collision.h File Reference

#include <common_structs.h>

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Macros
#define	COLLISION   0x1
#define	NO_COLLISION   0x0

Functions
void	nullify_displaylist (uintptr_t)
void	func_802AAAAC (Collision *)
f32	func_802AAB4C (Player *)
s32	check_collision_zx (Collision *, f32, f32, f32, f32, u16)
s32	check_collision_yx (Collision *, f32, f32, f32, f32, u16)
s32	check_collision_zy (Collision *, f32, f32, f32, f32, u16)
s8	get_surface_type (u16)
s16	get_track_section_id (u16)
s16	func_802ABD7C (u16)
s16	func_802ABDB8 (u16)
s16	func_802ABDF4 (u16)
f32	calculate_surface_height (f32, f32, f32, u16)
f32	func_802ABEAC (Collision *, Vec3f)
void	shell_collision (Collision *, Vec3f)
void	process_shell_collision (Vec3f, f32, Vec3f, f32)
u16	player_terrain_collision (Player *, KartTyre *, f32, f32, f32)
void	adjust_pos_orthogonally (Vec3f, f32, Vec3f, f32)
s32	detect_tyre_collision (KartTyre *)
u16	actor_terrain_collision (Collision *, f32, f32, f32, f32, f32, f32, f32)
u16	check_bounding_collision (Collision *, f32, f32, f32, f32)
f32	get_surface_height (f32, f32, f32)
	Returns the height of the surface below the provided position. Used to set actors onto the course mesh. If unable to spawn actor on the surface set to -3000.0f or if outside the collision grid, spawn in the air (3000.0f).
void	set_vtx_buffer (uintptr_t, u32, u32)
s32	is_line_intersecting_rectangle (s16, s16, s16, s16, s16, s16, s16, s16)
s32	is_triangle_intersecting_bounding_box (s16, s16, s16, s16, u16)
void	generate_collision_grid (void)
void	generate_collision_mesh_with_defaults (Gfx *)
void	generate_collision_mesh_with_default_section_id (Gfx *, s8)
void	generate_collision_mesh (Gfx *, s8, u16)
void	find_and_set_tile_size (uintptr_t, s32, s32)
void	set_vertex_colours (uintptr_t, u32, s32, s8, u8, u8, u8)
void	find_vtx_and_set_colours (uintptr_t, s8, u8, u8, u8)
void	subtract_scaled_vector (Vec3f, f32, Vec3f)

Macro Definition Documentation

COLLISION

#define COLLISION   0x1

NO_COLLISION

#define NO_COLLISION   0x0

Function Documentation

actor_terrain_collision()

u16 actor_terrain_collision	(	Collision *	collision,
		f32	boundingBoxSize,
		f32	newX,
		f32	newY,
		f32	newZ,
		f32	oldX,
		f32	oldY,
		f32	oldZ )

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adjust_pos_orthogonally()

void adjust_pos_orthogonally	(	Vec3f	,
		f32	,
		Vec3f	,
		f32	)

calculate_surface_height()

f32 calculate_surface_height	(	f32	x,
		f32	y,
		f32	z,
		u16	index )

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check_bounding_collision()

u16 check_bounding_collision	(	Collision *	collision,
		f32	boundingBoxSize,
		f32	posX,
		f32	posY,
		f32	posZ )

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check_collision_yx()

s32 check_collision_yx	(	Collision *	collision,
		f32	boundingBoxSize,
		f32	posX,
		f32	posY,
		f32	posZ,
		u16	index )

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check_collision_zx()

s32 check_collision_zx	(	Collision *	collision,
		f32	boundingBoxSize,
		f32	posX,
		f32	posY,
		f32	posZ,
		u16	index )

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check_collision_zy()

s32 check_collision_zy	(	Collision *	collision,
		f32	boundingBoxSize,
		f32	posX,
		f32	posY,
		f32	posZ,
		u16	index )

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detect_tyre_collision()

s32 detect_tyre_collision

(

KartTyre *

tyre

)

Bug

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find_and_set_tile_size()

void find_and_set_tile_size	(	uintptr_t	addr,
		s32	uls,
		s32	ult )

Search for G_SETTILESIZE and set its args.

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find_vtx_and_set_colours()

void find_vtx_and_set_colours	(	uintptr_t	displayList,
		s8	alpha,
		u8	red,
		u8	green,
		u8	blue )

Recursive search for vertices and set their colour values.

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func_802AAAAC()

void func_802AAAAC

(

Collision *

collision

)

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func_802AAB4C()

f32 func_802AAB4C

(

Player *

player

)

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func_802ABD7C()

s16 func_802ABD7C

(

u16

index

)

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func_802ABDB8()

s16 func_802ABDB8

(

u16

index

)

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func_802ABDF4()

s16 func_802ABDF4

(

u16

index

)

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func_802ABEAC()

f32 func_802ABEAC	(	Collision *	collision,
		Vec3f	pos )

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generate_collision_grid()

void generate_collision_grid

(

void

)

Splits the collision mesh into 32x32 sections. This allows the game to check only nearby geography for a collision rather than checking against the whole collision mesh. (checking against the whole mesh for every actor would be expensive)

Warning

gNextFreeMemoryAddress incremented just outside this function. Bad practice to hide memory allocation like this.

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generate_collision_mesh()

void generate_collision_mesh	(	Gfx *	addr,
		s8	surfaceType,
		u16	sectionId )

Generate via a recursive search and set for vertex data.

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generate_collision_mesh_with_default_section_id()

void generate_collision_mesh_with_default_section_id	(	Gfx *	gfx,
		s8	surfaceType )

Recursive search for vtx and set sectionId's to 0xFF

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generate_collision_mesh_with_defaults()

void generate_collision_mesh_with_defaults

(

Gfx *

gfx

)

Recursive search for vtx and set surfaceTypes to -1 and sectionId's to 0xFF

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get_surface_height()

f32 get_surface_height	(	f32	posX,
		f32	posY,
		f32	posZ )

Returns the height of the surface below the provided position. Used to set actors onto the course mesh. If unable to spawn actor on the surface set to -3000.0f or if outside the collision grid, spawn in the air (3000.0f).

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get_surface_type()

s8 get_surface_type

(

u16

index

)

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get_track_section_id()

s16 get_track_section_id

(

u16

index

)

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is_line_intersecting_rectangle()

s32 is_line_intersecting_rectangle	(	s16	minX,
		s16	maxX,
		s16	minZ,
		s16	maxZ,
		s16	x1,
		s16	z1,
		s16	x2,
		s16	z2 )

Returns

1 intersecting triangle, 0 not intersecting.

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is_triangle_intersecting_bounding_box()

s32 is_triangle_intersecting_bounding_box	(	s16	minX,
		s16	maxX,
		s16	minZ,
		s16	maxZ,
		u16	index )

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nullify_displaylist()

void nullify_displaylist

(

uintptr_t

addr

)

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player_terrain_collision()

u16 player_terrain_collision	(	Player *	player,
		KartTyre *	tyre,
		f32	tyre2X,
		f32	tyre2Y,
		f32	tyre2Z )

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process_shell_collision()

void process_shell_collision	(	Vec3f	,
		f32	,
		Vec3f	,
		f32	)

set_vertex_colours()

void set_vertex_colours	(	uintptr_t	,
		u32	,
		s32	,
		s8	,
		u8	,
		u8	,
		u8	)

set_vtx_buffer()

void set_vtx_buffer	(	uintptr_t	addr,
		u32	numVertices,
		u32	bufferIndex )

Generates a list of pointers to course vtx.

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shell_collision()

void shell_collision	(	Collision *	collision,
		Vec3f	velocity )

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subtract_scaled_vector()

void subtract_scaled_vector	(	Vec3f	pos1,
		f32	boundingBoxSize,
		Vec3f	pos2 )

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