Unity3D中怎么动态生成平面网格-创新互联
这篇文章给大家介绍Unity3D中怎么动态生成平面网格，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。
实现脚本如下：
//PlaneBuilder.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
#region Editor
#if UNITY_EDITOR
using UnityEditor;
[CustomEditor(typeof(PlaneBuilder))]
public class PlaneBuilderEditor : Editor
{
public override void OnInspectorGUI()
{
PlaneBuilder builder = (PlaneBuilder)target;
EditorGUI.BeginChangeCheck();
base.OnInspectorGUI();
if (EditorGUI.EndChangeCheck())
{
builder.UpdateMesh();
}
if (GUILayout.Button("更新网格"))
{
builder.UpdateMesh();
}
}
}
#endif
#endregion Editor
[RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
public class PlaneBuilder : MonoBehaviour
{
[SerializeField]
private MeshFilter _meshFilter;
[SerializeField]
private MeshRenderer _meshRenderer;
///
/// 单元格大小
///
[SerializeField]
private Vector2 _cellSize = new Vector2(1, 1);
///
/// 网格大小
///
[SerializeField]
private Vector2Int _gridSize = new Vector2Int(2, 2);
public MeshRenderer MeshRenderer
{
get
{
return _meshRenderer;
}
}
public MeshFilter MeshFilter
{
get
{
return _meshFilter;
}
}
private void Awake()
{
_meshFilter = GetComponent();
_meshRenderer = GetComponent();
UpdateMesh();
}
public void UpdateMesh()
{
Mesh mesh = new Mesh();
//计算Plane大小
Vector2 size;
size.x = _cellSize.x * _gridSize.x;
size.y = _cellSize.y * _gridSize.y;
//计算Plane一半大小
Vector2 halfSize = size / 2;
//计算顶点及UV
List vertices = new List();
List uvs = new List();
Vector3 vertice = Vector3.zero;
Vector2 uv = Vector3.zero;
for (int y = 0; y < _gridSize.y + 1; y++)
{
vertice.z = y * _cellSize.y - halfSize.y;//计算顶点Y轴
uv.y = y * _cellSize.y / size.y;//计算顶点纹理坐标V
for (int x = 0; x < _gridSize.x + 1; x++)
{
vertice.x = x * _cellSize.x - halfSize.x;//计算顶点X轴
uv.x = x * _cellSize.x / size.x;//计算顶点纹理坐标U
vertices.Add(vertice);//添加到顶点数组
uvs.Add(uv);//添加到纹理坐标数组
}
}
//顶点序列
int a = 0;
int b = 0;
int c = 0;
int d = 0;
int startIndex = 0;
int[] indexs = new int[_gridSize.x * _gridSize.y * 2 * 3];//顶点序列
for (int y = 0; y < _gridSize.y; y++)
{
for (int x = 0; x < _gridSize.x; x++)
{
//四边形四个顶点
a = y * (_gridSize.x + 1) + x;//0
b = (y + 1) * (_gridSize.x + 1) + x;//1
c = b + 1;//2
d = a + 1;//3
//计算在数组中的起点序号
startIndex = y * _gridSize.x * 2 * 3 + x * 2 * 3;
//左上三角形
indexs[startIndex] = a;//0
indexs[startIndex + 1] = b;//1
indexs[startIndex + 2] = c;//2
//右下三角形
indexs[startIndex + 3] = c;//2
indexs[startIndex + 4] = d;//3
indexs[startIndex + 5] = a;//0
}
}
//
mesh.SetVertices(vertices);//设置顶点
mesh.SetUVs(0, uvs);//设置UV
mesh.SetIndices(indexs, MeshTopology.Triangles, 0);//设置顶点序列
mesh.RecalculateNormals();
mesh.RecalculateBounds();
mesh.RecalculateTangents();
_meshFilter.mesh = mesh;
}
#if UNITY_EDITOR
private void OnValidate()
{
if (null == _meshFilter)
{
_meshFilter = GetComponent();
}
if (null == _meshRenderer)
{
_meshRenderer = GetComponent();
if (null == _meshRenderer.sharedMaterial)
{
_meshRenderer.sharedMaterial = new Material(Shader.Find("Standard"));
}
}
}
#endif
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