private void CircularPosition(int count,float radius, Vector2 centerPos)
{
float angle = 360.0f / count;
for(int i=0; i< count; i++)
{
float rad = angle * i * Mathf.Deg2Rad;
Vector2 pos = centerPos;
pos.x += radius * Mathf.Cos(rad);
pos.y += radius * Mathf.Sin(rad);
// pos則是以radius半徑圍繞centerPos點生成的座標
}
}