mapframe.h

Structures

struct MapScanline

One screen line's ground-plane terms on the world map: its width scale and distance, from which its affine parameters are built.

struct MapAffineLine

One screen line's affine parameters for a background, as the HBlank DMA copies them into the BG2 or BG3 registers.

Field	Declared as
`pa, pb, pc, pd`	`s16 pa, pb, pc, pd`
`x, y`	`s32 x, y`

struct MapAffinePair

One screen line's affine parameters for BG2 and BG3.

Field	Declared as
`bg2, bg3`	`struct MapAffineLine bg2, bg3`

struct MapFrameWork

The world map's frame work in heap slot 7: the scanline terms and two pages of per-line affine parameters, one built while the other is shown.

Field	Declared as
`scanlines`	`struct MapScanline scanlines[160]`
`pages`	`struct MapAffinePair pages[2][160]`
`unk3480`	`u8 unk3480[4]`