/// <summary>
/// Retuns a dictionary of paths and the times at which each path has a keyframe for the given
/// attribute. Only paths rooted under the given rootPath are considered.
/// </summary>
public Dictionary <string, double[]> ComputeKeyFrames(string rootPath, string attribute)
{
var keys = new Dictionary <string, double[]>();
var prim = GetUsdPrim(GetSdfPath(rootPath));
if (!prim)
{
throw new ArgumentException("rootPath does not exist");
}
var sdfRootPath = GetSdfPath(rootPath);
var tfAttrName = new pxr.TfToken(attribute);
foreach (var child in Stage.GetAllPrims())
{
if (child.GetPath() == SdfPath.AbsoluteRootPath())
{
Console.WriteLine("Was abs: {0}", child.GetPath());
continue;
}
if (child.GetTypeName() != "Mesh")
{
continue;
}
Console.WriteLine(child.GetPath());
if (!child.GetPath().HasPrefix(sdfRootPath))
{
continue;
}
var stdDoubleVector = child.GetAttribute(tfAttrName).GetTimeSamples();
if (stdDoubleVector.Count == 0)
{
continue;
}
double[] times = new double[stdDoubleVector.Count];
stdDoubleVector.CopyTo(times);
keys.Add(child.GetPath(), times);
}
return(keys);
}
/// <summary>
/// Searches the USD Stage to find prims which either match the schema type name or those
/// which are derived from it.
/// </summary>
/// <typeparam name="T">
/// A type which inherits from SampleBase, adorned with a UsdSchemaAttribute.
/// </typeparam>
/// <returns>
/// Returns a collection which will read each prim found and return the requested SampleBase
/// object type.
/// </returns>
/// <remarks>Internally, this method reuses a single object while reading to minimize garbage
/// generated during iteration.</remarks>
public SampleCollection <T> ReadAll <T>() where T : SampleBase, new()
{
return(ReadAll <T>(rootPath: SdfPath.AbsoluteRootPath()));
}
/// <summary>
/// Searches the USD Stage to find prims which either match the schema type name declared
/// for the given sample type, or those which derive from it.
/// </summary>
/// <typeparam name="T">
/// A type which inherits from SampleBase, adorned with a UsdSchemaAttribute.
/// </typeparam>
/// <returns>
/// An iterable collection of the paths discovered
/// </returns>
public SdfPath[] Find <T>() where T : SampleBase, new()
{
return(Find <T>(rootPath: SdfPath.AbsoluteRootPath()));
}