jja/gold_dolphin
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

更新空气墙

Browse Source
This commit is contained in:
ksh999000
2026-07-05 19:05:34 +08:00
parent 1caf10d602
commit e3cd86a174
7 changed files with 68148 additions and 94 deletions
Download Patch File Download Diff File Expand all files Collapse all files
unity/Assets/Light/scripts/BoundaryWallGenerator.cs
+428
View File
@@ -0,0 +1,428 @@
using System.Collections.Generic;
using UnityEngine;
namespace IndianOceanAssets.Engine2_5D
{
/// <summary>
/// 空气墙自动生成器 —— 从 Sprite Physics Shape 或 PolygonCollider2D 提取边界，
/// 沿边界路径生成 3D 碰撞墙，阻止玩家 / 敌人走出地图。
///
/// 使用方式：
/// 1. 场景中挂有此脚本的 GameObject（与 GroundBuilder 放在同一位置即可）
/// 2. 指定 groundSprite 或 polygonCollider 作为数据源
/// 3. Inspector 点 "Build Walls" 按钮生成碰撞墙
/// 4. 点 "Clear Walls" 可清除已生成的碰撞墙
/// </summary>
public class BoundaryWallGenerator : MonoBehaviour
{
// ============================================================
// 数据源
// ============================================================
[Header("数据源")]
[Tooltip("地面精灵渲染器。从此 Sprite 的 Physics Shape 自动提取边界轮廓。\n" +
"需要在 Sprite Editor 里 Generate Physics Shape（默认自动生成）。")]
[SerializeField] SpriteRenderer groundSprite;
[Tooltip("可选：直接用 PolygonCollider2D 的路径作为边界。\n" +
"留空则用 Sprite Physics Shape。")]
[SerializeField] PolygonCollider2D polygonCollider;
// ============================================================
// 碰撞设置
// ============================================================
[Header("碰撞设置")]
[Tooltip("碰撞墙高度（Y 轴方向延伸）")]
[SerializeField] float wallHeight = 3f;
[Tooltip("碰撞墙厚度（XZ 平面法线方向）。BoxCollider 模式下建议 ≥ 0.3，太薄容易穿透。")]
[SerializeField] float wallThickness = 0.5f;
[Tooltip("碰撞墙所在的 Layer")]
[SerializeField] int wallLayer = 0;
[Tooltip("碰撞模式：BoxCollider 阵列（推荐，有厚度，碰撞可靠）；MeshCollider（零厚度，可能穿透）。")]
[SerializeField] ColliderMode colliderMode = ColliderMode.BoxColliderArray;
[Header("调试")]
[Tooltip("勾选后为每段墙体添加可见 Cube，方便在 Scene 中查看位置和大小")]
[SerializeField] bool showDebugVisuals = true;
[Header("优化")]
[Tooltip("Douglas-Peucker 简化容差（世界单位）。0 = 不简化。\n" +
"建议 0.05~0.2，减少顶点数同时保持轮廓形状。")]
[SerializeField] float simplifyTolerance = 0.1f;
public enum ColliderMode
{
MeshCollider,
BoxColliderArray
}
private const string GENERATED = "Generated_BoundaryWalls";
// ============================================================
// 公开 API
// ============================================================
/// <summary>
/// 从数据源提取边界点（世界坐标）。与 GroundBuilder 逻辑一致。
/// </summary>
public List<List<Vector3>> GetBoundaryPaths()
{
var paths = new List<List<Vector3>>();
if (polygonCollider != null)
{
for (int i = 0; i < polygonCollider.pathCount; i++)
{
Vector2[] path = polygonCollider.GetPath(i);
var worldPath = new List<Vector3>();
foreach (var p in path)
{
Vector3 world = polygonCollider.transform.TransformPoint(p.x, p.y, 0f);
worldPath.Add(world);
}
if (worldPath.Count >= 3)
paths.Add(worldPath);
}
}
else if (groundSprite != null && groundSprite.sprite != null)
{
Sprite sprite = groundSprite.sprite;
int shapeCount = sprite.GetPhysicsShapeCount();
for (int i = 0; i < shapeCount; i++)
{
var shape = new List<Vector2>();
sprite.GetPhysicsShape(i, shape);
var worldPath = new List<Vector3>();
foreach (var p in shape)
{
Vector3 world = groundSprite.transform.TransformPoint(p.x, p.y, 0f);
worldPath.Add(world);
}
if (worldPath.Count >= 3)
paths.Add(worldPath);
}
}
return paths;
}
/// <summary>
/// 生成碰撞墙。
/// </summary>
[ContextMenu("Build Walls")]
public void Build()
{
var paths = GetBoundaryPaths();
if (paths.Count == 0)
{
Debug.LogWarning("[BoundaryWallGenerator] 没有找到边界数据。\n" +
"请指定 groundSprite（Sprite 需有 Physics Shape）或 polygonCollider。");
return;
}
// 简化
if (simplifyTolerance > 0f)
{
for (int i = 0; i < paths.Count; i++)
paths[i] = SimplifyClosedPath(paths[i], simplifyTolerance);
}
// 清除旧的
