public static void GetPreview(GH_Document definition, CompoundDrawable compoundDrawable,
Action <IGH_ActiveObject> onNotDrawble = null, Action <IGH_ActiveObject> onSuccessfulExtract = null)
{
var meshParameters = definition.PreviewCurrentMeshParameters() ?? Rhino.Geometry.MeshingParameters.Default;
var isRenderMode = definition.PreviewMode == GH_PreviewMode.Shaded;
foreach (var obj in definition.Objects.OfType <IGH_ActiveObject>())
{
if (obj.Locked)
{
continue;
}
bool isSelected = obj.Attributes.Selected;
if (definition.PreviewFilter == GH_PreviewFilter.Selected && !isSelected)
{
continue;
}
if (obj is IGH_PreviewObject previewObject)
{
if (previewObject.IsPreviewCapable && !previewObject.Hidden)
{
var geometries = new List <Rhino.Geometry.GeometryBase>();
if (obj is IGH_Component component)
{
foreach (var param in component.Params.Output)
{
ExtractGeometry(param.VolatileData, ref geometries, isRenderMode, meshParameters);
}
}
else if (obj is IGH_Param param)
{
ExtractGeometry(param.VolatileData, ref geometries, isRenderMode, meshParameters);
}
if (geometries.Count != 0)
{
geometries.ForEach(geom => compoundDrawable.AddDrawable(new PreviewDrawable(geom), isSelected));
onSuccessfulExtract?.Invoke(obj);
}
}
}
else
{
onNotDrawble?.Invoke(obj);
}
}
}
void DrawData(Grasshopper.Kernel.Data.IGH_Structure volatileData, IGH_DocumentObject docObject)
{
if (!volatileData.IsEmpty)
{
foreach (var value in volatileData.AllData(true))
{
// First check for IGH_PreviewData to discard no graphic elements like strings, doubles, vectors...
if (value is IGH_PreviewData)
{
switch (value.ScriptVariable())
{
case Rhino.Geometry.Point3d point: primitives.Add(new ParamPrimitive(docObject, new Rhino.Geometry.Point(point))); break;
case Rhino.Geometry.Line line: primitives.Add(new ParamPrimitive(docObject, new Rhino.Geometry.LineCurve(line))); break;
case Rhino.Geometry.Rectangle3d rect: primitives.Add(new ParamPrimitive(docObject, rect.ToNurbsCurve())); break;
case Rhino.Geometry.Arc arc: primitives.Add(new ParamPrimitive(docObject, new Rhino.Geometry.ArcCurve(arc))); break;
case Rhino.Geometry.Circle circle: primitives.Add(new ParamPrimitive(docObject, new Rhino.Geometry.ArcCurve(circle))); break;
case Rhino.Geometry.Ellipse ellipse: primitives.Add(new ParamPrimitive(docObject, ellipse.ToNurbsCurve())); break;
case Rhino.Geometry.Curve curve: primitives.Add(new ParamPrimitive(docObject, curve)); break;
case Rhino.Geometry.Mesh mesh: primitives.Add(new ParamPrimitive(docObject, mesh)); break;
case Rhino.Geometry.Box box: primitives.Add(new ParamPrimitive(docObject, Rhino.Geometry.Mesh.CreateFromBox(box, 1, 1, 1))); break;
case Rhino.Geometry.Brep brep:
{
var previewMesh = new Rhino.Geometry.Mesh();
previewMesh.Append(Rhino.Geometry.Mesh.CreateFromBrep(brep, activeDefinition.PreviewCurrentMeshParameters()));
//previewMesh.Weld(Rhino.RhinoMath.ToRadians(10.0));
primitives.Add(new ParamPrimitive(docObject, previewMesh));
}
break;
}
}
}
}
}