/// <summary>
/// Determine appropriate field points and values to display
/// the given greyscale bitmap image data on the given face.
/// </summary>
static void GetFieldPointsAndValues(
ref IList <UV> pts,
ref IList <ValueAtPoint> valuesAtPoints,
ref GreyscaleBitmapData data,
Face face)
{
BoundingBoxUV bb = face.GetBoundingBox();
double umin = bb.Min.U;
double umax = bb.Max.U;
double ustep = (umax - umin) / data.Width;
double u = umin;
double v = bb.Min.V;
double vmax = bb.Max.V;
double vstep = (vmax - v) / data.Height;
List <double> values = new List <double>(1);
for (int y = 0; y < data.Height; ++y, v += vstep)
{
Debug.Assert(v < vmax,
"expected v to remain within bounds");
u = umin;
for (int x = 0; x < data.Width; ++x, u += ustep)
{
Debug.Assert(u < umax,
"expected u to remain within bounds");
double brightness = data.GetBrightnessAt(
x, y);
UV uv = new UV(u, v);
pts.Add(uv);
values.Clear();
values.Add(brightness);
valuesAtPoints.Add(new ValueAtPoint(
values));
}
}
}
/// <summary>
/// External webcam event driver.
/// Check regularly whether the webcam image has
/// been updated. If so, update the spatial field
/// primitive with the new image data.
/// Currently, we only display a grey scale image.
/// Colour images could be handled as well by
/// defining a custom colour palette.
/// </summary>
static void Run()
{
_running = true;
while (_running)
{
_data = new GreyscaleBitmapData(
_width, _height, _url);
byte[] hash = _data.HashValue;
if (null == _lastHash ||
0 != CompareBytes(hash, _lastHash))
{
_lastHash = hash;
_event.Raise();
}
Thread.Sleep(_intervalMs);
}
}
/// <summary>
/// Handle Revit Idling event.
/// If less time elapsed than the specified interval, return immediately.
/// Otherwise, download the current image frile from the specified URL.
/// If it has not changed since the last update, return immediately.
/// Otherwise, update the spatial field primitive with the new image data.
/// Currently, we only display a grey scale image.
/// Colour images could be handled as well by defining a custom colour palette.
/// </summary>
static void OnIdling(
object sender,
IdlingEventArgs e)
{
if (DateTime.Now.Subtract(_lastUpdate)
> _interval)
{
Log("OnIdling");
GreyscaleBitmapData data
= new GreyscaleBitmapData(
_width, _height, _url);
byte[] hash = data.HashValue;
if (null == _lastHash ||
0 != CompareBytes(hash, _lastHash))
{
_lastHash = hash;
// access active document from sender:
Application app = sender as Application;
Debug.Assert(null != app,
"expected a valid Revit application instance");
UIApplication uiapp = new UIApplication(app);
UIDocument uidoc = uiapp.ActiveUIDocument;
Document doc = uidoc.Document;
Log("OnIdling image changed, active document "
+ doc.Title);
Transaction transaction
= new Transaction(doc, "Revit Webcam Update");
transaction.Start();
View view = doc.ActiveView; // maybe has to be 3D
SpatialFieldManager sfm
= SpatialFieldManager.GetSpatialFieldManager(
view);
if (null == sfm)
{
sfm = SpatialFieldManager
.CreateSpatialFieldManager(view, 1);
}
if (0 > _sfp_index)
{
_sfp_index = sfm.AddSpatialFieldPrimitive(
_faceReference);
}
int nPoints = data.Width * data.Height;
IList <UV> pts = new List <UV>(nPoints);
IList <ValueAtPoint> valuesAtPoints
= new List <ValueAtPoint>(nPoints);
// warning CS0618:
// GeometryObject is obsolete: Property will be removed.
// Use Element.GetGeometryObjectFromReference(Reference) instead
//Face face = _faceReference.GeometryObject as Face; // 2011
Face face = doc.get_Element(_elementId)
.GetGeometryObjectFromReference(
_faceReference) as Face; // 2012
GetFieldPointsAndValues(ref pts,
ref valuesAtPoints, ref data, face);
FieldDomainPointsByUV fieldPoints
= new FieldDomainPointsByUV(pts);
FieldValues fieldValues
= new FieldValues(valuesAtPoints);
// warning CS0618:
// UpdateSpatialFieldPrimitive(int, FieldDomainPoints, FieldValues) is obsolete:
// This method is obsolete in Revit 2012; use the overload accepting the result index instead.
//sfm.UpdateSpatialFieldPrimitive(
// _sfp_index, fieldPoints, fieldValues ); // 2011
sfm.UpdateSpatialFieldPrimitive(
_sfp_index, fieldPoints, fieldValues, _sfp_index); // 2012
doc.Regenerate();
transaction.Commit();
_lastUpdate = DateTime.Now;
}
}
}
/// <summary>
/// Handle Revit Idling event.
/// If less time elapsed than the specified interval, return immediately.
/// Otherwise, download the current image frile from the specified URL.
/// If it has not changed since the last update, return immediately.
/// Otherwise, update the spatial field primitive with the new image data.
/// Currently, we only display a grey scale image.
/// Colour images could be handled as well by defining a custom colour palette.
