Unity3d 利用Mesh繪製幾何圖形實現
阿新 • • 發佈：2019-02-18
一、建立一個GameObject,並在上面掛兩個元件(MeshFilter、MeshRenderer)
二、新建個指令碼，並掛在剛才建立的GameObject上
using UnityEngine; using System.Collections;public class MeshImage : MonoBehaviour
{
void Start()
{
MeshRectangle();
}
// 建立一個矩形
void MeshRectangle()
{
MeshFilter mFilter = gameObject.GetComponent();
MeshRenderer mRen = gameObject.GetComponent();
//矩形的四個頂點座標
Vector3[] vertices = new Vector3[4];
vertices[0] = new Vector3(0, 0, 0);
vertices[1] = new Vector3(500, 0, 0);
vertices[2] = new Vector3(500, 500, 0);
vertices[3] = new Vector3(0, 500, 0);
//三角形頂點索引
int[] triangles = new int[6]{0, 1, 2, 2, 3, 0};
//每個頂點的法線
Vector3[] normals = new Vector3[4];
normals[0] = new Vector3(0, 0, -5);
normals[1] = new Vector3(0, 0, -5);
normals[2] = new Vector3(0, 0, -5);
normals[3] = new Vector3(0, 0, -5);
//UV貼圖座標
Vector2[] uvs = new Vector2[4];
uvs[0] = new Vector2(0, 0);
uvs[1] = new Vector2(1, 0);
uvs[2] = new Vector2(1, 1);
uvs[3] = new Vector2(0, 1);
//頂點顏
Color32[] colors32 = new Color32[4];
colors32[0] = new Color32(255, 0, 0, 255);
colors32[1] = new Color32(255, 0, 0, 255);
colors32[2] = new Color32(255, 0, 0, 255);
colors32[3] = new Color32(255, 0, 0, 255);
Mesh mesh = new Mesh();
mesh.hideFlags = HideFlags.DontSave;
mesh.vertices = vertices;
mesh.triangles = triangles;
mesh.colors32 = colors32;
mesh.uv = uvs;
mesh.normals = normals;
mFilter.mesh = mesh;
}
}
物件層次結構
執行效果(PS: 自己通過調整相機位置從不同角度去觀察)
