Formato de archivo TSCN

El formato de archivo TSCN (escena de texto) representa un árbol de escena único dentro de Godot. Los archivos TSCN tienen la ventaja de ser generalmente legibles por los humanos y fáciles de manejar por los sistemas de control de versiones. Durante la importación, los archivos TSCN se compilan en archivos binarios .scn almacenados dentro de la carpeta .import. Esto reduce el tamaño de los datos y acelera la carga.

El formato de archivo ESCN (escena exportada) es idéntico al formato de archivo TSCN, pero se utiliza para indicar a Godot que el archivo ha sido exportado desde otro programa y no debe ser editado por el usuario desde dentro de Godot.

Para los que buscan una descripción completa, el análisis sintáctico se maneja en el archivo resource_format_text.cpp en la clase ResourceFormatLoaderText.

Estructura de los archivos

Hay cinco secciones principales dentro de los archivos TSCN:

  1. Descriptor de Archivos
  2. Recursos externos
  3. Recursos internos
  4. Nodos
  5. Conexiones

El descriptor de archivos se parece a [gd_scene load_steps=1 format=2] y debería ser la primera entrada del archivo. El parámetro load_steps debería ser (en teoría) el número de recursos dentro del archivo. Sin embargo, en la práctica, su valor parece no importar.

Estas secciones deben aparecer en orden, pero puede ser difícil distinguirlas. La única diferencia entre ellas es el primer elemento en el encabezado de todos los elementos de la sección. Por ejemplo, el encabezado de todos los recursos externos debe comenzar con [ext_resource .....].

Los archivos TSCN pueden contener comentarios de una sola línea que empiezan con un punto y coma (;). Sin embargo, los comentarios serán descartados cuando se guarde el archivo usando el editor de Godot.

Entradas dentro de los archivos

Un encabezado se parece a [<resource_type> key=value key=value key=value ...] donde resource_type es uno de:

  • ext_resource
  • sub_resource
  • node
  • connection

Debajo de cada encabezado viene cero o más pares de clave = valor. Los valores pueden ser tipos de datos complejos como Arrays, Transforms, Colors, etc. Por ejemplo, un nodo spatial se ve como:

[node name="Cube" type="Spatial" parent="."]
transform=Transform( 1.0, 0.0, 0.0 ,0.0, 1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0 )

El árbol de escenas

The scene tree is made up of… nodes! The heading of each node consists of its name, parent and (most of the time) a type. For example [node type="Camera" name="PlayerCamera" parent="Player/Head"]

Other valid keywords include:

  • instance
  • instance_placeholder
  • owner
  • index (if two nodes have the same name)
  • groups

The first node in the file, which is also the scene root, must not have a parent=Path/To/Node entry in its heading. All scene files should have exactly one scene root. If it doesn't, Godot will fail to import the file. The parent path of other nodes should be absolute, but shouldn't contain the scene root's name. If the node is a direct child of the scene root, the path should be ".". Here is an example scene tree (but without any node content):

[node name="Player" type="Spatial"]             ; The scene root
[node name="Arm" parent="." type="Spatial"]     ; Parented to the scene root
[node name="Hand" parent="Arm" type="Spatial"]
[node name="Finger" parent="Arm/Hand" type="Spatial"]

Similar to the internal resource, the document for each node is currently incomplete. Fortunately, it is easy to find out because you can simply save a file with that node in it. Some example nodes are:

[node type="CollisionShape" name="SphereCollision" parent="SpherePhysics"]

shape = SubResource(8)
transform = Transform( 1.0 , 0.0 , -0.0 , 0.0 , -4.371138828673793e-08 , 1.0 , -0.0 , -1.0 , -4.371138828673793e-08 ,0.0 ,0.0 ,-0.0  )


[node type="MeshInstance" name="Sphere" parent="SpherePhysics"]

mesh = SubResource(9)
transform = Transform( 1.0 , 0.0 , -0.0 , 0.0 , 1.0 , -0.0 , -0.0 , -0.0 , 1.0 ,0.0 ,0.0 ,-0.0  )


