Entities

entities/viewport

#include "dxfio/entities/viewport.hpp"

In DxfIO::Entities

struct Port

The AcDbViewport subclass of a VIEWPORT: the window on the paper and the view of model space it shows.

Field	Type and default	Meaning
`Center`	`Vector`	The center of the window, in paper space coordinates. Groups 10, 20, 30.
`Width`	`double`	The width of the window, in paper space units. Group 40.
`Height`	`double`	The height of the window, in paper space units. Group 41.
`Status`	`int`	0 off, -1 on but not shown, or the viewport's place among those shown, 1 the active one. Group 68.
`Id`	`int`	The viewport's identifier, 1 for the one that shows the paper itself. Group 69.
`View`	`Vector`	The center of the view, in display coordinates. Groups 12, 22, from R2000.
`Base`	`Vector`	The base point of the snap. Groups 13, 23, from R2000.
`Snap`	`Vector`	The spacing of the snap. Groups 14, 24, from R2000.
`Grid`	`Vector`	The spacing of the grid. Groups 15, 25, from R2000.
`Direction`	`Vector{Up}`	The direction the view looks from, toward its target, in world coordinates. Groups 16, 26, 36, from R2000.
`Target`	`Vector`	The point the view looks at, in world coordinates. Groups 17, 27, 37, from R2000.
`Lens`	`double`	The lens length of a perspective view. Group 42, from R2000.
`Front`	`double`	The offset of the front clipping plane from the target. Group 43, from R2000.
`Back`	`double`	The offset of the back clipping plane from the target. Group 44, from R2000.
`Extent`	`double{-1}`	The height of the view, in model space units. Group 45, from R2000.
`Angle`	`double`	The snap angle. Group 50, from R2000.
`Twist`	`double`	The twist of the view. Group 51, from R2000.
`Zoom`	`int{Roundness}`	The circle zoom percent. Group 72, from R2000.
`Frozen`	`std::vector<Handle>`	The layers frozen in this viewport alone. Group 341 before R2004, 331 from it.
`Flags`	`int{Unflagged}`	1 perspective, 2 front clip, 4 back clip, 8 UCS follows, 256 snap, 512 grid, 16384 scale locked, 65536 clipped by an entity, 131072 off, among others; 32768 always set. Group 90, from R2000.
`Clip`	`Handle`	The entity that clips the viewport when it is not rectangular. Group 340, from R2000.
`Sheet`	`std::string`	The name of the plot style sheet. Group 1, from R2000.
`Render`	`int`	The render mode: 0 2D wireframe, 1 3D wireframe, 2 hidden line, 3 flat shaded, 4 Gouraud shaded, 5 and 6 the same with wireframe. Group 281, from R2000.
`Follows`	`int{1}`	1 when the viewport keeps its own UCS, made current when it is active. Group 71, from R2000.
`Icon`	`int`	1 when the UCS icon is drawn at the UCS origin. Group 74, from R2000.
`Axes`	`Tables::Axes`	The viewport's own UCS. Groups 110, 111, 112, 345, 346, 79 and 146, from R2000.
`Shade`	`int`	How the viewport is plotted: 0 as displayed, 1 wireframe, 2 hidden, 3 rendered. Group 170, from R2004.
`Major`	`int{Gridmajor}`	How often a major grid line is drawn, in grid lines. Group 61, from R2007.
`Background`	`Handle`	The background drawn behind the view. Group 332, from R2007.
`Plot`	`Handle`	The visual style or render preset the viewport is shade plotted with. Group 333, from R2007.
`Style`	`Handle`	The visual style the view is drawn in. Group 348, from R2007.
`Lit`	`bool{true}`	Whether the default lighting is on. Group 292, from R2007.
`Lighting`	`int{1}`	The default lighting: 1 one distant light, 2 two distant lights. Group 282, from R2007.
`Brightness`	`double`	The brightness of the view. Group 141, from R2007.
`Contrast`	`double`	The contrast of the view. Group 142, from R2007.
`Ambient`	`int{Ambience}`	The ambient light color, as an AutoCAD Color Index. Group 63, from R2007.
`Rgb`	`std::optional<int>`	The ambient light's true color, as 0xRRGGBB. Group 421, from R2007.
`Book`	`std::string`	The color book of the ambient light, joined to the color's name by a $. Group 431, from R2007.
`Sun`	`Handle`	The SUN that lights the viewport. Group 361, from R2007.

struct ViewportVIEWPORT

A VIEWPORT: a window on a layout's paper that shows a view of model space.

Field	Type	Meaning
`Record`	`Entities::Record`	The layer, linetype, color and the rest every entity carries.
`Port`	`Boxed<Entities::Port>`	The window and the view, from the AcDbViewport subclass.

Constants

`Roundness`	`int = 100`	The circle zoom percent a new viewport takes, which sets how smoothly it draws circles and arcs.
`Unflagged`	`int = 32768`	The status bits of a new viewport: only 32768, which AutoCAD always sets.
`Gridmajor`	`int = 5`	How often a new viewport draws a major grid line, as $GRIDMAJOR and a VPORT's Tables::Gridmajor: every fifth line.
`Ambience`	`int = 250`	The ambient light color of a new viewport, as an AutoCAD Color Index: a dark gray.