Angleint1-func
This function return the angle between a line which through two points (px1, py1) and (px2, py2) and the X axis.
double Angleint1(double px1, double py1, double px2, double py2 [, int unit, int direction])
px1 (double)
py1 (double)
px2 (double)
py2 (double)
unit (int)
direction (int)
Returns an angle as a double value in units of radians or degrees.
double ff=angleint1(1,1,3,3,1); ff=; //Should return 45.
Angleint2