[node type="OmniLight" name="Lamp" parent="."]

light_energy = 1.0
light_specular = 1.0
transform = Transform( -0.29086464643478394 , -0.7711008191108704 , 0.5663931369781494 , -0.05518905818462372 , 0.6045246720314026 , 0.7946722507476807 , -0.9551711678504944 , 0.199883371591568 , -0.21839118003845215 ,4.076245307922363 ,7.3235554695129395 ,-1.0054539442062378  )
omni_range = 30
shadow_enabled = true
light_negative = false
light_color = Color( 1.0, 1.0, 1.0, 1.0 )


[node type="Camera" name="Camera" parent="."]

projection = 0
near = 0.10000000149011612
fov = 50
transform = Transform( 0.6859206557273865 , -0.32401350140571594 , 0.6515582203865051 , 0.0 , 0.8953956365585327 , 0.44527143239974976 , -0.7276763319969177 , -0.3054208755493164 , 0.6141703724861145 ,14.430776596069336 ,10.093015670776367 ,13.058500289916992  )
far = 100.0

NodePath

A tree structure is not enough to represent the whole scene. Godot uses a NodePath(Path/To/Node) structure to refer to another node or attribute of the node anywhere in the scene tree. For instance, MeshInstance uses NodePath() to point to its skeleton. Likewise, Animation tracks use NodePath() to point to node properties to animate.

[node name="mesh" type="MeshInstance" parent="Armature001"]

mesh = SubResource(1)
skeleton = NodePath("..:")
[sub_resource id=3 type="Animation"]

...
tracks/0/type = "transform
tracks/0/path = NodePath("Cube:")
...

Esqueleto

The Skeleton node inherits the Spatial node, but also may have a list of bones described in key-value pairs in the format bones/Id/Attribute=Value. The bone attributes consist of:

  • name
  • parent
  • rest
  • pose
  • enabled
  • bound_children
  1. name must be the first attribute of each bone.
  2. parent is the index of parent bone in the bone list, with parent index, the bone list is built to a bone tree.
  3. rest is the transform matrix of bone in its "resting" position.
  4. pose is the pose matrix; use rest as the basis.
  5. bound_children is a list of NodePath() which point to BoneAttachments belonging to this bone.

Aquí hay un ejemplo de un nodo esqueleto con dos huesos:

[node name="Skeleton" type="Skeleton" parent="Armature001" index="0"]

bones/0/name = "Bone.001"
bones/0/parent = -1
bones/0/rest = Transform( 1, 0, 0, 0, 0, -1, 0, 1, 0, 0.038694, 0.252999, 0.0877164 )
bones/0/pose = Transform( 1.0, 0.0, -0.0, 0.0, 1.0, -0.0, -0.0, -0.0, 1.0, 0.0, 0.0, -0.0 )
bones/0/enabled = true
bones/0/bound_children = [  ]
bones/1/name = "Bone.002"
bones/1/parent = 0
bones/1/rest = Transform( 0.0349042, 0.99939, 0.000512929, -0.721447, 0.0248417, 0.692024, 0.691589, -0.0245245, 0.721874, 0, 5.96046e-08, -1.22688 )
bones/1/pose = Transform( 1.0, 0.0, -0.0, 0.0, 1.0, -0.0, -0.0, -0.0, 1.0, 0.0, 0.0, -0.0 )
bones/1/enabled = true
bones/1/bound_children = [  ]

BoneAttachment

BoneAttachment node is an intermediate node to describe some node being parented to a single bone in a Skeleton node. The BoneAttachment has a bone_name=NameOfBone attribute, and the corresponding bone being the parent has the BoneAttachment node in its bound_children list.

