MKAGP BIN (File Format)

MKAGP BIN is a collision format used in Mario Kart Arcade GP and Mario Kart Arcade GP 2.

File Format

The file byte order is always big endian.

Header

The file starts with the following header:

Offset	Type	Description
0x00	Int32	Grid width (W).
0x04	Int32	Grid length (L).
0x10	Float	Grid cell X size.
0x14	Float	Grid cell Y size.
0x18	Float[3]	AABB minimum coordinate.
0x24	Float[3]	AABB maximal coordinate.

Grid

At the end of the file, the grid cell headers are stored in 0x10 byte blocks, starting at EOF - (W * L * 0x10) - 0x10.

Cell

All offsets are absolute.

Offset	Type	Description
0x00	UInt32	Triangles offset. Garbage data if none for this cell.
0x04	Int32	Number of Triangles.
0x08	UInt32	Cubes offset. Garbage data if none for this cell.
0x0C	Int32	Number of Quads.

Triangle

Offset	Type	Description
0x00	Float[2]	Minimul coordinate for this triangle.
0x08	Float[2]	Maximal coordinate for this triangle.
0x10	Float[3][3]	Triangle vertices XYZ position.
0x34	Float[3][3]	Triangle edges XYZ position.
0x58	UInt32	Neighbour triangle flag, used to determine which edges connect to other triangles.
0x5C	UInt32	MKAGP BIN flag.
0x60	Float[3]	Triangle normal.
0x6C	Float	Negative dot product between triangle center and triangle normal.

Quad

These seem to be used for the wall collision.

Offset	Type	Description
0x00	Float[2][4]	Quad XZ positions.

Tools

The following tools can handle MKAGP BIN files:

• (none)