Source: math/Sphere.js

  1. import { Vector3 } from './Vector3.js';
  2. import { Box3 } from './Box3.js';
  4. var _box3_1 = new Box3();
  5. var _vec3_1 = new Vector3();
  7. /**
  8.  * @constructor
  9.  * @memberof zen3d
  10.  * @param {zen3d.Vector3} [center=Vector3()]
  11.  * @param {number} [radius=0]
  12.  */
  13. function Sphere(center, radius) {
  14. 	this.center = (center !== undefined) ? center : new Vector3();
  15. 	this.radius = (radius !== undefined) ? radius : 0;
  16. }
  18. Object.assign(Sphere.prototype, /** @lends zen3d.Sphere.prototype */{
  20. 	/**
  21.      *
  22.      */
  23. 	set: function(center, radius) {
  24. 		this.center.copy(center);
  25. 		this.radius = radius;
  27. 		return this;
  28. 	},
  30. 	/**
  31.      * @method
  32.      */
  33. 	setFromArray: function(array, gap) {
  34. 		var _gap = (gap !== undefined ? gap : 3);
  36. 		var center = this.center;
  38. 		_box3_1.setFromArray(array, _gap).getCenter(center);
  40. 		var maxRadiusSq = 0;
  42. 		for (var i = 0, l = array.length; i < l; i += _gap) {
  43. 			_vec3_1.fromArray(array, i);
  44. 			maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vec3_1));
  45. 		}
  47. 		this.radius = Math.sqrt(maxRadiusSq);
  49. 		return this;
  50. 	},
  52. 	/**
  53.      *
  54.      */
  55. 	applyMatrix4: function(matrix) {
  56. 		this.center.applyMatrix4(matrix);
  57. 		this.radius = this.radius * matrix.getMaxScaleOnAxis();
  59. 		return this;
  60. 	},
  62. 	/**
  63.      *
  64.      */
  65. 	getBoundingBox: function(optionalTarget) {
  66. 		var box = optionalTarget || new Box3();
  68. 		box.set(this.center, this.center);
  69. 		box.expandByScalar(this.radius);
  71. 		return box;
  72. 	},
  74. 	/**
  75.      *
  76.      */
  77. 	clone: function() {
  78. 		return new Sphere().copy(this);
  79. 	},
  81. 	/**
  82.      *
  83.      */
  84. 	copy: function(sphere) {
  85. 		this.center.copy(sphere.center);
  86. 		this.radius = sphere.radius;
  88. 		return this;
  89. 	}
  91. });
  93. export { Sphere };