## acm.graphics Class GMath

```java.lang.Object
acm.graphics.GMath
```

`public class GMathextends Object`

This class defines a variety of static mathematical methods that are useful for the `acm.graphics` package.

Method Summary
`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.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Method Detail

### angle

```public static double angle(double x,
double y)```
Returns the angle in degrees from the origin to the point (`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.

Parameters:
`x` - The x-coordinate of the point
`y` - The y-coordinate of the point
Returns:
The angle from the origin to the point (`x``y`) measured in degrees counterclockwise from the +x axis

### angle

```public 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`).

Parameters:
`x0` - The x-coordinate of one point
`y0` - The y-coordinate of that point
`x1` - The x-coordinate of the other point
`y1` - The y-coordinate of that point
Returns:
The angle formed by the line segment from (`x0``y0`) to (`x1``y1`)

### cosDegrees

`public static double cosDegrees(double angle)`
Returns the trigonometric cosine of its argument where `angle` is expressed in degrees.

Parameters:
`angle` - An angle measured in degrees
Returns:
The trigonometric cosine of the angle

### distance

```public static double distance(double x,
double y)```
Computes the distance between the origin and the point (`x``y`).

Parameters:
`x` - The x-coordinate of the point
`y` - The y-coordinate of the point
Returns:
The distance from the origin to the point (`x``y`)

### distance

```public static double distance(double x0,
double y0,
double x1,
double y1)```
Computes the distance between the points (`x0``y0`) and (`x1``y1`).

Parameters:
`x0` - The x-coordinate of one point
`y0` - The y-coordinate of that point
`x1` - The x-coordinate of the other point
`y1` - The y-coordinate of that point
Returns:
The distance between the points (`x0``y0`) and (`x1``y1`)

### round

`public static int round(double x)`
Rounds a `double` value to the nearest `int`.

Parameters:
`x` - A `double` value
Returns:
The nearest `int` value

### sinDegrees

`public static double sinDegrees(double angle)`
Returns the trigonometric sine of its argument where `angle` is expressed in degrees.

Parameters:
`angle` - An angle measured in degrees
Returns:
The trigonometric sine of the angle

### tanDegrees

`public static double tanDegrees(double angle)`
Returns the trigonometric tangent of its argument where `angle` is expressed in degrees.

Parameters:
`angle` - An angle measured in degrees
Returns:
The trigonometric tangent of the angle

### toDegrees

`public static double toDegrees(double radians)`
Converts an angle from radians to degrees. This method is defined in the `Math` class, but was added only in JDK1.2, which is not supported in all browsers.

Parameters:
`radians` - An angle measured in radians
Returns:
The equivalent angle in degrees

`public static double toRadians(double degrees)`
Converts an angle from degrees to radians. This method is defined in the `Math` class, but was added only in JDK1.2, which is not supported in all browsers.
`degrees` - An angle measured in degrees