ColliderにGizmo.DrawMeshで色をつける

攻撃判定と当たり判定を見やすくするために作りました。まだ、改善余地がありそうです。

使い方

• SphereCollider
• BoxCollider
• CapsuleCollider

のついたobjectにアタッチするだけです。

一応、Colorで色と透明度を変更できます。

VisibleCollider.cs

using UnityEngine;

[RequireComponent(typeof(Collider))]
public class VisibleCollider : MonoBehaviour
{

    private Mesh SphereMesh;
    private Mesh CubeMesh;
    private Mesh CapsuleMesh;

    // Gizmoの色
    public Color color = new Color(1, 0, 0, 0.2f);

    void Awake()
    {

        // プリミティブのメッシュを取得
        SphereMesh = GetPrimitiveMesh(PrimitiveType.Sphere);
        CubeMesh = GetPrimitiveMesh(PrimitiveType.Cube);
        CapsuleMesh = GetPrimitiveMesh(PrimitiveType.Capsule);

    }

    void OnDrawGizmos()
    {

        SphereCollider sc = GetComponent<SphereCollider>();
        BoxCollider bc = GetComponent<BoxCollider>();
        CapsuleCollider cc = GetComponent<CapsuleCollider>();
        MeshCollider mc = GetComponent<MeshCollider>();

        Gizmos.color = color;

        // SphereCollider
        if (sc && sc.enabled)
        {

            Vector3 offset = transform.right * sc.center.x + transform.up * sc.center.y + transform.forward * sc.center.z;

            Vector3 scale = Vector3.one * sc.radius * 2;

            DrawMesh(SphereMesh, offset, scale);

        }

        // BoxCollider
        if (bc && bc.enabled)
        {

            Vector3 offset = transform.right * bc.center.x + transform.up * bc.center.y + transform.forward * bc.center.z;

            DrawMesh(CubeMesh, offset, bc.size);

        }

        // MeshCollider
        if (mc && mc.enabled) DrawMesh(mc.sharedMesh, Vector3.zero, transform.localScale);

        // CapsuleCollider
        if (cc && cc.enabled)
        {

            Vector3 offset = transform.right * cc.center.x + transform.up * cc.center.y + transform.forward * cc.center.z;

            Vector3 size = new Vector3(cc.radius / 0.5f, cc.height / 2, cc.radius / 0.5f);

            Quaternion dir;

            switch (cc.direction)
            {
                case 0:
                    dir = Quaternion.Euler(Vector3.forward * 90);
                    break;
                case 1:
                    dir = Quaternion.Euler(Vector3.up * 90);
                    break;
                case 2:
                    dir = Quaternion.Euler(Vector3.right * 90);
                    break;
                default:
                    dir = Quaternion.Euler(Vector3.zero);
                    break;
            }

            Gizmos.DrawMesh(CapsuleMesh, transform.position + offset, transform.rotation * dir, size);

        }


    }

    private Mesh GetPrimitiveMesh(PrimitiveType type)
    {

        GameObject gameObject = GameObject.CreatePrimitive(type);
        Mesh mesh = gameObject.GetComponent<MeshFilter>().sharedMesh;
        DestroyImmediate(gameObject);

        return mesh;

    }

    private void DrawMesh(Mesh mesh, Vector3 positionOffset, Vector3 scale)
    {

        Gizmos.DrawMesh(mesh, transform.position + positionOffset, transform.rotation, scale);

    }

}