using System;
using System.Runtime.CompilerServices;

namespace MTAssets.UltimateLODSystem.MeshSimplifier
{
	public static class MathHelper
	{
		public const float PI = MathF.PI;

		public const double PId = Math.PI;

		public const float Deg2Rad = MathF.PI / 180f;

		public const double Deg2Radd = Math.PI / 180.0;

		public const float Rad2Deg = 180f / MathF.PI;

		public const double Rad2Degd = 180.0 / Math.PI;

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static double Min(double val1, double val2, double val3)
		{
			if (!(val1 < val2))
			{
				if (!(val2 < val3))
				{
					return val3;
				}
				return val2;
			}
			if (!(val1 < val3))
			{
				return val3;
			}
			return val1;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static double Clamp(double value, double min, double max)
		{
			if (!(value >= min))
			{
				return min;
			}
			if (!(value <= max))
			{
				return max;
			}
			return value;
		}

		[MethodImpl(MethodImplOptions.AggressiveInlining)]
		public static double TriangleArea(ref Vector3d p0, ref Vector3d p1, ref Vector3d p2)
		{
			Vector3d from = p1 - p0;
			Vector3d to = p2 - p0;
			return from.Magnitude * (Math.Sin(Vector3d.Angle(ref from, ref to) * (Math.PI / 180.0)) * to.Magnitude) * 0.5;
		}
	}
}