Lights (Metroid Prime)

The Lights section in Metroid Prime areas defines several different types of lights: spot, point, directional, and custom. The exact behavior for each type of light is not entirely known, however they all use the same struct. The only difference is how they're utilized by the engine.

This file format needs more research Need to research meaning behind remaining unknowns

Format

The header for the light section is extremely simple and consists of the magic value 0xBABEDEAD. It's then followed by two arrays of lights, each preceded by a light count.

Light

Each light is a 0x41-byte struct that consists of the following data:

Offset	Type	Description	Notes
0x0	long	Light Type
0x4	float3	Light Color
0x10	float3	Position
0x1C	float3	Direction
0x28	float	Unknown	Used as a color multiplier for local ambient, and used to calculate attenuation for spot/custom.
0x2C	float	Spot Cutoff
0x30	float	Unknown
0x34	byte	Quadratic Cutoff
0x35	float	Light Factor
0x39	long	Unknown	Modifies how attenuation is calculated. Possible values range from 0-2.
0x3D	float	Unknown
0x41	End of light

Light Types

The first value in each light is a type value. These are the possible values:

Type	Name
0x0	Local Ambient
0x1	Directional
0x3	Spot
Other	Custom