qstbak/SmartNav.Model/SmartNav.Model.Navigation/SubRegionDefinition.cs

using System.Collections.Generic;

namespace SmartNav.Model.Navigation;

public sealed class SubRegionDefinition
{
	public string Id { get; set; } = string.Empty;

	public string? Comment { get; set; }

	public float? MinY { get; set; }

	public float? MaxY { get; set; }

	public List<SubRegionVertex> Vertices { get; set; } = new List<SubRegionVertex>();

	public bool Contains(float x, float y, float z)
	{
		if (MinY.HasValue && y < MinY.Value)
		{
			return false;
		}
		if (MaxY.HasValue && y > MaxY.Value)
		{
			return false;
		}
		int count = Vertices.Count;
		if (count < 3)
		{
			return false;
		}
		bool flag = false;
		int num = 0;
		int index = count - 1;
		while (num < count)
		{
			float x2 = Vertices[num].X;
			float z2 = Vertices[num].Z;
			float x3 = Vertices[index].X;
			float z3 = Vertices[index].Z;
			if (z2 > z != z3 > z && x < (x3 - x2) * (z - z2) / (z3 - z2) + x2)
			{
				flag = !flag;
			}
			index = num++;
		}
		return flag;
	}
}