reverse) ![](data/odysseybrush-nodes-math-convert-polar-cartesian.png) These nodes will convert X-Y coordinates from your stylus or mouse potision to / from Radians and Radius. ![](data/odysseybrush-nodes-math-convert-polar-cartesian-graphic.png) Here is an example below from the brush "Freckles" which generates a random position within a circle around the cursor : ![](data/odysseybrush-nodes-math-convert-polar-cartesian-example.png) The difference between dots being placed randomly within a circle around the cursor (left) and dots that just follows the cursor (right) : ![](data/odysseybrush-nodes-math-convert-polar-cartesian-example-result.png)