/// </summary>
static void OnIdling(
object sender,
IdlingEventArgs e)
{
if (DateTime.Now.Subtract(_lastUpdate)
> _interval)
{
Log("OnIdling");
GreyscaleBitmapData data
= new GreyscaleBitmapData(
_width, _height, _url);
byte[] hash = data.HashValue;
if (null == _lastHash ||
0 != CompareBytes(hash, _lastHash))
{
_lastHash = hash;
// access active document from sender:
Application app = sender as Application;
Debug.Assert(null != app,
"expected a valid Revit application instance");
UIApplication uiapp = new UIApplication(app);
UIDocument uidoc = uiapp.ActiveUIDocument;
Document doc = uidoc.Document;
Log("OnIdling image changed, active document "
+ doc.Title);
Transaction transaction
= new Transaction(doc, "Revit Webcam Update");
transaction.Start();
View view = doc.ActiveView; // maybe has to be 3D
SpatialFieldManager sfm
= SpatialFieldManager.GetSpatialFieldManager(
view);
if (null == sfm)
{
sfm = SpatialFieldManager
.CreateSpatialFieldManager(view, 1);
}
if (0 > _sfp_index)
{
_sfp_index = sfm.AddSpatialFieldPrimitive(
_faceReference);
}
int nPoints = data.Width * data.Height;
IList <UV> pts = new List <UV>(nPoints);
IList <ValueAtPoint> valuesAtPoints
= new List <ValueAtPoint>(nPoints);
Face face = _faceReference.GeometryObject
as Face;
GetFieldPointsAndValues(ref pts,
ref valuesAtPoints, ref data, face);
FieldDomainPointsByUV fieldPoints
= new FieldDomainPointsByUV(pts);
FieldValues fieldValues
= new FieldValues(valuesAtPoints);
sfm.UpdateSpatialFieldPrimitive(
_sfp_index, fieldPoints, fieldValues);
doc.Regenerate();
transaction.Commit();
_lastUpdate = DateTime.Now;
}
}
}
/// <summary>
/// Handle Revit Idling event.
/// Return immediately if less time elapsed than
/// specified interval.
/// Otherwise, download the current image file
/// from the specified URL.
/// If it has not changed since the last update,
/// return immediately.
/// Otherwise, update the spatial field primitive
/// with the new image data.
/// Currently, we only display a grey scale image.
/// Colour images could be handled as well by
/// defining a custom colour palette.
/// </summary>
static void OnIdling(
object sender,
IdlingEventArgs e)
{
if (DateTime.Now.Subtract(_lastUpdate)
> _interval)
{
Log("OnIdling");
GreyscaleBitmapData data
= new GreyscaleBitmapData(
_width, _height, _url);
byte[] hash = data.HashValue;
if (null == _lastHash ||
0 != CompareBytes(hash, _lastHash))
{
_lastHash = hash;
// access active document from sender:
// Support both 2011, where sender is an
// Application instance, and 2012, where
// it is a UIApplication instance:
UIApplication uiapp
= sender is UIApplication
? sender as UIApplication // 2012
: new UIApplication(
sender as Application); // 2011
Debug.Assert(null != uiapp,
"expected a valid Revit UIApplication instance");
UIDocument uidoc = uiapp.ActiveUIDocument;
Document doc = uidoc.Document;
Log("OnIdling image changed, active document "
+ doc.Title);
Transaction transaction
= new Transaction(doc, "Revit Webcam Update");
transaction.Start();
View view = doc.ActiveView; // maybe has to be 3D
SpatialFieldManager sfm
= SpatialFieldManager.GetSpatialFieldManager(
view);
if (null == sfm)
{
sfm = SpatialFieldManager
.CreateSpatialFieldManager(view, 1);
}
if (0 > _sfp_index)
{
_sfp_index = sfm.AddSpatialFieldPrimitive(
_faceReference);
}
int nPoints = data.Width * data.Height;
IList <UV> pts = new List <UV>(nPoints);
IList <ValueAtPoint> valuesAtPoints
= new List <ValueAtPoint>(nPoints);
// warning CS0618:
// GeometryObject is obsolete: Property will be removed.
// Use Element.GetGeometryObjectFromReference(Reference) instead
//Face face = _faceReference.GeometryObject as Face; // 2011
//Face face = doc.get_Element( _elementId )
// .GetGeometryObjectFromReference(
// _faceReference ) as Face; // 2012
// warning CS0618:
// Autodesk.Revit.DB.Document.get_Element(Autodesk.Revit.DB.ElementId) is obsolete:
// This method has been obsoleted. Use GetElement() instead.
//Element eFace = doc.get_Element( _elementId ); // 2012
Element eFace = doc.GetElement(_elementId); // 2013
Face face = eFace.GetGeometryObjectFromReference(
_faceReference) as Face; // 2012
GetFieldPointsAndValues(ref pts,
ref valuesAtPoints, ref data, face);
FieldDomainPointsByUV fieldPoints
= new FieldDomainPointsByUV(pts);
FieldValues fieldValues
= new FieldValues(valuesAtPoints);
int result_index;
IList <int> registeredResults = sfm.GetRegisteredResults();
if (0 == registeredResults.Count)
{
AnalysisResultSchema resultSchema
= new AnalysisResultSchema(
"Schema 1", "Schema 1 Description");
result_index = sfm.RegisterResult(
resultSchema);
}
else
{
result_index = registeredResults.First();
}
// warning CS0618:
// UpdateSpatialFieldPrimitive(int, FieldDomainPoints, FieldValues) is obsolete:
// This method is obsolete in Revit 2012; use the overload accepting the result index instead.
//sfm.UpdateSpatialFieldPrimitive(
// _sfp_index, fieldPoints, fieldValues ); // 2011
sfm.UpdateSpatialFieldPrimitive(
_sfp_index, fieldPoints, fieldValues,
result_index); // 2012
doc.Regenerate();
transaction.Commit();
_lastUpdate = DateTime.Now;
}
}
}
