public static Vector2d Rotate(Vector2d vec, int angle)
{
Vector2d last;
FixedPoint cos = CustomMath.Cos(angle);
FixedPoint sin = CustomMath.Sin(angle);
last.x = vec.x * cos + vec.y * sin;
last.y = vec.x * -sin + vec.y * cos;
return(last);
}
public FPObb(Vector2d pos, Vector2d size, int angle)
{
center = pos;
e = size * new FixedPoint(0.5f);
ang = angle;
/// <summary>
/// 2D环境中的角度，转为世界坐标中的xy方向的向量
/// </summary>
u = new Vector2d[2];
u[0] = new Vector2d(CustomMath.Cos(angle), -CustomMath.Sin(angle));
u[1] = new Vector2d(CustomMath.Sin(angle), CustomMath.Cos(angle));
}
public static Vector2d GetVector(int angle)
{
return(new Vector2d(CustomMath.Sin(angle), CustomMath.Cos(angle)));
}