98 lines
2.9 KiB
C#
98 lines
2.9 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using Assets.Commo;
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using Assets.Common;
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using Assets.Generators;
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using Assets.Map;
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using Assets.Voronoi;
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using UnityEngine;
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using Random = System.Random;
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namespace Assets
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{
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[RequireComponent(typeof(MeshFilter))]
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[RequireComponent(typeof(MeshRenderer))]
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[RequireComponent(typeof(GraphGenerator))]
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public class ForestGenerator : MonoBehaviour
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{
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public GameObject[] trees;
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[Range(1, 15)]
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public float radius = 3.0f;
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public GameObject forest;
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private Random _random = new Random();
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private List<Site> _sites;
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private GraphGenerator Generator => GetComponent<GraphGenerator>();
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public void Generate()
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{
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Cleanup();
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Generator.EnsureGenerated();
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FindForestSites();
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PlaceTrees();
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_random = new Random(Generator.seed);
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}
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private void PlaceTrees()
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{
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foreach (Site site in _sites)
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{
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var sampler = new PoissonDiskSampler(radius) { Generator = _random };
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Bounding bounding =
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BoundingTools.GetBounding(site.Vertices.Select(i => Generator.BoundariesGraph.Vertices[i]));
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var offset = Vector3.up * site.Location.Type.height;
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var points = sampler.Generate((float)bounding.Width, (float)bounding.Height);
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foreach (var point in points.Select(point => point + bounding.Min).Where(point => IsPointInSite(site, point)))
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{
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PlaceRandomTree(point.ToVector3() + offset);
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}
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}
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}
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public void Cleanup()
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{
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var destroy = new List<GameObject>();
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foreach (var child in forest.transform)
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if (child is Transform t)
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destroy.Add(t.gameObject);
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foreach (var @object in destroy)
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DestroyImmediate(@object);
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}
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private void FindForestSites()
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{
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_sites = new List<Site>();
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foreach (var location in Generator.LocationGraph.Vertices.Skip(1))
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{
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var count = _random.Next(10);
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for (int i = 0; i < count; i++)
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_sites.Add(location.Sites[_random.Next(location.Sites.Count)]);
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}
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}
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private void PlaceRandomTree(Vector3 pos)
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{
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GameObject tree = Instantiate(trees[_random.Next(trees.Length)], forest.transform);
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tree.transform.position = pos - Vector3.down * 0.2f;
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}
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private bool IsPointInSite(Site site, Point point)
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{
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var polygon = site.Vertices.Select(i => Generator.BoundariesGraph[i]).ToArray();
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return PointUtils.IsPointInside(point, polygon);
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}
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}
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} |