JavaFX | Point3D 类
Point3D 类是 JavaFX 的一部分。这个类定义了三维空间中的一个三维点。Point3D 类通过其 x，y，z 坐标来表示 3D 点。
该类的构造函数为:
- 点 3D(双 x，双 y，双 z) :使用指定的坐标创建点 3D 对象。
常用方法:
| 方法 | 说明 | | --- | --- | | 距离(双 x，双 y，双 z) | 计算该点和指定点之间的距离 | | 距离(点 3D p) | 计算该点和指定的点三维对象之间的距离 | | 等于(java.lang.Object o) | 返回该点的哈希代码值。 | | getX（） | 返回 x 坐标 | | 盖蒂（） | 返回 y 坐标 | | getZ() | 返回 z 坐标 | | hashCode() | 返回此 Point3D 对象的哈希代码。 |以下程序将说明 Point3D 类的使用:
1。创建一个 Point3D 对象并显示其坐标并找到其与原点的距离的 Java 程序:在这个程序中，我们通过传递其 x，y，z 坐标作为参数来创建一个名为 point3d_1 的 Point3D 对象。我们使用 getX() 、 getY() 、 getZ() 函数得到 x，y，z 参数并显示出来。我们还计算该点离原点的距离，并显示它。
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to create a point 3D
// object and display its coordinates
// and find its distance from origin
import javafx.geometry.Point3D;
public class Point3D_1 {
// Main Method
public static void main(String args[])
{
// Create a point3D object
Point3D point3d_1 = new Point3D(20.0f, 50.0f, 70.0f);
double x, y, z;
// get the coordinates of the point
x = point3d_1.getX();
y = point3d_1.getY();
z = point3d_1.getZ();
// display the coordinates of the point
System.out.println("x coordinate = " + x
+ ", y coordinate = "
+ y + ", z coordinate = " + z);
// print its distance from origin
System.out.println("Distance From Origin = "
+ point3d_1.distance(0, 0, 0));
}
}
输出:
x coordinate = 20.0, y coordinate = 50.0, z coordinate = 70.0
Distance From Origin = 88.31760866327846
2。Java 程序创建 3 个 Point3D 对象并显示它们的坐标和与原点的距离，并检查这 3 个点中的哪一个是相似的以及它们在两个点之间的距离:在这个程序中，我们通过传递其 x，y，z 坐标作为参数来创建名为 point3d_1，point3d_2，point3d_3 的 3 个 Point3D 对象。我们使用 getX() 、 getY() 、 getZ() 函数得到 x，y，z 参数并显示出来。我们还计算了该点与原点的距离，并显示了三个点的距离。我们还使用 equals() 函数显示任意两点是否相等，并使用距离函数显示两点之间的距离。
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to create 3 Point3D objects and
// display their coordinates and distance from
// origin and check which of the 3 points are
// similar and their distances between two points
import javafx.geometry.Point3D;
public class Point3D_2 {
// Main Method
public static void main(String args[])
{
// create three point3D objects
Point3D point3d_1 = new Point3D(20.0f, 50.0f, 70.0f);
Point3D point3d_2 = new Point3D(20.0f, 50.0f, 70.0f);
Point3D point3d_3 = new Point3D(200.0f, 20.0f, 90.0f);
// display the coordinates of the 3 points
display(point3d_1);
display(point3d_2);
display(point3d_3);
// check whether any point is equal to other or not
System.out.println("Point 1 equals point 2 = "
+ point3d_1.equals(point3d_2));
System.out.println("Point 2 equals point 3 = "
+ point3d_2.equals(point3d_3));
System.out.println("Point 3 equals point 1 = "
+ point3d_3.equals(point3d_1));
// distance between two points
System.out.println("Distance between point 1 and point 2 = "
+ point3d_1.distance(point3d_2));
System.out.println("Distance between point 2 and point 3 = "
+ point3d_2.distance(point3d_3));
System.out.println("Distance between point 3 and point 1 = "
+ point3d_3.distance(point3d_1));
}
// Display Method
public static void display(Point3D point3d)
{
double x, y, z;
// get the coordinates of the point
x = point3d.getX();
y = point3d.getY();
z = point3d.getZ();
// display the coordinates of the point
System.out.println("x coordinate = " + x
+ ", y coordinate = "
+ y + ", z coordinate = " + z);
// print its distance from origin
System.out.println("Distance From Origin = " +
point3d.distance(0, 0, 0));
}
}
输出:
x coordinate = 20.0, y coordinate = 50.0, z coordinate = 70.0
Distance From Origin = 88.31760866327846
x coordinate = 20.0, y coordinate = 50.0, z coordinate = 70.0
Distance From Origin = 88.31760866327846
x coordinate = 200.0, y coordinate = 20.0, z coordinate = 90.0
Distance From Origin = 220.22715545545242
Point 1 equals point 2 = true
Point 2 equals point 3 = false
Point 3 equals point 1 = false
Distance between point 1 and point 2 = 0.0
Distance between point 2 and point 3 = 183.5755975068582
Distance between point 3 and point 1 = 183.5755975068582
注意:上述程序可能无法在在线 IDE 中运行。请使用离线编译器。
参考:https://docs . Oracle . com/JavaFX/2/API/JavaFX/geometry/point3d . html
版权属于：月萌API www.moonapi.com，转载请注明出处
