Latest revision as of 15:36, 2 July 2011

FileFormat - TRN

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File Header

The general map parameters, as well as flora parameters are defined here

4A 3A 5C 73 77 67 5C 63 75 72 72 65 6E 74 5C 64 61 74 61 5C 	J..swg.current.data.
73 6B 75 2E 30 5C 73 79 73 2E 73 68 61 72 65 64 5C 62 75 69 	sku.0.sys.shared.bui
6C 74 5C 67 61 6D 65 5C 74 65 72 72 61 69 6E 5C 64 61 6E 74 	lt.game.terrain.dant
6F 6F 69 6E 65 2E 74 72 6E 00 00 00 80 46 00 00 00 41 02 00 	ooine.trn....F...A..
00 00 01 00 00 00 CD CC CC BD 00 00 00 40 77 74 65 72 5F 64 	..............wter.d
61 6E 74 5F 6C 61 6B 65 00 00 30 04 46 00 00 00 00 00 00 00 	ant.lake..0.F.......
43 00 00 00 41 00 00 00 40 00 00 00 00 00 00 00 00 00 00 80 	C...A...............
42 00 00 80 40 00 00 00 3F 00 00 00 00 00 00 00 00 00 00 F0 	B...................
41 00 00 80 3F 00 00 00 00 00 00 00 00 00 00 00 43 00 00 00 	A...............C...
44 00 00 00 42 00 00 00 41 00 00 00 00 	                        D...B...A....

TGEN - Terrain Generator

The rules in the terrain generation system are also referred to as affectors,and
are organized into layers. Boundaries refer to terrain designer- or artist-defined
regions of virtual terrain for which the desired rules have effect. Filters refer 
to conditions to be considered when applying affectors. Layers can be arranged 
in a hierarchy with a parent-child or tree-leaf relationship. Examples of boundaries 
include circles, rectangles, and polygons. Examples of filters include filtering 
by slope, height, shader, direction and fractal. Examples of affectors include 
those that affect height, color, shader, flora, and radial flora. Boundaries, filters 
and layers are described in greater detail below.

The terrain generation system also includes families, which refer to groups of 
assets such as textures, geometry or even algorithms. Families can include children 
with weights. This could involve choosing an asset by selecting a one weighted child. 
For example, this could allow the users to choose a "grass" family for a region, but 
when the terrain system generates the grass family, it can choose one of the children 
of the grass family, which results in the rendering of a single grass shader.

Examples of families include shader families, blend families, flora families, 
radial flora families, and fractal families. Shader families refer to grouping 
shaders for placing textures. Blend families refer to grouping shaders for selecting 
alpha blend masks. Flora families refer to grouping geometry for selecting flora. 
Radial flora families refer to grouping shaders for placing radial flora. 
Fractal families refer to grouping fractals for reuse within different rules.

Terrain generator (form name : TGEN) There are 6 different sections.

- The Shader family          (SGRP)
- The Flora family           (FRGP)
- The Radial Flora family    (RGRP)
- The Environment family     (EGRP)
- The Fractal family         (MGRP)
- The Layers family          (LYRS)

SGRP - Shader Family Group

Shader families refer to grouping shaders for placing textures

It's sub-divied into multiple surface families (SFAM).

Each one of them declare mutliple shaders using a surface file.

SGRP has x children (SFAM), SFAM has x children (Shaders)

Family break-down:

53 46 41 4D 00 00 00 55 22 00 00 00 73 6E 6F 77 5F 6D 74 6E 	SFAM...U....snow.mtn
73 70 65 61 6B 00 61 62 73 74 72 61 63 74 2F 74 65 72 72 61 	speak.abstract.terra
69 6E 5F 73 75 72 66 61 63 65 2F 73 6E 6F 77 2E 69 66 66 00 	in.surface.snow.iff.
FF FF 00 00 00 00 40 00 00 80 3F 01 00 00 00 	                ...............

(int)              Family ID   (This ID is user by the layers to select this family)
(String)           File Name
(byte)(byte)(byte) unk  ?Color?
(float)            unk
(float)            unk
(int)              Child Count

Child break-down:

73 6E 6F 77 5F 6D 74 6E 73 70 65 61 6B 00 00 00 80 3F 	       snow.mtnspeak.....

(string)           Shader Name
(float)            unk

FGRP - Flora Family Group

Flora families refer to grouping geometry -apt files- for selecting flora. (Select flora group properties, including flora family data)

Each one of them decalre one flora group using multiple appearance files.

