unity开发之3d网格地图（二）

2023-02-26 07:43| 来源: 网络整理| 查看: 265

前面一章实现了地图的分割，下面来实现点击网格地图的选中状态。当某个网格被选中时，在相应的位置绘制一个mesh，来达到选中的效果。

实现效果图如下：

正方形.png 正六边形.png

1.地图网格控制类（进行了扩展）

public enum GridShapeType { /// /// 正方形 /// Square, /// /// 正六边形 /// RegularHexagon, } public class MapGridCtr: MonoBehaviour { private const float MAXDIS = 10000001f; public static MapGridCtr mIns; /// /// 网格线是否显示 /// public bool showGrid = true; /// /// 网格线宽度 /// public float gridLine = 0.1f; /// /// 网格线颜色 /// public Color gridColor = Color.red; /// /// 网格线 /// private GameObject[,] m_lines; /// /// 一个网格的基数 /// public int coefficient = 8; /// /// 当前地图地形 /// public Terrain m_terrian; /// /// 当前地图地形行数 /// private int m_arrRow = 0; public int ArrRow { get { return this.m_arrRow; } } /// /// 当前地图地形宽度 /// private int m_arrCol = 0; public int ArrCol { get { return this.m_arrCol; } } /// /// 当前地图vector3数据 /// private Vector3[,] m_array; public Vector3[,] Array { get { return this.m_array; } } /// /// 网片 /// private GameObject m_defaultMesh; private GameObject m_mesh { get { if (m_defaultMesh == null) m_defaultMesh = new GameObject(); return m_defaultMesh; } } /// /// 网片形状 /// public GridShapeType m_meshType; /// /// 网片颜色 /// private Color m_color = Color.yellow; public Mesh CurrenMesh { get; private set; } /// /// 网片缓存 /// private Dictionary meshCaches = new Dictionary(); protected void Awake() { mIns = this; } protected void Start() { this.LoadMap(); } /// /// 加载地图数据 /// public void LoadMap() { if (this.m_terrian == null) { Debug.Log("Terrian is null!"); return; } if (this.m_meshType == GridShapeType.Square && this.coefficient < 2) { Debug.Log("If the shape of mesh is square, coefficient must be bigger than 2!"); return; } TerrainData data = m_terrian.terrainData; int mapz = (int)(data.size.x / data.heightmapScale.x); int mapx = (int)(data.size.z / data.heightmapScale.z); this.m_arrRow = Math.Min(data.heightmapWidth, mapz); this.m_arrCol = Math.Min(data.heightmapHeight, mapx); float[,] heightPosArray = data.GetHeights(0, 0, this.m_arrRow, this.m_arrCol); this.m_array = new Vector3[this.m_arrRow, this.m_arrCol]; for (int i = 0; i < this.m_arrRow; ++i) { for (int j = 0; j < this.m_arrCol; ++j) { this.m_array[i, j] = new Vector3(j * data.heightmapScale.x, heightPosArray[i, j] * data.heightmapScale.y, i * data.heightmapScale.z); } } if (this.showGrid) { this.ShowGrid(); } } /// /// 显示地图网格 /// private void ShowGrid() { switch (m_meshType) { case GridShapeType.Square: { this.ShowSquareGird(); break; } case GridShapeType.RegularHexagon: { this.ShowRegularHexagon(); break; } default: { Debug.LogError("暂不支持此形状！ m_meshType： " + m_meshType); break; } } } /// /// 显示正方形网格 /// coefficient代表边的网格数，最小为2 /// private void ShowSquareGird() { Vector3[] pos; int rn = this.m_arrRow / (this.coefficient - 1); int cn = this.m_arrCol / (this.coefficient - 1); if (this.m_arrRow % (this.coefficient - 1) > 0) ++rn; if (this.m_arrCol % (this.coefficient - 1) > 0) ++cn; this.m_lines = new GameObject[rn, cn]; for (int i = 0; i < this.m_arrRow - 1;) { int lastr = i + this.coefficient - 1; if (lastr >= this.m_arrRow) { lastr = this.m_arrRow - 1; } for (int j = 0; j < this.m_arrCol - 1;) { int lastc = j + this.coefficient - 1; if (lastc >= this.m_arrCol) { lastc = this.m_arrCol - 1; } if (lastr < this.m_arrRow - 1 && lastc < this.m_arrCol - 1) { pos = new Vector3[this.coefficient * 4]; for (int k = 0; k < this.coefficient; ++k) { pos[0 * this.coefficient + k] = this.m_array[i, j + k]; pos[1 * this.coefficient + k] = this.m_array[i + k, lastc]; pos[2 * this.coefficient + k] = this.m_array[lastr, lastc - k]; pos[3 * this.coefficient + k] = this.m_array[lastr - k, j]; } this.CreatLine(i / (this.coefficient - 1), j / (this.coefficient - 1), pos); } else { int cr = lastr - i + 1; int cl = lastc - j + 1; pos = new Vector3[(cr + cl) * 2]; for (int k = 0; k < cr; ++k) { pos[cl + k] = this.m_array[i + k, lastc]; pos[cr + 2 * cl + k] = this.m_array[lastr - k, j]; } for (int k = 0; k < cl; ++k) { pos[k] = this.m_array[i, j + k]; pos[cr + cl + k] = this.m_array[lastr, lastc - k]; } this.CreatLine(i / (this.coefficient - 1), j / (this.coefficient - 1), pos); } j = lastc; } i = lastr; } } /// /// 显示正六边形网格 /// 正六边形边长最小为5，coefficient表示倍率 /// private void ShowRegularHexagon() { this.coefficient = this.coefficient / 5; Vector3[] pos_1; Vector3[] pos_2; int num_1 = this.m_arrCol / (this.coefficient * (3 + 5)) * (this.coefficient * 5 + 1); int num_2 = this.m_arrCol % (this.coefficient * (3 + 5)); if (num_2 > 0) { if (num_2 < 3 * this.coefficient) { num_2 = 1; } else { num_2 = num_2 - 3 * this.coefficient + 2; } } pos_1 = new Vector3[num_1 + num_2]; pos_2 = new Vector3[num_1 + num_2]; int rn = this.m_arrRow / (this.coefficient * (3 + 5)); this.m_lines = new GameObject[rn, 2]; for (int i = 4 * this.coefficient; i < this.m_arrRow;) { int index_1 = 0; int index_2 = 0; int r_1 = i - 4 * this.coefficient; int r_2 = i + 4 * this.coefficient; bool flag_1 = true; bool flag_2 = false; if (r_2 >= this.m_arrRow) { flag_1 = false; } for (int j = 0; j < this.m_arrCol;) { if (j % (this.coefficient * (3 + 5)) == 0) { flag_2 = !flag_2; if (flag_2) { pos_1[index_1++] = this.m_array[i, j]; if (flag_1) { pos_2[index_2++] = this.m_array[i, j]; } } else { pos_1[index_1++] = this.m_array[r_1, j]; if (flag_1) { pos_2[index_2++] = this.m_array[r_2, j]; } } j += 3 * this.coefficient; } else { if (flag_2) { pos_1[index_1++] = this.m_array[r_1, j]; if (flag_1) { pos_2[index_2++] = this.m_array[r_2, j]; } } else { pos_1[index_1++] = this.m_array[i, j]; if (flag_1) { pos_2[index_2++] = this.m_array[i, j]; } } ++j; } } this.CreatLine(i / (2 * 4 * this.coefficient), 0, pos_1); if (flag_1) { this.CreatLine(i / (2 * 4 * this.coefficient), 1, pos_2); } i += (4 * this.coefficient * 2); } } /// /// 创建网格线 /// private void CreatLine(int row, int col, Vector3[] pos) { if(this.m_lines[row, col] != null) { GameObject.Destroy(this.m_lines[row, col]); } this.m_lines[row, col] = new GameObject(); LineRenderer _lineRenderer = this.m_lines[row, col].AddComponent(); _lineRenderer.material = new Material(Shader.Find("Particles/Additive")); _lineRenderer.SetColors(this.gridColor, this.gridColor); _lineRenderer.SetWidth(this.gridLine, this.gridLine); _lineRenderer.useWorldSpace = true; _lineRenderer.SetVertexCount(pos.Length); for (int i = 0; i < pos.Length; ++i) { _lineRenderer.SetPosition(i, pos[i]); } this.m_lines[row, col].name = "CreateLine " + row + " " + col; } void