36 lines
2.1 KiB
C#
36 lines
2.1 KiB
C#
using System;
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namespace Syntriax.Engine.Physics2D.Primitives;
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public record Vector2D(float X, float Y)
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{
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public readonly static Vector2D Up = new(0f, 1f);
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public readonly static Vector2D Down = new(0f, -1f);
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public readonly static Vector2D Left = new(-1f, 0f);
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public readonly static Vector2D Right = new(1f, 0f);
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public readonly static Vector2D One = new(1f, 1f);
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public static Vector2D operator -(Vector2D vector) => new(0f - vector.X, 0f - vector.Y);
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public static Vector2D operator +(Vector2D left, Vector2D right) => new(left.X + right.X, left.Y + right.Y);
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public static Vector2D operator -(Vector2D left, Vector2D right) => new(left.X - right.X, left.Y - right.Y);
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public static Vector2D operator *(Vector2D vector, float value) => new(vector.X * value, vector.Y * value);
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public static Vector2D operator *(float value, Vector2D vector) => new(vector.X * value, vector.Y * value);
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public static Vector2D operator /(Vector2D vector, float value) => new(vector.X / value, vector.Y / value);
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public static float Length(Vector2D vector) => MathF.Sqrt(LengthSquared(vector));
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public static float LengthSquared(Vector2D vector) => vector.X * vector.X + vector.Y * vector.Y;
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public static float Distance(Vector2D from, Vector2D to) => Length(FromTo(from, to));
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public static Vector2D Normalize(Vector2D vector) => vector / Length(vector);
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public static Vector2D Reflect(Vector2D vector, Vector2D normal) => vector - 2f * (vector - Dot(vector, normal) * normal);
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public static Vector2D FromTo(Vector2D from, Vector2D to) => to - from;
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public static Vector2D Scale(Vector2D vector, Vector2D scale) => new(vector.X * scale.X, vector.Y * scale.Y);
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public static float Cross(Vector2D left, Vector2D right) => left.X * right.Y - left.Y * right.X;
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public static float Angle(Vector2D left, Vector2D right) => MathF.Acos(Dot(left, right) / (Length(left) * Length(right)));
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public static float Dot(Vector2D left, Vector2D right) => left.X * right.X + left.Y * right.Y;
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public override string ToString() => $"Vector2D({X}, {Y})";
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}
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