A PHY file is a file with the .phy extension that contains proprietary collision model data. It is typically associated with a game engine and used to define how objects collide with each other within the game world.
Here's a breakdown of what that means:
-
Collision Model Data: This data describes the physical shape of an object in the game. This shape is used to determine when that object comes into contact with other objects, such as walls, floors, or other characters.
-
Proprietary Format: The
.phyformat is specific to the source where it is created. This means that the structure of the data within the file is defined by the program that creates it. -
Rigid or Jointed (Ragdoll) Collision Model: The data stored in the PHY file can represent either a simple, rigid body or a more complex, jointed structure, like a ragdoll. Rigid bodies are treated as a single, inflexible unit, while ragdolls are composed of multiple connected parts that can move independently.
-
Associated with the MDL File: PHY files are usually linked to a Model Data (MDL) file. The MDL file defines the visual appearance of the object, and the PHY file defines its collision properties.
-
Key-Value Data: PHY files can also store key-value pairs that provide additional information about the model. This could include settings such as which "gib" models to use when the object is destroyed, allowing for more realistic and varied destruction effects. Gibs are small pieces of a model that are scattered when it's destroyed.
In summary, a PHY file is a crucial component in defining the physical interactions of objects within a game or simulation environment. It bridges the gap between the visual representation of a model and its behavior when it collides with other objects.
