yaw-pitch-to-cartesian.java

/* 'eye' is the location of */

double yaw = eye.getYaw() > 0 ? eye.getYaw() : 360 - Math.abs(eye.getYaw()); // remove negative degrees
yaw += 90; // rotate +90 degrees
if (yaw > 360)
	yaw -= 360;
yaw  = (yaw  * Math.PI) / 180;
double pitch  = ((eye.getPitch() + 90)  * Math.PI) / 180;

// player-space
double xp = Math.sin(pitch) * Math.cos(yaw);
double zp = Math.sin(pitch) * Math.sin(yaw);
double yp = Math.cos(pitch);

// if you need it, this is world-space
xp += eye.getX();
xy += eye.getY();
xz += eye.getZ();