/// <summary>
/// Generate Viewpoint
/// </summary>
private VisualizationInfo generateViewpoint()
{
try
{
// save selected elements to BCF compoments first
List <Component> bcfComponents = new List <Component>();
var selectedElements = MSApp.ActiveModelReference.GetSelectedElements().BuildArrayFromContents();
if (selectedElements.Length > 0)
{
string originatingSystem = getBentleyProductName();
bcfComponents = new List <Component>();
foreach (Element e in selectedElements)
{
string ifcGuid = string.Empty;
PropertyHandler handler = MSApp.CreatePropertyHandler(e);
if (handler.SelectByAccessString("GUID"))
{
Guid guid = parseGuid(handler.GetDisplayString());
ifcGuid = IfcGuid.ToIfcGuid(guid).ToString();
}
bcfComponents.Add(new Component(originatingSystem, e.ID.ToString(), ifcGuid));
}
}
// get current view
int activeViewNum = getActiveViewNumber();
View currentView = MSApp.ActiveDesignFile.Views[activeViewNum];
double unitFactor = 1 / GetGunits();
// enable perspective camera back and forth to get correct view attributes, see the post below
// https://communities.bentley.com/products/programming/microstation_programming/f/343173/t/80064
MSApp.CadInputQueue.SendKeyin("MDL KEYIN BENTLEY.VIEWATTRIBUTESDIALOG,VAD VIEWATTRIBUTESDIALOG SETATTRIBUTE 0 Camera True");
MSApp.CadInputQueue.SendKeyin("MDL KEYIN BENTLEY.VIEWATTRIBUTESDIALOG,VAD VIEWATTRIBUTESDIALOG SETATTRIBUTE 0 Camera False");
// camera direction
Point3d direction = MSApp.Point3dNormalize(MSApp.Point3dSubtract(currentView.get_CameraTarget(), currentView.get_CameraPosition()));
// force view center to be identical as camera target if camera direction is not along Z axis (i.e., not top view or bottom view)
if (direction.X > distancePrecision || direction.Y > distancePrecision) // arbitrary precision
{
Point3d center = new Point3d();
center = currentView.get_Center();
Point3d extents = new Point3d();
extents = currentView.get_Extents();
Point3d translation = new Point3d();
translation = MSApp.Point3dSubtract(center, currentView.get_CameraTarget());
ViewCameraParameters vcp = new ViewCameraParametersClass();
vcp.set_CameraPosition(MSApp.Point3dAdd(currentView.get_CameraPosition(), translation));
vcp.set_CameraTarget(MSApp.Point3dAdd(currentView.get_CameraTarget(), translation));
currentView.SetCameraProperties(vcp);
currentView.set_Extents(extents);
currentView.set_Center(center);
currentView.Redraw();
}
// camera scale
double h = currentView.get_Extents().Y *unitFactor;
double w = currentView.get_Extents().X *unitFactor;
double fov = 180 * currentView.CameraAngle / Math.PI;
// camera location
Point3d cameraLocation = MSApp.Point3dScale(currentView.get_CameraPosition(), unitFactor);
// grab current view center point and force to top view if camera direction is along Z axis (i.e., top view or bottom view)
if (direction.X < distancePrecision && direction.Y < distancePrecision) // arbitrary precision
{
cameraLocation = MSApp.Point3dScale(currentView.get_Center(), unitFactor);
direction.Z = -1.0;
}
// camera up vector
Point3d upVector = currentView.get_CameraUpVector();
// set up BCF viewpoint
VisualizationInfo v = new VisualizationInfo();
v.Components = bcfComponents;
// FIXME: ignore perspective view for now
/*if (currentView.isPerspective)
* {
* v.PerspectiveCamera = new PerspectiveCamera();
* v.PerspectiveCamera.CameraViewPoint.X = cameraLocation.X;
* v.PerspectiveCamera.CameraViewPoint.Y = cameraLocation.Y;
* v.PerspectiveCamera.CameraViewPoint.Z = cameraLocation.Z;
* v.PerspectiveCamera.CameraUpVector.X = upVector.X;
* v.PerspectiveCamera.CameraUpVector.Y = upVector.Y;
* v.PerspectiveCamera.CameraUpVector.Z = upVector.Z;
* v.PerspectiveCamera.CameraDirection.X = direction.X;
* v.PerspectiveCamera.CameraDirection.Y = direction.Y;
* v.PerspectiveCamera.CameraDirection.Z = direction.Z;
* v.PerspectiveCamera.FieldOfView = fov;
* }
* else
* {*/
v.OrthogonalCamera = new OrthogonalCamera();
v.OrthogonalCamera.CameraViewPoint.X = cameraLocation.X;
v.OrthogonalCamera.CameraViewPoint.Y = cameraLocation.Y;
v.OrthogonalCamera.CameraViewPoint.Z = cameraLocation.Z;
v.OrthogonalCamera.CameraUpVector.X = upVector.X;
v.OrthogonalCamera.CameraUpVector.Y = upVector.Y;
v.OrthogonalCamera.CameraUpVector.Z = upVector.Z;
v.OrthogonalCamera.CameraDirection.X = direction.X;
v.OrthogonalCamera.CameraDirection.Y = direction.Y;
v.OrthogonalCamera.CameraDirection.Z = direction.Z;
v.OrthogonalCamera.ViewToWorldScale = h;
//}
// get current clip volume and compute clipping planes
ulong previousClipVolumeId = 0;
try
{
int status = mdlView_getClipBoundaryElement(ref previousClipVolumeId, activeViewNum - 1).ToInt32();
if (status == 0)
{
Element previousClipVolume = MSApp.ActiveModelReference.GetElementByID((long)previousClipVolumeId);
var smartSolids = MSApp.SmartSolid.ConvertToSmartSolidElement(previousClipVolume).BuildArrayFromContents();
if (smartSolids.Length > 0)
{
// just consider one solid for now
SmartSolidElement clipVolumeSolid = smartSolids[0].AsSmartSolidElement;
var surfaces = clipVolumeSolid.ExtractAllSurfaceFromSolid().BuildArrayFromContents();
List <ClippingPlane> clippingPlanes = new List <ClippingPlane>();
foreach (Element surface in surfaces)
{
ComplexShapeElement surfaceShape = surface.AsComplexShapeElement();
var vertices = surfaceShape.ConstructVertexList(0.1); // arbitrary tolerance for now
if (vertices.Length > 0)
{
// produce BCF clipping planes
Point3d location = MSApp.Point3dScale(MSApp.Point3dAdd(clipVolumeSolid.Origin, vertices[0]), unitFactor);
ClippingPlane clippingPlane = new ClippingPlane()
{
Direction = new Direction()
{
X = surfaceShape.Normal.X, Y = surfaceShape.Normal.Y, Z = surfaceShape.Normal.Z
},
Location = new Classes.BCF2.Point()
{
X = location.X, Y = location.Y, Z = location.Z
}
};
clippingPlanes.Add(clippingPlane);
}
}
// add to BCF clipping planes
v.ClippingPlanes = clippingPlanes.ToArray();
}
}
}
catch (Exception ex)
{
// do nothing just for catching the exception when clip volume not found, element not found, or not being converted to smart solid
}
return(v);
}
catch (System.Exception ex1)
{
MessageBox.Show("exception: " + ex1, "Error!");
}
return(null);
}