Update() { if (Input.GetMouseButtonDown(0)) { RaycastHit hit; Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(ray, out hit)) { //Debug.LogError("select point " + hit.point); this.CreatMesh(hit.point); } } } /// /// 创建面片 /// public void CreatMesh(Vector3 pos) { if(this.meshCaches.Count == 0) this.m_mesh.name = "CreateMesh"; this.DrawMesh(pos); } /// /// 绘制面片 /// private void DrawMesh(Vector3 pos) { try { KeyValuePair rw = this.GetRowColByPos(pos); if (rw.Key > this.m_arrRow || rw.Value > this.m_arrCol) { Debug.LogError("选择的区域已出边界！"); return; } MeshFilter filter = this.m_mesh.GetComponent(); if (filter == null) filter = this.m_mesh.AddComponent(); Mesh mesh = filter.mesh; MeshRenderer renderer = this.m_mesh.GetComponent(); if (renderer == null) renderer = this.m_mesh.AddComponent(); if (renderer.material == null) { Material material = new Material(Shader.Find("Diffuse")); renderer.sharedMaterial = material; } Mesh CacheMesh = TryGetMesh(rw); if (CacheMesh != null && CacheMesh != mesh) { filter.mesh = CacheMesh; this.CurrenMesh = CacheMesh; } else if (mesh == null || CacheMesh == null) { if (this.m_meshType == GridShapeType.RegularHexagon) { mesh = RegularHexagonGrid.Create(pos).mesh; } else { mesh = SquareGrid.Create(pos).mesh; } if (mesh == null) { Debug.LogError("该区域不能选择！"); return; } if (mesh.vertices.Length > 300) Debug.LogErrorFormat("顶点数据过大 {0} :{1}", rw.Key, rw.Value); mesh.RecalculateNormals(); mesh.RecalculateBounds(); filter.mesh = mesh; this.CurrenMesh = mesh; this.TryAddMesh(rw, mesh); } } catch (Exception ex) { Debug.LogException(ex); } } /// /// 根据世界坐标位置获取对应网格行列 /// public KeyValuePair GetRowColByPos(Vector3 pos) { TerrainData data = this.m_terrian.terrainData; int col = Mathf.FloorToInt(pos.x / data.heightmapScale.x); int row = Mathf.FloorToInt(pos.z / data.heightmapScale.z); int ncol = col; int nrow = row; switch (m_meshType) { case GridShapeType.Square: { ncol = col / (this.coefficient - 1) * (this.coefficient - 1); nrow = row / (this.coefficient - 1) * (this.coefficient - 1); break; } case GridShapeType.RegularHexagon: { int rn = row / (2 * 4 * this.coefficient); int cn = (col - (this.coefficient * 3 + this.coefficient * 5 / 2 + this.coefficient * 5 % 2)) / ((3 + 5) * this.coefficient); int x_1 = this.coefficient * 2 * 4 * rn + 4 * this.coefficient; int x_2 = x_1 - 4 * this.coefficient; int x_3 = x_1 + 4 * this.coefficient; int y_1 = (cn + cn % 2) * ((3 + 5) * this.coefficient) + (this.coefficient * 3 + this.coefficient * 5 / 2 + this.coefficient * 5 % 2); int y_2 = y_1 + (1 - 2 * (cn % 2)) * ((3 + 5) * this.coefficient); int y_3 = y_1 + (1 - 2 * (cn % 2)) * ((3 + 5) * this.coefficient); float dis_1 = MAXDIS; float dis_2 = MAXDIS; float dis_3 = MAXDIS; if (x_1 < this.m_arrRow && y_1 < this.m_arrCol) { dis_1 = Vector3.Distance(pos, this.m_array[x_1, y_1]); } if (x_2 < this.m_arrRow && y_2 < this.m_arrCol) { dis_2 = Vector3.Distance(pos, this.m_array[x_2, y_2]); } if (x_3 < this.m_arrRow && y_3 < this.m_arrCol) { dis_3 = Vector3.Distance(pos, this.m_array[x_3, y_3]); } if (dis_1 > (MAXDIS - 1) && dis_2 > (MAXDIS - 1) && dis_3 > (MAXDIS - 1)) { nrow = this.m_arrRow; ncol = this.m_arrCol; } else { if (dis_1

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