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/* Copyright (C) 2000 Damir Zucic */
/*=============================================================================
init_nearest.c
Purpose:
Initialize last_refreshI and styleI for each NearestAtomS structure.
For a given pixel, the NearestAtomS structure stores information
about the last atom drawn in that pixel. If the current refreshI in
the event loop is larger than last_refreshI for a given pixel, the
pixel is free for drawing. If these two values are equal, the z
coordinate associated with a given pixel should be compared with the
z coordinate of the current atom. This function must be called if:
(1) The main window is resized.
(2) A new macromolecular complex is loaded.
(3) A previously loaded complex is discarded.
(4) Atoms are deleted or inserted.
(5) Visibility status of at least one atom is changed.
(6) The refreshI in EventLoop_ function is reset.
Input:
(1) Pointer to an array of NearestAtomS structures.
(2) Number of array elements (the maximal number of pixels).
Output:
(1) The last_refreshI in each NearestAtomS structure initialized.
(2) The styleI in each NearestAtomS structure initialized.
Return value:
No return value.
Notes:
(1) The initial last_refreshI index value to zero. The lowest value
of the refreshI in event_loop.c is one. All pixel which have the
last_refreshI equal to zero are thus free for drawing - there is
no need to compare the z coord. of the current atom (bond) with
the z value associated with a given pixel.
(2) The initial styleI index value is zero.
(3) By the way, as calloc is used to reallocate the memory, this
function is unnecessary.
========includes:============================================================*/
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <X11/Xatom.h>
#include "defines.h"
#include "typedefs.h"
/*======initialize the array of NearestAtomS structures:=====================*/
void InitNearest_ (NearestAtomS *nearest_atomSP, size_t max_pixelsN)
{
size_t i = 0;
NearestAtomS *curr_pixelSP;
for (i = 0; i < max_pixelsN; i++)
{
curr_pixelSP = nearest_atomSP + i;
curr_pixelSP->last_refreshI = 0;
curr_pixelSP->styleI = 0;
}
}
/*===========================================================================*/
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