Unity之最简小白网格教程

最新推荐文章于 2025-09-01 16:37:55 发布

原创最新推荐文章于 2025-09-01 16:37:55 发布 · 533 阅读

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本文详细介绍了如何使用Unity创建一个基本的四边形网格，包括设置顶点、连接顶点形成三角形、添加法线和UV坐标。适合初学者了解3D模型基础。

创建网格

Mesh CurMesh = new Mesh();
CurMesh.name = "CreateMesh";

创建顶点

Vector3[] vectices = new Vector3[4] {
new Vector2(0,0),
new Vector2(0,1),
new Vector2(1,1),
new Vector2(1,0)
};
CurMesh.vertices = vectices;

连接顶点

int[] TriangleIndexs = new int[6] { 0, 1, 3, 3, 1, 2 };//简写方式
/* TriangleIndexs[0] = 0;
TriangleIndexs[1] = 1;
TriangleIndexs[2] = 3;
TriangleIndexs[3] = 3;
TriangleIndexs[4] = 1;
TriangleIndexs[5] = 2;*/
CurMesh.triangles = TriangleIndexs;//连接顶点的线需要3的倍数，四个顶点需要两个三角形

添加法线

Z轴为负一

Z轴为正一

图片的xyz写的不是很好，哈哈哈哈哈哈

Vector3[] tempNormals = new Vector3[4];//顶点有多少个这里就有多少个
tempNormals[0] = new Vector3(0, 0, -1);
tempNormals[1] = new Vector3(0, 0, -1);
tempNormals[2] = new Vector3(0, 0, -1);
tempNormals[3] = new Vector3(0, 0, -1);
CurMesh.normals = tempNormals;//法线是为光照的

添加UV

Vector2[] uvs = new Vector2[4];//UV没有设置的话就会影响贴图
uvs[0] = new Vector2(0, 0);
uvs[1] = new Vector2(0, 1);
uvs[2] = new Vector2(1, 1);
uvs[3] = new Vector2(1, 0);
CurMesh.uv = uvs;//顶点有多少个这个就有多少个

最后

GetComponent<MeshFilter>().mesh = CurMesh;//把创建的网格给指定对象

完整代码

Mesh CurMesh = new Mesh();
CurMesh.name = "CreateMesh";
        //为Mesh增加顶点
        Vector3[] vectices = new Vector3[4] {
new Vector2(0,0),
new Vector2(0,1),
new Vector2(1,1),
new Vector2(1,0)
};
        CurMesh.vertices = vectices;

//连接Mesh里的顶点
int[] TriangleIndexs = new int[6] { 0, 1, 3, 3, 1, 2 };
/* TriangleIndexs[0] = 0;
TriangleIndexs[1] = 1;
TriangleIndexs[2] = 3;
TriangleIndexs[3] = 3;
TriangleIndexs[4] = 1;
TriangleIndexs[5] = 2;*/
CurMesh.triangles = TriangleIndexs;

//为Mesh增加法线
Vector3[] tempNormals = new Vector3[4];
tempNormals[0] = new Vector3(0, 0, -1);
tempNormals[1] = new Vector3(0, 0, -1);
tempNormals[2] = new Vector3(0, 0, -1);
tempNormals[3] = new Vector3(0, 0, -1);
CurMesh.normals = tempNormals;

Vector2[] uvs = new Vector2[4];
uvs[0] = new Vector2(0, 0);
uvs[1] = new Vector2(0, 1);
uvs[2] = new Vector2(1, 1);
uvs[3] = new Vector2(1, 0);
CurMesh.uv = uvs;
GetComponent<MeshFilter>().mesh = CurMesh;