bd028579
 易尊强
2/28
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
var Point = (function () {
function Point(x, y) {
this.x = x || 0;
this.y = y || 0;
}
Point.prototype.copy = function (other) {
this.x = other.x;
this.y = other.y;
return this;
};
Point.prototype.clone = function () {
return new Point(this.x, this.y);
};
Point.prototype.set = function (x, y) {
this.x = x;
this.y = y;
return this;
};
Point.prototype.equal = function (other) {
return other.x === this.x && other.y === this.y;
};
Point.prototype.add = function (other) {
this.x += other.x;
this.y += other.y;
return this;
};
Point.prototype.scale = function (scalar) {
this.x *= scalar;
this.y *= scalar;
};
Point.prototype.scaleAndAdd = function (other, scalar) {
this.x += other.x * scalar;
this.y += other.y * scalar;
};
Point.prototype.sub = function (other) {
this.x -= other.x;
this.y -= other.y;
return this;
};
Point.prototype.dot = function (other) {
return this.x * other.x + this.y * other.y;
};
Point.prototype.len = function () {
return Math.sqrt(this.x * this.x + this.y * this.y);
};
Point.prototype.lenSquare = function () {
return this.x * this.x + this.y * this.y;
};
Point.prototype.normalize = function () {
var len = this.len();
this.x /= len;
this.y /= len;
return this;
};
Point.prototype.distance = function (other) {
var dx = this.x - other.x;
var dy = this.y - other.y;
return Math.sqrt(dx * dx + dy * dy);
};
Point.prototype.distanceSquare = function (other) {
var dx = this.x - other.x;
var dy = this.y - other.y;
return dx * dx + dy * dy;
};
Point.prototype.negate = function () {
this.x = -this.x;
this.y = -this.y;
return this;
};
Point.prototype.transform = function (m) {
if (!m) {
return;
}
var x = this.x;
var y = this.y;
this.x = m[0] * x + m[2] * y + m[4];
this.y = m[1] * x + m[3] * y + m[5];
return this;
};
Point.prototype.toArray = function (out) {
out[0] = this.x;
out[1] = this.y;
return out;
};
Point.prototype.fromArray = function (input) {
this.x = input[0];
this.y = input[1];
};
Point.set = function (p, x, y) {
p.x = x;
p.y = y;
};
Point.copy = function (p, p2) {
p.x = p2.x;
p.y = p2.y;
};
Point.len = function (p) {
return Math.sqrt(p.x * p.x + p.y * p.y);
};
Point.lenSquare = function (p) {
return p.x * p.x + p.y * p.y;
};
Point.dot = function (p0, p1) {
return p0.x * p1.x + p0.y * p1.y;
};
Point.add = function (out, p0, p1) {
out.x = p0.x + p1.x;
out.y = p0.y + p1.y;
};
Point.sub = function (out, p0, p1) {
out.x = p0.x - p1.x;
out.y = p0.y - p1.y;
};
Point.scale = function (out, p0, scalar) {
out.x = p0.x * scalar;
out.y = p0.y * scalar;
};
Point.scaleAndAdd = function (out, p0, p1, scalar) {
out.x = p0.x + p1.x * scalar;
out.y = p0.y + p1.y * scalar;
};
Point.lerp = function (out, p0, p1, t) {
var onet = 1 - t;
out.x = onet * p0.x + t * p1.x;
out.y = onet * p0.y + t * p1.y;
};
return Point;
}());
export default Point;
|
