X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=src%2Fvideo.scm;h=e183f13330f05713125651b2063ea9ff83fabf39;hb=995c7af364cfdc254e904a3b560e068339613534;hp=c30f3332e9f475266f173d18c2fa1097aa38fc15;hpb=bbfc49f49dedf5020c25426f276537fe0aa46771;p=gacela.git

diff --git a/src/video.scm b/src/video.scm
index c30f333..e183f13 100644
--- a/src/video.scm
+++ b/src/video.scm
@@ -60,7 +60,11 @@
 	    set-camera
 	    camera-look
 	    load-font
-	    render-text))
+	    render-text)
+  #:export-syntax (glmatrix-block)
+  #:re-export (glPushMatrix
+	       glPopMatrix))
+
 
 
 ;;; Screen
@@ -362,6 +366,13 @@
   (glLoadIdentity)
   (cond ((3d-mode?) (camera-look))))
 
+(define-macro (glmatrix-block . code)
+  `(let ((result #f))
+     (glPushMatrix)
+     (set! result (begin ,@code))
+     (glPopMatrix)
+     result))
+
 
 ;;; Lights