ang

 

	int no_samples;

 

	for(no_samples=MIN_AVAIL();no_samples >0; --no_samples) {
		IT_IN(0);
		IT_IN(1);
		if(IT_OUT(0)) {
			KrnOverflow("ang",0);
			return(99);
		} 
		if(y(0) == 0.0 && x(0) == 0.0)
		{
			z(0) == halfpi/2.0;
		}
		else
				
		if(y(0) == 0.0) 
			if(x(0) > 0.0)
				z(0)=halfpi;
			else
				z(0)=3.0*halfpi;
		else
		if(x(0) >= 0.0 && y(0) < 0.0)
		{
			z(0)=2.0*halfpi + atan(x(0)/y(0));
		}
		if(x(0) <= 0.0 && y(0) > 0.0)
		{
			z(0)=4.0*halfpi + atan(x(0)/y(0));
		}
		if(x(0) > 0.0 && y(0) > 0.0)
		{
			z(0)=atan(x(0)/y(0));
		}
		if(x(0) < 0.0 && y(0) < 0.0)
		{
			z(0)=2.0*halfpi + atan(x(0)/y(0));
		}
	}

/*  Capsim (r) Text Mode Kernel (TMK) Star Library (Blocks)
    Copyright (C) 1989-2017  Silicon DSP Corporation

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    http://www.silicondsp.com
    Silicon DSP  Corporation
    Las Vegas, Nevada
*/

 

/*
	ang.s:		angle

ang


This star finds the inverse tangent of x/y
	inputs:		x, numerator
			y, denominator
	outputs:	z, atan(x/y)
	parameters:	none



*/