An example of one MeshInstance parented to a bone in Skeleton:

[node name="Armature" type="Skeleton" parent="."]

transform = Transform(1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0, -0.0219986, 0.0125825, 0.0343127)
bones/0/name = "Bone"
bones/0/parent = -1
bones/0/rest = Transform(1.0, 0.0, 0.0, 0.0, 0.0, -1.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0)
bones/0/pose = Transform(1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0)
bones/0/enabled = true
bones/0/bound_children = [NodePath("BoneAttachment:")]

[node name="BoneAttachment" type="BoneAttachment" parent="Armature"]

bone_name = "Bone"

[node name="Cylinder" type="MeshInstance" parent="Armature/BoneAttachment"]

mesh = SubResource(1)
transform = Transform(1.0, 0.0, 0.0, 0.0, 1.86265e-09, 1.0, 0.0, -1.0, 0.0, 0.0219986, -0.0343127, 2.25595)

AnimationPlayer

AnimationPlayer works as an animation library. It stores animations listed in the format anim/Name=SubResource(ResourceId); each line refers to an Animation resource. All the animation resources use the root node of AnimationPlayer. The root node is stored as root_node=NodePath(Path/To/Node).

[node name="AnimationPlayer" type="AnimationPlayer" parent="." index="1"]

root_node = NodePath("..")
autoplay = ""
playback_process_mode = 1
playback_default_blend_time = 0.0
playback_speed = 1.0
anims/default = SubResource( 2 )
blend_times = [  ]

Recursos

Resources are components that make up the nodes. For example, a MeshInstance node will have an accompanying ArrayMesh resource. The ArrayMesh resource may be either internal or external to the TSCN file.

References to the resources are handled by id numbers in the resource's heading. External resources and internal resources are referred to with ExtResource(id) and SubResource(id), respectively. Because there have different methods to refer to internal and external resources, you can have the same ID for both an internal and external resource.

For example, to refer to the resource [ext_resource id=3 type="PackedScene" path=....], you would use ExtResource(3).

Recursos externos

External resources are links to resources not contained within the TSCN file itself. An external resource consists of a path, a type and an ID.

Godot always generates absolute paths relative to the resource directory and thus prefixed with res://, but paths relative to the TSCN file's location are also valid.

Some example external resources are:

[ext_resource path="res://characters/player.dae" type="PackedScene" id=1]
[ext_resource path="metal.tres" type="Material" id=2]

Like TSCN files, a TRES file may contain single-line comments starting with a semicolon (;). However, comments will be discarded when saving the resource using the Godot editor.

Recursos internos

A TSCN file can contain meshes, materials and other data. These are contained in the internal resources section of the file. The heading for an internal resource looks similar to those of external resources, except that it doesn't have a path. Internal resources also have key=value pairs under each heading. For example, a capsule collision shape looks like:

[sub_resource  type="CapsuleShape" id=2]

radius = 0.5
height = 3.0

Some internal resources contain links to other internal resources (such as a mesh having a material). In this case, the referring resource must appear before the reference to it. This means that order matters in the file's internal resources section.

Unfortunately, documentation on the formats for these subresources isn't complete. Some examples can be found by inspecting saved resource files, but others can only be found by looking through Godot's source.

ArrayMesh

ArrayMesh consists of several surfaces, each in the format surface\Index={}. Each surface is a set of vertices and a material.

TSCN files support two surface formats:

  1. For the old format, each surface has three essential keys:
  • primitive

  • arrays

  • morph_arrays

    1. primitive is an enumerate variable, primitive=4 which is PRIMITIVE_TRIANGLES is frequently used.
    2. arrays is a two-dimensional array, it contains:
      1. Array de posiciones de vértices
      2. Array de tangentes
      3. Array de colores de vértices
      4. UV array 1
      5. UV array 2
      6. Array de índices de huesos
      7. Array de peso de los huesos
      8. Array de índices de vértices
    3. morph_arrays is an array of morphs. Each morph is exactly an arrays without the vertex indexes array.

