(no commit message)

[gacela.git] / gacela_draw.lisp

diff --git a/gacela_draw.lisp b/gacela_draw.lisp
index dae68d4f8fced5924fb1f038327bd4d6d293158e..a23c735d98947e58c1a6660030708adf420a7959 100644 (file)
--- a/gacela_draw.lisp
+++ b/gacela_draw.lisp
@@ -14,7 +14,11 @@
 ;;; You should have received a copy of the GNU General Public License
 ;;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-(in-package :gacela)
+
+(eval-when (compile load eval)
+          (when (not (find-package 'gacela)) (make-package 'gacela :nicknames '(gg) :use '(lisp)))
+          (in-package 'gacela :nicknames '(gg) :use '(lisp)))
+
 
 (defmacro with-color (color &body code)
   (cond (color
@@ -168,4 +172,14 @@
   (glRotatef rot 0 0 1))
 
 (defun to-origin ()
-  (glLoadIdentity))
+  (glLoadIdentity)
+  (cond ((3d-mode?) (camera-look))))
+
+(let ((camera-eye '(0 0 0)) (camera-center '(0 0 -100)) (camera-up '(0 1 0)))
+  (defun set-camera (&key eye center up)
+    (cond (eye (setq camera-eye eye)))
+    (cond (center (setq camera-center center)))
+    (cond (up (setq camera-up up))))
+
+  (defun camera-look ()
+    (apply #'gluLookAt (concatenate 'list camera-eye camera-center camera-up))))