using UnityEngine;

public class MegaNearestPointTest
{
	private static Vector3 mTriangleBary = Vector3.zero;

	private static Vector3 mClosestPoint1 = Vector3.zero;

	public static Vector3 NearestPointOnMesh1(Vector3 pt, Vector3[] verts, int[] tri, ref int index, ref Vector3 bary)
	{
		float num = float.MaxValue;
		Vector3 zero = Vector3.zero;
		num = float.MaxValue;
		for (int i = 0; i < tri.Length; i += 3)
		{
			Vector3 v = verts[tri[i]];
			Vector3 v2 = verts[tri[i + 1]];
			Vector3 v3 = verts[tri[i + 2]];
			float num2 = DistPoint3Triangle3Dbl(pt, v, v2, v3);
			float num3 = num2;
			if (num3 < num)
			{
				index = i;
				bary = mTriangleBary;
				zero = mClosestPoint1;
				num = num3;
			}
		}
		return zero;
	}

	public static Vector3 NearestPointOnMesh2(Vector3 pt, Vector3[] verts, int[] tri, ref int index, ref Vector3 bary)
	{
		float num = float.MaxValue;
		Vector3 zero = Vector3.zero;
		num = float.MaxValue;
		for (int i = 0; i < tri.Length; i += 3)
		{
			Vector3 v = verts[tri[i]];
			Vector3 v2 = verts[tri[i + 1]];
			Vector3 v3 = verts[tri[i + 2]];
			float num2 = DistPoint3Triangle3Dbl(pt, v, v2, v3);
			float num3 = num2;
			if (num3 < num)
			{
				index = i;
				bary = mTriangleBary;
				zero = mClosestPoint1;
				num = num3;
			}
		}
		return zero;
	}

