MuHua-123
62 lines
2.2 KiB
C#
62 lines
2.2 KiB
C#
using System.Collections;
|
|
using System.Collections.Generic;
|
|
using UnityEngine;
|
|
|
|
/// <summary>
|
|
/// 查找边
|
|
/// </summary>
|
|
public class FindSide : ModuleFind<DataPlateSide> {
|
|
public readonly float FindRange = 0.01f;
|
|
/// <summary> 板片资产 </summary>
|
|
public ModuleAssets<DataPlate> AssetsPlate => ModuleCore.AssetsPlate;
|
|
|
|
protected override void Awake() => ModuleCore.FindSide = this;
|
|
|
|
public override bool Find(Vector3 position, out DataPlateSide side) {
|
|
List<DataPlate> plates = AssetsPlate.Datas;
|
|
for (int i = 0; i < plates.Count; i++) {
|
|
Vector3 localPosition = position - plates[i].dataDesign.position;
|
|
side = Find(plates[i], localPosition);
|
|
if (side != null) { return true; }
|
|
}
|
|
side = null; return false;
|
|
}
|
|
|
|
/// <summary> 查询匹配的边 </summary>
|
|
private DataPlateSide Find(DataPlate plate, Vector3 localPosition) {
|
|
for (int i = 0; i < plate.plateSides.Count; i++) {
|
|
DataPlateSide side = Find(plate.plateSides[i], localPosition);
|
|
if (side != null) { return side; }
|
|
}
|
|
return null;
|
|
}
|
|
/// <summary> 查询匹配的边 </summary>
|
|
private DataPlateSide Find(DataPlateSide side, Vector3 localPosition) {
|
|
DataPlateSideDesign design = side.dataDesign;
|
|
for (int i = 0; i < design.lines.Length; i++) {
|
|
Vector3 a = design.lines[i].a;
|
|
Vector3 b = design.lines[i].b;
|
|
float distance = ProjectDistance(a, b, localPosition);
|
|
if (distance < FindRange) { return side; }
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/// <summary>
|
|
/// 向量投影法
|
|
/// 计算点c到线段ab最近的点
|
|
/// </summary>
|
|
/// <param name="a"></param>
|
|
/// <param name="b"></param>
|
|
/// <param name="c"></param>
|
|
/// <returns>如果不在线段上返回 float.MaxValue</returns>
|
|
public static float ProjectDistance(Vector3 a, Vector3 b, Vector3 c) {
|
|
Vector3 ab = b - a;
|
|
Vector3 ac = c - a;
|
|
Vector3 p = Vector3.Project(ac, ab);
|
|
if (ab.normalized != p.normalized) { return float.MaxValue; }
|
|
if (ab.magnitude < p.magnitude) { return float.MaxValue; }
|
|
return Vector3.Distance(c, p + a);
|
|
}
|
|
}
|