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

[RequireComponent(typeof(MeshRenderer))]
[RequireComponent(typeof(MeshFilter))]
[ExecuteInEditMode]
public class ProceduralMesh : MonoBehaviour {

    private Mesh _mesh;
    private void Awake() {
       
    }

    private void ValidateMeshCreated() {
        if(_mesh == null) {
            _mesh = new Mesh();
            var filter = GetComponent<MeshFilter>();
            filter.sharedMesh = _mesh;
        }
    }

    public void Rebuild(MeshData data, bool recalculateBounds = true) {
        ValidateMeshCreated();
        _mesh.Clear();
        _mesh.SetVertices(data.Vertices);
        _mesh.SetColors(data.Colors);

        for (int i = 0; i < data.Submeshes.Count; ++i)
        {
            var submesh = data.Submeshes[i];
            _mesh.SetIndices(submesh.Indices, submesh.Topology, i, recalculateBounds, submesh.BaseVertex);
        }

        if (recalculateBounds) {
            _mesh.RecalculateBounds();
        }
    }
}