AGN (FSX)

2015-05-24T08:24:54Z

Golf-HotelDelta: /* A2GE */

{{Infobox-Applicable-FSVersion
| FSXI = false
| FSXA = true
| FSX = true
| FS2004 = false
| FS2002 = false
| FS2000 = unknown
| FS98 = unknown
}}

This document describes the FSX format for autogen (AGN) files.

== Sections ==

The AGN file uses the RIFF format (like MDL files), this means that the file consists of different sections. Each section starts with a four character label, followed by the length of the section in bytes (this length without the header itself).

The main RIFF section itself has one additional parameter, this is a four character string that indicates the type of RIFF AGN file. For an FSX AGN file the value should always be AGNX.

The following subsection show more details about the content of these different sections.

=== VERS ===

Contains versions information about the AGN file.

int32 version (normally 1091777331)

=== GBDD ===

Contains information about autogen generic buildings

int32 percentage of 1 and 2 floor buildings (normally 10)
int32 percentage of 3 to 5 floor buildings (normally 10)
int32 percentage of 6 to 8 floor buildings (normally 10)
int32 percentage of 9 to 12 floor buildings (normally 10)

Valid values for percentage are from 0x00 (0%) to 0x14 (100%).

=== GBTE ===

This section contains the name of the texture to use for the generic buidlings. The texture name is stored without extension and the length seems to be a multiple of 4.

=== RHTE ===

This section contains the name of the texture to use for the row houses. The texture name is stored without extension and the length seems to be a multiple of 4.

=== GBLD ===

Contains building information. This section contains one or more [[#GBLR|GBLR]] sections.

==== GBLR ====

Contains information about Generic Buildings.

GUID roof type (will use default roofs, if 0)

For each Generic Building:

float X position of first point
float Y position of first point
float X direction to the second point
float Y direction to the second point
float X offset of third point
float Y offset of third point

The x and y coordinates are given as offset from the middle of the LOD13 square (range -0.5 till 0.5).

=== PREG ===

Contains vegatation information. This section contains one or more [[#PRDE|PRDE]] sections.

==== PRDE ====

For vegatation polygon. Contains:

GUID vegatation type

For each polygon:

int number of vertices

For each vertex:

single x
single y

The x and y coordinates are given as offset from the top left of the LOD13 square (range 0 till 1). The first and last vertex of the polygon have to be the same (so the polygon has to be closed).

=== VGRG ===

Contains information about FSX style rectangular vegetation regions. This section contains one or more [[#VGRE|VGRE]] sections. The type of vegetation is defined by a GUID.

==== VGRE ====

GUID vegetation type

For each rectangle:

float X position of first point
float Y position of first point
float X offset to second point
float Y offset to second point

The x and y coordinates are given as offset from the middle of the LOD13 square (range -0.5 till 0.5).

=== VGRD ===

Contains information about the FS2004 vegetation definition.

int vegetation class 1
int vegetation class 2
int percentage vegetation class 1 (0-100)
int maximum density
float minimum height class 1
float maximum height class 1
float minimum height class 2
float maximum height class 2

=== VGRO ===

Contains information about FS2004 style rectangular vegetation regions. The type of vegetation is defined in the [[#VGRD|VGRD]] section.

For each rectangle:

float X position of first point
float Y position of first point
float X offset to second point
float Y offset to second point

The x and y coordinates are given as offset from the middle of the LOD13 square (range -0.5 till 0.5).

=== ROWH ===

Contains information about row houses. The amount of houses is the length of the section divided by 24.

For each row house:

float X position of first point
float Y position of first point
float X direction to second point
float Y direction to second point
float X offset to third point
float Y offset to third point

The x and y coordinates are given as offset from the middle of the LOD13 square (range -0.5 till 0.5).

=== AGN2 ===

Contains information about library objects. Contains one or more [[#A2GE|A2GE]] sections.

==== A2GE ====

Contains information about library objects.

GUID library object guid

For each library object:

float X position of first point
float Y position of first point
float X direction to second point
float Y direction to second point

Optional:

float X offset to third point
float Y offset to third point

The x and y coordinates are given as offset from the middle of the LOD13 square (range -0.5 till 0.5). The coordinates describe the bounding box, the actual library object is placed in the center of it.

=== PBLD===

Contains information about polygon buildings. Contains one or more [[#PBDE|PBDE]] sections.

==== PBDE====

GUID building type

For each building:

int32 1 (seems always to be 1)
float extrusion width
int32 number of footprint vertices

For each vertex:

single x
single y

The x and y coordinates are given as offset from the top left of the LOD13 square (range 0 till 1).

[[Category:Terrain Design]]
[[Category:File_Formats]]
[[Category:Autogen]]

FSDeveloper Wiki - User contributions [en-gb]

AGN (FSX)