Resources/DvScene

DvScene (also known as DiEvent) is a file format that's been used in Hedgehog Engine 2 since Sonic Frontiers, it's a collection of nodes and resources that are easily editable for simple modification or creation of new cutscenes/cinematics.

The format and sub-system originates from the Yakuza game series in which it was known as DiEvent.

There are no proper ways currently to edit .dvscene except for an 010 Editor Binary Template.

Basic information

Each DvScene consists of 2 parts, DvCommon and DvResource.

DvCommon

DvCommon consists of:

• Frame start and end.
• Number of visual nodes (not confirmed).
• Cuts, the timestamps of every camera cut in the cinematic.
• Pages, for skipping frames in the cutscene, based on a set condition. Used for QTEs.
• Resource Cuts, timestamps when the Resources should deload (all of the time it's a single item, obviously).
• Node, the main Path DvNode.

The main path DvNode is the base node of the entire dvscene. Path standing for its Node Category.

Every DvNode contains:

• GUID, used to connect the node to resources or just to easily tell them apart. Every node has a unique GUID.
• Name, to easily organize the nodes.
• Node Category, changes the nodes type, each node type does something else.
• Node Flags
• Priority
• Child Nodes, the child nodes of the node.
• Node Data, the parameters and values that change based on the Node Category.

The node data is dependant on the Node Category, every category has its own set of parameters.

Node Categories in Sonic Frontiers

Name	Description	In-Engine Name	Basic structure
Path	Transforms the child nodes of this node	DvNodePath	Contains a Matrix4x4 which is then used to do transforms.
Camera	Creates a Camera Object in to the cinematic	DvNodeCamera	Usually empty, but it has support for a list of Frame Progressions, used to skip frames in the camera animation.
Camera Motion	Adds animation to the parent node Camera	DvNodeCameraMotion	Contains the frame start and end of the camera animation. The GUID connects the node to a Resource to set the Camera Animation file.
Character	Creates a Character Model Object in to the cinematic	DvNodeCharacter	Contains the Model Name, Skeleton Name and sometimes a so called Internal Name is used; mostly used for characters that are very common, such as Sonic, Tails etc. These have a special shortcut for each, i.e. sh - Shadow, snc - Sonic, kn - Knuckles. The GUID connects the node to a Resource to set the Animation State Machine file.
Character Motion	Adds animation to the parent node Character	DvNodeCharacterMotion	Contains the frame start and end of the animation, Animation State Machine state name and animation speed. The GUID connects the node to a Resource to set the animation file.
Model	Adds a Model Object in to the cinematic	DvNodeModel	The exact same as Character.
Model Motion	Adds animation to the parent node Model	DvNodeModelMotion	The exact same as Character Motion
Model Node	Creates a node to which other nodes can be attached as if it was the bone of the parent Character node	DvNodeModelNode	Contains the bones name.
Element	Subcategory for nodes, contains mostly game specific elements such as DvElementRifleBeastLighting from Sonic Frontiers	DvElement	Contains the Element ID, frame start and end, play type of the element and update timing of the element. There's only 3 Element Play Types and they're very straight forward, Normal - plays the element normally; OneShot - plays only once; Always - plays always. Update timing is a value that consists of multiple different types to change the update timings of the element, alot of these have yet to be found purposes.

DvResource

DvResource is an array of resources that are loaded for a DvScene. These are connected with GUIDs to several DvNode types.

They only consist of a filename, GUID and file type.

Resource Types in Sonic Frontiers

Name	File extension	Used by Node
Character	(.asm)	Character
Camera Motion	(.cam-anim)	Camera Motion
Character Motion	(.anm.pxd)	Character Motion
Model	(.asm)	Model

TODO: (c-style structs, technical notes)