4. data format

■MDB format

This is a binary format of the MDL format information output by 3DME.

●Structure

PDATA* (MAP_SIZE_X*MAP_SIZE_Y information)

Address of map number 0

Map number 1 address

Map number 2 address

Map number 3 address

:

:

:

Address of map number n-1

Null map object data

Object data of map number 0

Map number 1 object data

Map number 2 object data

Map number 3 object data

:

:

:

Object data of map n-1

Let n = MAP_SIZE_X * MAP_SIZE_Y.

●Caution

• The map number address indicates the storage address of the object data for that map.
• Each object is represented by an SGL PDATA structure.
• A Null map is an object with 0 polygons.

Basically, refer to the PDATA* part, see which address contains PDATA (polygon information), and output that address with slPutPolygon.

■Collision format

Automatically divides by grit unit and allows information to be recognized.

●Information that can be obtained

1. Centroid coordinates of polygon

Used to calculate which polygon you are standing on.
2. Normal vector of polygon

Used to calculate your own slope and the slope's gravity.
3. Polygon attribute number

Acquisition of attribute flags for each polygon such as "road" or "grassland"
4. polygon group number

Obtain group number for each polygon

●Header information for acquiring collision information

typedef struct {
     VECTOR norm ; /* Normal vector */
     Uint16 att; /* Attribute */
     Uint16 gru; /* group */
     FIXED cen_x; /* center */
     FIXED cen_y; /* center */
     FIXED cen_z; /* center */
} COLLISON;

typedef struct {
     COLLISON *cotbl; /* Polygon definition table */
     Uint32 nbCo; /* Number of polygons */
}CDATA;