Angle class
Utility functions for working with angles. Unless otherwise noted, methods in this class express angles in radians.
Constructors
- Angle()
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Properties
- CLOCKWISE → int
-
Constant representing clockwise orientation
final
- COUNTERCLOCKWISE → int
-
Constant representing counterclockwise orientation
final
- NONE → int
-
Constant representing no orientation
final
- PI_OVER_2 → double
-
The value of Pi/2
final
- PI_OVER_4 → double
-
The value of Pi/4
final
- PI_TIMES_2 → double
-
The value of 2*Pi
final
Static Methods
-
angle(
Coordinate p) → double - Returns the angle of the vector from (0,0) to p, relative to the positive X-axis. The angle is normalized to be in the range ( -Pi, Pi ].
-
angle2C(
Coordinate p0, Coordinate p1) → double -
Returns the angle of the vector from p0 to p1,
relative to the positive X-axis.
The angle is normalized to be in the range
-Pi, Pi. -
angleBetween(
Coordinate tip1, Coordinate tail, Coordinate tip2) → double - Returns the unoriented smallest angle between two vectors. The computed angle will be in the range [0, Pi).
-
angleBetweenOriented(
Coordinate tip1, Coordinate tail, Coordinate tip2) → double - Returns the oriented smallest angle between two vectors. The computed angle will be in the range (-Pi, Pi]. A positive result corresponds to a counterclockwise (CCW) rotation from v1 to v2; a negative result corresponds to a clockwise (CW) rotation; a zero result corresponds to no rotation.
-
diff(
double ang1, double ang2) → double -
Computes the unoriented smallest difference between two angles.
The angles are assumed to be normalized to the range
-Pi, Pi. The result will be in the range0, Pi. -
getTurn(
double ang1, double ang2) → int - Returns whether an angle must turn clockwise or counterclockwise to overlap another angle.
-
interiorAngle(
Coordinate p0, Coordinate p1, Coordinate p2) → double -
Computes the interior angle between two segments of a ring. The ring is
assumed to be oriented in a clockwise direction. The computed angle will be
in the range
0, 2Pi -
isAcute(
Coordinate p0, Coordinate p1, Coordinate p2) → bool - Tests whether the angle between p0-p1-p2 is acute. An angle is acute if it is less than 90 degrees.
-
isObtuse(
Coordinate p0, Coordinate p1, Coordinate p2) → bool - Tests whether the angle between p0-p1-p2 is obtuse. An angle is obtuse if it is greater than 90 degrees.
-
normalize(
double angle) → double - Computes the normalized value of an angle, which is the equivalent angle in the range ( -Pi, Pi ].
-
normalizePositive(
double angle) → double - Computes the normalized positive value of an angle, which is the equivalent angle in the range [ 0, 2*Pi ). E.g.:
-
toDegrees(
double radians) → double - Converts from radians to degrees. @param radians an angle in radians @return the angle in degrees
-
toRadians(
double angleDegrees) → double - Converts from degrees to radians.