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very basic math question: rotating a line in a circle?

August 3, 2012 | 5:26 am

hi, i want to create a very basic patch using jit.gl.sketch where a line rotates from the center point around a circle (where r=0.8). it’s been years since i took math, and i’m really uncertain of how to calculate my x,y destination coordinates. here is my basic patch. any help is much appreciated.

– Pasted Max Patch, click to expand. –

August 3, 2012 | 6:54 am

use poltocar. note i’ve changed your right (angle) slider to send out float values from 0-2pi

– Pasted Max Patch, click to expand. –

and you need to use the trigger object to update the poltocar calculation when changing the angle


August 4, 2012 | 2:03 am

perfect! thx terry, interesting to see the use of the cartopol/poltocar objects outside of fft~ processing. i really wish my understanding of math was more thorough.


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