Interval.js 1.7 KB

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  1. export default class Interval {
  2. constructor() {
  3. Interval.constructor_.apply(this, arguments)
  4. }
  5. static constructor_() {
  6. this.min = null
  7. this.max = null
  8. if (arguments.length === 0) {
  9. this.min = 0.0
  10. this.max = 0.0
  11. } else if (arguments.length === 1) {
  12. const interval = arguments[0]
  13. this.init(interval.min, interval.max)
  14. } else if (arguments.length === 2) {
  15. const min = arguments[0], max = arguments[1]
  16. this.init(min, max)
  17. }
  18. }
  19. expandToInclude(interval) {
  20. if (interval.max > this.max) this.max = interval.max
  21. if (interval.min < this.min) this.min = interval.min
  22. }
  23. getWidth() {
  24. return this.max - this.min
  25. }
  26. overlaps() {
  27. if (arguments.length === 1) {
  28. const interval = arguments[0]
  29. return this.overlaps(interval.min, interval.max)
  30. } else if (arguments.length === 2) {
  31. const min = arguments[0], max = arguments[1]
  32. if (this.min > max || this.max < min) return false
  33. return true
  34. }
  35. }
  36. getMin() {
  37. return this.min
  38. }
  39. toString() {
  40. return '[' + this.min + ', ' + this.max + ']'
  41. }
  42. contains() {
  43. if (arguments.length === 1) {
  44. if (arguments[0] instanceof Interval) {
  45. const interval = arguments[0]
  46. return this.contains(interval.min, interval.max)
  47. } else if (typeof arguments[0] === 'number') {
  48. const p = arguments[0]
  49. return p >= this.min && p <= this.max
  50. }
  51. } else if (arguments.length === 2) {
  52. const min = arguments[0], max = arguments[1]
  53. return min >= this.min && max <= this.max
  54. }
  55. }
  56. init(min, max) {
  57. this.min = min
  58. this.max = max
  59. if (min > max) {
  60. this.min = max
  61. this.max = min
  62. }
  63. }
  64. getMax() {
  65. return this.max
  66. }
  67. }