36 files changed, 332 insertions, 176 deletions

diff --git a/src/controller/callbacks/reshape.c b/src/controller/callbacks/reshape.c
new file mode 100644
index 0000000..da2e2bf
--- a/dev/null
+++ b/src/controller/callbacks/reshape.c
@@ -0,0 +1,50 @@
+#include "../../model/geometry/density_legend_geometry.h"
+#include "../../view/exp004state0.h"
+#include "../actions/set_ortho.h"
+#include "reshape.h"
+#include <GL/glut.h>
+
+#define S exp004state0
+
+void
+reshape (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 * (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);
+
+  S.viewport.w = w;
+  S.viewport.h = h;
+
+  density_legend_geometry ();
+
+  return;
+}