cordic.h File Reference

Cordic Routines Handle angle outside of the first quadrant Added standalone test to verify CORDIC against math library Add Documentation and references. More...

#include "cordic2c_inc.h"

Go to the source code of this file.

Data Structures
struct	point
	Point definition. More...

Functions
MEMSPACE double	deg2rad (double deg)
	Convert Degrees to Rads. More...
double	angle_quad (double quads, int *quad)
	Compute quadrant of angle and the quadrant modulus Note: Integer part is quadrant. More...
void	Circular (Cordic_T x, Cordic_T y, Cordic_T z)
	Main Cordic routine - used for basic trig and vector rotations. More...
MEMSPACE void	cordic_quad (double angle, double *s, double *c)
	Compute Sin and Cos from angle in quads using Cordic. More...
MEMSPACE void	cordic_deg (double deg, double *s, double *c)
	Compute Sin and Cos from angle in degrees using Cordic. More...
MEMSPACE void	cordic_rad (double rad, double *s, double *c)
	Compute Sin and Cos from angle in Rads using Cordic. More...
MEMSPACE void	scale_point (point *P, double scale)
	Scale x,y,z by scale factor. More...
MEMSPACE void	shift_point (point *P, point *shift)
	Shift x,y,z by shift. More...
MEMSPACE void	rotate (point *P, point *V)
	Rotate point P by View point. More...
MEMSPACE void	PerspectiveProjection (point *P, double scale, int x, int y)

Detailed Description

Cordic Routines Handle angle outside of the first quadrant Added standalone test to verify CORDIC against math library Add Documentation and references.

See also

http://en.wikipedia.org/wiki/CORDIC

cordic.h, we use fixed point numbers, where 1.0=Cordic_One Note: 1.0 = 90 degrees

Copyright © 2015 Mike Gore, GPL License

You are free to use this code under the terms of GPL

please retain a copy of this notice in any code you use it in.

This is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file cordic.h.

Function Documentation

double angle_quad	(	double	quads,
		int *	quad
	)

Compute quadrant of angle and the quadrant modulus Note: Integer part is quadrant.

See also

cordic.h, we use fixed point numbers, where 1.0=Cordic_One Note: 1.0 = 90 degrees

Parameters

[in]	quads	1.0 = 90 degrees
[out]	quad	quadrant 0 = 0 .. 89.9999, 1 = 90 ... 179.999 ..., etc

Returns

fractional part of quads

Definition at line 71 of file cordic.c.

Referenced by cordic_quad().

void Circular	(	Cordic_T	x,
		Cordic_T	y,
		Cordic_T	z
	)

Main Cordic routine - used for basic trig and vector rotations.

See also

http://en.wikipedia.org/wiki/CORDIC

Parameters

[in,out]	x	Cordik_K, out: Cos of z
[in,out]	y	0, out: Sin of z
[in,out]	z	fixed point version of angle

Returns

void

Definition at line 103 of file cordic.c.

Referenced by cordic_quad(), and main().

MEMSPACE void cordic_deg	(	double	deg,
		double *	s,
		double *	c
	)

Compute Sin and Cos from angle in degrees using Cordic.

See also

http://en.wikipedia.org/wiki/CORDIC

Parameters

[in]	deg	angle in degrees
[in,out]	*s	sin
[in,out]	*c	cos

Returns

void

Definition at line 215 of file cordic.c.

Referenced by PerspectiveProjection(), and rotate().

MEMSPACE void cordic_quad	(	double	angle,
		double *	s,
		double *	c
	)

Compute Sin and Cos from angle in quads using Cordic.

See also

http://en.wikipedia.org/wiki/CORDIC

Parameters

[in]	angle	angle in quads ( 1 quad = 90 degrees)
[out]	*s	sin
[out]	*c	cos

Returns

void

Definition at line 144 of file cordic.c.

Referenced by cordic_deg(), and cordic_rad().

MEMSPACE void cordic_rad	(	double	rad,
		double *	s,
		double *	c
	)

Compute Sin and Cos from angle in Rads using Cordic.

See also

http://en.wikipedia.org/wiki/CORDIC

Parameters

[in]	rad	angle in radians
[out]	*s	sin
[out]	*c	cos

Returns

void

Definition at line 228 of file cordic.c.

MEMSPACE double deg2rad

(

double

deg

)

Convert Degrees to Rads.

Parameters

[in]

deg

degrees

Returns

radians

Convert Degrees to Rads.

Parameters

[in]

deg

degrees

Returns

radians

Definition at line 57 of file cordic.c.

Referenced by main().

MEMSPACE void PerspectiveProjection	(	point *	P,
		double	scale,
		int	x,
		int	y
	)

Definition at line 310 of file cordic.c.

Referenced by wire_draw().

MEMSPACE void rotate	(	point *	P,
		point *	V
	)

Rotate point P by View point.

Parameters

[in]	*P	x,y,z point
[in]	*V	View point

Returns

void

Definition at line 265 of file cordic.c.

Referenced by wire_draw().

MEMSPACE void scale_point	(	point *	P,
		double	scale
	)

Scale x,y,z by scale factor.

Parameters

[in]	*P	x,y,z point
[in]	scale	scale factor

Returns

void

Definition at line 239 of file cordic.c.

MEMSPACE void shift_point	(	point *	P,
		point *	shift
	)

Shift x,y,z by shift.

Parameters

[in]	*P	x,y,z point
[in]	shift	shift to apply to x,y,z

Returns

void

Definition at line 252 of file cordic.c.