public class GMath
extends java.lang.Object
acm.graphics
package.Modifier and Type | Method and Description |
---|---|
static double |
angle(double x,
double y)
Returns the angle in degrees from the origin to the point
(
x , y ). |
static double |
angle(double x0,
double y0,
double x1,
double y1)
Computes the angle in degrees formed by a line segment from the point
(
x0 , y0 ) and
(x1 , y1 ). |
static double |
cosDegrees(double angle)
Returns the trigonometric cosine of its argument where
angle is
expressed in degrees. |
static double |
distance(double x,
double y)
Computes the distance between the origin and the point
(
x , y ). |
static double |
distance(double x0,
double y0,
double x1,
double y1)
Computes the distance between the points
(
x0 , y0 ) and
(x1 , y1 ). |
static int |
round(double x)
Rounds a
double value to the nearest int . |
static double |
sinDegrees(double angle)
Returns the trigonometric sine of its argument where
angle is
expressed in degrees. |
static double |
tanDegrees(double angle)
Returns the trigonometric tangent of its argument where
angle is
expressed in degrees. |
static double |
toDegrees(double radians)
Converts an angle from radians to degrees.
|
static double |
toRadians(double degrees)
Converts an angle from degrees to radians.
|
public static int round(double x)
double
value to the nearest int
.x
- A double
valueint
valuepublic static double sinDegrees(double angle)
angle
is
expressed in degrees.angle
- An angle measured in degreespublic static double cosDegrees(double angle)
angle
is
expressed in degrees.angle
- An angle measured in degreespublic static double tanDegrees(double angle)
angle
is
expressed in degrees.angle
- An angle measured in degreespublic static double toDegrees(double radians)
Math
class, but was added only in JDK1.2, which is not supported
in all browsers.radians
- An angle measured in radianspublic static double toRadians(double degrees)
Math
class, but was added only in JDK1.2, which is not supported
in all browsers.degrees
- An angle measured in degreespublic static double distance(double x, double y)
x
, y
).x
- The x-coordinate of the pointy
- The y-coordinate of the pointx
, y
)public static double distance(double x0, double y0, double x1, double y1)
x0
, y0
) and
(x1
, y1
).x0
- The x-coordinate of one pointy0
- The y-coordinate of that pointx1
- The x-coordinate of the other pointy1
- The y-coordinate of that pointx0
, y0
) and
(x1
, y1
)public static double angle(double x, double y)
x
, y
). This method is easier to use than
atan2
because it specifies the displacements in the usual x/y
order and because it takes care of the fact that the Java coordinate system
is flipped. The point (0, 0) is arbitrarily defined to be at angle 0.x
- The x-coordinate of the pointy
- The y-coordinate of the pointx
, y
) measured in degrees
counterclockwise from the +x axispublic static double angle(double x0, double y0, double x1, double y1)
x0
, y0
) and
(x1
, y1
).x0
- The x-coordinate of one pointy0
- The y-coordinate of that pointx1
- The x-coordinate of the other pointy1
- The y-coordinate of that pointx0
, y0
) to
(x1
, y1
)