BMesh Unity Sample

ProceduralMesh.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using static BMesh;

public class ProceduralMesh : MonoBehaviour
{
  public float tilling
  {
    get { return _tilling; }
    set
    {
      _tilling = value;
      UpdateBMesh();
    }
  }
  [SerializeField]
  private float _tilling = 1;

  public int width
  {
    get { return _width; }
    set
    {
      _width = value;
      UpdateBMesh();
    }
  }
  [SerializeField]
  private int _width = 15;

  public int height
  {
    get { return _height; }
    set
    {
      _height = value;
      UpdateBMesh();
    }
  }
  [SerializeField]
  private int _height = 15;

  BMesh mesh; // We keep a reference to the BMesh

  BMesh GenerateGrid()
  {
    // Create a new empty mesh
    BMesh bm = new BMesh();
    for (int j = 0; j < height; ++j)
    {
      for (int i = 0; i < width; ++i)
      {
        bm.AddVertex(i, 0, j); // vertex # i + j * w
        if (i > 0 && j > 0) bm.AddFace(i + j * width, i - 1 + j * width, i - 1 + (j - 1) * width, i + (j - 1) * width);
      }
    }
    return bm;
  }

  [ContextMenu("Update BMesh")]

  public void UpdateBMesh()
  {
    mesh = GenerateGrid();
    // Sin points
    foreach (Vertex v in mesh.vertices)
    {
      v.point.y = Mathf.Sin((v.point.x + v.point.z) * tilling); // Vertical displacement
    }
    // Set the current mesh filter to use our generated mesh
    BMeshUnity.SetInMeshFilter(mesh, GetComponent<MeshFilter>());
  }

  // Start is called before the first frame update
  public void Start()
  {
    UpdateBMesh();

  }
  // Update is called once per frame
  void Update()
  {

  }

  //! In the editor, draw some debug information about the mesh
  private void OnDrawGizmos()
  {
    Gizmos.matrix = transform.localToWorldMatrix;
    if (mesh != null) BMeshUnity.DrawGizmos(mesh);
  }
}

ProceduralMeshEditor.cs

using UnityEngine;
using UnityEditor;

[CustomEditor(typeof(ProceduralMesh))]
public class ProceduralMeshEditor : Editor
{
  SerializedProperty width;
  SerializedProperty height;
  SerializedProperty tilling;
  ProceduralMesh pm;

  void OnEnable()
  {
    width = serializedObject.FindProperty("_width");
    height = serializedObject.FindProperty("_height");
    tilling = serializedObject.FindProperty("_tilling");
    pm = (ProceduralMesh)target;
  }
  public override void OnInspectorGUI()
  {
    // base.OnInspectorGUI(); // draw the original ui code
    serializedObject.Update();
    GUILayout.BeginHorizontal();
    EditorGUILayout.PropertyField(width);
    EditorGUILayout.PropertyField(height);
    GUILayout.EndHorizontal();
    EditorGUILayout.PropertyField(tilling);


    pm.width = width.intValue;
    pm.height = height.intValue;
    pm.tilling = tilling.floatValue;

    serializedObject.ApplyModifiedProperties();


  }
}