public Fraction(BigDecimal original) {
super();
double A, C, D, X, Y, M;
C = original.doubleValue();
A = C;
D = C;
X = 1;
Y = 0;
do {
M = Y;
Y = X + Y * Math.round(C);
X = M;
if (C != Math.round(C)) {
C = 1 / (C - Math.round(C));
}
M = Math.round(D * Y);
} while (M != MathUtilities.toFix(D * Y, 10));
if ((Math.abs(M) > 100000) || (Math.abs(Y) > 100000) || (Math.abs(Y) == 1)) {
this.numerator = original;
this.denominator = BigInteger.ONE;
} else {
this.numerator =
BigDecimal.valueOf(Math.round((Math.abs(M) / M) * (Math.abs(Y) / Y) * Math.abs(M)));
this.denominator = new BigInteger(Long.toString(Math.round(Math.abs(Y))));
}
}
@Override
public String toString() {
if (this.denominator.equals(BigInteger.ONE))
return MathUtilities.formatNormalAnswer(this.numerator);
else return this.numerator + "/" + this.denominator;
}
public void tick(Velocity v) {
int dx = (int) (MathUtilities.cosdeg(v.direction) * v.getSpeed());
int dy = (int) (MathUtilities.sindeg(360 - v.direction) * v.getSpeed());
this.x += dx;
this.y += dy;
}