A game about forced loneliness, made by TACStudios
tacstudios.tngl.sh
1using UnityEngine;
2
3namespace Unity.Burst.Editor
4{
5 internal static class BurstMath
6 {
7 private const float HitBoxAdjust = 2f;
8
9 /// <summary>
10 /// Rotates <see cref="point"/> around a pivot point according to angle given in degrees.
11 /// </summary>
12 /// <param name="angle">Angle in degrees.</param>
13 /// <param name="point">Point to rotate.</param>
14 /// <param name="pivotPoint">Pivot point to rotate around.</param>
15 /// <returns>The rotated point.</returns>
16 internal static Vector2 AnglePoint(float angle, Vector2 point, Vector2 pivotPoint)
17 {
18 // https://matthew-brett.github.io/teaching/rotation_2d.html
19 // Problem Angle is calculates as angle clockwise, and here we use it as it was counterclockwise!
20 var s = Mathf.Sin(angle);
21 var c = Mathf.Cos(angle);
22 point -= pivotPoint;
23
24 return new Vector2(c * point.x - s * point.y, s * point.x + c * point.y) + pivotPoint;
25 }
26
27 /// <summary>
28 /// Calculated angle in degrees between two points.
29 /// </summary>
30 /// <param name="start">Starting point.</param>
31 /// <param name="end">End point.</param>
32 /// <returns>Angle in degrees.</returns>
33 internal static float CalculateAngle(Vector2 start, Vector2 end)
34 {
35 var distance = end - start;
36 var angle = Mathf.Rad2Deg * Mathf.Atan(distance.y / distance.x);
37 if (distance.x < 0)
38 {
39 angle += 180;
40 }
41
42 return angle;
43 }
44
45 /// <summary>
46 /// Checks if <see cref="point"/> is within <see cref="rect"/> enlarged by <see cref="HitBoxAdjust"/>.
47 /// </summary>
48 /// <param name="rect">Give rect to enlarge and check with.</param>
49 /// <param name="point">Given point to match in enlarged <see cref="rect"/>.</param>
50 /// <returns>Whether <see cref="point"/> is within enlarged <see cref="rect"/>.</returns>
51 internal static bool AdjustedContains(Rect rect, Vector2 point)
52 {
53 return rect.yMax + HitBoxAdjust >= point.y && rect.yMin - HitBoxAdjust <= point.y
54 && rect.xMax + HitBoxAdjust >= point.x && rect.xMin - HitBoxAdjust <= point.x;
55 }
56
57 /// <summary>
58 /// Checks if <see cref="num"/> is within the closed interval defined by endPoint1 and endPoint2.
59 /// </summary>
60 /// <param name="endPoint1">One side of range.</param>
61 /// <param name="endPoint2">Other side of range.</param>
62 /// <param name="num">Number to check if it is in between <see cref="endPoint1"/> and <see cref="endPoint2"/>.</param>
63 /// <returns>Whether <see cref="num"/> is within given range.</returns>
64 internal static bool WithinRange(float endPoint1, float endPoint2, float num)
65 {
66 float start, end;
67 if (endPoint1 < endPoint2)
68 {
69 start = endPoint1;
70 end = endPoint2;
71 }
72 else
73 {
74 start = endPoint2;
75 end = endPoint1;
76 }
77 return start <= num && num <= end;
78 }
79
80 /// <summary>
81 /// Rounds down to nearest amount specified by <see cref="to"/>.
82 /// </summary>
83 /// <param name="number">Number to round down.</param>
84 /// <param name="to">Specifies what amount to round down to.</param>
85 /// <returns><see cref="number"/> rounded down to amount <see cref="to"/>.</returns>
86 internal static float RoundDownToNearest(float number, float to)
87 {
88 //https://www.programmingnotes.org/7601/cs-how-to-round-a-number-to-the-nearest-x-using-cs/
89 float inverse = 1 / to;
90 float dividend = Mathf.Floor(number * inverse);
91 return dividend / inverse;
92 }
93 }
94}