using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MeshTools
{
/// 圆形
/// </summary>
/// <param name="radio"></param>
/// <param name="pointAmount"></param>
/// <returns></returns>
public static Mesh MeshRound(float radio, int pointAmount)
{
float eachAngle = 360f / pointAmount;
List<Vector3> vertices = new List<Vector3>();
for (int i = 0; i <= pointAmount; i++)
{
Vector3 pos = Quaternion.Euler(0f, eachAngle * i, 0f) * Vector3.forward * radio;
vertices.Add(pos);
}
int[] triangles;
Mesh mesh = new Mesh();
int trangleAmount = vertices.Count - 2;
triangles = new int[3 * trangleAmount];
for (int i = 0; i < trangleAmount; i++)
{
triangles[3 * i] = 0;
triangles[3 * i + 1] = i + 1;
triangles[3 * i + 2] = i + 2;
}
mesh.vertices = vertices.ToArray();
mesh.triangles = triangles;
mesh.RecalculateNormals();
mesh.RecalculateBounds();
return mesh;
}
/// <summary>
/// 矩形
/// </summary>
/// <param name="target"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public static Mesh MeshRect(Transform target, float width, float height)
{
List<Vector3> vertices = new List<Vector3>();
vertices.Add(new Vector3(0, 0, 0) - target.right * (width / 2));
vertices.Add(new Vector3(0, 0, 0) - target.right * (width / 2) + target.forward * height);
vertices.Add(new Vector3(0, 0, 0) + target.right * (width / 2) + target.forward * height);
vertices.Add(new Vector3(0, 0, 0) + target.right * (width / 2));
int[] triangles;
Mesh mesh = new Mesh();
int trangleAmount = vertices.Count - 2;
triangles = new int[3 * trangleAmount];
for (int i = 0; i < trangleAmount; i++)
{
triangles[3 * i] = 0;
triangles[3 * i + 1] = i + 1;
triangles[3 * i + 2] = i + 2;
}
mesh.vertices = vertices.ToArray();
mesh.triangles = triangles;
mesh.RecalculateNormals();
mesh.RecalculateBounds();
return mesh;
}
/// <summary>
/// 矩形
/// </summary>
/// <param name="pos"></param>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public static Mesh MeshRect(Vector3 pos, float width, float height)
{
List<Vector3> vertices = new List<Vector3>();
vertices.Add(new Vector3(width / 2, pos.y, height / 2));
vertices.Add(new Vector3(width / 2, pos.y, -height / 2));
vertices.Add(new Vector3(-width / 2, pos.y, -height / 2));
vertices.Add(new Vector3(-width / 2, pos.y, height / 2));
Mesh mesh = new Mesh();
int[] triangles = new int[3 * 2];
triangles[0] = 0;
triangles[1] = 1;
triangles[2] = 2;
triangles[3] = 0;
triangles[4] = 2;
triangles[5] = 3;
mesh.vertices = vertices.ToArray();
mesh.triangles = triangles;
mesh.RecalculateNormals();
mesh.RecalculateBounds();
return mesh;
}
/// <summary>
/// 扇形
/// </summary>
/// <param name="angle"></param>
/// <param name="maxRadio"></param>
/// <param name="minRadio"></param>
/// <returns></returns>
public static Mesh MeshFan(float angle, float maxRadio, float minRadio)
{
//因为vertices(顶点)的个数与triangles（索引三角形顶点数）必须匹配
int vertices_count = 60 * 2 + 2;
Vector3[] vertices = new Vector3[vertices_count];
float angleRad = Mathf.Deg2Rad * angle;
float angleCur = angleRad;
float angledelta = angleRad / 60;
for (int i = 0; i < vertices_count; i += 2)
{
float cosA = Mathf.Cos(angleCur);
float sinA = Mathf.Sin(angleCur);
vertices[i] = new Vector3(maxRadio * cosA, 0, maxRadio * sinA);
vertices[i + 1] = new Vector3(minRadio * cosA, 0, minRadio * sinA);
angleCur -= angledelta;
}
//triangles:
int triangle_count = 60 * 6;
int[] triangles = new int[triangle_count];
for (int i = 0, vi = 0; i < triangle_count; i += 6, vi += 2)
{
triangles[i] = vi;
triangles[i + 1] = vi + 3;
triangles[i + 2] = vi + 1;
triangles[i + 3] = vi + 2;
triangles[i + 4] = vi + 3;
triangles[i + 5] = vi;
}
Mesh mesh = new Mesh();
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.RecalculateNormals();
mesh.RecalculateBounds();
return mesh;
}
}
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public enum CheckRange
{
Round, //圆形
Fan, //扇形
Rect //矩形
}
public class CheckPoint : MonoBehaviour
{
//战斗区形状
[Space(20)]
public CheckRange CheckRange = CheckRange.Round;
//圆形半径
[Header("Round:")]
public float RoundRadio = 0;
//扇形参数
[Header("Fan")]
//角度
public float FanEnagle = 0;
//最小距离
[Range(0, 1)]
public float FanMinRange = 0;
//最大剧情
public float FanMaxRange = 0;
//获取最小距离
public float GetFanMinRange
{
get
{
return FanMaxRange * FanMinRange;
}
}
//矩形范围
[Header("Rect")]
//长度
public float RectWidth = 0;
//宽度
public float RectHeight = 0;
//是否绘制Gizmos
public bool IsGzimos = false;
void OnDrawGizmos()
{
//if (!IsGzimos) return;
DrawGizmos();
}
//绘制mesh
void DrawGizmos()
{
switch (CheckRange)
{
case CheckRange.Round:
Mesh round = MeshTools.MeshRound(RoundRadio, 60);
Gizmos.color = new Color(1, 0, 0, 0.5f);
Gizmos.DrawMesh(round, transform.position);
break;
case CheckRange.Fan:
Mesh fan = MeshTools.MeshFan(FanEnagle, FanMaxRange, GetFanMinRange);
Gizmos.color = new Color(1, 0, 0, 0.5f);
Gizmos.DrawMesh(fan, transform.position);
break;
case CheckRange.Rect:
Mesh rect = MeshTools.MeshRect(transform.position, RectWidth, RectHeight);
Gizmos.color = new Color(1, 0, 0, 0.5f);
Gizmos.DrawMesh(rect, transform.position);
break;
}
}
}
