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#include "exp004reshape.h"
#include "../view/exp004state0.h"
#include <GL/glut.h>
#include <stdio.h>
#define S exp004state0
void
exp004reshape (int w, int h)
{
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
/*
* 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.
*/
if (w <= h)
{
S.ortho.min_x =
S.ortho_min;
S.ortho.max_x =
S.ortho_max;
S.ortho.min_y =
S.ortho_min * (GLfloat) h / (GLfloat) w;
S.ortho.max_y =
S.ortho_max * (GLfloat) h / (GLfloat) w;
}
else
{
S.ortho.min_x =
S.ortho_min * (GLfloat) w / (GLfloat) h;
S.ortho.max_x =
S.ortho_max * (GLfloat) w / (GLfloat) h;
S.ortho.min_y =
S.ortho_min;
S.ortho.max_y =
S.ortho_max;
}
gluOrtho2D(S.ortho.min_x,
S.ortho.max_x,
S.ortho.min_y,
S.ortho.max_y);
printf ("Ortho: %f %f %f %f\n",
S.ortho.min_x,
S.ortho.max_x,
S.ortho.min_y,
S.ortho.max_y);
glMatrixMode (GL_MODELVIEW);
// Set the viewport equal to the size of the window.
glViewport (0, 0, (GLsizei) w, (GLsizei) h);
S.viewport.w = w;
S.viewport.h = h;
return;
}
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