[Unity] [Example] Mesh

Mesh

Unity Mesh 관련 예제이다.

 

 

MeshDataPrinter.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MeshDataPrinter : MonoBehaviour
{
	[SerializeField]
	private MeshFilter _targetMesh;

    // Start is called before the first frame update
    void Start()
    {
		PrintMeshData(_targetMesh.mesh);
	}

	public static void PrintMeshData(Mesh mesh)
	{
		Debug.Log("vertices");
		foreach (var v in mesh.vertices)
		{
			Debug.Log(v);
		}

		Debug.Log("triangles");
		foreach (var t in mesh.triangles)
		{
			Debug.Log(t);
		}

		Debug.Log("normals");
		foreach (var n in mesh.normals)
		{
			Debug.Log(n);
		}

		Debug.Log("uvs");
		foreach (var u in mesh.uv)
		{
			Debug.Log(u);
		}

		Debug.Log("colors");
		foreach (var u in mesh.colors)
		{
			Debug.Log(u);
		}

		Debug.Log("tangents");
		foreach (var t in mesh.tangents)
		{
			Debug.Log(t);
		}

	}

}

 

 

MeshDataGenerator.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MeshGenerator : MonoBehaviour
{
	public float width = 5;
	public float height = 5;
	public Material material;

	public void Start()
	{
		MeshRenderer meshRenderer = gameObject.AddComponent<MeshRenderer>();
		meshRenderer.material = material;

		MeshFilter meshFilter = gameObject.AddComponent<MeshFilter>();

		Mesh mesh = new Mesh();

		Vector3[] vertices = new Vector3[4]
		{
			new Vector3(width, 0, 0),
			new Vector3(width, 0, -height),
			new Vector3(0, 0, -height),
			new Vector3(0, 0, 0)
		};
		mesh.vertices = vertices;

		int[] tris = new int[6]
		{
            // lower left triangle
            0, 1, 2,
            // upper right triangle
            0, 2, 3
		};
		mesh.triangles = tris;

		Vector3[] normals = new Vector3[4]
		{
			new Vector3(0, 1, 0),
			new Vector3(0, 1, 0),
			new Vector3(0, 1, 0),
			new Vector3(0, 1, 0)
		};
		mesh.normals = normals;

		Vector2[] uv = new Vector2[4]
		{
			new Vector2(0, 0.5f),
			new Vector2(0, 0.7f),
			new Vector2(0.2f, 0.7f),
			new Vector2(0.2f, 0.5f)
		};
		mesh.uv = uv;

		Vector4[] tangents = new Vector4[4]
		{
			new Vector4(-1.0f, 0, 0, -1.0f),
			new Vector4(-1.0f, 0, 0, -1.0f),
			new Vector4(-1.0f, 0, 0, -1.0f),
			new Vector4(-1.0f, 0, 0, -1.0f)
		};

		mesh.tangents = tangents;

		
		

		meshFilter.mesh = mesh;
		meshFilter.mesh.Optimize();

		meshFilter.mesh.RecalculateNormals();
		meshFilter.mesh.RecalculateTangents();
		meshFilter.mesh.RecalculateBounds();

		meshFilter.mesh.MarkModified();

		MeshDataPrinter.PrintMeshData(mesh);
	}
}