path:
root/
src/
controller/
callbacks/
reshape.c (
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blob: 99557b7eb2603ff69d363821fc830fa24f53ba2b
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#include "../../model/geometry/datarose_geometry.h"
#include "../../model/geometry/density_legend_geometry.h"
#include "../../view/state0.h"
#include "../actions/set_ortho.h"
#include "reshape.h"
#include <GL/glut.h>
#include <math.h>
#include <stdio.h>
#define S state0
void
reshape (int w, int h)
{
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
/*
* Scale the zoom region to the aspect ratio of the window.
*/
if (S.zoom.active)
{
if (w >= h)
{
double scale
=
(((S.zoom.coords[1] -
S.zoom.coords[0]) * ((double) w / (double) h)) -
(S.zoom.coords[1] - S.zoom.coords[0])) * 0.5;
S.ortho.min_x = S.zoom.coords[0] - scale;
S.ortho.max_x = S.zoom.coords[1] + scale;
S.ortho.min_y = S.zoom.coords[2];
S.ortho.max_y = S.zoom.coords[3];
}
else
{
double scale
=
(((S.zoom.coords[3] -
S.zoom.coords[2]) * ((double) h / (double) w)) -
(S.zoom.coords[3] - S.zoom.coords[2])) * 0.5;
S.ortho.min_x = S.zoom.coords[0];
S.ortho.max_x = S.zoom.coords[1];
S.ortho.min_y = S.zoom.coords[2] - scale;
S.ortho.max_y = S.zoom.coords[3] + scale;
}
}
else
{
/*
* This scaling produces an odd effect when the coordinates are
* not centered at 0,0. When 0,0 is the lower left rather than
* the center this reshape is a bit unnatural since the image is
* not centered in the middle of the window. Try chaning this
* to use the method used above for the zoom region scaling.
*/
if (w <= h)
{
S.ortho.min_x = S.ortho_min;
S.ortho.max_x = S.ortho_max;
S.ortho.min_y = S.ortho_min * (double) h / (double) w;
S.ortho.max_y = S.ortho_max * (double) h / (double) w;
}
else
{
S.ortho.min_x = S.ortho_min * (double) w / (double) h;
S.ortho.max_x = S.ortho_max * (double) w / (double) h;
S.ortho.min_y = S.ortho_min;
S.ortho.max_y = S.ortho_max;
}
}
set_ortho ();
glMatrixMode (GL_MODELVIEW);
// Set the viewport equal to the size of the window.
glViewport (0, 0, (GLsizei) w, (GLsizei) h);
density_legend_geometry ();
datarose_geometry ();
return;
}
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