C#代碼創建3D模型

本文轉載自查看原文 2014-10-24 17:48 8562 圖形學/ unity/ Unity 技術積累/ 優化/ Unity 插件日志

Demo 1:創建三角形

示例代碼

構建一個只包含單個三角形及紋理坐標的網格

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 };
    }
}

創建出三角形

可以看到只有單個三角形

頂點信息

從下圖可以看出，共有1個三角形，3個頂點

Demo2：二個三角形

示例代碼

構建兩個三角形及紋理坐標的網格

using UnityEngine;
using System.Collections;

public class MyMesh : MonoBehaviour
{
    void Start()
    {
        MeshFilter mf = GetComponent<MeshFilter>();
        Mesh mesh = new Mesh();
        mf.mesh = mesh;
        //頂點[決定繪制出來圖片的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) };
        //三角形頂點索引的順序[3的倍數]
        mesh.triangles = new int[6] { 0, 2, 1, 2, 3, 1 };
        //法線
        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紋理坐標
        mesh.uv = new Vector2[4] { new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, 1), new Vector2(1, 1) };
    }
}