Cesium JS API
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AxisAlignedBoundingBox

AxisAlignedBoundingBox 是一个用于描述轴对齐的包围框的类,包含一个中心点和三个轴上的最小值和最大值。

构造函数

new Cesium.AxisAlignedBoundingBox([minimumX, minimumY, minimumZ, maximumX, maximumY, maximumZ])
  • minimumX - {Number} 包围盒在 X 轴上的最小值。
  • minimumY - {Number} 包围盒在 Y 轴上的最小值。
  • minimumZ - {Number} 包围盒在 Z 轴上的最小值。
  • maximumX - {Number} 包围盒在 X 轴上的最大值。
  • maximumY - {Number} 包围盒在 Y 轴上的最大值。
  • maximumZ - {Number} 包围盒在 Z 轴上的最大值。

属性

.minimum

包围盒的最小点坐标,类型为 Cartesian3

.maximum

包围盒的最大点坐标,类型为 Cartesian3

.center

包围盒的中心点坐标,类型为 Cartesian3

.halfAxes

一个 Matrix3 类型的矩阵,表示包围盒的半轴。

方法

.clone(result)

从当前包围盒对象创建一个新对象并返回。

  • result - {AxisAlignedBoundingBox} optional 可选参数,如果传入则用该对象保存克隆对象结果,否则创建一个新对象。

.intersectPlane(plane)

计算包围盒和平面的相交部分。如果不相交,则返回 undefined

  • plane - {Plane} 要计算的平面。

.intersectWithLine(start, end, intersection)

计算包围盒和射线的相交部分。如果不相交,则返回 undefined

  • start - {Cartesian3} 射线的起点。
  • end - {Cartesian3} 射线的终点。
  • intersection - {Cartesian3} 用于保存相交点坐标的可选参数。

.equals(right)

判断该包围盒对象是否与另一个对象相等。

  • right - {AxisAlignedBoundingBox} 要比较的对象。

.isFull()

判断包围盒是否为空。

.distanceSquaredTo(point)

计算该点到包围盒的最小距离。

  • point - {Cartesian3} 要计算的点坐标。

示例

var center = new Cesium.Cartesian3(1.0, 2.0, 3.5);
var halfAxes = Cesium.Matrix3.fromArray([
    1.0, 0.0, 0.0,
    0.0, 1.0, 0.0,
    0.0, 0.0, 1.0
]);

var boundingBox1 = new Cesium.AxisAlignedBoundingBox(center, halfAxes);
var boundingBox2 = new Cesium.AxisAlignedBoundingBox.fromPoints([
    new Cesium.Cartesian3(-1.0, -1.0, -1.0),
    new Cesium.Cartesian3(1.0, 1.0, 1.0)
]);

var distance = boundingBox1.distanceSquaredTo(new Cesium.Cartesian3(3.0, 1.0, 0.0));