timestep.java

float frameTime = dt;
		if (frameTime > 0.5f) {
			frameTime = 0.5f;
		}
		accumulatedDT += frameTime;
		while (accumulatedDT >= Physics.TIME_STEP) {
			frame++;
			tick();
			Physics.runPhysics();
			//System.out.printf("ran physics - accum: %.3f\n", accumulatedDT);
			accumulatedDT -= Physics.TIME_STEP; // 1/60f
		}