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/***************************************************************
LanceMan's quickplot --- a fast interactive 2D plotter
Copyright (C) 1998, 1999 Lance Arsenault
This program 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; version 2
of the License.
This program 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Or look at http://www.gnu.org/copyleft/gpl.html .
**********************************************************************/
/* $Id: scale_plot.c,v 1.4 1999/01/15 02:19:14 lance Exp $ */
#include <stdio.h>
#include <string.h>
#include "data.h"
#include "xwin.h"
/* setup in Plot struct plot parts listed below
double **scale;
double **shift;
struct Data ***start;
struct Data ***end;
int zoom_count;
int num_zoom;
double **z_scale;
double **z_shift;
*/
int get_window_size(Display *display, Window window,
unsigned int *width,
unsigned int *height)
{
Window root_return;
int x_return, y_return;
unsigned int border_width_return;
unsigned int depth_return;
static unsigned int w = 0, h = 0;
XGetGeometry(display, window,
&root_return, &x_return, &y_return,
width, height, &border_width_return,
&depth_return);
if(w != *width || h != *height)
{
w = *width;
h = *height;
return 1;
}
return 0;
}
void scale_plot(PlotXwins *win, Plot *plot, unsigned int *w, unsigned int *h)
{
unsigned int height,width;
static unsigned int oldheight = 0, oldwidth = 0;
int i,j;
double max[2], min[2];
get_window_size(win->display,win->plotwin,&width,&height);
*w = width; *h = height;
if(width == oldwidth && height == oldheight)/* no size change so no scaling needed */
return;
if(SAME_SCALE & plot->flag)
{
max[X] = plot->max[plot->list[0][X]];
max[Y] = plot->max[plot->list[0][Y]];
min[X] = plot->min[plot->list[0][X]];
min[Y] = plot->min[plot->list[0][Y]];
for(i=1;i<plot->num_plots;i++)
{
for(j=0;j<2;j++) /* X = 0, Y = 1 in data.h */
{
if(max[j] < plot->max[plot->list[i][j]])
max[j] = plot->max[plot->list[i][j]];
if(min[j] > plot->min[plot->list[i][j]])
min[j] = plot->min[plot->list[i][j]];
}
}
}
for(i=0;i<plot->num_plots;i++)
{
if(SAME_SCALE & plot->flag)
{
if(max[X] == min[X])
max[X] = min[X] + 1.0;
if(max[Y] == min[Y])
max[Y] = min[Y] + 1.0;
plot->scale[i][X] = width/(max[X] - min[X]);
plot->scale[i][Y] = height/(min[Y] - max[Y]);
plot->shift[i][X] = -plot->scale[i][X]*min[X];
plot->shift[i][Y] = -plot->scale[i][Y]*max[Y];
}
else
{
if(plot->max[plot->list[i][X]] == plot->min[plot->list[i][X]])
{
plot->scale[i][X] = width/(
(plot->max[plot->list[i][X]] +(i+1)) - (plot->min[plot->list[i][X]]-(plot->num_plots-i))
);
plot->shift[i][X] = -plot->scale[i][X]*(plot->min[plot->list[i][X]]-(plot->num_plots-i));
}
else
{
plot->scale[i][X] = width/(
plot->max[plot->list[i][X]] - plot->min[plot->list[i][X]]
);
plot->shift[i][X] = -plot->scale[i][X]*plot->min[plot->list[i][X]];
}
if(plot->min[plot->list[i][Y]] == plot->max[plot->list[i][Y]])
{
plot->scale[i][Y] = height/(
(plot->min[plot->list[i][Y]] -(plot->num_plots-i)) - (plot->max[plot->list[i][Y]]+(i+1))
);
plot->shift[i][Y] = -plot->scale[i][Y]*(plot->max[plot->list[i][Y]]+(i+1));
}
else
{
plot->scale[i][Y] = height/(
plot->min[plot->list[i][Y]] - plot->max[plot->list[i][Y]]
);
plot->shift[i][Y] = -plot->scale[i][Y]*plot->max[plot->list[i][Y]];
}
}
}
plot->z_scale[0][X] = FRACTION_WINDOW_USE;
plot->z_scale[0][Y] = FRACTION_WINDOW_USE;
plot->z_shift[0][X] = (1.0 - FRACTION_WINDOW_USE)*width/2.0;
plot->z_shift[0][Y] = (1.0 - FRACTION_WINDOW_USE)*height/2.0;
if(oldwidth != 0 && oldheight != 0)
{
double fh,fw;
fh = 1.0/oldheight; fh *= height;
fw = 1.0/oldwidth; fw *= width;
for(i=1;i<=plot->zoom_count;i++)
{
plot->z_shift[i][X] *= fw;
plot->z_shift[i][Y] *= fh;
}
}
oldwidth = width;
oldheight = height;
}
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