Drawing with VertexHelper Not Visible in Scene View, Only Appearing in Game View

Unity Engine
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1

Main Bug:

I am drawing a custom mesh using VertexHelper, but the drawing only appears in the Game View and not in the Scene View.

Code:

csharp

コードをコピーする

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

[ExecuteAlways]
public class UILineRenderer : Graphic
{
    [System.Serializable]
    public class LineData
    {
        public Vector2 startPoint;
        public Vector2 endPoint;
    }

    public List<LineData> lines = new List<LineData>();

    public float thickness = 5f;
    public Color lineColor = Color.white;
    public Color two = Color.blue;

    protected override void OnPopulateMesh(VertexHelper vh)
    {
        vh.Clear();

        // Draw each line
        foreach (var line in lines)
        {
            DrawLine(vh, line);
        }
    }

    void DrawLine(VertexHelper vh, LineData line)
    {
        Vector2 direction = (line.endPoint - line.startPoint).normalized;
        Vector2 normal = new Vector2(-direction.y, direction.x) * (thickness * 0.5f);

        Vector2[] outerVertices = new Vector2[2];
        Vector2[] innerVertices = new Vector2[2];

        outerVertices[0] = line.startPoint + normal;
        outerVertices[1] = line.endPoint + normal;
        innerVertices[0] = line.startPoint - normal;
        innerVertices[1] = line.endPoint - normal;

        // Add vertices as a quad
        AddQuad(vh, outerVertices[0], innerVertices[0], innerVertices[1], outerVertices[1], new Color[] { lineColor, lineColor, two, two });
    }

    void AddQuad(VertexHelper vh, Vector2 v1, Vector2 v2, Vector2 v3, Vector2 v4, Color[] color)
    {
        int idx = vh.currentVertCount;

        vh.AddVert(v1, color[0], Vector2.zero);
        vh.AddVert(v2, color[1], Vector2.zero);
        vh.AddVert(v3, color[2], Vector2.zero);
        vh.AddVert(v4, color[3], Vector2.zero);

        vh.AddTriangle(idx, idx + 1, idx + 2);
        vh.AddTriangle(idx + 2, idx + 3, idx);
    }
}

Regarding the Situation:

When I attach this script to a prefab and instantiate the prefab, it is rendered in both the Scene View and the Game View.

However, when I attach it directly to a GameObject and render it, it only appears in the Game View and not at all in the Scene View.

It’s acceptable if it works only in the Game View, but if anyone has resolved a similar issue, I would appreciate your guidance.

2

So you know, the tag 2D-Graphics is for 2D features such as Sprites, SpriteMask etc. It’s not for anything else such as UI etc. When you add any “2D-XXX” tag, your post appears in the 2D product area for the 2D team which isn’t correct.

I’ll change the tag to the generic “Graphics” tag which is more appropriate for you.

Thanks.

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