Unity實(shí)現(xiàn)攻擊范圍檢測并繪制檢測區(qū)域
更新時間：2020年04月28日 14:49:56 作者：畫個小圓兒
這篇文章主要介紹了Unity實(shí)現(xiàn)攻擊范圍檢測并繪制檢測區(qū)域，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價值，感興趣的小伙伴們可以參考一下
本文實(shí)例為大家分享了Unity實(shí)現(xiàn)攻擊范圍檢測并繪制檢測區(qū)域的具體代碼，供大家參考，具體內(nèi)容如下
一、圓形檢測
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 圓形檢測，并繪制出運(yùn)行的攻擊范圍
/// </summary>
public class CircleDetect : MonoBehaviour {
GameObject go; //生成矩形的對象
public Transform attack; //被攻擊方
MeshFilter mf;
MeshRenderer mr;
Shader shader;
void Start () {
}
void Update () {
if (Input.GetKeyDown(KeyCode.A))
{
ToDrawCircleSolid(transform, transform.localPosition, 3);
if (CircleAttack(attack,transform,3))
{
Debug.Log("攻擊到了");
}
}
if (Input.GetKeyUp(KeyCode.A))
{
if (go != null)
{
Destroy(go);
}
}
}
/// <summary>
/// 圓形檢測
/// </summary>
/// <param name="attacked">被攻擊者</param>
/// <param name="skillPostion">技能的位置</param>
/// <param name="radius">半徑</param>
/// <returns></returns>
public bool CircleAttack(Transform attacked, Transform skillPostion, float radius)
{
float distance = Vector3.Distance(attacked.position, skillPostion.position);
if (distance <= radius)
{
return true;
}
else
{
return false;
}
}
//生成網(wǎng)格
public GameObject CreateMesh(List<Vector3> vertices)
{
int[] triangles;
Mesh mesh = new Mesh();
int triangleAmount = vertices.Count - 2;
triangles = new int[3 * triangleAmount];
//根據(jù)三角形的個數(shù)，來計(jì)算繪制三角形的頂點(diǎn)順序
//順序必須為順時針或者逆時針
for (int i = 0; i < triangleAmount; i++)
{
triangles[3 * i] = 0;
triangles[3 * i + 1] = i + 1;
triangles[3 * i + 2] = i + 2;
}
if (go == null)
{
go = new GameObject("circle");
go.transform.SetParent(transform, false);
go.transform.position = new Vector3(0, -0.4f, 0);
mf = go.AddComponent<MeshFilter>();
mr = go.AddComponent<MeshRenderer>();
shader = Shader.Find("Unlit/Color");
}
//分配一個新的頂點(diǎn)位置數(shù)組
mesh.vertices = vertices.ToArray();
//包含網(wǎng)格中所有三角形的數(shù)組
mesh.triangles = triangles;
mf.mesh = mesh;
mr.material.shader = shader;
mr.material.color = Color.red;
return go;
}
/// <summary>
/// 繪制實(shí)心圓形
/// </summary>
/// <param name="t">圓形參考物</param>
/// <param name="center">圓心</param>
/// <param name="radius">半徑</param>
public void ToDrawCircleSolid(Transform t, Vector3 center, float radius)
{
int pointAmount = 100;
float eachAngle = 360f / pointAmount;
Vector3 forward = t.forward;
List<Vector3> vertices = new List<Vector3>();
for (int i = 0; i < pointAmount; i++)
{
Vector3 pos = Quaternion.Euler(0f, eachAngle * i, 0f) * forward * radius + center;
vertices.Add(pos);
}
CreateMesh(vertices);
}
}
效果圖：
二、矩形檢測
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 矩形型攻擊檢測，并繪制檢測區(qū)域
/// </summary>
public class DrawRectangDetect : MonoBehaviour {
public Transform attacked;
GameObject go; //生成矩形
MeshFilter mf;
MeshRenderer mr;
Shader shader;
void Start () {
}
void Update () {
if (Input.GetKeyDown(KeyCode.A))
{
ToDrawRectangleSolid(transform, transform.localPosition, 4, 2);
if (RectAttackJubge(transform, attacked, 4, 2f))
{
Debug.Log("攻擊到");
}
}
if (Input.GetKeyUp(KeyCode.A))
{
if (go != null)
{
Destroy(go);
}
}
}
/// <summary>
/// 矩形攻擊范圍
/// </summary>
/// <param name="attacker">攻擊方</param>
/// <param name="attacked">被攻擊方</param>
/// <param name="forwardDistance">矩形前方的距離</param>
/// <param name="rightDistance">矩形寬度/2</param>
/// <returns></returns>
public bool RectAttackJubge(Transform attacker, Transform attacked, float forwardDistance, float rightDistance)
{
Vector3 deltaA = attacked.position - attacker.position;
float forwardDotA = Vector3.Dot(attacker.forward, deltaA);
if (forwardDotA > 0 && forwardDotA <= forwardDistance)
{
if (Mathf.Abs(Vector3.Dot(attacker.right,deltaA)) < rightDistance)
{
return true;
}
}
return false;
}
