/// <summary>
/// Initialize a DirectShape element
/// </summary>
private void InitDirectShape(DesignScriptEntity shapeReference,
string shapeName,
Category category,
Material material)
{
//Phase 1 - Check to see if a DirectShape exists in trace and should be rebound
var oldShape =
ElementBinder.GetElementAndTraceData <Autodesk.Revit.DB.DirectShape, DirectShapeState>(Document);
//There was a oldDirectShape, rebind to that
if (oldShape != null)
{
//set the directshape element
this.InternalSetDirectShape(oldShape.Item1);
//if the cateogryID has changed, we cannot continue to rebind and instead
//will make a new directShape
if (category.Id == this.InternalElement.Category.Id.IntegerValue)
{
//set the shape geometry of the directshape, this method passes in the actual input geo
//and checks the directShapeState object at the elementId key in the input geo tags dictionary.
//this check is used to determine if the geometry should be updated, this is done by checking
//the sync guid in the DirectShapeState (a guid that is generated when geometry changes on
//the revit element.
//we also check the material, if it's different than the currently assigned material
//then we need to rebuild the geo so that a new material is applied
//
this.InternalSetShape(shapeReference, new ElementId(material.Id), oldShape.Item2.syncId);
this.InternalSetName(shapeReference, shapeName, material, category);
return;
}
}
//Phase 2- There was no existing shape, create one
TransactionManager.Instance.EnsureInTransaction(Document);
Autodesk.Revit.DB.DirectShape ds;
//generate the geometry correctly depending on the type of geo
var tessellatedShape = GenerateTessellatedGeo(shapeReference, new ElementId(material.Id));
//actually construct the directshape revit element
ds = NewDirectShape(tessellatedShape,
Document, new ElementId(category.Id),
DirectShape.DYNAMO_DIRECTSHAPE_APP_GUID.ToString(), shapeName);
InternalSetDirectShape(ds);
InternalSetName(shapeReference, shapeName, material, category);
//generate a new syncId for trace
var traceData = new DirectShapeState(this, Guid.NewGuid().ToString(), new ElementId(material.Id));
//add the elementID:tracedata to the tags dictionary on the real protogeometry input
shapeReference.Tags.AddTag(this.InternalElementId.ToString(), traceData);
TransactionManager.Instance.TransactionTaskDone();
ElementBinder.SetRawDataForTrace(traceData);
}
/// <summary>
/// Sets the internalDirectShape's shape to point to some geometry,
/// this method also generates tessellated geometry from the protogeometry object
/// and sets the material of the generated Revit faces
/// </summary>
private void InternalSetShape(DesignScriptEntity shapeReference, ElementId materialId, string currentSyncId)
{
//if the elementID for the current directShape revitElement exists on the input Geometry AND
//the value stored at that key is equal to the materialId we're trying to set AND
//the previousState's syncId (in the tags dictionary) equals the current syncId (from trace)
//then we do not need to regenerate
//first lookup the state on the input geometry
var previousState = shapeReference.Tags.LookupTag(this.InternalElementId.ToString()) as DirectShapeState;
//then compare values
if (previousState != null && previousState.materialId == materialId.IntegerValue && previousState.syncId == currentSyncId)
{
return;
}
TransactionManager.Instance.EnsureInTransaction(Document);
var tessellatedShape = GenerateTessellatedGeo(shapeReference, materialId);
this.InternalDirectShape.SetShape(tessellatedShape);
//update the value in trace, since we had to modify the geometry we need a new syncId
var updatedTraceData = new DirectShapeState(this, Guid.NewGuid().ToString(), materialId);
ElementBinder.SetRawDataForTrace(updatedTraceData);
//place new values in the tags dict
if (shapeReference.Tags.LookupTag(this.InternalElementId.ToString()) == null)
{
shapeReference.Tags.AddTag(this.InternalElementId.ToString(), updatedTraceData);
}
else
{
var storedState = shapeReference.Tags.LookupTag(this.InternalElementId.ToString()) as DirectShapeState;
storedState.syncId = updatedTraceData.syncId;
storedState.materialId = updatedTraceData.materialId;
storedState.IntID = updatedTraceData.IntID;
storedState.StringID = updatedTraceData.StringID;
}
TransactionManager.Instance.TransactionTaskDone();
}