C#代码创建3D模型

时间：2014-10-24 18:50:07 阅读：394 评论：0 收藏：0 [点我收藏+]

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Demo 1

构建一个只包含单个三角形及纹理坐标的网格

using UnityEngine;
using System.Collections;

public class MeshTest : MonoBehaviour
{
    void Start()
    {
        MeshFilter mf = GetComponent<MeshFilter>();
        Mesh mesh = new Mesh();
        mf.mesh = mesh;

        mesh.vertices = new Vector3[3] { new Vector3(0, 0, 0), new Vector3(0, 1, 0), new Vector3(1, 1, 0) };
        mesh.uv = new Vector2[3] { new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1) };
        mesh.triangles = new int[3] { 0, 1, 2 };
    }
}

可以看到只有单个三角形

从上图右中可以看出，共有1个三角形，3个顶点

Demo2

构建两个三角形及纹理坐标的网格

using UnityEngine;
using System.Collections;

public class MyMesh : MonoBehaviour
{
    void Start()
    {
        MeshFilter mf = GetComponent<MeshFilter>();
        Mesh mesh = new Mesh();
        mf.mesh = mesh;
        //顶点[决定绘制出来图片的scale]
        mesh.vertices = new Vector3[4] { new Vector3(0, 0, 0), new Vector3(1, 0, 0), new Vector3(0, 1, 0), new Vector3(1, 1, 0) };
        //三角形顶点索引的顺序[3的倍数]
        mesh.triangles = new int[6] { 0, 2, 1, 2, 3, 1 };
        //法线
        mesh.normals = new Vector3[4] { new Vector3(0, 0, -1), new Vector3(0, 0, -1), new Vector3(0, 0, -1), new Vector3(0, 0, -1), };
        //uv纹理坐标
        mesh.uv = new Vector2[4] { new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, 1), new Vector2(1, 1) };
    }
}