//制作網(wǎng)格
private GameObject CreateMesh(List<Vector3> vertices)
{
int[] triangles;
Mesh mesh = new Mesh();
int triangleAmount = vertices.Count - 2;
triangles = new int[3 * triangleAmount];
for (int i = 0; i < triangleAmount; i++)
{
triangles[3 * 1] = 0;
triangles[3 * i + 1] = i + 1;
triangles[3 * i + 2] = i + 2;
}
if (go == null)
{
go = new GameObject("Rectang");
go.transform.position = new Vector3(0, 0.1f, 0);
mf = go.AddComponent<MeshFilter>();
mr = go.AddComponent<MeshRenderer>();
shader = Shader.Find("Unlit/Color");
}
mesh.vertices = vertices.ToArray();
mesh.triangles = triangles;
mf.mesh = mesh;
mr.material.shader = shader;
mr.material.color = Color.red;
return go;
}
/// <summary>
/// 繪制實(shí)心長方形
/// </summary>
/// <param name="t">矩形參考物</param>
/// <param name="bottomMiddle">矩形的中心點(diǎn)</param>
/// <param name="length">矩形長度</param>
/// <param name="width">矩形寬度的一半</param>
public void ToDrawRectangleSolid(Transform t, Vector3 bottomMiddle, float length, float width)
{
List<Vector3> vertices = new List<Vector3>();
vertices.Add(bottomMiddle - t.right * width);
vertices.Add(bottomMiddle - t.right * width + t.forward * length);
vertices.Add(bottomMiddle + t.right * width + t.forward * length);
vertices.Add(bottomMiddle + t.right * width );
CreateMesh(vertices);
}
}
效果圖：
三、扇形攻擊檢測
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// 扇型攻擊檢測，并繪制檢測區(qū)域
/// </summary>
public class SectorDetect : MonoBehaviour {
public Transform attacked; //受攻擊著
GameObject go;
MeshFilter mf;
MeshRenderer mr;
Shader shader;
void Start () {
}
void Update () {
if (Input.GetKeyDown(KeyCode.A))
{
ToDrawSectorSolid(transform, transform.localPosition, 60, 3);
if (UmbrellaAttact(transform,attacked.transform,60,4))
{
Debug.Log("受攻擊了");
}
}
if (Input.GetKeyUp(KeyCode.A))
{
if (go != null)
{
Destroy(go);
}
}
}
/// <summary>
/// 扇形攻擊范圍
/// </summary>
/// <param name="attacker">攻擊者</param>
/// <param name="attacked">被攻擊方</param>
/// <param name="angle">扇形角度</param>
/// <param name="radius">扇形半徑</param>
/// <returns></returns>
public bool UmbrellaAttact(Transform attacker, Transform attacked, float angle, float radius)
{
Vector3 deltaA = attacked.position - attacker.position;
//Mathf.Rad2Deg : 弧度值到度轉(zhuǎn)換常度
//Mathf.Acos(f) : 返回參數(shù)f的反余弦值
float tmpAngle = Mathf.Acos(Vector3.Dot(deltaA.normalized, attacker.forward)) * Mathf.Rad2Deg;
if (tmpAngle < angle * 0.5f && deltaA.magnitude < radius)
{
return true;
}
return false;
}
public void ToDrawSectorSolid(Transform t, Vector3 center, float angle, float radius)
{
int pointAmmount = 100;
float eachAngle = angle / pointAmmount;
Vector3 forward = t.forward;
List<Vector3> vertices = new List<Vector3>();
vertices.Add(center);
for (int i = 0; i < pointAmmount; i++)
{
Vector3 pos = Quaternion.Euler(0f, -angle / 2 + eachAngle * (i - 1), 0f) * forward * radius + center;
vertices.Add(pos);
}
CreateMesh(vertices);
}
private GameObject CreateMesh(List<Vector3> vertices)
{
int[] triangles;
Mesh mesh = new Mesh();
int triangleAmount = vertices.Count - 2;
triangles = new int[3 * triangleAmount];
//根據(jù)三角形的個數(shù)，來計(jì)算繪制三角形的頂點(diǎn)順序
for (int i = 0; i < triangleAmount; i++)
{
triangles[3 * i] = 0;
triangles[3 * i + 1] = i + 1;
triangles[3 * i + 2] = i + 2;
}
if (go == null)
{
go = new GameObject("mesh");
go.transform.position = new Vector3(0f, 0.1f, 0.5f);
mf = go.AddComponent<MeshFilter>();
mr = go.AddComponent<MeshRenderer>();
shader = Shader.Find("Unlit/Color");
}
mesh.vertices = vertices.ToArray();
mesh.triangles = triangles;
mf.mesh = mesh;
mr.material.shader = shader;
mr.material.color = Color.red;
return go;
}
}
效果圖：
以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。
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