Un ejemplo de ArrayMesh:

[sub_resource id=1 type="ArrayMesh"]

surfaces/0 = {
    "primitive":4,
    "arrays":[
        Vector3Array(0.0, 1.0, -1.0, 0.866025, -1.0, -0.5, 0.0, -1.0, -1.0, 0.866025, 1.0, -0.5, 0.866025, -1.0, 0.5, 0.866025, 1.0, 0.5, -8.74228e-08, -1.0, 1.0, -8.74228e-08, 1.0, 1.0, -0.866025, -1.0, 0.5, -0.866025, 1.0, 0.5, -0.866025, -1.0, -0.5, -0.866025, 1.0, -0.5),
        Vector3Array(0.0, 0.609973, -0.792383, 0.686239, -0.609973, -0.396191, 0.0, -0.609973, -0.792383, 0.686239, 0.609973, -0.396191, 0.686239, -0.609973, 0.396191, 0.686239, 0.609973, 0.396191, 0.0, -0.609973, 0.792383, 0.0, 0.609973, 0.792383, -0.686239, -0.609973, 0.396191, -0.686239, 0.609973, 0.396191, -0.686239, -0.609973, -0.396191, -0.686239, 0.609973, -0.396191),
        null, ; No Tangents,
        null, ; no Vertex Colors,
        null, ; No UV1,
        null, ; No UV2,
        null, ; No Bones,
        null, ; No Weights,
        IntArray(0, 2, 1, 3, 1, 4, 5, 4, 6, 7, 6, 8, 0, 5, 9, 9, 8, 10, 11, 10, 2, 1, 10, 8, 0, 1, 3, 3, 4, 5, 5, 6, 7, 7, 8, 9, 5, 0, 3, 0, 9, 11, 9, 5, 7, 9, 10, 11, 11, 2, 0, 10, 1, 2, 1, 6, 4, 6, 1, 8)
    ],
    "morph_arrays":[]
}

Animación

An animation resource consists of tracks. Besides, it has length, loop and step applied to all the tracks.

  1. length and step are both durations in seconds.

Each track is described by a list of key-value pairs in the format tracks/Id/Attribute. Each track includes:

  • type
  • path
  • interp
  • keys
  • loop_wrap
  • imported
  • enabled
  1. The type must be the first attribute of each track. The value of type can be:

    • transform
    • value
    • method
  2. The path has the format NodePath(Path/To/Node:attribute). It's the path to the animated node or attribute, relative to the root node defined in the AnimationPlayer.

  3. The interp is the method to interpolate frames from the keyframes. It is an enum variable with one of the following values:

    • 0 (constante)
    • 1 (linear)
    • 2 (cubic)
  4. The keys correspond to the keyframes. It appears as a PoolRealArray(), but may have a different structure for tracks with different types.

    • A Transform track uses every 12 real numbers in the keys to describe a keyframe. The first number is the timestamp. The second number is the transition followed by a 3-number translation vector, followed by a 4-number rotation quaternion (X, Y, Z, W) and finally a 3-number scale vector. The default transition in a Transform track is 1.0.
[sub_resource type="Animation" id=2]

length = 4.95833
loop = false
step = 0.1
tracks/0/type = "transform"
tracks/0/path = NodePath("Armature001")
tracks/0/interp = 1
tracks/0/loop_wrap = true
tracks/0/imported = true
tracks/0/enabled = true
tracks/0/keys = PoolRealArray( 0, 1, -0.0358698, -0.829927, 0.444204, 0, 0, 0, 1, 0.815074, 0.815074, 0.815074, 4.95833, 1, -0.0358698, -0.829927, 0.444204, 0, 0, 0, 1, 0.815074, 0.815074, 0.815074 )
tracks/1/type = "transform"
tracks/1/path = NodePath("Armature001/Skeleton:Bone.001")
tracks/1/interp = 1
tracks/1/loop_wrap = true
tracks/1/imported = true
tracks/1/enabled = false
tracks/1/keys = PoolRealArray( 0, 1, 0, 5.96046e-08, 0, 0, 0, 0, 1, 1, 1, 1, 4.95833, 1, 0, 5.96046e-08, 0, 0, 0, 0, 1, 1, 1, 1 )