void DrawAttributeInfo(Scene scene)
{
// Separator.
EditorGUILayout.LabelField("", GUI.skin.horizontalSlider);
EditorGUILayout.LabelField("Property Opinions", EditorStyles.boldLabel);
EditorGUILayout.LabelField("Name: " + selectedAttribute.GetName());
EditorGUILayout.LabelField("Type: " + selectedAttribute.GetTypeName().GetTfType().GetTypeName());
EditorGUILayout.LabelField("IsArray: " + selectedAttribute.GetTypeName().IsArray());
EditorGUILayout.LabelField("Composed Path: " + selectedAttribute.GetPath());
EditorGUILayout.LabelField("Variability: " + selectedAttribute.GetVariability());
EditorGUILayout.LabelField("Is Custom: " + selectedAttribute.IsCustom());
double upper, lower, hasSamples;
selectedAttribute.GetBracketingTimeSamples(scene.Time.GetValueOrDefault(), out lower, out upper,
out hasSamples);
if (hasSamples > 0)
{
EditorGUILayout.LabelField("Braketing TimeSamples: [ " + lower + ", " + upper + " ]");
}
else
{
EditorGUILayout.LabelField("Braketing TimeSamples: [ ]");
}
EditorGUILayout.LabelField("TimeSamples: ");
GUILayout.TextArea(string.Join(",",
selectedAttribute.GetTimeSamples().Select(p => p.ToString()).ToArray()));
// Spec are the low level API in Sdf, the enable one to read and write a layer without
// going through the composition graph. This is the fastest way to write USD data, but
// also the most complicated.
//
// A property stack is an ordered list of all opinions about what this value should be.
// The visualization below is a great debugging aid in production when something looks
// wrong, but you have no idea why your value (opinion) isn't winning. It lets the user
// understand how composition is working and shows them exactly what files are contributing
// the final result.
EditorGUILayout.LabelField("Authored Values: ");
var specs = selectedAttribute.GetPropertyStack();
if (specs.Count == 0)
{
EditorGUILayout.LabelField("[ Attribute has no authored opinions ]", EditorStyles.boldLabel);
}
foreach (var propSpec in specs)
{
EditorGUILayout.LabelField(propSpec.GetLayer().GetIdentifier());
}
// Separator.
EditorGUILayout.LabelField("", GUI.skin.horizontalSlider);
}
/// <summary>
/// Serializes the attribute value to USD-ASCII and writes it to Debug.Log.
/// </summary>
void DebugPrintAttr(Scene srcScene, UsdAttribute attr, UsdTimeCode time)
{
// Copy the desired attribute into a temp scene, with nothing other than this one attr.
var tmpScene = Scene.Create();
// Up-Axis is unrelated to the attribute, but it makes the generated USDA look more correct,
// since it will include an up-axis.
tmpScene.UpAxis = srcScene.UpAxis;
// Define the owning prim for the attribute.
var tmpPrim = tmpScene.Stage.DefinePrim(attr.GetPath().GetPrimPath(), attr.GetPrim().GetTypeName());
// Define the attribute itself.
var tmpAttr = tmpPrim.CreateAttribute(attr.GetName(), attr.GetTypeName());
// Gather the default value and the value at the current time.
var defaultVal = attr.Get(UsdTimeCode.Default());
var valAtTime = attr.Get(time);
// Copy them to the new attribute.
if (!defaultVal.IsEmpty())
{
tmpAttr.Set(defaultVal);
}
if (attr.ValueMightBeTimeVarying())
{
tmpAttr.Set(valAtTime, time);
}
// If this is an array, get the size.
var arraySize = -1;
if (valAtTime.IsArrayValued())
{
arraySize = (int)valAtTime.GetArraySize();
}
// Metadata cannot be time-varying.
UsdMetadataValueMap metaData = attr.GetAllMetadata();
foreach (var key in metaData.GetKeys())
{
tmpAttr.SetMetadata(key, metaData.GetValue(key));
}
// Export the single attribute to a string.
var stringified = "";
tmpScene.Stage.ExportToString(out stringified, addSourceFileComment: false);
// Dispose the tmp scene.
tmpScene.Close();
tmpScene = null;
// Print.
if (arraySize > -1)
{
stringified = "Array Size: " + arraySize + "\n" + stringified;
}
Debug.Log("Path: <" + attr.GetPath().ToString() + ">\n" + stringified);
}
