Implemented zooming.

2 files changed, 37 insertions, 0 deletions

diff --git a/src/controller/set_ortho.c b/src/controller/set_ortho.c
new file mode 100644
index 0000000..75af6a6
--- a/dev/null
+++ b/src/controller/set_ortho.c
@@ -0,0 +1,26 @@
+#include "set_ortho.h"
+#include "../view/exp004state0.h"
+#include <GL/glut.h>
+
+#define S exp004state0
+
+void
+set_ortho (void)
+{
+  if (S.zoom.active)
+    {
+      gluOrtho2D (S.zoom.coords[0],
+                  S.zoom.coords[1],
+                  S.zoom.coords[2],
+                  S.zoom.coords[3]);
+    }
+  else
+    {
+      gluOrtho2D (S.ortho.min_x,
+                  S.ortho.max_x,
+                  S.ortho.min_y,
+                  S.ortho.max_y);
+    }      
+
+  return;
+}
diff --git a/src/controller/set_ortho.h b/src/controller/set_ortho.h
new file mode 100644
index 0000000..4e95330
--- a/dev/null
+++ b/src/controller/set_ortho.h
@@ -0,0 +1,11 @@
+#ifndef SET_ORTHO_H
+#define SET_ORTHO_H
+
+/*
+ * The same orthographic project should be used when in selection or
+ * rendering mode.  This function breaks the logic into a single
+ * location so that it can be call from code for either mode.
+ */
+void set_ortho (void);
+
+#endif // SET_ORTHO_H