FGRP has x children (FFAM), FFAM has x children (Appearance Files)

Family break-down:

46 46 41 4D 00 00 00 9D 01 00 00 00 66 65 72 6E 73 00 FF 80 	FFAM........ferns...
40 00 00 80 3F 00 00 00 00 02 00 00 00 	                        .............

(int)              Family ID   (This ID is user by the layers to select this family)
(String)           Family Name
(byte)(byte)(byte) ukn  ?Color?
(float)            ukn
(float)            ukn
(int)              Child Count

Child break-down:

70 74 63 68 5F 65 6E 64 72 5F 66 72 73 74 5F 63 6C 75 73 74 	ptch.endr.frst.clust
65 72 5F 61 31 2E 61 70 74 00 00 00 80 3F 00 00 00 00 0A D7 	er.a1.apt...........
23 3C CD CC CC 3D 01 00 00 00 01 00 00 00 00 00 40 3F 00 00 	....................
20 40 	                                                        ..

(String)           Appearance File Name 
(float)            ukn
(int)              ukn
(float)            ukn
(float)            ukn
(int)              ukn
(int)              ukn
(float)            ukn
(float)            ukn

RGRP - Radial Flora Family Group

Radial flora families refer to grouping shaders for placing radial flora.

Family break-down:

52 46 41 4D 00 00 01 06 01 00 00 00 67 72 61 73 73 79 20 70 	RFAM........grassy.p
6C 61 69 6E 73 00 FF FF 00 00 00 80 3F 04 00 00 00 	        lains............

(int)              Family ID   (This ID is user by the layers to select this family)
(String)           Family Name
(byte)(byte)(byte) ukn  ?Color?
(float)            ukn
(int)              Child Count

Child break-down:

(String)           Shader Name (dds file)
(float)            ukn
(float)            ukn
(float)            ukn
(float)            ukn
(int)              ukn
(float)            ukn
(float)            ukn
(int)              ukn
(?)                ukn
TODO..

EGRP - Environment Family Group

Declares the environement

EGRP has x children (EFAM)

Child break-down:

01 00 00 00 6D 61 69 6E 5F 62 61 73 65 00 FF FF 00 00 00 80 3F  	....main.base........
	
(int)                 Environment ID   (This ID is user by the layers to select this environment)
(String)              Environment Name                                                    
(byte)(byte)(byte)    ukn ?Color?
(float)               ukn

MGRP - Fractal Family Group

Fractal families refer to grouping fractals for reuse within different rules. It's sub-divied into multiple groups (MFAM). Each one of them declare a labelled fractal.

MGRP has x children (MFAM)

Child break-down:

4D 46 41 4D 44 41 54 41 00 00 00 1C 01 00 00 00 41 66 66 65 	MFAMDATA........Affe
63 74 6F 72 48 65 69 67 68 74 46 72 61 63 74 61 6C 5F 31 00 	ctorHeightFractal.1.
46 4F 52 4D 00 00 00 4C 4D 46 52 43 46 4F 52 4D 00 00 00 40 	FORM...LMFRCFORM....
30 30 30 31 44 41 54 41 00 00 00 34 00 00 00 00 00 00 00 00 	0001DATA...4........
00 00 00 3F 00 00 00 00 33 33 33 3F 02 00 00 00 00 00 80 40 	........333.........
00 00 00 3F 0A D7 23 3C 0A D7 23 3C 00 00 00 00 00 00 00 00 	....................
00 00 00 00 	

(int)          Fractal ID (This ID is user by the layers to select this family)
(String)       Fractal Label

MFRC FORM [...] DATA, byte count

(int)          seed
(int)          use_bias
(float)        bias
(int)          use_gain
(float)        gain
(int)          octaves
(float)        octaves_arg
(float)        amplitude
(float)        freq_x
(float)        freq_z
(float)        offset_x
(float)        offset_z
(int)          combination_type

LYRS - Layers

Layers & Affectors

Basically the role of layers is to affect the data contained in the different families. They can contain any number of other sub-layers. Their order is important.

A layer deals with the families trough Affectors. There are different types of them, each one has it's own role. Can have Affector for texturing, flora, areas...

Boundaries, filters, and affectors can be defined in layers and sublayers,
such that a single location in the terrain can have multiple terrain rules.
A layer without boundaries (or filters) is "unbounded," and can affect as much
as the entire landscape. A layer with a boundary allows the affectors in the
layer and sublayers to be applied to the region specified by the boundary.

