Fast transcendent / trigonometric functions for Java

Question

Since the trigonometric functions in java.lang.Math are quite slow: is there a library that does a quick and good approximation? It seems possible to do a calculation severa

Answer 1

You could pre-store your sin and cos in an array if you only need some approximate values. For example, if you want to store the values from 0° to 360°:

double sin[]=new double[360];
for(int i=0;i< sin.length;++i) sin[i]=Math.sin(i/180.0*Math.PI):

you then use this array using degrees/integers instead of radians/double.