AMDL (Animated Model)

These objects represent Animated Models. Each model contains a BLKS Texture list, a VTXS Vertex list and a INDS Triangle list. Each model can also contain a FRMS list and a JNTS Joint list.

FRMS

This chunk contains transformation matrices for the animations. Each entry contains one 64-byte 4x4 transformation matrix (stored in top-to-bottom left-to-right order) for each joint in the model, with each value in the transformation matrix being a 4-byte float.

The individual animation start and end frames and the framerates are stored in the environment object in the environment.rs5 file.

JNTS

This chunk contains the name, transformation matrix, and the index of the joint's parent joint. Each entry is 196 bytes long.

Offset	Size	Type	Meaning
0x0000	128	ASCIZ	Null-terminated name of the joint
0x0080	64	float[,]	Reverse binding matrix of the joint. Stored in top-to-bottom left-to-right order.
0x00c0	4	int	Index of the parent joint of this joint. Set to -1 if this joint is the root joint.

BLKS

This chunk contains the list of textures used by the model, and the range of vertices and triangle vertices these textures apply to. Each entry is 144 bytes long.

Offset	Size	Type	Meaning
0x0000	128	ASCIZ	Name of the object containing the texture
0x0080	4	int	Index of first vertex the texture applies to
0x0084	4	int	Index after the last vertex the texture applies to
0x0088	4	int	Index of first triangle vertex the texture applies to
0x008c	4	int	Index after the last triangle vertex the texture applies to

VTXS

This chunk contains the coordinates and normals of the vertices in the mesh. Each entry is 32 bytes long.

Offset	Size	Type	Meaning
0x0000	4	float	X coordinate of vertex
0x0004	4	float	Y coordinate of vertex
0x0008	4	float	Z coordinate of vertex
0x000c	4	float	S texture coordinate of vertex
0x0010	4	float	inverted T texture coordinate of vertex
0x0014	4	byte[]	Appears to be the normal of the vertex in {Z, Y, X} order and biased unsigned byte format, where 0x01 is -1.0, 0x80 is 0.0, and 0xFF is 1.0
0x0018	4	byte[]	Indices of joints affecting this vertex
0x001c	4	byte[]	Influences of above joints, where 0x00 is no influence and 0xFF is 100% influence. These influences should add to 0xFF.

INDS

This chunk contains the indexes of the vertices of the triangles in the mesh. These indices are absolute indices into the vertices in the VTXS chunk. Each triangle takes 3 entries, each a 4 byte integer index.