public static void GetAttributeStringDataHelper(HEU_SessionBase session, HAPI_NodeId geoID, HAPI_PartId partID, string name, ref HAPI_AttributeInfo info, ref HAPI_StringHandle[] data)
{
int originalTupleSize = info.tupleSize;
bool bResult = false;
for (HAPI_AttributeOwner type = 0; type < HAPI_AttributeOwner.HAPI_ATTROWNER_MAX; ++type)
{
bResult = session.GetAttributeInfo(geoID, partID, name, type, ref info);
if (bResult && info.exists)
{
break;
}
}
if (!bResult || !info.exists)
{
return;
}
if (originalTupleSize > 0)
{
info.tupleSize = originalTupleSize;
}
data = new HAPI_StringHandle[info.count * info.tupleSize];
bResult = session.GetAttributeStringData(geoID, partID, name, ref info, data, 0, info.count);
if(!bResult)
{
Debug.LogErrorFormat("Failed to get string IDs for attribute {0}", name);
}
}
/// <summary>
/// Generates object instances.
/// Skips parts that already have their instances generated.
/// </summary>
/// <param name="session">Active session to use</param>
public void GenerateObjectInstances(HEU_SessionBase session)
{
if (!IsInstancer())
{
Debug.LogErrorFormat("Generate object instances called on a non-instancer object {0} for asset {1}!", ObjectName, ParentAsset.AssetName);
return;
}
//Debug.LogFormat("Generate Object Instances:: id={5}, name={0}, isInstancer={1}, isInstanced={2}, instancePath={3}, instanceId={4}", HEU_SessionManager.GetString(_objectInfo.nameSH, session),
// _objectInfo.isInstancer, _objectInfo.isInstanced, HEU_SessionManager.GetString(_objectInfo.objectInstancePathSH, session), _objectInfo.objectToInstanceId, _objectInfo.nodeId);
// Is this a Houdini attribute instancer?
string instanceAttrName = HEU_PluginSettings.InstanceAttr;
string unityInstanceAttrName = HEU_PluginSettings.UnityInstanceAttr;
string instancePrefixAttrName = HEU_Defines.DEFAULT_INSTANCE_PREFIX_ATTR;
HAPI_AttributeInfo instanceAttrInfo = new HAPI_AttributeInfo();
HAPI_AttributeInfo unityInstanceAttrInfo = new HAPI_AttributeInfo();
HAPI_AttributeInfo instancePrefixAttrInfo = new HAPI_AttributeInfo();
int numGeos = _geoNodes.Count;
for(int i = 0; i < numGeos; ++i)
{
if(_geoNodes[i].Displayable)
{
List<HEU_PartData> parts = _geoNodes[i].GetParts();
int numParts = parts.Count;
for(int j = 0; j < numParts; ++j)
{
if(parts[j].ObjectInstancesBeenGenerated)
{
// This prevents instances being created unnecessarily (e.g. part hasn't changed since last cook)
continue;
}
HEU_GeneralUtility.GetAttributeInfo(session, _geoNodes[i].GeoID, parts[j].PartID, instanceAttrName, ref instanceAttrInfo);
HEU_GeneralUtility.GetAttributeInfo(session, _geoNodes[i].GeoID, parts[j].PartID, unityInstanceAttrName, ref unityInstanceAttrInfo);
string[] instancePrefixes = null;
HEU_GeneralUtility.GetAttributeInfo(session, _geoNodes[i].GeoID, parts[j].PartID, instancePrefixAttrName, ref instancePrefixAttrInfo);
if(instancePrefixAttrInfo.exists)
{
instancePrefixes = HEU_GeneralUtility.GetAttributeStringData(session, _geoNodes[i].GeoID, parts[j].PartID, instancePrefixAttrName, ref instancePrefixAttrInfo);
}
// Must clear out instances, as otherwise we get duplicates
parts[j].ClearInstances();
// Clear out invalid object instance infos that no longer have any valid parts
parts[j].ClearInvalidObjectInstanceInfos();
if (instanceAttrInfo.exists)
{
// Object instancing via Houdini instance attribute
parts[j].GenerateInstancesFromObjectIds(session, instancePrefixes);
}
else if (unityInstanceAttrInfo.exists)
{
// Object instancing via existing Unity object (path from point attribute)
// Attribute owner type determines whether to use single instanced object (detail) or multiple (point)
if (unityInstanceAttrInfo.owner == HAPI_AttributeOwner.HAPI_ATTROWNER_POINT)
{
parts[j].GenerateInstancesFromUnityAssetPathAttribute(session, unityInstanceAttrName);
}
else if(unityInstanceAttrInfo.owner == HAPI_AttributeOwner.HAPI_ATTROWNER_DETAIL)
{
bool bInstanced = false;
int[] scriptAttr = new int[unityInstanceAttrInfo.count];
if(session.GetAttributeStringData(_geoNodes[i].GeoID, parts[j].PartID, unityInstanceAttrName, ref unityInstanceAttrInfo, scriptAttr, 0, unityInstanceAttrInfo.count))
{
string assetPath = HEU_SessionManager.GetString(scriptAttr[0]);
if (!string.IsNullOrEmpty(assetPath))
{
parts[j].GenerateInstancesFromUnityAssetPath(session, assetPath, instancePrefixes);
bInstanced = true;
}
}
if (!bInstanced)
{
Debug.LogWarningFormat("Unable to get instanced object path from detail instance attribute!");
}
}
else
{
// Other attribute owned types are unsupported
Debug.LogWarningFormat("Unsupported attribute owner {0} for attribute {1}", unityInstanceAttrInfo.owner, unityInstanceAttrName);
}
}
else
{
// Standard object instancing via single Houdini object
if (_objectInfo.objectToInstanceId == HEU_Defines.HEU_INVALID_NODE_ID)
{
Debug.LogAssertionFormat("Invalid object ID {0} used for object instancing. "
+ "Make sure to turn on Full point instancing and set the correct Instance Object.", _objectInfo.objectToInstanceId);
continue;
}
parts[j].GenerateInstancesFromObjectID(session, _objectInfo.objectToInstanceId, instancePrefixes);
}
}
}
}
}