36 files changed, 332 insertions, 176 deletions

diff --git a/src/controller/actions/process_hits.c b/src/controller/actions/process_hits.c
new file mode 100644
index 0000000..4a76d1c
--- a/dev/null
+++ b/src/controller/actions/process_hits.c
@@ -0,0 +1,45 @@
+#define GL_GLEXT_PROTOTYPES
+#include "../../view/exp004state0.h"
+#include "../../model/geometry/map_geometry.h"
+#include "process_hits.h"
+#include "sel_save.h"
+
+/*
+ * A simple alias to make the code more readable.
+ */
+#define S exp004state0
+
+/*
+ * The implementation of this function is based on
+ * [Angel,2008,pp80-81].
+ */
+void
+process_hits (const GLint hits, const GLuint * hitlist)
+{
+  for (unsigned int i = 0; i < hits; i++)
+    {
+      hitlist += 3;
+
+      /*
+       * Add the hits to the selection.
+       */
+      S.selection.set[*hitlist] = true;
+
+      hitlist++;
+    }
+
+  sel_save ();
+
+  glBindBuffer (GL_ARRAY_BUFFER, S.buffers[BASE_COLORS]);
+  glColorPointer (4, GL_FLOAT, 0, 0);
+  glBufferData (GL_ARRAY_BUFFER,
+                sizeof (S.base_colors_data), S.base_colors_data,
+                GL_STATIC_DRAW);
+
+  /*
+   * Rebuild the display list for the map.
+   */
+  map_geometry ();
+
+  return;
+}