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/* Copyright (C) 2000-2002 Damir Zucic */
/*=============================================================================
bond_style3_quad4.c
Purpose:
Draw bond which fits into quadrant 4 using style 3. See the file
file bonds_style3.c for description of quadrants.
Input:
(1) Pointer to Aux1S structure, which contains required data.
(2) Bond index.
Output:
(1) A single bond drawn.
(2) Return value.
Return value:
(1) One if at least one pixel is drawn.
(2) Zero otherwise.
=============================================================================*/
#include <stdio.h>
#include <math.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <X11/Xatom.h>
#include "defines.h"
#include "typedefs.h"
/*======draw bond in quadrant 4 using style 3:===============================*/
int BondStyle3Quadrant4_ (Aux1S *aux1SP, int bondI)
{
long pixels_drawnN = 0;
double recip_denom, y_to_x_scale, y_to_z_scale;
int screen_x, line_screen_x, screen_y, screen_y1, delta_y;
double d, atomic_z;
int lineI;
size_t pixelI;
NearestAtomS *curr_pixelSP;
/* Scale factor required to calculate screen_x from screen_y: */
if (aux1SP->screen_delta_y != 0)
recip_denom = 1.0 / (double) aux1SP->screen_delta_y;
else recip_denom = 0.0;
y_to_x_scale = (double) aux1SP->screen_delta_x * recip_denom;
/* Scale factor required to calculate z (in atomic units) from screen_y: */
y_to_z_scale = aux1SP->atomic_delta_z * recip_denom;
/* Vertical scan (bottom to top): */
screen_y1 = (aux1SP->screen_y0 + aux1SP->screen_y1) / 2;
for (screen_y = aux1SP->screen_y0; screen_y >= screen_y1; screen_y--)
{
/* Check is this pixel inside the area reserved for the */
/* current image (there are two images in stereo mode): */
if (screen_y < aux1SP->configSP->image_screen_y0) continue;
if (screen_y > aux1SP->configSP->image_screen_y1) continue;
/* Relative position: */
delta_y = screen_y - aux1SP->screen_y0;
/* Find the corresponding screen_x: */
d = (double) aux1SP->screen_x0 + y_to_x_scale * (double) delta_y;
screen_x = (int) (d + 0.5);
/* z value (in atomic units): */
atomic_z = aux1SP->atomic_z0 + y_to_z_scale * (double) delta_y;
/* Loop which draws five lines (horizontal scan): */
for (lineI = 0; lineI <= 4; lineI++)
{
/* Pixel position: */
line_screen_x = screen_x +lineI - 2;
/* Check is this pixel inside the area reserved for the */
/* current image (there are two images in stereo mode): */
if (line_screen_x <
aux1SP->configSP->image_screen_x0[aux1SP->imageI])
{
continue;
}
if (line_screen_x >
aux1SP->configSP->image_screen_x1[aux1SP->imageI])
{
continue;
}
/* Current pixel index: */
pixelI = aux1SP->guiSP->main_win_free_area_width * screen_y +
line_screen_x;
/* Check pixel index: */
if (pixelI >= aux1SP->pixelsN) break;
/* Pointer to NearestAtomS struct. */
/* assigned to current coordinates: */
curr_pixelSP = aux1SP->nearest_atomSP + pixelI;
/* Check was this pixel used already in */
/* this drawing step; if it was, compare */
/* the z value of the current atom with z */
/* value previously stored to this pixel: */
if (aux1SP->refreshI == curr_pixelSP->last_refreshI)
{
if (atomic_z >= curr_pixelSP->z) continue;
}
/* If this point is reached draw pixel: */
XDrawPoint (aux1SP->guiSP->displaySP,
aux1SP->guiSP->main_hidden_pixmapID,
aux1SP->guiSP->theGCA[lineI],
line_screen_x, screen_y);
/* Refresh the content of NearestAtomS */
/* array associated with this pixel: */
curr_pixelSP->styleI = 3;
curr_pixelSP->last_refreshI = aux1SP->refreshI;
curr_pixelSP->mol_complexI = aux1SP->mol_complexI;
curr_pixelSP->atomI = aux1SP->atomI;
curr_pixelSP->bondI = bondI;
curr_pixelSP->z = atomic_z;
curr_pixelSP->colorID = aux1SP->colorIDA[lineI];
/* Update the number of pixels drawn: */
pixels_drawnN++;
}
}
/* Rounding the bottom end: */
do
{
/* The y coordinate: */
screen_y = aux1SP->screen_y0 + 1;
