Last change
on this file since 1194 was 1114, checked in by iritscen, 5 years ago |
Adding OniSplit source code (v0.9.99.0). Many thanks to Neo for all his work over the years.
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File size:
1.7 KB
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[1114] | 1 | using System;
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| 2 |
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| 3 | namespace Oni
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| 4 | {
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| 5 | internal static class MathHelper
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| 6 | {
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| 7 | public const float Eps = 1e-5f;
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| 8 | public const float Pi = 3.141593f;
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| 9 | public const float HalfPi = Pi / 2.0f;
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| 10 | public const float PiOver4 = Pi / 4.0f;
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| 11 | public const float TwoPi = 2.0f * Pi;
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| 12 |
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| 13 | public static float ToDegrees(float radians) => radians * (180.0f / Pi);
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| 14 | public static float ToRadians(float degrees) => degrees * (Pi / 180.0f);
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| 15 | public static float Distance(float v1, float v2) => Math.Abs(v2 - v1);
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| 16 | public static float Lerp(float v1, float v2, float amount) => v1 + (v2 - v1) * amount;
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| 17 |
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| 18 | public static int Lerp(int v1, int v2, float amount)
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| 19 | {
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| 20 | if (amount == 0.0f)
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| 21 | return v1;
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| 22 |
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| 23 | if (amount == 1.0f)
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| 24 | return v2;
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| 25 |
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| 26 | return (int)(v1 + (v2 - v1) * amount);
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| 27 | }
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| 28 |
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| 29 | public static float Clamp(float v, float min, float max)
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| 30 | {
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| 31 | v = (v > max) ? max : v;
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| 32 | v = (v < min) ? min : v;
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| 33 |
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| 34 | return v;
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| 35 | }
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| 36 |
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| 37 | public static int Clamp(int v, int min, int max)
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| 38 | {
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| 39 | v = (v > max) ? max : v;
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| 40 | v = (v < min) ? min : v;
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| 41 |
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| 42 | return v;
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| 43 | }
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| 44 |
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| 45 | public static float Area(Vector2[] points)
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| 46 | {
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| 47 | float area = 0.0f;
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| 48 |
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| 49 | for (int i = 0; i < points.Length; i++)
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| 50 | {
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| 51 | int j = (i + 1) % points.Length;
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| 52 | area += points[i].X * points[j].Y;
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| 53 | area -= points[i].Y * points[j].X;
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| 54 | }
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| 55 |
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| 56 | return Math.Abs(area * 0.5f);
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| 57 | }
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| 58 | }
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| 59 | }
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