stgsharp/源代码/StgSharp/Math/Linear/vec2d.cs

using System;
using System.Runtime.InteropServices;

namespace StgSharp.Math
{

    /// <summary>
    /// A two dimension vector defined by two elements.
    /// Vec2Ds in StgSharp are defaultly usaed as colum vector. 
    /// </summary>
    public class Vec2d
    {

        internal M128Map _map;
        internal IntPtr _m128Ptr;

        public unsafe float X
        {
            get { return (*(M128*)_m128Ptr).single_0; }
            set { (*(M128*)_m128Ptr).single_0 = value; }
        }

        public unsafe float Y
        {
            get { return (*(M128*)_m128Ptr).single_1; }
            set { (*(M128*)_m128Ptr).single_1 = value; }
        }

        public Vec2d(float x, float y)
        {
            _m128Ptr = internalIO.load_internal(x, y, 0, 0);
        }

        internal Vec2d(IntPtr value)
        {
            _m128Ptr = value;
        }

        public static Vec2d operator +(Vec2d vec1, Vec2d vec2)
        {
            return new Vec2d(
                internalIO.addps_internal(vec1._m128Ptr,vec2._m128Ptr)
                );
        }

        public static Vec2d operator -(Vec2d vec1, Vec2d vec2)
        {
            return new Vec2d(
                internalIO.subps_internal(vec1._m128Ptr,vec2._m128Ptr)
                );
        }

        public static Vec2d operator *(Vec2d vec, float value)
        {
            return new Vec2d(
                internalIO.mulps_const_internal(vec._m128Ptr,value)
                );
        }

        public static Vec2d operator /(Vec2d vec, float value)
        {
            return new Vec2d(
                internalIO.divps_const_internal(vec._m128Ptr, value)
                );
        }

        public static float operator *(Vec2d vec1, Vec2d vec2)
        {
            return internalIO.mulps_sum_internal(vec1._m128Ptr, vec2._m128Ptr);
        }



    }
}