/// <summary>
/// This function builds a scene of all IfcProducts in the model, excluding the geometry of Openings
/// It will create a scene database, overwriting any of the same name
/// </summary>
/// <param name="model">Model containing the model entities</param>
/// <param name="sceneDbName">Name of scene DB file</param>
/// <param name="Logger">Logging engine for detailed feedback</param>
public void BuildGlobalScene(XbimModel model, string sceneDbName, Common.Logging.ILogger Logger = null)
{
if (File.Exists(sceneDbName))
File.Delete(sceneDbName);
//get a connection
using (var db = new XbimSqliteDB(sceneDbName))
{
try
{
short spaceId = IfcMetaData.IfcTypeId(typeof(IfcSpace));
XbimGeometryHandleCollection handles = new XbimGeometryHandleCollection(model.GetGeometryHandles()
.Exclude(IfcEntityNameEnum.IFCFEATUREELEMENT));
XbimRect3D modelBounds = XbimRect3D.Empty;
XbimColourMap cmap = new XbimColourMap();
int layerid = 1;
IfcProject project = model.IfcProject;
int projectId = 0;
if (project != null) projectId = Math.Abs(project.EntityLabel);
float mScalingReference = (float)model.ModelFactors.OneMetre;
if (Logger != null)
Logger.DebugFormat("XbimScene: Scaling reference {0}\r\n", mScalingReference);
XbimMatrix3D translate = XbimMatrix3D.Identity;
XbimMatrix3D scale = XbimMatrix3D.CreateScale(1 / mScalingReference);
XbimMatrix3D composed = translate * scale;
XbimGeometryData regionData = model.GetGeometryData(projectId, XbimGeometryType.Region).FirstOrDefault(); //get the region data should only be one
if (regionData != null)
{
// this results in centering the most populated area of the model
//
XbimRegionCollection regions = XbimRegionCollection.FromArray(regionData.ShapeData);
XbimRegion largest = regions.MostPopulated();
if (largest != null)
{
translate = XbimMatrix3D.CreateTranslation(
-largest.Centre.X,
-largest.Centre.Y,
-largest.Centre.Z
);
}
composed = translate * scale;
// store region information in Scene
if ((Options & GenerateSceneOption.IncludeRegions) == GenerateSceneOption.IncludeRegions)
{
if (Logger != null)
Logger.DebugFormat("XbimScene: Exporting regions.\r\n", mScalingReference);
foreach (var item in regions)
{
// the bounding box needs to be moved/scaled by the transform.
//
XbimRect3D transformed = item.ToXbimRect3D().Transform(composed);
db.AddMetaData(
"Region",
-1,
string.Format("Name:{0};Box:{1};", item.Name, transformed.ToString()), // verbose, but only a few items are expected in the model
item.Name
);
}
}
}
if ((Options & GenerateSceneOption.IncludeTransform) == GenerateSceneOption.IncludeTransform)
{
if (Logger != null)
Logger.DebugFormat("XbimScene: Exporting transform.\r\n", mScalingReference);
db.AddMetaData(
"Transform",
-1,
composed.ToArray(false),
"World"
);
db.Flush();
}
if (Logger != null)
Logger.DebugFormat("XbimScene: Exporting layers.\r\n", mScalingReference);
foreach (var layerContent in handles.GroupByBuildingElementTypes())
{
string elementTypeName = layerContent.Key;
XbimGeometryHandleCollection layerHandles = layerContent.Value;
IEnumerable<XbimGeometryData> geomColl = model.GetGeometryData(layerHandles);
XbimColour colour = cmap[elementTypeName];
XbimMeshLayer<XbimMeshGeometry3D, XbimRenderMaterial> layer = new XbimMeshLayer<XbimMeshGeometry3D, XbimRenderMaterial>(model, colour) { Name = elementTypeName };
//add all content initially into the hidden field
foreach (var geomData in geomColl)
{
geomData.TransformBy(composed);
if (geomData.IfcTypeId == spaceId)
layer.AddToHidden(geomData);
else
layer.AddToHidden(geomData, model);
}
if (modelBounds.IsEmpty)
modelBounds = layer.BoundingBoxHidden();
else
modelBounds.Union(layer.BoundingBoxHidden());
// add top level layers
layerid = RecursivelyPersistLayer(db, layer, layerid, -1);
layerid++;
}
// create scene row in Scenes tables
//
if (Logger != null)
Logger.DebugFormat("XbimScene: Exporting scene.\r\n", mScalingReference);
byte[] boundingBoxFull = modelBounds.ToFloatArray();
db.AddScene(1, "MainScene", boundingBoxFull);
//now add some meta data about spaces
if (
(Options & GenerateSceneOption.IncludeSpaces) == GenerateSceneOption.IncludeSpaces
||
(Options & GenerateSceneOption.IncludeSpacesBBox) == GenerateSceneOption.IncludeSpacesBBox
||
(Options & GenerateSceneOption.IncludeSpacesStoreyId) == GenerateSceneOption.IncludeSpacesStoreyId
)
{
if (Logger != null)
Logger.DebugFormat("XbimScene: Exporting spaces.\r\n", mScalingReference);
// string data loop
foreach (var space in model.Instances.OfType<IfcSpace>())
{
int iEntLabel = Math.Abs(space.EntityLabel);
if ((Options & GenerateSceneOption.IncludeSpaces) == GenerateSceneOption.IncludeSpaces)
{
db.AddMetaData(
