RaycastHit2D.centroid

説明

キャストに使用されるプリミティブの重心

When the RaycastHit2D is returned from line or ray casting, the centroid is identical to the return point property. However when using cast methods that use a geometry shape (as opposed to a simple point) such as circle or box casting, the centroid is the center of the respective shape when it is in contact with the returned point.

centroid は、接触点と重心からキャストする形状の位置を把握するのに便利です。キャストしたときに、位置は指定した形状の回転も考慮しなければいけないことに注意してください。

using UnityEngine;

public class Example : MonoBehaviour
{
    // A stationary planet
    public GameObject planet;
    // The satellite is moving around the planet
    public GameObject satellite;

    void Update()
    {
        RaycastHit2D hit = Physics2D.CircleCast(satellite.transform.position, 10.0f, planet.transform.position);

        if (hit.collider != null)
        {
            // Draws a line from the planet to the centre of the satellite that was hit as the satellite moves
            Debug.DrawLine(planet.transform.position, hit.centroid, Color.yellow);
        }
    }
}

See Also: point, Physics2D.Raycast, Physics2D.Linecast, Physics2D.CircleCast & Physics2D.BoxCast.