DebugMeshGizmo.cs

DebugMeshGizmo.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;

// NOTES
// - DrawMesh() doesn't clear batches
// - DrawMeshNow() can have weird lighting behind some transparent things
// - EditorUtility.SetDirty() can be used to force batch clear for DrawMesh() if you have to use it
// - DrawGizmos() is called in addition to DrawGizmosSelected()
// - OnPostRender() wont show any DrawMeshNow() calls
// - no known way to check dirty state reliably (reflection extracted value seems unreliable)
// - OnValidate() not called in editor?
// - Camera.onPreCull and SceneView.onGui delegate same batching issues (unless setdirty)

[ExecuteInEditMode]
[SelectionBase]
public class Node
    : MonoBehaviour
{
    public GameObject renderPrefab;
    
#if UNITY_EDITOR
    public void OnDrawGizmos()
    {
        if (UnityEditor.Selection.Contains(gameObject))
        {
            Gizmos.color = new Color(1.0f, 1.0f, 1.0f, 0.5f);
            Gizmos.matrix = transform.localToWorldMatrix;
            Gizmos.DrawCube(Vector3.up * 0.5f, Vector3.one * 1.0f);

            Gizmos.color = Color.white;
            Gizmos.matrix = transform.localToWorldMatrix;
            Gizmos.DrawWireCube(Vector3.up * 0.5f, Vector3.one * 1.0f);
        }
        else
        {
            Gizmos.color = new Color(0.0f, 0.0f, 0.0f, 0.0f);
            Gizmos.matrix = transform.localToWorldMatrix;
            Gizmos.DrawCube(Vector3.up * 0.5f, Vector3.one * 0.5f);
        }
    }

    public void OnRenderObject()
    {
        if (Application.isPlaying)
            return;
        if (renderPrefab == null)
            return;

        var meshRenderer = renderPrefab.GetComponentInChildren<MeshRenderer>();
        if (meshRenderer != null)
        {
            var meshFilter = renderPrefab.GetComponentInChildren<MeshFilter>();
            var mesh = meshFilter.sharedMesh;
            var material = meshRenderer.sharedMaterial;

            material.SetPass(0);
            Graphics.DrawMeshNow(mesh, transform.position, transform.rotation);
        }

        var meshSkinnedRenderer = renderPrefab.GetComponentInChildren<SkinnedMeshRenderer>();
        if (meshSkinnedRenderer != null)
        {
            var mesh = meshSkinnedRenderer.sharedMesh;
            var material = meshSkinnedRenderer.sharedMaterial;
            
            material.SetPass(0);
            Graphics.DrawMeshNow(mesh, transform.position, transform.rotation);
        }
    }
#endif
}