How can I make OnDrawGizmos and OnDrawGizmosSelected functions to run the code inside with a button click?

Question

using UnityEngine;
using System.Collections;

public class CurvedLinePoint : MonoBehaviour
{
    [HideInInspector] public bool showGizmo = true;
    [HideInInspector] public float gizmoSize = 0.1f;
    [HideInInspector] public Color gizmoColor = new Color(1, 0, 0, 0.5f);

    void OnDrawGizmos()
    {
        if (ResetLineRendererPositions.hasReseted == false)
        {
            if (showGizmo == true)
            {
                Gizmos.color = gizmoColor;

                Gizmos.DrawSphere(this.transform.position, gizmoSize);
            }
        }
    }

    //update parent line when this point moved
    void OnDrawGizmosSelected()
    {
        if (ResetLineRendererPositions.hasReseted == false)
        {
            CurvedLineRenderer curvedLine = this.transform.parent.GetComponent<CurvedLineRenderer>();

            if (curvedLine != null)
            {
                curvedLine.Update();
            }
        }
    }
}

Then I created two scripts one is editor type with two buttons. One to reset the linerenderer positions and one to generate the positions :

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

public class ResetLineRendererPositions : MonoBehaviour
{
    public LineRenderer lineRenderer;
    public static bool hasReseted = false;

    public void ResetLinerendererPositions()
    {
        lineRenderer.positionCount = 0;
        hasReseted = true;
    }

    public void GenerateLineRendererPositions()
    {
        hasReseted = false;
    }
}

And

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

[CustomEditor(typeof(ResetLineRendererPositions))]
public class ResetLineRendererPositionsButton : Editor
{
    public override void OnInspectorGUI()
    {
        ResetLineRendererPositions myScript = (ResetLineRendererPositions)target;
        if (GUILayout.Button("Reset Linerenderer Positions"))
        {
            myScript.ResetLinerendererPositions();
        }

        GUILayout.Space(30);

        if (GUILayout.Button("Generate Linerenderer Positions"))
        {
            myScript.GenerateLineRendererPositions();
        }
    }
}

The buttons are working the problem is when I click on the button "Generate Linerenderer Positions" then I have to select the linerenderer object in the hierarchy to make it take affect and draw the gizmos.

I want that when I click the "Generate Linerenderer Positions" button it will automatic run the code in the OnDrawGizmos and OnDrawGizmosSelected functions.

Answer 1

The buttons are working the problem is when I click on the button "Generate Linerenderer Positions" then I have to select the linerenderer object in the hierarchy to make it take affect and draw the gizmos.

OnDrawGizmosSelected() is only called by the Editor when you select that object or one of its parents. Although you could have your button call OnDrawGizmosSelected(), that's not what OnDrawGizmosSelected() is for.

Also, OnDrawGizmos()/OnDrawGizmosSelected() are only intended for drawing Gizmos and other Unity Editor markup. You should not be calling other code, such as curvedLine.Update(), from within either of these functions.

It seems like you should have the GUI button call curvedLine.Update(), rather than involving OnDrawGizmosSelected().