Entities

entities/underlay

#include "dxfio/entities/underlay.hpp"

In DxfIO::Entities

struct Bound

A vertex of an underlay's clipping boundary.

Field	Type	Meaning
`Position`	`Vector`	The vertex, in the entity's own coordinate system. Groups 11, 21.

The AcDbUnderlayReference subclass: where an underlay lies, how it is shown and how it is clipped.

Field	Type and default	Meaning
`Definition`	`Handle`	The definition object that names the file. Group 340.
`Position`	`Vector`	The insertion point, in world coordinates. Groups 10, 20, 30.
`Scale`	`Vector{.X = 1, .Y = 1, .Z = 1}`	The scale along each axis. Groups 41, 42, 43.
`Rotation`	`double`	The rotation, in degrees. Group 50.
`Extrusion`	`Vector{Up}`	The normal of the plane the entity is drawn in. Groups 210, 220, 230.
`Flags`	`int{Visible}`	1 clipped, 2 on, 4 monochrome, 8 adjusted for the background. Group 280.
`Contrast`	`int{Whole}`	The contrast, 20 to 100. Group 281.
`Fade`	`int`	The fade, 0 to 80. Group 282.
`Clip`	`std::vector<Bound>`	The vertices of the clipping boundary, two opposite corners for a rectangle.

template <Overlay KindV>

An underlay of the kind given: a PDF, DWF or DGN file shown under the drawing.

Field	Type	Meaning
`Record`	`Entities::Record`	The layer, linetype, color and the rest every entity carries.
`Picture`	`std::string`	The proxy graphics, for programs that cannot draw the entity. Group 92, or 160 from R2010, then 310.
`Overlaid`	`Boxed<Entities::Overlaid>`	Where the underlay lies and how it is shown, from the AcDbUnderlayReference subclass.

A PDFUNDERLAY: a page of a PDF file shown under the drawing.

using PdfUnderlay = UnderlayOf<Overlay::Pdf>;

A DWFUNDERLAY: a sheet of a DWF file shown under the drawing.

using DwfUnderlay = UnderlayOf<Overlay::Dwf>;

A DGNUNDERLAY: a model of a MicroStation DGN file shown under the drawing.

using DgnUnderlay = UnderlayOf<Overlay::Dgn>;

`Visible`	`int = 2`	The display flags of a new underlay: on, unclipped, in color.
`Whole`	`int = 100`	The full contrast a new underlay takes.