MDL file

<legend class="caps">

Header

</legend>

16 8bit bytes in total
LF	HA	SA	TB	PC	00	-16-	PCSZ	-16-	HASZ	SASZ

<ifieldset class="spec"> <legend> swordofmoonlight.h </legend>

LF:	leadflags	perhaps bitwise flags
HA:	hardanims	JointMIMe-like animation (PSOne)
SA:	softanims	Vertex/normalMIMe-like animation
TB:	timblocks	Textures (PSOne TIM image format)
PC:	primchans	one or more required (meshes)
00:	unknown00	perhaps always one
PCSZ:	primchanwords	dword anims block offset (could be 32bit)
HASZ:	hardanimwords	dword sizeof anims block
SASZ:	softanimwords	dword sizeof diffs block

</ifieldset>

LF

This byte is not super well understood. It is either a straight value, or a bitwise combination of flag values. Known values are 0, 1, and 4. For not animated, Tinman style animation, and Scarecrow style animation respectively.

HA ¦  SA

These bytes are the number of hard and soft (aka. Tinman/Scarecrow) animations contained within the file.

TB

This byte is the number of PlayStation TIM images embedded within the file. These images are used as textures. It seems that the EneEdit tool somehow overrides the use of the embedded images, in favor of external TXR images which it is able to generate (please note that the author himself is uncertain the accuracy of this claim!!)

PC

This byte is the number of sub headers in the file, of which there is one of per each separate section of geometry (a MDL may include many such sections.)

PCSZ ¦ HASZ ¦ SASZ

These three 16bit values indicate the size of the first three data blocks. The units are in 32bit intervals. In other words, a value of 4, indicates 16 bytes. Each block begins after the previous block, therefore it is necessary to sum the preceding blocks in order to arrive at the offset to any given block. There is a fourth block, which runs to the end of the file. The four blocks respectively pertain to 3D geometry, Tinman animation, Scarecrow animation, and TIM images. The TIM images themselves can consecutively be thought of as 4th, 5th, and so on blocks. It's a matter of personal interpretation.

<legend class="tech">1st PRIMITIVE CHANNEL

Primitive channels

</legend>

7 32bit words in total
- -VB- -	- -VC- -	- -NB- -	- -NC- -	- -PB- -	- -PC- -	- -00- -

<ifieldset class="spec"> <legend> swordofmoonlight.h </legend>

VB:	vertsbase	dword offset to vertex block
VC:	vertcount
NB:	normsbase	dword offset to normal block
NC:	normcount
PB:	primsbase	dword offset to face block
PC:	primcount
00:	unknown00	probably always zero

</ifieldset>

VB ¦ NB ¦ PB

These three 32bit (the alignment is 32bit, the values themselves may be 16bit) values are offsets which should be added to the end of the header (or the beginning of the first primitive channel sub header) in order to reach the beginning of the Vertex/Normal/Primitive (face) data belonging to this primitive channel. Part of the #Per vertex location, #Per vertex lighting, and #3D primitives blocks respectively. The units are in 32bit intervals. In other words, a value of 4, indicates 16 bytes. The offsets are absolute, which is to say, not relative to one another.

VC ¦ NC ¦ PC

These three 32bit (the alignment is 32bit, the values themselves may be 16bit) values account for the number of elements expected to be found within the data indicated by VB, NB, PB respectively.

<legend>⋯</legend>

<legend>Nth PRIMITIVE CHANNEL</legend>

<legend class="tech">3D PRIMITIVES BLOCK

3D primitives

</legend>

Main article: 3D Primitive

<legend class="tech">PER VERTEX LOCATION BLOCK

Per vertex location

</legend>

Main article: 3D Vertex#Location

This block is packed with consecutive 3D vertex coordinates side by side and nothing else. See #Primitive channels and #3D primitives for more information.

two 64bit vertices
-VX-	-VY-	-VZ-	-00-	⋯	-VX-	-VY-	-VZ-	-00-

VX ¦ VY ¦ VZ

These are signed 16bit whole number values. The units are in millimeters, indicating a three dimensional point in space.

00

VX/Y/Z cover all the bases for a 3D vertex. These bits are not used (vertices must begin on 32bit word boundaries)

<legend class="tech">PER VERTEX LIGHTING BLOCK

Per vertex lighting

</legend>

Main article: 3D Vertex#Lighting

This block is packed with consecutive 3D lighting vectors (surface normals) side by side and nothing else. See #Primitive channels and #3D primitives for more information.

two 64bit normals
-NX-	-NY-	-NZ-	-00-	⋯	-NX-	-NY-	-NZ-	-00-

NX ¦ NY ¦ NZ

These are signed 16bit whole number values indicating a three dimensional surface normal. The convention is 4096:1. Not enough attention has been payed to if/when the values are normalized prior to use.

00

NX/Y/Z cover all the bases for a 3D normal. These bits are not used (normals must begin on 32bit word boundaries)

<legend class="tech">Tinman ANIMATIONS BLOCK

Tinman animations

</legend>

Main article: Tinman animation

32bits
-NC-	-00-

NC

This 16bit value accounts for the total number of animation channels. A channel may have primitives associated with it or not. Channels are arranged hierarchically / outwardly from a single top-level channel. When one channel is animated, the effect is applied accumulatively to the subordinate channels.

00

This 16bit value is not understood. It may always be 1.

<ifieldset class="spec"> <legend class="tech">1st Tinman ANIMATION

Animations by ID

</legend>

32bits
-ID-	-NF-

ID

This 16bit value identifies the context of the animation. For instance, 0 for an "idle" animation. 4 for an "open" animation (eg. a door.) The meanings of the IDs appear to be implicit rather than conventional. Ie. they are hard wired into Sword of Moonlight itself. For a complete list of known IDs, see MDL (file format) / Appendix A (animation IDs).

NF

This 16bit value accounts for the total number of sequential frames involved in the animation. The frames are not interpolated over time, and appear at regular intervals. There is no standard reference in terms of timing. However traditional (eg. original Sword of Moonlight files) playback speed is approximately 30 frames per second (reports exist that PRF files are useful for modulating playback in some way unclear / not well documented)

<ifieldset class="spec"> <legend class="tech">THE PER (Tinman) ANIMATION FRAME BUFFER

The per animation frame buffer

</legend>

</ifieldset>

</ifieldset> <ifieldset class="spec"> <legend>⋯</legend> </ifieldset> <ifieldset class="spec"> <legend>Nth Tinman ANIMATION</legend> </ifieldset>

<legend class="tech">Scarecrow ANIMATIONS BLOCK

Scarecrow animations

</legend>

Main article: Scarecrow animation

<legend class="tech">1st PlayStation .TIM IMAGE

TIM imaging

</legend>

<legend>⋯</legend>

<legend>Nth PlayStation .TIM IMAGE</legend>