GravityGrid:
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GravityGrid
ExtensionExtension

dynamical system simulation (Newtonian gravitational force)

//SLUGens released under the GNU GPL as extensions for SuperCollider 3, by Nick Collins, http://composerprogrammer.com/index.html 

Description

Eight fixed masses around a boundary apply Newtonian gravitational force dynamics to a central moving mass which cannot escape the [-1, 1] grid in x or y. The position of the moving mass is sonified as an oscillator by its distance from the centre.

This is a relatively expensive oscillator to run.

Note: This original GravityGrid contains an erroneous folding function, and gravity which is more attractive as the distance increases! Which however, adds interesting distortions to the sound. See GravityGrid2 for a cleaned up version. This one is retained for backwards compatibility.

Class Methods

.ar

Arguments:

reset

Restart the moving mass at a random position within the square (k-rate input)

rate

amount of position update per sample (k-rate)

newx

kr input to be sampled for new x positions for the moving mass on reset

newy

kr input to be sampled for new y positions for the moving mass on reset

bufnum

Bufnum for a buffer containing weights for the different outer masses indexed as 0-3 and 5-8 and central moving mass 4. Passing -1 means that the weights are not used (are flat).

Examples