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/* Copyright (C) 2000 Damir Zucic */
/*=============================================================================
radius.c
Purpose:
Execute radius command: define the radius of the sphere around
the geometric center calculated for the current selection. This
radius may be used to select all atoms which are inside this
sphere. Default (hard-coded) value is 8.0 angstroms.
Input:
(1) Pointer to RuntimeS structure.
(2) Pointer to the remainder of the command string.
Output:
(1) The sphere radius set.
(2) Return value.
Return value:
(1) Positive (command) code on success.
(2) Negative (error) code on failure.
========includes:============================================================*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <X11/Xatom.h>
#include "defines.h"
#include "commands.h"
#include "typedefs.h"
/*======execute radius command:==============================================*/
int Radius_ (RuntimeS *runtimeSP, char *stringP)
{
char *P;
int n;
double value;
/* Replace each non-numeric character (except */
/* minus sign and decimal point) with space: */
P = stringP;
while ((n = *P++) != '\0')
{
if (!isdigit (n) && (n != '-') && (n != '.')) *(P - 1) = ' ';
}
/* Try to extract the radius: */
if (sscanf (stringP, "%lf", &value) != 1)
{
strcpy (runtimeSP->messageA, "Failed to extract the sphere radius!");
runtimeSP->message_length = strlen (runtimeSP->messageA);
return ERROR_RADIUS;
}
/* Check the radius (must be positive): */
if (value < 0.0)
{
strcpy (runtimeSP->messageA, "Positive value expected!");
runtimeSP->message_length = strlen (runtimeSP->messageA);
return ERROR_RADIUS;
}
/* On success, copy the extracted radius to RuntimeS structure: */
runtimeSP->sphere_radius = value;
/* Return the command code: */
return COMMAND_RADIUS;
}
/*===========================================================================*/
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