VIEWPORT (DXF)

The following group codes apply to viewport entities.

Viewport group codes
Group code	Description
100	Subclass marker (AcDbViewport)
10	Center point (in WCS) DXF: X value; APP: 3D point
20, 30	DXF: Y and Z values of center point (in WCS)
40	Width in paper space units
41	Height in paper space units
68	Viewport status field: -1 = On, but is fully off screen, or is one of the viewports that is not active because the $MAXACTVP count is currently being exceeded. 0 = Off <positive value > = On and active. The value indicates the order of stacking for the viewports, where 1 is the active viewport, 2 is the next, and so forth
69	Viewport ID
12	View center point (in DCS) DXF: X value; APP: 2D point
22	DXF: View center point Y value (in DCS)
13	Snap base point DXF: X value; APP: 2D point
23	DXF: Snap base point Y value
14	Snap spacing DXF: X value; APP: 2D point
24	DXF: Snap spacing Y value
15	Grid spacing DXF: X value; APP: 2D point
25	DXF: Grid spacing Y value
16	View direction vector (in WCS) DXF: X value; APP: 3D vector
26, 36	DXF: Y and Z values of view direction vector (in WCS)
17	View target point (in WCS) DXF: X value; APP: 3D vector
27, 37	DXF: Y and Z values of view target point (in WCS)
42	Perspective lens length
43	Front clip plane Z value
44	Back clip plane Z value
45	View height (in model space units)
50	Snap angle
51	View twist angle
72	Circle zoom percent
331	Frozen layer object ID/handle (multiple entries may exist) (optional)
90	Viewport status bit-coded flags: 1 (0x1) = Enables perspective mode 2 (0x2) = Enables front clipping 4 (0x4) = Enables back clipping 8 (0x8) = Enables UCS follow 16 (0x10) = Enables front clip not at eye 32 (0x20) = Enables UCS icon visibility 64 (0x40) = Enables UCS icon at origin 128 (0x80) = Enables fast zoom 256 (0x100) = Enables snap mode 512 (0x200) = Enables grid mode 1024 (0x400) = Enables isometric snap style 2048 (0x800) = Enables hide plot mode 4096 (0x1000) = kIsoPairTop. If set and kIsoPairRight is not set, then isopair top is enabled. If both kIsoPairTop and kIsoPairRight are set, then isopair left is enabled 8192 (0x2000) = kIsoPairRight. If set and kIsoPairTop is not set, then isopair right is enabled 16384 (0x4000) = Enables viewport zoom locking 32768 (0x8000) = Currently always enabled 65536 (0x10000) = Enables non-rectangular clipping 131072 (0x20000) = Turns the viewport off 262144 (0x40000) = Enables the display of the grid beyond the drawing limits 524288 (0x80000) = Enable adaptive grid display 1048576 (0x100000) = Enables subdivision of the grid below the set grid spacing when the grid display is adaptive 2097152 (0x200000) = Enables grid follows workplane switching
340	Hard-pointer ID/handle to entity that serves as the viewport's clipping boundary (only present if viewport is non-rectangular)
1	Plot style sheet name assigned to this viewport
281	Render mode: 0 = 2D Optimized (classic 2D) 1 = Wireframe 2 = Hidden line 3 = Flat shaded 4 = Gouraud shaded 5 = Flat shaded with wireframe 6 = Gouraud shaded with wireframe All rendering modes other than 2D Optimized engage the new 3D graphics pipeline. These values directly correspond to the SHADEMODE command and the AcDbAbstractViewTableRecord::RenderMode enum
71	UCS per viewport flag: 0 = The UCS will not change when this viewport becomes active. 1 = This viewport stores its own UCS which will become the current UCS whenever the viewport is activated
74	Display UCS icon at UCS origin flag: Controls whether UCS icon represents viewport UCS or current UCS (these will be different if UCSVP is 1 and viewport is not active). However, this field is currently being ignored and the icon always represents the viewport UCS
110	UCS origin DXF: X value; APP: 3D point
120, 130	DXF: Y and Z values of UCS origin
111	UCS X-axis DXF: X value; APP: 3D vector
121, 131	DXF: Y and Z values of UCS X-axis
112	UCS Y-axis DXF: X value; APP: 3D vector
122, 132	DXF: Y and Z values of UCS Y-axis
345	ID/handle of AcDbUCSTableRecord if UCS is a named UCS. If not present, then UCS is unnamed
346	ID/handle of AcDbUCSTableRecord of base UCS if UCS is orthographic (79 code is non-zero). If not present and 79 code is non-zero, then base UCS is taken to be WORLD
79	Orthographic type of UCS: 0 = UCS is not orthographic 1 = Top; 2 = Bottom 3 = Front; 4 = Back 5 = Left; 6 = Right
146	Elevation
170	ShadePlot mode: 0 = As Displayed 1 = Wireframe 2 = Hidden 3 = Rendered
61	Frequency of major grid lines compared to minor grid lines
332	Background ID/Handle (optional)
333	Shade plot ID/Handle (optional)
348	Visual style ID/Handle (optional)
292	Default lighting flag. On when no user lights are specified.
282	Default lighting type: 0 = One distant light 1 = Two distant lights
141	View brightness
142	View contrast
63,421,431	Ambient light color. Write only if not black color.
361	Sun ID/Handle (optional)
335	Soft pointer reference to viewport object (for layer VP property override)
343	Soft pointer reference to viewport object (for layer VP property override)
344	Soft pointer reference to viewport object (for layer VP property override)
91	Soft pointer reference to viewport object (for layer VP property override)

NOTE: The ZOOM XP factor is calculated with the following formula: group_41 / group_45 (or pspace_height / mspace_height).