private void AddCameraActor(
View3D InView3D,
CameraInfo InViewCamera
)
{
// Create a new Datasmith camera actor.
// Hash the Datasmith camera actor name to shorten it.
string HashedName = FDatasmithFacadeElement.GetStringHash(InView3D.UniqueId);
FDatasmithFacadeActorCamera CameraActor = new FDatasmithFacadeActorCamera(HashedName);
CameraActor.SetLabel(InView3D.Name);
if (InView3D.Category != null)
{
// Set the Datasmith camera actor layer to be the 3D view category name.
CameraActor.SetLayer(InView3D.Category.Name);
}
// Gets the current non-saved orientation of the 3D view.
ViewOrientation3D ViewOrientation = InView3D.GetOrientation();
// Set the world position (in right-handed Z-up coordinates) of the Datasmith camera actor.
XYZ CameraPosition = ViewOrientation.EyePosition;
CameraActor.SetCameraPosition((float)CameraPosition.X, (float)CameraPosition.Y, (float)CameraPosition.Z);
// Set the world rotation of the Datasmith camera actor with
// the camera world forward and up vectors (in right-handed Z-up coordinates).
XYZ CameraForward = ViewOrientation.ForwardDirection;
XYZ CameraUp = ViewOrientation.UpDirection;
CameraActor.SetCameraRotation((float)CameraForward.X, (float)CameraForward.Y, (float)CameraForward.Z, (float)CameraUp.X, (float)CameraUp.Y, (float)CameraUp.Z);
// When the 3D view camera is not available, an orthographic view should be assumed.
if (InViewCamera != null)
{
// Compute the aspect ratio (width/height) of the Revit 3D view camera, where
// HorizontalExtent is the distance between left and right planes on the target plane,
// VerticalExtent is the distance between top and bottom planes on the target plane.
float AspectRatio = (float)(InViewCamera.HorizontalExtent / InViewCamera.VerticalExtent);
// Set the aspect ratio of the Datasmith camera.
CameraActor.SetAspectRatio(AspectRatio);
if (InView3D.IsPerspective)
{
// Set the sensor width of the Datasmith camera.
CameraActor.SetSensorWidth((float)(InViewCamera.HorizontalExtent * /* millimeters per foot */ 304.8));
// Get the distance from eye point along view direction to target plane.
// This value is appropriate for perspective views only.
float TargetDistance = (float)InViewCamera.TargetDistance;
// Set the Datasmith camera focus distance.
CameraActor.SetFocusDistance(TargetDistance);
// Set the Datasmith camera focal length.
CameraActor.SetFocalLength(TargetDistance * /* millimeters per foot */ 304.8F);
}
}
// Add the camera actor to the Datasmith scene.
DatasmithScene.AddActor(CameraActor);
DirectLink?.MarkForExport(InView3D);
DirectLink?.CacheElement(RevitDocument, InView3D, new FDocumentData.FBaseElementData(CameraActor, null, DocumentDataStack.Peek()));
}
