Rotating Backgrounds

Macros
#define	PA_LoadRotBg(screen, bg_select, bg_tiles, bg_map, bg_size, wraparound)
	[DEPRECATED] Load a background fit for rotating/scaling! Warning, you must use PA_SetVideoMode to 1 if you want 1 rotating background (Bg3 only !), or 2 for 2 rotating backgrounds (Bg2 and 3). The background MUST be in 256 colors
#define	PA_LoadPAGfxRotBg(screen, bg_select, bg_name, wraparound)
	[DEPRECATED] Load a background fit for rotating/scaling ! Warning, you must use PA_SetVideoMode to 1 if you want 1 rotating background (Bg3 only !), or 2 for 2 rotating backgrounds (Bg2 and 3). The background MUST be in 256 colors

Functions
static void	PA_SetBgRot (u8 screen, u8 bg_select, s32 x_scroll, s32 y_scroll, s32 x_rotcentre, s32 y_rotcentre, s16 bg_angle, s32 bg_zoom)
	Rotate/Scale a RotBg.

Detailed Description

Load rotating backgrounds, move, rotate, scale them

Macro Definition Documentation

PA_LoadRotBg

#define PA_LoadRotBg	(		screen,
			bg_select,
			bg_tiles,
			bg_map,
			bg_size,
			wraparound
	)

Value:

    do{\
    PA_DEPRECATED_MACRO;\
    PA_DeleteBg(screen, bg_select);\
    PA_LoadBgTiles(screen, bg_select, bg_tiles); \
    PA_LoadRotBgMap(screen, bg_select, (void*)bg_map, bg_size); \
    PA_InitBg(screen, bg_select, bg_size, wraparound, 1);\
    PA_SetBgRot(screen, bg_select, 0, 0, 0, 0, 0, 256);\
    }while(0)

[DEPRECATED] Load a background fit for rotating/scaling! Warning, you must use PA_SetVideoMode to 1 if you want 1 rotating background (Bg3 only !), or 2 for 2 rotating backgrounds (Bg2 and 3). The background MUST be in 256 colors

Deprecated:

Parameters

screen	Chose de screen (0 or 1)
bg_select	Background number to load
bg_tiles	Name of the tiles' info (example: ship_Tiles)
bg_map	Name of the map's info (example : ship_Map)
bg_size	Background size. Use the following macros : BG_ROT_128X128, or 256X256, 512X512, or 1024X1024
wraparound	If the background wraps around or not.

PA_LoadPAGfxRotBg

#define PA_LoadPAGfxRotBg	(		screen,
			bg_select,
			bg_name,
			wraparound
	)

Value:

    do{\
    PA_DEPRECATED_MACRO;\
    PA_Load8bitBgPal(screen, (void*)bg_name##_Pal);\
    PA_LoadRotBg(screen, bg_select, bg_name##_Tiles, bg_name##_Map, PA_GetPAGfxRotBgSize(bg_name##_Info[1]), wraparound);\
    }while(0)

[DEPRECATED] Load a background fit for rotating/scaling ! Warning, you must use PA_SetVideoMode to 1 if you want 1 rotating background (Bg3 only !), or 2 for 2 rotating backgrounds (Bg2 and 3). The background MUST be in 256 colors

Deprecated:

Parameters

screen	Chose de screen (0 or 1)
bg_select	Background number to load
bg_name	Background name, like bg0
wraparound	If the background wraps around or not.

Function Documentation

PA_SetBgRot()

static inline void PA_SetBgRot ( u8  screen, u8  bg_select, s32  x_scroll, s32  y_scroll, s32  x_rotcentre, s32  y_rotcentre, s16  bg_angle, s32  bg_zoom  )

inlinestatic

Rotate/Scale a RotBg.

Parameters

screen	Chose de screen (0 or 1)
bg_select	Background number to load
x_scroll	X Scroll...
y_scroll	Y Scroll...
x_rotcentre	X position of the rotation center
y_rotcentre	Y position of the rotation center
bg_angle	Rotation Angle (0-511)
bg_zoom	Zoom (256 for no zoom)