	public static float DistPoint3Triangle3Dbl(Vector3 mPoint, Vector3 v0, Vector3 v1, Vector3 v2)
	{
		Vector3 rhs = v0 - mPoint;
		Vector3 vector = v1 - v0;
		Vector3 lhs = v2 - v0;
		double num = vector.sqrMagnitude;
		double num2 = Vector3.Dot(lhs, vector);
		double num3 = lhs.sqrMagnitude;
		double num4 = Vector3.Dot(vector, rhs);
		double num5 = Vector3.Dot(lhs, rhs);
		double num6 = rhs.sqrMagnitude;
		double num7 = Mathf.Abs((float)num * (float)num3 - (float)num2 * (float)num2);
		double num8 = num2 * num5 - num3 * num4;
		double num9 = num2 * num4 - num * num5;
		double num10;
		if (num8 + num9 <= num7)
		{
			if (num8 < 0.0)
			{
				if (num9 < 0.0)
				{
					if (num4 < 0.0)
					{
						num9 = 0.0;
						if (0.0 - num4 >= num)
						{
							num8 = 1.0;
							num10 = num + 2.0 * num4 + num6;
						}
						else
						{
							num8 = (0.0 - num4) / num;
							num10 = num4 * num8 + num6;
						}
					}
					else
					{
						num8 = 0.0;
						if (num5 >= 0.0)
						{
							num9 = 0.0;
							num10 = num6;
						}
						else if (0.0 - num5 >= num3)
						{
							num9 = 1.0;
							num10 = num3 + 2.0 * num5 + num6;
						}
						else
						{
							num9 = (0.0 - num5) / num3;
							num10 = num5 * num9 + num6;
						}
					}
				}
				else
				{
					num8 = 0.0;
					if (num5 >= 0.0)
					{
						num9 = 0.0;
						num10 = num6;
					}
					else if (0.0 - num5 >= num3)
					{
						num9 = 1.0;
						num10 = num3 + 2.0 * num5 + num6;
					}
					else
					{
						num9 = (0.0 - num5) / num3;
						num10 = num5 * num9 + num6;
					}
				}
			}
			else if (num9 < 0.0)
			{
				num9 = 0.0;
				if (num4 >= 0.0)
				{
					num8 = 0.0;
					num10 = num6;
				}
				else if (0.0 - num4 >= num)
				{
					num8 = 1.0;
					num10 = num + 2.0 * num4 + num6;
				}
				else
				{
					num8 = (0.0 - num4) / num;
					num10 = num4 * num8 + num6;
				}
			}
			else
			{
				double num11 = 1.0 / num7;
				num8 *= num11;
				num9 *= num11;
				num10 = num8 * (num * num8 + num2 * num9 + 2.0 * num4) + num9 * (num2 * num8 + num3 * num9 + 2.0 * num5) + num6;
			}
		}
		else if (num8 < 0.0)
		{
			double num12 = num2 + num4;
			double num13 = num3 + num5;
			if (num13 > num12)
			{
				double num14 = num13 - num12;
				double num15 = num - 2.0 * num2 + num3;
				if (num14 >= num15)
				{
					num8 = 1.0;
					num9 = 0.0;
					num10 = num + 2.0 * num4 + num6;
				}
				else
				{
					num8 = num14 / num15;
					num9 = 1.0 - num8;
					num10 = num8 * (num * num8 + num2 * num9 + 2.0 * num4) + num9 * (num2 * num8 + num3 * num9 + 2.0 * num5) + num6;
				}
			}
			else
			{
				num8 = 0.0;
				if (num13 <= 0.0)
				{
					num9 = 1.0;
					num10 = num3 + 2.0 * num5 + num6;
				}
				else if (num5 >= 0.0)
				{
					num9 = 0.0;
					num10 = num6;
				}
				else
				{
					num9 = (0.0 - num5) / num3;
					num10 = num5 * num9 + num6;
				}
			}
		}
		else if (num9 < 0.0)
		{
			double num12 = num2 + num5;
			double num13 = num + num4;
			if (num13 > num12)
			{
				double num14 = num13 - num12;
				double num15 = num - 2.0 * num2 + num3;
				if (num14 >= num15)
				{
					num9 = 1.0;
					num8 = 0.0;
					num10 = num3 + 2.0 * num5 + num6;
				}
				else
				{
					num9 = num14 / num15;
					num8 = 1.0 - num9;
					num10 = num8 * (num * num8 + num2 * num9 + 2.0 * num4) + num9 * (num2 * num8 + num3 * num9 + 2.0 * num5) + num6;
				}
			}
			else
			{
				num9 = 0.0;
				if (num13 <= 0.0)
				{
					num8 = 1.0;
					num10 = num + 2.0 * num4 + num6;
				}
				else if (num4 >= 0.0)
				{
					num8 = 0.0;
					num10 = num6;
				}
				else
				{
					num8 = (0.0 - num4) / num;
					num10 = num4 * num8 + num6;
				}
			}
		}
		else
		{
			double num14 = num3 + num5 - num2 - num4;
			if (num14 <= 0.0)
			{
				num8 = 0.0;
				num9 = 1.0;
				num10 = num3 + 2.0 * num5 + num6;
			}
			else
			{
				double num15 = num - 2.0 * num2 + num3;
				if (num14 >= num15)
				{
					num8 = 1.0;
					num9 = 0.0;
					num10 = num + 2.0 * num4 + num6;
				}
				else
				{
					num8 = num14 / num15;
					num9 = 1.0 - num8;
					num10 = num8 * (num * num8 + num2 * num9 + 2.0 * num4) + num9 * (num2 * num8 + num3 * num9 + 2.0 * num5) + num6;
				}
			}
		}
		if (num10 < 0.0)
		{
			num10 = 0.0;
		}
		mClosestPoint1.x = v0.x + (float)(num8 * (double)vector.x + num9 * (double)lhs.x);
		mClosestPoint1.y = v0.y + (float)(num8 * (double)vector.y + num9 * (double)lhs.y);
		mClosestPoint1.z = v0.z + (float)(num8 * (double)vector.z + num9 * (double)lhs.z);
		mTriangleBary[1] = (float)num8;
		mTriangleBary[2] = (float)num9;
		mTriangleBary[0] = (float)(1.0 - num8 - num9);
		return (float)num10;
	}
}