Affectors

46 4F 52 4D 00 00 00 70 41 46 53 43 46 4F 52 4D 00 00 00 64 	FORM...pAFSCFORM...d
30 30 30 34 46 4F 52 4D 00 00 00 3C 49 48 44 52 46 4F 52 4D 	0004FORM....IHDRFORM
00 00 00 30 30 30 30 31 44 41 54 41 00 00 00 24 01 00 00 00 	...00001DATA........
41 66 66 65 63 74 6F 72 46 6C 6F 72 61 43 6F 6C 6C 69 64 61 	AffectorFloraCollida
62 6C 65 43 6F 6E 73 74 61 6E 74 00 44 41 54 41 00 00 00 14 	bleConstant.DATA....
05 00 00 00 01 00 00 00 00 00 00 00 01 00 00 00 00 00 80 3F 	....................

Note: Every Affector has an IHDR child wich is holding the user-custom name of the affector (here AffectorFloraCollidableConstant).

The 4 bytes Before the name is a Bool wich enable/disable the affector.

The affector-specific data is conatined After the IHDR in the last DATA form, it always starts with a byte counter.

**Boundaries**
BREC	Boundary Rectangle	Delimits a rectangle using 4 float: X1, Y1, X2, Y2 (Select rectangle boundary rule properties, including feathering distance, boundary left/right and near/far coords and local water table height, shader and sahder size.) 00 00 7A 44 00 00 7A 44 00 00 AF 44 00 00 AF 44 00 00 00 00 00 00 80 3F (float) X1 (float) Y1 (float) X2 (float) Y2 (int) Feathering Type (float) Feathering Amount
BCIR	Boundary Circle	Delimits a circle using 3 float: Xo, Yo, Radius (Select circle boundary rule properties, including feathering distance, boundary center coords, and boundary radius.) 00 00 48 43 00 00 48 43 00 00 48 43 01 00 00 00 CD CC CC 3D (float) X (float) Y (float) Radius (int) Feathering Type (float) Feathering Amount
BPOL	Boundary Polygon	Delimits a n-sided closed polygon area using 2 floats (Xo,Yo) for each point. (Select polygon boundary rule properties, includibng feathering distance and including local water table height, shader and shader size.) Water Area example 04 00 00 00 00 00 00 00 00 00 00 00 00 00 15 C3 00 00 00 00 .................... 00 00 15 C3 00 00 15 C3 00 00 00 00 00 00 15 C3 03 00 00 00 .................... 00 00 48 42 01 00 00 00 00 00 20 C1 00 00 00 40 77 74 65 72 ..HB............wter 5F 73 70 65 63 00 .spec. (int) Point Count - List ----------- (float) X (float) Y ------------------ (int) Fethering Type (float) Shore smoothness (0 is vertical, 50 looks normal. I don't know what scale mesurement is used) (int) Bool Water On/Off (float) Water Height (float) Water Shader Size (Common size = 2) (string) Water Shader (wter_spec = Look in the file header??)
BPLN	Boundary PolyLine	Delimits a n-sided line area using 2 floats (Xo,Yo) for each point and a float for the width. (Select polyline boundary rule properties, including feathering distance and width.) 08 00 00 00 00 00 80 3E 00 00 00 3F 00 00 00 00 00 00 74 41 00 00 0C C1 00 00 E8 41 00 00 0C C1 00 00 50 42 00 00 78 C1 00 80 85 42 00 00 D8 C1 00 80 91 42 00 00 12 C2 00 00 93 42 00 00 41 C2 00 00 94 42 01 00 00 00 00 00 80 3F 00 00 20 41 (int) Point Count - List ----------- (float) X (float) Y ------------------ (int) Feathering Type (float) Feathering Amount (float) Line Width

Note: Boundaries can have a special footer allowing them to behave as a water area.(TODO)

**Filters**
FDIR	Filter Direction	Select filter direction rule properties, including feathering distance, and min and max angle settings for filter setting to have effect.
FFRA	Filter Fractal	Delimits an area generated by a 2d fractal on the ground. (Select filter fractal rule properties incuding fractal family, low and high fractal settings and feathering distance.)
FHGT	Filter Height	Select filter height rule properties, including feathering, distance, filter low height, and filter high height.
FSLP	Filter Slope	Select filter slope rule properties, including feathering distance, filter min angle, and filter max angle. 00 00 00 00 00 00 C8 41 01 00 00 00 CD CC 8C (float) Minimum Angle (float) Maximum Angle (int) Type? (byte) ? (byte) ? (byte) ? Note the 3 last bytes may be a color.

