Angleint1
Angleint1-func
Description
This function return the angle between a line which through two points (px1, py1) and (px2, py2) and the X axis.
Syntax
double Angleint1(double px1, double py1, double px2, double py2 [, int unit, int direction])
Parameters
px1 (double)
- The X-coordinate of the first point.
py1 (double)
- The Y-coordinate of the first point.
px2 (double)
- The X-coordinate of the second point.
py2 (double)
- The Y-coordinate of the second point.
unit (int)
- Specify the unit of return value. 0 indicates radians and 1 indicates degrees. The default setting is radians.
direction (int)
- Specify the direction of the return value. 0 constrains the value to the first (+x,+y) and fourth (+x,-y) quadrant. 1 returns values from 0 to 2PI radians or 0 to 360 degrees.
Return
Returns an angle as a double value in units of radians or degrees.
Example
double ff=angleint1(1,1,3,3,1);
ff=; //Should return 45.
See Also
Angleint2