3DS 文件导入，openGL实现

3D Studio File Format (3ds).

Autodesk Ltd.

Document Revision 0.93 - January 1997

3D-Studio File Format (.3ds)

Autodesk Ltd.

Source update provided by:

Albert Szilvasy (email: szilvasy@almos.vein.hu )

please email me Martin van Velsen, Robin Feroq or Jimm Pitts.

and I can be contacted there if my email does not work.

Autodesk has at not yet released the offical specifications of the

or any company related to Autodesk concerning the nature and contents

of the 3d-studio binary .3ds and .mli formats.

A warning beforehand. This docs describes the format of 3ds files

produced by version 3.0 and higher of 3d-studio. You can find this

version information at byte 29 in the binary file.

Contents

1. Introduction

3. 3D Editor chunks

4. Keyframer chunks

is to follow and what it is made up of, it's ID and the location of the

next block. If you don't understand a chunk you can quite simply skip it.

The next chunk pointer is relative to the start of the current chunk and

in bytes. The binary information in the 3ds file is written in a special

For example: 4A 5C (2 bytes in hex) would be 5C high byte and 4A low

byte. In a long it is: 4A 5C 3B 8F where 5C4A is the low word and 8F 3B

is the high word. And now for the chunks. A chunk is defined as:

A 3ds file has the Primary chunk ID 4D4Dh. This is always the first

chunk of the file. Within the primary chunk are the main chunks.

to give you a preview and a reference to the hierarchy of chunks,

in the file. The chunks are given a name because below the diagram is

easier to put it in some source code ( how convenient that some sample

code is included )

| | |

| | +--MAT_NAME01 (0xA000) (See mli Doc)

| |

| +--EDIT_CONFIG1 (0x0100)

| +--EDIT_CONFIG2 (0x3E3D)

| | |

| | +--RIGHT (0x0004)

| |

| | |

| | +--RIGHT (0x0004)

| +--EDIT_AMBIENT (0x2100)

| +--EDIT_OBJECT (0x4000)

| | |

| | |

| | |

| | +--OBJ_CAMERA (0x4700)

| +--EDIT_UNKNW02 (0x1201)

| +--EDIT_UNKNW03 (0x1300)

| +--EDIT_UNKNW04 (0x1400)

| +--EDIT_UNKNW05 (0x1420)

| +--EDIT_UNKNW06 (0x1450)

| +--EDIT_UNKNW07 (0x1500)

| +--EDIT_UNKNW08 (0x2200)

| +--EDIT_UNKNW09 (0x2201)

| +--EDIT_UNKNW10 (0x2210)

| +--EDIT_UNKNW11 (0x2300)

+--KEYF_UNKNWN01 (0xB00A)

+--............. (0x7001) ( viewport, same as editor )

|

+--KEYF_OBJHIERARCH (0xB010)

+--KEYF_OBJDUMMYNAME (0xB011)

A chunk type which you can find all through the file are the color chunks

COL_RGB

COL_TRU

2. Chunks anyone ?

#define MAIN3DS 0x4D4D

//------ Main Chunks

#define EDIT3DS 0x3D3D // this is the start of the editor config

#define KEYF3DS 0xB000 // this is the start of the keyframer config

//------ sub defines of EDIT3DS

#define EDIT_VIEW1 0x7001

#define EDIT_OBJECT 0x4000