cs_rotation.c File Reference

#include "cs_defs.h"
#include <assert.h>
#include <math.h>
#include <string.h>
#include "bft_mem.h"
#include "cs_base.h"
#include "cs_math.h"
#include "cs_time_step.h"
#include "cs_timer.h"
#include "cs_rotation.h"

Include dependency graph for cs_rotation.c:

Functions
void	cs_rotation_define (double omega_x, double omega_y, double omega_z, double invariant_x, double invariant_y, double invariant_z)
	Define a global rotation. More...
void	cs_rotation_matrix (double theta, const double axis[3], const double invariant_point[3], double matrix[3][4])
	Compute rotation matrix. More...
void	cs_rotation_update_coords (cs_lnum_t n_coords, double t_rot, cs_real_3_t coords[])
	Update coordinates based on a global rotation and time. More...
void	cs_rotation_cyl_v (const cs_rotation_t *r, const cs_real_t coords[3], const cs_real_t v[3], cs_real_t vc[3])
	Express a vector in the cyclindrical system associated to a rotation. More...
void	cs_rotation_to_array (int r_num, cs_real_t fra[8])
	Copy rotation structure values to an array. More...

Function Documentation

cs_rotation_cyl_v()

void cs_rotation_cyl_v	(	const cs_rotation_t *	r,
		const cs_real_t	coords[3],
		const cs_real_t	v[3],
		cs_real_t	vc[3]
	)

Express a vector in the cyclindrical system associated to a rotation.

Parameters

[in]	r	pointer to rotation structure
[in]	coords	cartesian coordinates of the location point
[in]	v	vector components in cartesian coordinates system
[out]	vc	vector components in cylindrical coordinates system

cs_rotation_define()

void cs_rotation_define	(	double	omega_x,
		double	omega_y,
		double	omega_z,
		double	invariant_x,
		double	invariant_y,
		double	invariant_z
	)

Define a global rotation.

The rotation vector's length determines the angular velocity (in rad/s).

Parameters

[in]	omega_x	rotation vector x component
[in]	omega_y	rotation vector y component
[in]	omega_z	rotation vector z component
[in]	invariant_x	invariant point x component
[in]	invariant_y	invariant point y component
[in]	invariant_z	invariant point z component

cs_rotation_matrix()

void cs_rotation_matrix	(	double	theta,
		const double	axis[3],
		const double	invariant_point[3],
		double	matrix[3][4]
	)

Compute rotation matrix.

Parameters

[in]	theta	rotation angle, in radians
[in]	axis	rotation axis direction vector
[in]	invariant_point	invariant point coordinates
[out]	matrix	resulting rotation matrix

cs_rotation_to_array()

void cs_rotation_to_array	(	int	r_num,
		cs_real_t	fra[8]
	)

Copy rotation structure values to an array.

This may be useful to avoid requiring specific type mappings for MPI or other programming languages.

Parameters

[in]	r_num	rotation number (1 to n numbering, 0 for none)
[in]	fra	flat rotation array: axis (0-2), invariant(3-5), omega (6), angle(7)

cs_rotation_update_coords()

void cs_rotation_update_coords	(	cs_lnum_t	n_coords,
		double	t_rot,
		cs_real_3_t	coords[]
	)

Update coordinates based on a global rotation and time.

Parameters

[in]	n_coords	number of coordinates
[in]	t_rot	time since rotation start
[in,out]	coords	coordinates array