如何获取unity3d 的mesh属性
发布网友
发布时间：2022-04-22 08:24
共2个回答
热心网友
时间：2022-06-18 13:54
建模，就是建网格；建网格，就是画些三角形；画个三角形呢，也就是定位三个点。
不过首先了解下Unity中网格的特性。Unity中的对象就是GameObject了，每个GameObject都可以有一个MeshFilter组件（也可以没有），该组件又有mesh属性（这个一定有），而该属性又有个vertives，也就是一个Vector3数组，储存着顶点信息。
下面就是写个脚本来看看mesh里的东东都是些什么了。
代码功能即：点击Tab键轮询场景中所有GameObject，以获取其MeshFilter.mesh，并在GUI中显示mesh的主要属性内容顶点坐标，法线，三角形的绘制序列等等。（代码写的很仓促，只为了显示内容。）
代码直接拖到mainCamera中即可。可在场景中建几个Cube、Plane什么的看看。
如果有什么需要的unity插件的话可以到纳金网论坛上去找http://www.narkii.com/club/forum-51-1.html
热心网友
时间：2022-06-18 13:54
代码直接拖到mainCamera中即可。可在场景中建几个Cube、Plane什么的看看。
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class MeshPrinter : MonoBehaviour {
private string text_name;
private string text_vertices;
private string text_normals;
private string text_triangles;
private string text_uv;
private string text_tangents;
public MeshFilter mCurrentFilter;
public List<MeshFilter> targets;
void Start () {
targets = new List<MeshFilter>();
AddAllTargets();
mCurrentFilter = null;
}
void Update () {
if(Input.GetKeyUp(KeyCode.Tab)){
TargetMesh();
FillText();
}
}
void OnGUI(){
float _x = 10;
Vector2 textSize = GUI.skin.label.CalcSize (new GUIContent(text_name));
GUI.Label(new Rect(_x, 10 ,textSize.x, textSize.y), text_name);
textSize = GUI.skin.label.CalcSize (new GUIContent(text_triangles));
GUI.Label(new Rect(_x, 30 ,textSize.x, textSize.y), text_triangles);
_x += textSize.x +20;
textSize = GUI.skin.label.CalcSize (new GUIContent(text_vertices));
GUI.Label(new Rect(_x, 30 ,textSize.x, textSize.y), text_vertices);
_x += textSize.x +20;
textSize = GUI.skin.label.CalcSize (new GUIContent(text_normals));
GUI.Label(new Rect(_x, 30 ,textSize.x, textSize.y), text_normals);
_x += textSize.x +20;
textSize = GUI.skin.label.CalcSize (new GUIContent(text_tangents));
GUI.Label(new Rect(_x, 30 ,textSize.x, textSize.y), text_tangents);
_x += textSize.x +20;
textSize = GUI.skin.label.CalcSize (new GUIContent(text_uv));
GUI.Label(new Rect(_x, 30 ,textSize.x, textSize.y), text_uv);
}
public void AddAllTargets(){
GameObject[] gos = GameObject.FindObjectsOfType(typeof(GameObject)) as GameObject[];
foreach(GameObject go in gos)
if(go.GetComponent<MeshFilter>() != null)
AddTarget( go.GetComponent<MeshFilter>());
}
public void AddTarget(MeshFilter target){
targets.Add(target);
}
private void TargetMesh(){
if(mCurrentFilter == null){
mCurrentFilter = targets[0];
}else{
int index = targets.IndexOf(mCurrentFilter);
if(index < targets.Count-1){
index ++;
}else{
index = 0;
}
mCurrentFilter = targets[index];
}
}
private void FillText(){
text_name = "Name: " + mCurrentFilter.gameObject.name;
Mesh mesh = mCurrentFilter.mesh;
int size = mesh.vertexCount;
text_vertices = "vertices: "+ size + "\n";
for(int i = 0; i<size; i++){
text_vertices += i + ": " + mesh.vertices[i][0]+","+mesh.vertices[i][1]+","+mesh.vertices[i][2]+";\n";
}
size = mesh.normals.Length;
text_normals = "normals: " + size + "\n";
for(int i = 0; i<size; i++){
text_normals += mesh.normals[i].x +","+ mesh.normals[i].y +","+mesh.normals[i].z +";\n";
}
size = mesh.triangles.Length ;
text_triangles = "triangles: " + size + "\n";
for(int i = 0; i<size/3; i++){
text_triangles += mesh.triangles [3*i] +","+ mesh.triangles [3*i+1] +","+mesh.triangles [3*i+2] +";\n";
}
size = mesh.uv.Length ;
text_uv = "uv: " + size + "\n";
for(int i = 0; i<size; i++){
text_uv += mesh.uv [i][0] +","+ mesh.uv [i][1] +";\n";
}
size = mesh.tangents.Length ;text_tangents = "tangents: " + size + "\n";
for(int i = 0; i<size; i++){
text_tangents += mesh.tangents[i][0] + ", "+ mesh.tangents[i][1] + ", "+mesh.tangents[i][2] + ", "+mesh.tangents[i][3] +";\n";
}
}
}