space.GetType().Name,
iEntLabel,
space.Name ?? "Unnamed Space",
iEntLabel.ToString()
);
}
if ((Options & GenerateSceneOption.IncludeSpacesStoreyId) == GenerateSceneOption.IncludeSpacesStoreyId)
{
var parent = space.GetContainingStructuralElement();
if (parent == null)
{
// try with different application behaviours
foreach (var item in space.Decomposes)
{
parent = item.RelatingObject as IfcSpatialStructureElement;
if (parent != null)
{
break;
}
}
// parent = space.Decomposes.FirstOrDefault().RelatingObject;
// Decomposes RelatingObject
}
if (parent != null)
{
db.AddMetaData(
"SpaceToStorey",
iEntLabel,
string.Format("StoreyName={0};StoreyLabel={1};", parent.Name, parent.EntityLabel),
iEntLabel.ToString());
}
}
}
// binary data loop
foreach (var space in model.Instances.OfType<IfcSpace>())
{
int iEntLabel = Math.Abs(space.EntityLabel);
if ((Options & GenerateSceneOption.IncludeSpacesBBox) == GenerateSceneOption.IncludeSpacesBBox)
{
XbimGeometryData geomdata = model.GetGeometryData(iEntLabel, XbimGeometryType.BoundingBox).FirstOrDefault();
if (geomdata != null)
{
XbimRect3D r3d = XbimRect3D.FromArray(geomdata.ShapeData);
XbimRect3D transformed = r3d.Transform(composed);
db.AddMetaData(
"SpaceBBox",
iEntLabel,
// string.Format("Box:{1};", transformed.ToString()), // verbose, but only a few items are expected in the model
transformed.ToFloatArray(),
iEntLabel.ToString()
);
}
// db.AddMetaData(space.GetType().Name, space.Name ?? "Undefined Space", space.EntityLabel.ToString());
}
}
}
// Add storey information with elevation.
//
IfcBuilding bld = model.IfcProject.GetBuildings().FirstOrDefault();
if (bld != null && (Options & GenerateSceneOption.IncludeStoreys) == GenerateSceneOption.IncludeStoreys)
{
if (Logger != null)
Logger.DebugFormat("XbimScene: Exporting storeys.\r\n", mScalingReference);
double storeyHeight = 0;//all scenes are in metres
int defaultStoreyName = 0;
foreach (var storey in bld.GetBuildingStoreys(true))
{
string cleanName;
if(storey.Name.HasValue)
cleanName = storey.Name.Value.ToString().Replace(';', ' ');
else
cleanName = "Floor " + defaultStoreyName++;
var spacesCount = storey.SpatialStructuralElementChildren.OfType<IfcSpatialStructureElement>().ToList().Count(); // add for checking spaces
// Storey Elevation is optional (and has been found unreliable), therefore
// Storey elevation values (in building reference system) are taken from the
// objectplacement through the XbimGeometryType.TransformOnly geometry type
//
XbimGeometryData geomdata = model.GetGeometryData(storey.EntityLabel, XbimGeometryType.TransformOnly).FirstOrDefault();
if (geomdata != null)
{
storeyHeight = geomdata.Transform.OffsetZ;
// apply the transformation previously applied to the building
XbimPoint3D InTranslatedReference = composed.Transform(
new XbimPoint3D(0, 0, storeyHeight)
);
double InTranslatedReferenceZ = InTranslatedReference.Z; // then express it in meters.
// Logger.DebugFormat("StoreyName: {0}; Model Elevation: {1}; Scene Elevation: {2}", cleanName, storeyHeight, InTranslatedReferenceZ);
db.AddMetaData(
"Storey",
Math.Abs(storey.EntityLabel),
string.Format("Name:{0};Elevation:{1};SpaceCount:{2};", cleanName, InTranslatedReferenceZ, spacesCount), // storeyHeight),
cleanName);
}
}
}
}
finally
{
db.Flush();
GC.Collect();
}
}
}
private int RecursivelyPersistLayer(XbimSqliteDB db, XbimMeshLayer<XbimMeshGeometry3D, XbimRenderMaterial> layer, int layerid, int parentLayerId)
{
try
{
// bytes contain 6 floats and 1 int
// pointX, pointY, pointZ, normalX, normalY, normalZ, entityLabel
// this is the vbo.
XbimTexture texture = layer.Style;
XbimColour c = layer.Style.ColourMap[0]; //take the first one, not perhaps correct or best practice
byte[] colour = new byte[4 * sizeof(float)];
MemoryStream ms = new MemoryStream(colour);
BinaryWriter bw = new BinaryWriter(ms);
bw.Write(c.Red);
bw.Write(c.Green);
bw.Write(c.Blue);
bw.Write(c.Alpha);
byte[] vbo = ((XbimMeshGeometry3D)layer.Hidden).ToByteArray();
MemoryStream memoryStream = new MemoryStream();
using (ICSharpCode.SharpZipLib.GZip.GZipOutputStream zis = new ICSharpCode.SharpZipLib.GZip.GZipOutputStream(memoryStream))
{
zis.Write(vbo, 0, vbo.Length);
memoryStream.Flush();
}
vbo = memoryStream.ToArray();
// bounding box
XbimRect3D bb = layer.BoundingBoxHidden();
byte[] bbArray = bb.ToFloatArray();
db.AddLayer(layer.Name, layerid, parentLayerId, colour, vbo, bbArray);
int myParent = layerid;
foreach (var subLayer in layer.SubLayers)
{
layerid++;
layerid = RecursivelyPersistLayer(db, subLayer, layerid, myParent);
}
return layerid;
}
catch (Exception ex)
{
throw new XbimException("Error building scene layer", ex);
}
}