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1 | 1 | import Vector from 'immutable-vector2d'; |
2 | 2 | import evPos from 'ev-pos'; |
3 | 3 |
|
4 | | -const utils = { |
5 | | - |
6 | | - midPoint(p1: Vector, p2: Vector): Vector { |
7 | | - return p1.mix(p2); |
8 | | - }, |
9 | | - |
10 | | - diff(p1: Vector, p2: Vector): Vector { |
11 | | - return p1.subtract(p2); |
12 | | - }, |
13 | | - |
14 | | - direction(p1: Vector, p2: Vector): Vector { |
15 | | - return p2.subtract(p1).normalize(); |
16 | | - }, |
17 | | - |
18 | | - distance(p1: Vector, p2: Vector): Vector { |
19 | | - return p1.subtract(p2); |
20 | | - }, |
21 | | - |
22 | | - relMouseCoords(event, node) { |
23 | | - return evPos(event.nativeEvent || event, node); |
24 | | - }, |
25 | | - |
26 | | - getRectPointsBetween(p1: Vector, p2: Vector, width: number) { |
27 | | - const v = utils.diff(p1, p2); |
28 | | - const p = { // perpendicular |
29 | | - x: v.y, |
30 | | - y: -v.x |
31 | | - }; |
32 | | - const l: number = v.length(); |
33 | | - const r: number = (width / l) / 2; |
34 | | - const np = { // normalised perpendicular |
35 | | - x: p.x * r, |
36 | | - y: p.y * r |
37 | | - }; |
38 | | - |
39 | | - const cs = [ // corners |
40 | | - {x: p1.x + np.x, y: p1.y + np.y}, |
41 | | - {x: p1.x - np.x, y: p1.y - np.y}, |
42 | | - {x: p2.x - np.x, y: p2.y - np.y}, |
43 | | - {x: p2.x + np.x, y: p2.y + np.y} |
44 | | - ]; |
45 | | - |
46 | | - return cs; |
47 | | - } |
| 4 | +export const midPoint = (p1: Vector, p2: Vector): Vector => { |
| 5 | + return p1.mix(p2); |
48 | 6 | }; |
49 | 7 |
|
50 | | -export default utils; |
| 8 | +export const diff = (p1: Vector, p2: Vector): Vector => { |
| 9 | + return p1.subtract(p2); |
| 10 | +}; |
| 11 | + |
| 12 | +export const direction = (p1: Vector, p2: Vector): Vector => { |
| 13 | + return p2.subtract(p1).normalize(); |
| 14 | +}; |
| 15 | + |
| 16 | +export const distance = (p1: Vector, p2: Vector): Vector => { |
| 17 | + return p1.subtract(p2); |
| 18 | +}; |
| 19 | + |
| 20 | +export const relMouseCoords = (event, node) => { |
| 21 | + return evPos(event.nativeEvent || event, node); |
| 22 | +}; |
| 23 | + |
| 24 | +export const getRectPointsBetween = (p1: Vector, p2: Vector, width: number) => { |
| 25 | + const v = diff(p1, p2); |
| 26 | + const p = { // perpendicular |
| 27 | + x: v.y, |
| 28 | + y: -v.x |
| 29 | + }; |
| 30 | + const l: number = v.length(); |
| 31 | + const r: number = (width / l) / 2; |
| 32 | + const np = { // normalised perpendicular |
| 33 | + x: p.x * r, |
| 34 | + y: p.y * r |
| 35 | + }; |
| 36 | + |
| 37 | + const cs = [ // corners |
| 38 | + {x: p1.x + np.x, y: p1.y + np.y}, |
| 39 | + {x: p1.x - np.x, y: p1.y - np.y}, |
| 40 | + {x: p2.x - np.x, y: p2.y - np.y}, |
| 41 | + {x: p2.x + np.x, y: p2.y + np.y} |
| 42 | + ]; |
| 43 | + |
| 44 | + return cs; |
| 45 | +}; |
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