The Longest Journey CIR

CIR

Format type: Mesh
Endianness: Little-endian

Format Specifications

uint32 {4} - identifier (4)

uint32 {4}   - format version (16 or 256 allowed)
uint32 {4}   - Unknown (only in version 256)
uint32 {4}   - unused (0xdeadbabe)
float {4}    - Unknown
uint32 {4}   - number of materials
// for each material

uint32 {4} - length of material name

char {x} - material name

uint32 {4} - Unknown

uint32 {4} - length of texture name

char {x} - texture name

float {4} - red colour component

float {4} - green colour component

float {4} - blue colour component

uint32 {4} - number of unknown entries (usually zero)
// for each unknown entry

float {4} - Unknown

uint32 {4} - number of joints
// for each joint

uint32 {4} - length of joint name (usually zero)

char {x} - joint name

float {4} - Unknown (usually near 1.0)

uint32 {4} - number of child joints

// for each child joint

uint32 {4} - child joint index

uint32 {4} - number of mesh groups (usually one)
// for each mesh group

uint32 {4} - length of mesh group name

char {x} - mesh group name (usually "-noselgroup-")

uint32 {4} - number of faces

// for each face

uint32 {4} - material index

uint32 {4} - number of vertices

// for each vertex

float {4} - X coordinate relative to first joint

float {4} - Y coordinate relative to first joint

float {4} - Z coordinate relative to first joint

float {4} - X coordinate relative to second joint

float {4} - Y coordinate relative to second joint

float {4} - Z coordinate relative to second joint

float {4} - X component of vertex normal vector

float {4} - Y component of vertex normal vector

float {4} - Z component of vertex normal vector

float {4} - S texture coordinate

float {4} - T texture coordinate

uint32 {4} - index of first joint

uint32 {4} - index of second joint

float {4} - weight of first joint

uint32 {4} - number of triangles

// for each triangle

uint32 {4} - first vertex index

uint32 {4} - second vertex index

uint32 {4} - third vertex index

uint32 {4} - number of unknown entries (usually zero)

// for each unknown entry

float {4} - Unknown

uint32 {4} - Unknown

uint32 {4} - number of unknown entries (usually zero)

// for each unknown entry

uint32 {4} - length of unknown string

char {x} - Unknown

float {4} - Unknown

uint32 {4} - Unknown

Notes and Comments

CIR files contain 3D meshes including skeletal definitons and material libraries. Since there are no joint positions and rotations given, an animation file is needed to properly display the model.
The original game engine utilizes Direct3D, thus the model is prepared for a left-handed coordinate system.
Depending on the representation of the texture in memory, the T coordinate might have to be changed to 1 - T to correctly apply the texture.
The material colours (probably ambient and diffuse) should only be used if no texture is given (i. e. the texture name is empty).