86 lines
2.0 KiB
C#
86 lines
2.0 KiB
C#
using System.Numerics;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace StgSharp.Math
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{
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/// <summary>
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/// A two dimension vector defined by two elements.
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/// Vec2Ds in StgSharp are defaultly usaed as colum vector.
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/// </summary>
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[StructLayout(LayoutKind.Explicit, Size = 16, Pack = 16)]
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public struct Vec2d
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{
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[FieldOffset(0)]
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public float X;
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[FieldOffset(4)]
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public float Y;
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[FieldOffset(0)]
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internal Vector4 vec;
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public Vec2d(float x, float y)
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{
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X = x; Y = y;
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}
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public static Vec2d Zero
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{
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get { return new Vec2d(0, 0); }
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static Vec2d operator +(Vec2d vec1, Vec2d vec2)
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{
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return new Vec2d(
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vec1.X + vec2.X,
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vec1.Y + vec2.Y
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);
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static Vec2d operator -(Vec2d vec1, Vec2d vec2)
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{
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return new Vec2d(
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vec1.X - vec2.X,
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vec1.Y - vec2.Y
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);
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}
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public static Vec2d operator *(Vec2d vec, float value)
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{
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return new Vec2d(
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vec.X * value,
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vec.Y * value
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);
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}
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public static Vec2d operator /(Vec2d vec, float value)
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{
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return new Vec2d(
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vec.X / value,
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vec.Y / value
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);
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}
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public static bool operator ==(Vec2d left, Vec2d right)
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{
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return left.X == right.X && left.Y == right.Y;
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}
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public static bool operator !=(Vec2d left, Vec2d right)
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{
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return !(left == right);
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}
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public float Cross(Vec2d right)
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{
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return X * right.Y - Y * right.X;
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}
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}
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}
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