ClearGenerated();
// 创建容器（放在场景根层级，确保 mesh 世界坐标 = 本地坐标）
GameObject container = new GameObject(GENERATED);
container.transform.position = Vector3.zero;
container.transform.rotation = Quaternion.identity;
container.transform.localScale = Vector3.one;
container.layer = wallLayer;
container.isStatic = true;
switch (colliderMode)
{
case ColliderMode.MeshCollider:
BuildMeshColliders(container, paths);
break;
case ColliderMode.BoxColliderArray:
BuildBoxColliders(container, paths);
break;
}
int totalEdges = 0;
foreach (var p in paths) totalEdges += p.Count;
Debug.Log($"[BoundaryWallGenerator] 生成完成：{paths.Count} 条路径，{totalEdges} 个边界点，" +
$"碰撞模式 {colliderMode}，墙高 {wallHeight}，厚度 {wallThickness}。");
}
/// <summary>
/// 清除所有已生成的碰撞墙。
/// </summary>
[ContextMenu("Clear Walls")]
public void ClearGenerated()
{
// 容器在场景根层级（非子物体），用 FindObjectOfType 查找
GameObject old = GameObject.Find(GENERATED);
if (old != null)
{
if (Application.isPlaying)
Destroy(old);
else
DestroyImmediate(old);
}
}
// ============================================================
// MeshCollider 模式
// ============================================================
void BuildMeshColliders(GameObject container, List<List<Vector3>> paths)
{
for (int i = 0; i < paths.Count; i++)
{
var path = paths[i];
GameObject wallObj = new GameObject($"BoundaryWall_{i}");
wallObj.transform.SetParent(container.transform, false);
wallObj.layer = wallLayer;
wallObj.isStatic = true;
MeshFilter mf = wallObj.AddComponent<MeshFilter>();
mf.sharedMesh = GenerateWallMesh(path);
// 不添加 MeshRenderer —— 空气墙只需要碰撞，不需要渲染（无阴影、无绘制开销）
MeshCollider mc = wallObj.AddComponent<MeshCollider>();
mc.sharedMesh = mf.sharedMesh;
mc.convex = false;
}
}
/// <summary>
/// 沿闭合路径生成垂直墙体 Mesh（双面），用于 MeshCollider。
/// 直接使用世界坐标（容器物体与 BoundaryWallGenerator 同 Transform，本地偏移为零）。
/// </summary>
Mesh GenerateWallMesh(List<Vector3> worldPoints)
{
int n = worldPoints.Count;
// 顶点：top ring (0..n-1) + bottom ring (n..2n-1)
Vector3[] verts = new Vector3[n * 2];
Vector3[] norms = new Vector3[n * 2];
for (int i = 0; i < n; i++)
{
int next = (i + 1) % n;
verts[i] = worldPoints[i] + new Vector3(0, wallHeight, 0); // 顶部
verts[n + i] = worldPoints[i]; // 底部（地面高度）
// 法线：边的垂直方向，朝外
Vector3 edge = worldPoints[next] - worldPoints[i];
Vector3 normal = Vector3.Cross(edge, Vector3.down).normalized;
norms[i] = normal;
norms[n + i] = normal;
}
// 三角形：双面
var tris = new List<int>(n * 12);
for (int i = 0; i < n; i++)
{
int next = (i + 1) % n;
int ti = i, tj = next, bi = n + i, bj = n + next;
// 正面
tris.Add(ti); tris.Add(bi); tris.Add(bj);
tris.Add(ti); tris.Add(bj); tris.Add(tj);
// 背面（反绕）
tris.Add(ti); tris.Add(bj); tris.Add(bi);
tris.Add(ti); tris.Add(tj); tris.Add(bj);
}
Mesh mesh = new Mesh { name = "BoundaryWall" };
mesh.SetVertices(verts);
mesh.SetNormals(norms);
mesh.SetTriangles(tris, 0);
mesh.RecalculateBounds();
return mesh;
}
// ============================================================
// BoxCollider 阵列模式
// ============================================================
void BuildBoxColliders(GameObject container, List<List<Vector3>> paths)
{
int segIndex = 0;
for (int p = 0; p < paths.Count; p++)
{
var path = paths[p];
int n = path.Count;
for (int i = 0; i < n; i++)
{
int next = (i + 1) % n;
Vector3 a = path[i];
Vector3 b = path[next];
// 边段中点（世界坐标）
Vector3 mid = (a + b) * 0.5f;
float length = Vector3.Distance(a, b);
if (length < 0.001f) continue;
// 边段方向（投影到 XZ 平面，忽略 Y 分量）
Vector3 dir = (b - a).normalized;
dir.y = 0f;
if (dir.sqrMagnitude < 0.0001f) continue;
dir.Normalize();
// 创建子物体
GameObject segObj = new GameObject($"WallSeg_{segIndex}");
segObj.transform.SetParent(container.transform, false);
segObj.layer = wallLayer;
segObj.isStatic = true;
// 定位到中点，Y 偏移到墙高一半
segObj.transform.position = mid + new Vector3(0, wallHeight * 0.5f, 0);