**Texture / Shaders Affectors**
ASCN	Affector Shader Constant	Affect a shader using the family_id and the shader_id this family. (Select rule shader and family and feathering parameters.)
ASRP	Affector Shader Replace	Replace a shader with another shader (Select rule shader replace families, including source family (the family to be replaced), destination family (the family to replace with), and feathering parameters.)
ACCN	Affector Color Constant	Select color for rule.
FSHD	Filter Shader	Select filter shader rule properties, including shader family.

**Terrain Affectors**
AHCN	Affector Height Constant	Raises or lowers the ground using float for delta and float(scalar?) for slope-smooting. (Select terrain height value for rule.) 01 00 00 00 00 00 C8 C2 (int) ukn (float) Final Height
AHFR	Affector Height Fractal	Raises or lowers the ground irregulary using a fractal type from the Fractal Family. Float for delta and float(scalar?) (Select terrain height value for rule for fractal family.) 50 41 52 4D 00 00 00 0C 02 00 00 00 00 00 00 00 00 00 48 C2 (String) PARAM (int) Byte Count (int) Index of a Fractal Family in MGRP -non regular- (?) ukn (float) Height Delta, can be negative
AHTR	Affector Height Terrace	Select terrace height and flat ratio values for rule.

**Flora Affectors**
AFSC	Affector Flora Static Collidable	Sets the amount of collidable flora. (Select to add/remove flora, specify flora type and set flora density for static collidable flora.) 05 00 00 00 01 00 00 00 00 00 00 00 01 00 00 00 00 00 80 3F (int) Index of a family in FGRP -not regular- (int) ukn (?) ukn (int) ukn (float) Feathering
AFSN	Affector Flora Static Non-Collidable	Sets the amount of Non-collidable flora. (Select to add/remove flora, specify flora type and set flora density for static non-collidable flora.)
AFDN	Affector Flora Dynamic Near	I don't know much about those yet. Seems like they change the near/far radial displaying. They're often coupled to the flora affectors, for instance when cleaning an area for a city. (Select to add/remove flora, specify flora type and set flora destiny for dynamic near flora.)
AFDF	Affector Flora Dynamic Far	(Select to add/remove flora, specify flora type and set flora density for dynamic far flora.)

**Unknown**
AENV	Environment	Select enviroment group rule properties.
AEXC	Affector Exclude	This one shows up on the Patent App.
AROA	Affector Road	Select road rule properties, including width, shader, feathering height distance, and feathering shader distance.
ARIV	Affector River	Select river rule properties, including width, trench depth, flow velocity, bank and bottom shaders, water shader, water depth, water width, feathering distance.
ACRF	Affector Color Ramp Fractal	Select rule family and color ramp.
ACRH	Affector Color Ramp Height	Select rule color ramp and height low/high values.

Example


1. Layer

    a. AffectorHeightConstant, 10

    b. AffectorShaderConstant, Rock

2. Layer

    a. BoundaryCircle, x=500, y=500, r=500, feather=InOut

    b. AffectorHeightConstant, 0

    c. AffectorShaderConstant, Mud

    d. Layer

        i. FilterHeightmin=13,max=17

        ii. AffectorColorConstant, BLACK

3. Layer

    a. BoundaryRectangle, min=-500, -500, max=500, 500

    b. AffectorFloraStaticCollidableConstant, Conifer

    c. AffectorFloraDynamicNearConstant, Dead grass

Description

Using the example rules listed above, the corresponding rule 
description can perform the following:

1. Set the height of the terrain everywhere to 10 meters(1a) and assign the rock shader(1b). 

2. Then, in a 500 meter circle(2a) originating from coordinates (500, 500),
gradually decrease the height from 10 meters to 0 meters(2b), place the mud shader(2c),
and create a black band where the height of the terrain at a given sample point is between 13 and 17 meters.(2d, 2di, 2dii) 

3. Finally, in a rectangle(3a) from coordinates (-500, -500) to (500, 500), place 
conifer trees(3b) and dead grass(3c) within the rectangle.

Difference between revisions of "TRN (FileFormat)"

Latest revision as of 15:36, 2 July 2011

File Header

TGEN - Terrain Generator

SGRP - Shader Family Group

FGRP - Flora Family Group

RGRP - Radial Flora Family Group

EGRP - Environment Family Group

MGRP - Fractal Family Group

LYRS - Layers

Layers & Affectors

Affectors

Example

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