【實用音樂app】Kepler's Orrery3 Lite|最夯免費app-綠色工廠好玩App

Kepler's Orrery Lite is a gravity simulator that composes and playsambient music. In other words, it's a generative music system that uses gravityequations as its driving force. Kepler's Orrery3 (Lite) is the iPad version. The physics: using basic Newtonian gravity equations and a 1st-order Euler simulation, Kepler's Orrery solves n-body problems in a stepwise fashion. Along the way it plays music while you fiddle with the physics, build new worlds, and throw planets around to watch them bounce! Each world, or planetary system, starts with its own initial conditions, and then the planets and gravity wells attract each other, swirl around, and collide according to the laws of physics. The worlds are all different -- changing the initial conditions a tiny bit makes the simulation come out differently. Then there's the music: think of a system like a "song," which changes with every different simulation. Whenever a body hits something it plays the next note on its melody. Each system has a different set of melodies that play on different instruments. Some worlds make slow and ambient music; others are random, sharp, and surprising.You can play with the physics: change the gravitational constant; add"antigravity" or friction; visualize the force fields and velocities. Tilt the device, and the planets slide around in a virtual spacethat's linked to our own "real" gravitational field. You can also change the initial conditions of a world: with the worldeditor, you can change the mass, positions and velocities of the bodies and then restart the world to see how itcomes out different.