1 files changed, 21 insertions, 0 deletions
diff --git a/sdl/glframe.h b/sdl/glframe.h
new file mode 100644
index 0000000..fa5c991
--- /dev/null
+++ b/sdl/glframe.h
@@ -0,0 +1,21 @@
+#ifndef _GLFRAME_H_
+#define _GLFRAME_H_
+
+#include "math3d.h"
+
+typedef struct
+{
+    M3DVector3f v_location; /* location */
+    M3DVector3f v_forward;  /* where am I heading */
+    M3DVector3f v_up;       /* which way is up */   
+} GLFrame;
+
+/* function prototypes */
+void reset_glframe(GLFrame *frame);
+void get_camera_orientation(GLFrame *frame, M3DMatrix44f m);
+void apply_camera_transform(GLFrame *frame);
+void move_forward(GLFrame *frame, float delta);
+void rotate_local_y(GLFrame *frame, float angle);
+
+#endif
+