/* Check: */
if (screen_y < aux1SP->configSP->image_screen_y0) break;
if (screen_y > aux1SP->configSP->image_screen_y1) break;
/* z value (in atomic units): */
atomic_z = aux1SP->atomic_z0;
/* The x coordinate of central pixel: */
screen_x = aux1SP->screen_x0;
/* Scan three lines: */
for (lineI = 0; lineI <= 2; lineI++)
{
/* Pixel position: */
line_screen_x = screen_x +lineI - 1;
/* Check: */
if (line_screen_x <
aux1SP->configSP->image_screen_x0[aux1SP->imageI])
{
continue;
}
if (line_screen_x >
aux1SP->configSP->image_screen_x1[aux1SP->imageI])
{
continue;
}
/* Current pixel index: */
pixelI = aux1SP->guiSP->main_win_free_area_width * screen_y +
line_screen_x;
/* Check pixel index: */
if (pixelI >= aux1SP->pixelsN) break;
/* Pointer to NearestAtomS struct. */
/* assigned to current coordinates: */
curr_pixelSP = aux1SP->nearest_atomSP + pixelI;
/* Check was this pixel used already in this drawing step : */
if (aux1SP->refreshI == curr_pixelSP->last_refreshI)
{
if (atomic_z >= curr_pixelSP->z) continue;
}
/* If this point is reached draw one pixel: */
XDrawPoint (aux1SP->guiSP->displaySP,
aux1SP->guiSP->main_hidden_pixmapID,
aux1SP->guiSP->theGCA[lineI + 1],
line_screen_x, screen_y);
/* Refresh the content of NearestAtomS */
/* array associated with this pixel: */
curr_pixelSP->styleI = 3;
curr_pixelSP->last_refreshI = aux1SP->refreshI;
curr_pixelSP->mol_complexI = aux1SP->mol_complexI;
curr_pixelSP->atomI = aux1SP->atomI;
curr_pixelSP->bondI = bondI;
curr_pixelSP->z = atomic_z;
curr_pixelSP->colorID = aux1SP->colorIDA[lineI + 1];
/* Update the number of pixels drawn: */
pixels_drawnN++;
}
/* End of single pass loop: */
} while (0);
/* Rounding the top end: */
do
{
/* The y coordinate: */
screen_y = screen_y1 - 1;
/* Check: */
if (screen_y < aux1SP->configSP->image_screen_y0) break;
if (screen_y > aux1SP->configSP->image_screen_y1) break;
/* Relative position: */
delta_y = screen_y1 - aux1SP->screen_y0;
/* z value (in atomic units): */
atomic_z = aux1SP->atomic_z0 + y_to_z_scale * (double) delta_y;
/* The x coordinate of central pixel: */
d = (double) aux1SP->screen_x0 + y_to_x_scale * (double) delta_y;
screen_x = (int) (d + 0.5);
/* Scan three lines: */
for (lineI = 0; lineI <= 2; lineI++)
{
/* Pixel position: */
line_screen_x = screen_x +lineI - 1;
/* Check: */
if (line_screen_x <
aux1SP->configSP->image_screen_x0[aux1SP->imageI])
{
continue;
}
if (line_screen_x >
aux1SP->configSP->image_screen_x1[aux1SP->imageI])
{
continue;
}
/* Current pixel index: */
pixelI = aux1SP->guiSP->main_win_free_area_width * screen_y +
line_screen_x;
/* Check pixel index: */
if (pixelI >= aux1SP->pixelsN) break;
/* Pointer to NearestAtomS struct. */
/* assigned to current coordinates: */
curr_pixelSP = aux1SP->nearest_atomSP + pixelI;
/* Check was this pixel used already in this drawing step : */
if (aux1SP->refreshI == curr_pixelSP->last_refreshI)
{
if (atomic_z >= curr_pixelSP->z) continue;
}
/* If this point is reached draw one pixel: */
XDrawPoint (aux1SP->guiSP->displaySP,
aux1SP->guiSP->main_hidden_pixmapID,
aux1SP->guiSP->theGCA[lineI + 1],
line_screen_x, screen_y);
/* Refresh the content of NearestAtomS */
/* array associated with this pixel: */
curr_pixelSP->styleI = 3;
curr_pixelSP->last_refreshI = aux1SP->refreshI;
curr_pixelSP->mol_complexI = aux1SP->mol_complexI;
curr_pixelSP->atomI = aux1SP->atomI;
curr_pixelSP->bondI = bondI;
curr_pixelSP->z = atomic_z;
curr_pixelSP->colorID = aux1SP->colorIDA[lineI + 1];
/* Update the number of pixels drawn: */
pixels_drawnN++;
}
/* End of single pass loop: */
} while (0);
/* Check is at least one pixel drawn: */
if (pixels_drawnN > 0) return 1;
/* If this point is reached, nothing is drawn: */
return 0;
}
/*===========================================================================*/
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