3.5.1.2.9 Angleint2Angleint2-func
Description
This function is used to return angle with two lines.
Syntax
double Angleint2 (double px1, double py1, double px2, double py2,
double px3, double py3, double px4, double py4
[, int unit = 0, int direction = 0])
Parameters
px1
- The X-coordinate of the first point in the first line.
py1
- The Y-coordinate of the first point in the first line.
px2
- The X-coordinate of the second point in the first line.
py2
- The Y-coordinate of the second point in the first line.
px3
- The X-coordinate of the third point in the second line.
py3
- The Y-coordinate of the third point in the second line.
px4
- The X-coordinate of the fourth point in the second line.
py4
- The Y-coordinate of the fourth point in the second line.
unit
- Specify the unit of return value. 0 indicates radians and 1 indicates degrees. The default setting is radians.
direction
- 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=angleint2(1,1,3,3,5,7,6,9,0);
ff=; //Should return 0.32175055439664.
See Also
Angleint1
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