/// <summary>
/// Performs tranformation of the given point in local space to world space.
/// </summary>
/// <param name="transformComponent">The transform component.</param>
/// <param name="point">Local space point.</param>
/// <returns>World space point.</returns>
public static Vector3 LocalToWorld(this TransformComponent transformComponent, Vector3 point)
{
Vector3 result;
Vector3.Transform(ref point, ref transformComponent.WorldMatrix, out result);
return result;
}
/// <summary>
/// Performs tranformation of the given point in world space to local space.
/// </summary>
/// <param name="transformComponent">The transform component.</param>
/// <param name="point">World space point.</param>
/// <param name="result">Local space point.</param>
public static void WorldToLocal(this TransformComponent transformComponent, ref Vector3 point, out Vector3 result)
{
Matrix worldMatrixInv;
Matrix.Invert(ref transformComponent.WorldMatrix, out worldMatrixInv);
Vector3.Transform(ref point, ref worldMatrixInv, out result);
}
/// <summary>
/// Performs tranformation of the given point in local space to world space.
/// </summary>
/// <param name="transformComponent">The transform component.</param>
/// <param name="point">Local space point.</param>
/// <param name="result">World space point.</param>
public static void LocalToWorld(this TransformComponent transformComponent, ref Vector3 point, out Vector3 result)
{
Vector3.Transform(ref point, ref transformComponent.WorldMatrix, out result);
}
private bool RecurseCheckChildren(FastCollection <TransformComponent> children, TransformComponent targetTransform)
{
foreach (var transformComponentChild in children)
{
if (transformComponentChild.Parent == null)
{
continue; // skip this case, the parent has not updated it's list yet
}
if (!RecurseCheckChildren(transformComponentChild.Children, targetTransform))
{
return(false);
}
if (targetTransform.Entity.Id != transformComponentChild.Entity.Id)
{
continue;
}
return(false);
}
return(true);
}
