/// <summary>
/// パーティクルを追加する
/// </summary>
/// <param name="position"></param>
/// <param name="size"></param>
/// <param name="color"></param>
/// <param name="materialID"></param>
/// <returns></returns>
public RefParticle AddParticle(Vector2 position, float size, Color color, string materialID)
{
var p = new RefParticle(GetNextUID(), position, size, color, materialID);
_particles.Add(p);
return(p);
}
/// <summary>
/// パーティクル参照を元にエッジを追加する
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="width"></param>
/// <param name="color"></param>
/// <param name="materialID"></param>
/// <returns></returns>
public RefEdge AddEdge(RefParticle a, RefParticle b, float width, Color color, string materialID)
{
Assert.IsNotNull(a);
Assert.IsNotNull(b);
var e = new RefEdge(GetNextUID(), a.uid, b.uid, width, color, materialID);
_edges.Add(e);
return(e);
}
/// <summary>
/// 指定したuidに紐付いているパーティクルを削除する
/// </summary>
/// <param name="uid"></param>
public void RemoveParticle(RefParticle p)
{
if (p == null)
{
return;
}
// 紐付いているエッジを削除する
var result = FindEdgesWithParticle(p.uid);
for (var i = 0; i < result.Count; ++i)
{
_edges.Remove(result[i]);
}
_particles.Remove(p);
}
/// <summary>
/// 指定した座標にヒットした最も近いパーティクルを返す
/// </summary>
/// <param name="s"></param>
/// <param name="position"></param>
/// <returns></returns>
public static RefParticle HitParticle(RefStructure s, Vector2 position)
{
float _minDist = float.MaxValue;
RefParticle nearestHitten = null;
for (var i = 0; i < s._particles.Count; ++i)
{
var t = s._particles[i];
var dist = (t.position - position).magnitude;
if (_minDist > dist && dist <= t.size)
{
_minDist = dist;
nearestHitten = t;
}
}
return(nearestHitten);
}
