protected void UnpackEntities(SU.EntitiesRef entitiesRef)
{
// Get the faces.
long count;
SU.EntitiesGetNumFaces(entitiesRef, out count);
SU.FaceRef[] faceRefs = new SU.FaceRef[count];
long len = count;
SU.EntitiesGetFaces(entitiesRef, len, faceRefs, out count);
foreach (SU.FaceRef faceRef in faceRefs)
{
Faces.Add(new Face(faceRef));
}
// Get the groups.
SU.EntitiesGetNumGroups(entitiesRef, out count);
SU.GroupRef[] groupRefs = new SU.GroupRef[count];
len = count;
SU.EntitiesGetGroups(entitiesRef, len, groupRefs, out count);
foreach (SU.GroupRef groupRef in groupRefs)
{
Groups.Add(new Group(groupRef));
}
// Get the instances.
SU.EntitiesGetNumInstances(entitiesRef, out count);
SU.ComponentInstanceRef[] instanceRefs = new SU.ComponentInstanceRef[count];
len = count;
SU.EntitiesGetInstances(entitiesRef, len, instanceRefs, out count);
foreach (SU.ComponentInstanceRef instanceRef in instanceRefs)
{
Instances.Add(new CompInst(instanceRef));
}
}
internal new void Pack(Model model, SU.EntitiesRef entitiesRef)
{
// The SketchUp API appears to add a "persistent ID" to vertices,
// edges, and faces, as they are added to definitions and groups.
// But it also appears not to do this unless the definition or
// group reference has already been added to the model. If you
// add those references to the model after creating their contents,
// SketchUp will detect the missing IDs on load and "fix" them,
// causing SketchUp to ask if you want to save the changes when
// you close (even though you won't think you've made any).
//
// You can see this in the "Edit / Undo Check Validity" menu item
// when it happens. Undo it, and then use the "Window / Model info"
// dialog, under "Statistics" by pressing the "Fix Problems"
// button. You'll get a report on the missing persistent IDs.
//
// To prevent all this from happening, we add the reference first.
SU.GroupRef groupRef = new SU.GroupRef();
SU.GroupCreate(groupRef);
SU.EntitiesAddGroup(entitiesRef, groupRef);
SU.EntitiesRef myEntitiesRef = new SU.EntitiesRef();
SU.GroupGetEntities(groupRef, myEntitiesRef);
//entities.Pack(model, myEntitiesRef);
base.Pack(model, myEntitiesRef);
// Set the group's name and transformation..
SU.GroupSetName(
groupRef,
Name);
SU.GroupSetTransform(
groupRef,
Transform.SUTransformation);
}
internal Group(
SU.GroupRef groupRef)
{
// Get the transform.
SU.Transformation transformation = new SU.Transformation();
SU.GroupGetTransform(groupRef, out transformation);
Transform = new Transform(transformation);
// Get the name.
SU.StringRef stringRef = new SU.StringRef();
SU.StringCreate(stringRef);
SU.GroupGetName(groupRef, stringRef);
Name = Convert.ToStringAndRelease(stringRef);
// Note that a Group can upcast into a DrawingElement.
// As such, it can have an instance-wide Material set for it that
// SketchUp will use on any Faces that use the defalt Material.
// But you cannot set the Group's material; you must
// upcast first.
// Upcast to a DrawingElement and get the material name.
SU.DrawingElementRef drawingElementRef =
SU.GroupToDrawingElement(groupRef);
SU.MaterialRef materialRef = new SU.MaterialRef();
try
{
SU.DrawingElementGetMaterial(drawingElementRef, materialRef);
stringRef = new SU.StringRef();
SU.StringCreate(stringRef);
SU.MaterialGetNameLegacyBehavior(materialRef, stringRef);
MaterialName = Convert.ToStringAndRelease(stringRef);
}
catch (SketchUpException e)
{
if (e.ErrorCode == SU.ErrorNoData)
{
// Not an error. It just has no material.
}
else
{
throw;
}
}
// Get the entities.
SU.EntitiesRef entitiesRef = new SU.EntitiesRef();
SU.GroupGetEntities(groupRef, entitiesRef);
UnpackEntities(entitiesRef);
}
