Data Structures
struct	RuntimeUnusedEntry
	An eight-byte runtime entry contains the ldr/bx instructions and a target word. More...
struct	RuntimeMathBinaryEntry
	A runtime table entry whose two-argument target this routine calls, the arctangent. More...
struct	RuntimeMathUnaryEntry
	A runtime table entry whose one-argument target this routine calls, the sine or the cosine. More...
struct	RuntimeMathTable
	The runtime table's prefix through Trig_Cos, in its assembly order. More...
struct	Position
	The camera's eye or target point, as this routine reads it. More...
struct	ScanVertex
	One scanline of the world map's ground plane. More...
struct	BgAffine
	One background's affine registers, BG2PA to BG2Y. More...

Macros
#define	VISIBLE_SCANLINES 160
	visible scanlines

Functions
	STATIC_ASSERT (sizeof(struct RuntimeUnusedEntry)==8)
	STATIC_ASSERT (sizeof(struct RuntimeMathBinaryEntry)==8)
	STATIC_ASSERT (sizeof(struct RuntimeMathUnaryEntry)==8)
	STATIC_ASSERT (offsetof(struct RuntimeMathTable, atan2)==64)
	STATIC_ASSERT (offsetof(struct RuntimeMathTable, sin)==88)
	STATIC_ASSERT (offsetof(struct RuntimeMathTable, cos)==96)
void	Transform_UpdateVertices (struct Position eye, struct Position target, struct ScanVertex line, struct BgAffine affine)
	Builds the world map's per-scanline affine table for one frame: the ground plane seen from eye towards target.

Variables
const struct RuntimeMathTable	FarCall_RuntimeTable
u32	gScanlineAngle

Macro Definition Documentation

◆ VISIBLE_SCANLINES

#define VISIBLE_SCANLINES 160

visible scanlines

Definition at line 8 of file vertices.c.

Referenced by Transform_UpdateVertices().

Function Documentation

◆ STATIC_ASSERT() [1/6]

STATIC_ASSERT ( sizeof(struct RuntimeUnusedEntry) = =8 )

◆ STATIC_ASSERT() [2/6]

STATIC_ASSERT ( sizeof(struct RuntimeMathBinaryEntry) = =8 )

◆ STATIC_ASSERT() [3/6]

STATIC_ASSERT ( sizeof(struct RuntimeMathUnaryEntry) = =8 )

◆ STATIC_ASSERT() [4/6]

STATIC_ASSERT ( offsetof(struct RuntimeMathTable, atan2) = =64 )

◆ STATIC_ASSERT() [5/6]

STATIC_ASSERT ( offsetof(struct RuntimeMathTable, sin) = =88 )

◆ STATIC_ASSERT() [6/6]

STATIC_ASSERT ( offsetof(struct RuntimeMathTable, cos) = =96 )

◆ Transform_UpdateVertices()

void Transform_UpdateVertices	(	struct Position *	eye,
		struct Position *	target,
		struct ScanVertex *	line,
		struct BgAffine *	affine )

Builds the world map's per-scanline affine table for one frame: the ground plane seen from eye towards target.

line points at the 160 scanlines' ground terms, whose rotation terms stay cached while the yaw (gScanlineAngle) is unchanged; affine receives each line's parameters twice, for BG2 and then BG3, as the HBlank DMA writes both. Copied to RAM (heap slot 46) by Map_InitializePerspectiveScene, which runs it once, and run from there each frame by WorldMap_UpdateView into the affine page of the frame's parity. Writes gScanlineAngle when the yaw changes.

Definition at line 88 of file vertices.c.

Referenced by Map_InitializePerspectiveScene(), and Transform_UpdateVertices().

Variable Documentation

◆ FarCall_RuntimeTable

const struct RuntimeMathTable FarCall_RuntimeTable

extern

Referenced by STATIC_ASSERT(), and Transform_UpdateVertices().

◆ gScanlineAngle

u32 gScanlineAngle