C interface to math library. More...

#include "xrt/xrt_defines.h"

Include dependency graph for m_api.h:

Macros
#define	MATH_GRAVITY_M_S2 (9.8066)
	Standard gravity acceleration constant. More...

#define	MIN(A, B) ((A) < (B) ? (A) : (B))
	Minimum of A and B. More...

#define	MAX(A, B) ((A) > (B) ? (A) : (B))
	Maximum of A and B. More...

#define	CLAMP(X, A, B) (MIN(MAX((X), (A)), (B)))
	X clamped to the range [A, B]. More...

Functions
size_t	math_hash_string (const char *str_c, size_t length)
	Generate a hash value from the given string, trailing zero not included. More...

void	math_matrix_3x3_identity (struct xrt_matrix_3x3 *mat)
	Initialize a 3x3 matrix to the identity matrix. More...

void	math_matrix_3x3_from_quat (const struct xrt_quat q, struct xrt_matrix_3x3 result_out)
	Initialize a 3x3 matrix from a quaternion. More...

void	math_matrix_3x3_f64_identity (struct xrt_matrix_3x3_f64 *mat)
	Initialize a double 3x3 matrix to the identity matrix. More...

void	math_matrix_3x3_transform_vec3 (const struct xrt_matrix_3x3 left, const struct xrt_vec3 right, struct xrt_vec3 *result_out)
	Transform a vec3 by a 3x3 matrix. More...

void	math_matrix_4x4_transform_vec3 (const struct xrt_matrix_4x4 left, const struct xrt_vec3 right, struct xrt_vec3 *result_out)
	Transform a vec3 by a 4x4 matrix, extending the vector with w = 1.0. More...

void	math_matrix_3x3_f64_transform_vec3_f64 (const struct xrt_matrix_3x3_f64 left, const struct xrt_vec3_f64 right, struct xrt_vec3_f64 *result_out)
	Transform a double vec3 by a 3x3 double matrix. More...

static double	math_map_ranges (double value, double from_low, double from_high, double to_low, double to_high)
	Map a number from one range to another range. More...

static double	math_lerp (double from, double to, double amount)

bool	math_compute_fovs (double w_total, double w_1, double horizfov_total, double h_total, double h_1, double vertfov_total, struct xrt_fov *fov)
	Perform the computations from "Computing Half-Fields-Of-View from Simpler Display Models", to get half-FOVs from things we can retrieve from other APIs. More...

Detailed Description

C interface to math library.

Author: Jakob Bornecrantz jakob.nosp@m.@col.nosp@m.labor.nosp@m.a.co.nosp@m.m; Moses Turner moses.nosp@m.turn.nosp@m.er@pr.nosp@m.oton.nosp@m.mail..nosp@m.com; Nis Madsen nima_.nosp@m.zero.nosp@m._one@.nosp@m.prot.nosp@m.onmai.nosp@m.l.co.nosp@m.m

See also: xrt_vec3; xrt_quat; xrt_pose; xrt_space_relation

Function Documentation

◆ math_map_ranges()

static double math_map_ranges	(	double	value,
		double	from_low,
		double	from_high,
		double	to_low,
		double	to_high
	)

inlinestatic

Map a number from one range to another range.

Exactly the same as Arduino's map().

Macros

Functions

Detailed Description

Function Documentation

◆ math_map_ranges()