アセット

ソースコード

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

public class Test : MonoBehaviour
{
    public float m_size;
    public Color m_color = Color.white;
    public float m_lineWidth;
    public float m_offset;
    public float m_angle;

    private VectorLine m_line;
    private List<Vector2> m_points = new List<Vector2>( 5 );

    private void Start()
    {
        m_line = new VectorLine
        (
            name        : "line",
            points      : m_points,
            width       : m_size,
            lineType    : LineType.Continuous
        );
    }

    private void Update()
    {
        var rad1 = ( m_angle +   0 ) * Mathf.Deg2Rad;
        var rad2 = ( m_angle +  90 ) * Mathf.Deg2Rad;
        var rad3 = ( m_angle + 180 ) * Mathf.Deg2Rad;
        var rad4 = ( m_angle + 270 ) * Mathf.Deg2Rad;

        var topLeft     = new Vector3( -m_offset * Mathf.Cos( rad1 ), -m_offset * Mathf.Sin( rad1 ) );
        var topRight    = new Vector3( -m_offset * Mathf.Cos( rad2 ), -m_offset * Mathf.Sin( rad2 ) );
        var bottomRight = new Vector3( -m_offset * Mathf.Cos( rad3 ), -m_offset * Mathf.Sin( rad3 ) );
        var bottomLeft  = new Vector3( -m_offset * Mathf.Cos( rad4 ), -m_offset * Mathf.Sin( rad4 ) );

        m_points[ 0 ] = topLeft     ;
        m_points[ 1 ] = topRight    ;
        m_points[ 2 ] = bottomRight ;
        m_points[ 3 ] = bottomLeft  ;
        m_points[ 4 ] = topLeft     ;

        m_line.color = m_color;
        m_line.lineWidth = m_lineWidth;
        m_line.Draw();
    }
}