math_util.c File Reference

#include <ultra64.h>
#include <mk64.h>
#include <macros.h>
#include <math_util.h>
#include <main.h>
#include "buffers.h"
#include <PR/rcp.h>
#include "data/trig_tables.h"
#include "math.h"

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Functions
UNUSED s32	func_802B4F60 (UNUSED s32 arg0, Vec3f arg1, UNUSED s32 arg2, UNUSED f32 arg3, UNUSED f32 arg4)
UNUSED void	func_802B4FF0 ()
s32	render_set_position (Mat4 arg0, s32 arg1)
f32	func_802B51E8 (Vec3f arg0, Vec3f arg1)
s32	get_angle_between_points (Vec3f arg0, Vec3f arg1)
u32	func_802B5258 (Vec3f arg0, Vec3s arg1)
void	vec3f_set (Vec3f arg0, f32 arg1, f32 arg2, f32 arg3)
void	vec3s_set (Vec3s arg0, s16 arg1, s16 arg2, s16 arg3)
void *	vec3f_copy_return (Vec3f dest, Vec3f src)
void	vec3s_copy (Vec3s dest, Vec3s src)
UNUSED void *	vec3f_set_return (Vec3f dest, f32 x, f32 y, f32 z)
void	mtxf_copy (Mat4 mat1, Mat4 mat2)
void	mtxf_copy_n_element (s32 *dest, s32 *src, s32 n)
void	mtxf_identity (Mat4 mtx)
void	add_translate_mat4_vec3f (Mat4 mat, Mat4 dest, Vec3f pos)
UNUSED void	add_translate_mat4_vec3f_lite (Mat4 mat, Mat4 dest, Vec3f pos)
void	mtxf_translate (Mat4 dest, Vec3f b)
void	func_802B5564 (Mat4 arg0, u16 *arg1, f32 arg2, f32 arg3, f32 arg4, f32 arg5, f32 arg6)
void	func_802B5794 (Mat4 mtx, Vec3f from, Vec3f to)
void	mtxf_rotate_x (Mat4 mat, s16 angle)
void	mtxf_rotate_y (Mat4 mat, s16 angle)
void	mtxf_s16_rotate_z (Mat4 mat, s16 angle)
void	func_802B5CAC (s16 arg0, s16 arg1, Vec3f arg2)
void	func_802B5D30 (s16 arg0, s16 arg1, s32 arg2)
void	func_802B5D64 (uintptr_t arg0, s16 arg1, s16 arg2, s32 arg3)
void	mtxf_scale (Mat4 mat, f32 coef)
void	func_802B5F74 (Mat4 arg0, Vec3f arg1, Vec3s arg2)
UNUSED void	func_802B60B4 (Mat4 arg0, Vec3s arg1, Vec3s arg2)
UNUSED void	func_802B6214 (Mat4 arg0, Vec3s arg1, Vec3s arg2)
UNUSED void	func_802B6374 (Vec3f arg0)
void	mtxf_translate_vec3f_mat3 (Vec3f pos, Mat3 mat)
void	mtxf_translate_vec3f_mat4 (Vec3f pos, Mat4 mat)
UNUSED void	func_802B64B0 (UNUSED s32 arg0, UNUSED s32 arg1, UNUSED s32 arg2, UNUSED s32 arg3)
void	func_802B64C4 (Vec3f arg0, s16 arg1)
void	calculate_orientation_matrix (Mat3 dest, f32 arg1, f32 arg2, f32 arg3, s16 rotationAngle)
UNUSED void	func_802B68F8 (Mat3 matrix, f32 arg1, f32 arg2, f32 arg3)
void	calculate_rotation_matrix (Mat3 destMatrix, s16 rotationAngle, f32 rotationX, f32 rotationY, f32 rotationZ)
void	func_802B6BC0 (Mat4 arg0, s16 arg1, f32 arg2, f32 arg3, f32 arg4)
void	func_802B6D58 (Mat4 arg0, Vec3f arg1, Vec3f arg2)
void	mtxf_multiplication (Mat4 dest, Mat4 mat1, Mat4 mat2)
void	mtxf_to_mtx (Mtx *dest, Mat4 src)
u16	atan2_lookup (f32 y, f32 x)
u16	atan2s (f32 x, f32 y)
f32	atan2f (f32 arg0, f32 arg1)
UNUSED f32	func_802B79F0 (f32 arg0, f32 arg1)
UNUSED u16	func_802B7B50 (f32 arg0, f32 arg1)
UNUSED void	func_802B7C18 (f32 arg0)
s16	func_802B7C40 (f32 arg0)
UNUSED void	func_802B7C6C (f32 arg0)
s16	func_802B7CA8 (f32 arg0)
f32	calculate_vector_angle_xy (f32 vectorX)
UNUSED s16	func_802B7D28 (f32 arg0)
u16	random_u16 (void)
u16	random_int (u16 arg0)
s16	func_802B7F34 (f32 arg0, f32 arg1, f32 arg2, f32 arg3)
void	func_802B7F7C (Vec3f arg0, Vec3f arg1, Vec3s dest)
f32	sins (u16 arg0)
f32	coss (u16 arg0)
s32	is_visible_between_angle (u16 arg0, u16 arg1, u16 arg2)
f32	is_within_render_distance (Vec3f cameraPos, Vec3f objectPos, u16 orientationY, f32 minDistance, f32 fov, f32 maxDistance)
UNUSED void	func_802B8414 (uintptr_t arg0, Mat4 arg1, s16 arg2, s16 arg3, s32 arg4)

Variables
s32	D_802B91C0 [2] = { 13, 13 }
Vec3f	D_802B91C8 = { 0.0f, 0.0f, 0.0f }

Function Documentation

add_translate_mat4_vec3f()

void add_translate_mat4_vec3f	(	Mat4	mat,
		Mat4	dest,
		Vec3f	pos )

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add_translate_mat4_vec3f_lite()

UNUSED void add_translate_mat4_vec3f_lite	(	Mat4	mat,
		Mat4	dest,
		Vec3f	pos )

atan2_lookup()

u16 atan2_lookup	(	f32	y,
		f32	x )

Comment from sm64 unverified. mk64 verison is modified

Helper function for atan2s. Does a look up of the arctangent of y/x assuming the resulting angle is in range [0, 0x2000] (1/8 of a circle).

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atan2f()

f32 atan2f	(	f32	arg0,
		f32	arg1 )

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atan2s()

u16 atan2s	(	f32	x,
		f32	y )

Compute the angle from (0, 0) to (x, y) as a u16. Given that terrain is in the xz-plane, this is commonly called with (z, x) to get a yaw angle. sm64 but x, y swapped and returns u16.

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calculate_orientation_matrix()

void calculate_orientation_matrix	(	Mat3	dest,
		f32	arg1,
		f32	arg2,
		f32	arg3,
		s16	rotationAngle )

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calculate_rotation_matrix()

void calculate_rotation_matrix	(	Mat3	destMatrix,
		s16	rotationAngle,
		f32	rotationX,
		f32	rotationY,
		f32	rotationZ )

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calculate_vector_angle_xy()

f32 calculate_vector_angle_xy

(

f32

vectorX

)

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coss()

f32 coss

(

u16

arg0

)

func_802B4F60()

UNUSED s32 func_802B4F60	(	UNUSED s32	arg0,
		Vec3f	arg1,
		UNUSED s32	arg2,
		UNUSED f32	arg3,
		UNUSED f32	arg4 )

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func_802B4FF0()

UNUSED void func_802B4FF0

(

)

func_802B51E8()

f32 func_802B51E8	(	Vec3f	arg0,
		Vec3f	arg1 )

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func_802B5258()

u32 func_802B5258	(	Vec3f	arg0,
		Vec3s	arg1 )

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func_802B5564()

void func_802B5564	(	Mat4	arg0,
		u16 *	arg1,
		f32	arg2,
		f32	arg3,
		f32	arg4,
		f32	arg5,
		f32	arg6 )

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func_802B5794()

void func_802B5794	(	Mat4	mtx,
		Vec3f	from,
		Vec3f	to )

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func_802B5CAC()

void func_802B5CAC	(	s16	arg0,
		s16	arg1,
		Vec3f	arg2 )

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func_802B5D30()

void func_802B5D30	(	s16	arg0,
		s16	arg1,
		s32	arg2 )

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func_802B5D64()

void func_802B5D64	(	uintptr_t	arg0,
		s16	arg1,
		s16	arg2,
		s32	arg3 )

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func_802B5F74()

void func_802B5F74	(	Mat4	arg0,
		Vec3f	arg1,
		Vec3s	arg2 )

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func_802B60B4()

UNUSED void func_802B60B4	(	Mat4	arg0,
		Vec3s	arg1,
		Vec3s	arg2 )

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func_802B6214()

UNUSED void func_802B6214	(	Mat4	arg0,
		Vec3s	arg1,
		Vec3s	arg2 )

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func_802B6374()

UNUSED void func_802B6374

(

Vec3f

arg0

)

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func_802B64B0()

UNUSED void func_802B64B0	(	UNUSED s32	arg0,
		UNUSED s32	arg1,
		UNUSED s32	arg2,
		UNUSED s32	arg3 )

func_802B64C4()

void func_802B64C4	(	Vec3f	arg0,
		s16	arg1 )

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func_802B68F8()

UNUSED void func_802B68F8	(	Mat3	matrix,
		f32	arg1,
		f32	arg2,
		f32	arg3 )

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func_802B6BC0()

void func_802B6BC0	(	Mat4	arg0,
		s16	arg1,
		f32	arg2,
		f32	arg3,
		f32	arg4 )

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func_802B6D58()

void func_802B6D58	(	Mat4	arg0,
		Vec3f	arg1,
		Vec3f	arg2 )

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func_802B79F0()

UNUSED f32 func_802B79F0	(	f32	arg0,
		f32	arg1 )

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func_802B7B50()

UNUSED u16 func_802B7B50	(	f32	arg0,
		f32	arg1 )

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func_802B7C18()

UNUSED void func_802B7C18

(

f32

arg0

)

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func_802B7C40()

s16 func_802B7C40

(

f32

arg0

)

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func_802B7C6C()

UNUSED void func_802B7C6C

(

f32

arg0

)

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func_802B7CA8()

s16 func_802B7CA8

(

f32

arg0

)

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func_802B7D28()

UNUSED s16 func_802B7D28

(

f32

arg0

)

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func_802B7F34()

s16 func_802B7F34	(	f32	arg0,
		f32	arg1,
		f32	arg2,
		f32	arg3 )

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func_802B7F7C()

void func_802B7F7C	(	Vec3f	arg0,
		Vec3f	arg1,
		Vec3s	dest )

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func_802B8414()

UNUSED void func_802B8414	(	uintptr_t	arg0,
		Mat4	arg1,
		s16	arg2,
		s16	arg3,
		s32	arg4 )

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get_angle_between_points()

s32 get_angle_between_points	(	Vec3f	arg0,
		Vec3f	arg1 )

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is_visible_between_angle()

s32 is_visible_between_angle	(	u16	arg0,
		u16	arg1,
		u16	arg2 )

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is_within_render_distance()

f32 is_within_render_distance	(	Vec3f	cameraPos,
		Vec3f	objectPos,
		u16	orientationY,
		f32	minDistance,
		f32	fov,
		f32	maxDistance )

Determines whether an object is within the render distance of a camera.

Parameters

cameraPos	The position of the camera in 3D space.
objectPos	The position of the object in 3D space.
orientationY	The orientation angle of the object around the Y-axis.
minDistance	The minimum distance at which the object is considered within render distance.
fov	The field of view (FOV) of the camera.
maxDistance	The maximum render distance.

Returns

The distance between the camera and the object if it's within render distance, or -1.0f if it exceeds the render distance.

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mtxf_copy()

void mtxf_copy	(	Mat4	mat1,
		Mat4	mat2 )

mtxf_copy_n_element()

void mtxf_copy_n_element	(	s32 *	dest,
		s32 *	src,
		s32	n )

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mtxf_identity()

void mtxf_identity

(

Mat4

mtx

)

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mtxf_multiplication()

void mtxf_multiplication	(	Mat4	dest,
		Mat4	mat1,
		Mat4	mat2 )

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mtxf_rotate_x()

void mtxf_rotate_x	(	Mat4	mat,
		s16	angle )

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mtxf_rotate_y()

void mtxf_rotate_y	(	Mat4	mat,
		s16	angle )

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mtxf_s16_rotate_z()

void mtxf_s16_rotate_z	(	Mat4	mat,
		s16	angle )

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mtxf_scale()

void mtxf_scale	(	Mat4	mat,
		f32	coef )

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mtxf_to_mtx()

void mtxf_to_mtx	(	Mtx *	dest,
		Mat4	src )

Convert float matrix 'src' to fixed point matrix 'dest'. The float matrix may not contain entries larger than 65536 or the console crashes. The fixed point matrix has entries with a 16-bit integer part, so the floating point numbers are multiplied by 2^16 before being cast to a s32 integer. If this doesn't fit, the N64 and iQue consoles will throw an exception. On Wii and Wii U Virtual Console the value will simply be clamped and no crashes occur.

float-to-integer conversion responsible for PU crashes

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mtxf_translate()

void mtxf_translate	(	Mat4	dest,
		Vec3f	b )

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mtxf_translate_vec3f_mat3()

void mtxf_translate_vec3f_mat3	(	Vec3f	pos,
		Mat3	mat )

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mtxf_translate_vec3f_mat4()

void mtxf_translate_vec3f_mat4	(	Vec3f	pos,
		Mat4	mat )

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random_int()

u16 random_int

(

u16

arg0

)

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random_u16()

u16 random_u16

(

void

)

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render_set_position()

s32 render_set_position	(	Mat4	arg0,
		s32	arg1 )

Inserts matrix into the rsp. Position, rotation and mode of where to render the next object and check number of object already render Note that gMatrixObjectCount gets reset at the beginning of the game loop. So no cleanup needs to be performed.

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sins()

f32 sins

(

u16

arg0

)

vec3f_copy_return()

void * vec3f_copy_return	(	Vec3f	dest,
		Vec3f	src )

Warning

function returns address of local variable

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vec3f_set()

void vec3f_set	(	Vec3f	arg0,
		f32	arg1,
		f32	arg2,
		f32	arg3 )

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vec3f_set_return()

UNUSED void * vec3f_set_return	(	Vec3f	dest,
		f32	x,
		f32	y,
		f32	z )

vec3s_copy()

void vec3s_copy	(	Vec3s	dest,
		Vec3s	src )

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vec3s_set()

void vec3s_set	(	Vec3s	arg0,
		s16	arg1,
		s16	arg2,
		s16	arg3 )

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Variable Documentation

D_802B91C0

s32 D_802B91C0[2] = { 13, 13 }

D_802B91C8

Vec3f D_802B91C8 = { 0.0f, 0.0f, 0.0f }