// 旋转使 Z 轴沿边段方向（LookRotation: forward=Z 对齐 dir，up=Y 保持朝上）
segObj.transform.rotation = Quaternion.LookRotation(dir, Vector3.up);
// 添加 BoxCollider：X=厚度, Y=墙高, Z=边段长度
BoxCollider bc = segObj.AddComponent<BoxCollider>();
bc.size = new Vector3(wallThickness, wallHeight, length);
bc.center = Vector3.zero;
// 调试可视化：添加 Cube 让墙体可见
if (showDebugVisuals)
{
GameObject vis = GameObject.CreatePrimitive(PrimitiveType.Cube);
vis.name = "Visual";
vis.transform.SetParent(segObj.transform, false);
vis.transform.localPosition = Vector3.zero;
vis.transform.localRotation = Quaternion.identity;
vis.transform.localScale = new Vector3(wallThickness, wallHeight, length);
vis.isStatic = false;
// 移除 Cube 自带的 Collider，避免双重碰撞
var cubeCol = vis.GetComponent<Collider>();
if (cubeCol != null) DestroyImmediate(cubeCol);
}
segIndex++;
}
}
}
// ============================================================
// Douglas-Peucker 路径简化（与 GroundBuilder 一致）
// ============================================================
List<Vector3> SimplifyClosedPath(List<Vector3> points, float tolerance)
{
if (points.Count < 4) return points;
// 找离 points[0] 最远的点
float maxDist = 0f;
int farIdx = 1;
for (int i = 1; i < points.Count; i++)
{
float d = Vector3.Distance(points[0], points[i]);
if (d > maxDist) { maxDist = d; farIdx = i; }
}
var arc1 = new List<Vector3>();
var arc2 = new List<Vector3>();
for (int i = 0; i <= farIdx; i++) arc1.Add(points[i]);
for (int i = farIdx; i < points.Count; i++) arc2.Add(points[i]);
arc2.Add(points[0]);
arc1 = DouglasPeucker(arc1, tolerance);
arc2 = DouglasPeucker(arc2, tolerance);
var result = new List<Vector3>(arc1);
for (int i = 1; i < arc2.Count - 1; i++)
result.Add(arc2[i]);
return result;
}
List<Vector3> DouglasPeucker(List<Vector3> points, float tolerance)
{
if (points.Count < 3) return points;
float maxDist = 0f;
int maxIdx = 0;
Vector3 a = points[0];
Vector3 b = points[points.Count - 1];
for (int i = 1; i < points.Count - 1; i++)
{
float d = PerpDistance(points[i], a, b);
if (d > maxDist) { maxDist = d; maxIdx = i; }
}
if (maxDist > tolerance)
{
var left = DouglasPeucker(points.GetRange(0, maxIdx + 1), tolerance);
var right = DouglasPeucker(points.GetRange(maxIdx, points.Count - maxIdx), tolerance);
var result = new List<Vector3>(left);
result.AddRange(right.GetRange(1, right.Count - 1));
return result;
}
else
{
return new List<Vector3> { a, b };
}
}
float PerpDistance(Vector3 p, Vector3 lineA, Vector3 lineB)
{
Vector3 ab = lineB - lineA;
float lenSq = ab.sqrMagnitude;
if (lenSq < 1e-8f) return Vector3.Distance(p, lineA);
Vector3 ap = p - lineA;
float t = Vector3.Dot(ap, ab) / lenSq;
t = Mathf.Clamp01(t);
Vector3 proj = lineA + t * ab;
return Vector3.Distance(p, proj);
}
// ============================================================
// Gizmos —— 在 Scene 视图中预览碰撞边界
// ============================================================
private void OnDrawGizmosSelected()
{
var paths = GetBoundaryPaths();
if (paths.Count == 0) return;
Gizmos.color = new Color(1f, 0.4f, 0.2f, 0.8f); // 橙色，区别于 GroundBuilder 的蓝色
foreach (var path in paths)
{
for (int i = 0; i < path.Count; i++)
{
Vector3 cur = path[i];
Vector3 next = path[(i + 1) % path.Count];
// 底部线
Gizmos.DrawLine(cur, next);
// 顶部线
Vector3 curTop = cur + new Vector3(0, wallHeight, 0);
Vector3 nextTop = next + new Vector3(0, wallHeight, 0);
Gizmos.DrawLine(curTop, nextTop);
// 垂直连接线
Gizmos.DrawLine(cur, curTop);
Gizmos.DrawSphere(cur, 0.1f);
}
}
}
}
}
unity/Assets/Light/scripts/BoundaryWallGenerator.cs.meta
+11
View File
@@ -0,0 +1,11 @@
fileFormatVersion: 2
guid: Ci4ZvSr8Vy1K7YVdL2e+1SXH9+0+0MevgfqHwYx9g0KL0FOBKdnKSOQ=
MonoImporter:
externalObjects: {}
serializedVersion: 2
defaultReferences: []
executionOrder: 0
icon: {instanceID: 0}
userData:
assetBundleName:
assetBundleVariant: