From 7e57983e35b2504e554dd9266704ec707f62c331 Mon Sep 17 00:00:00 2001
From: Javier Sancho <jsf@jsancho.org>
Date: Fri, 13 Jul 2012 20:31:24 +0200
Subject: [PATCH] Show, hide and translate for meshes.

---
 src/gacela.scm |  2 +-
 src/views.scm  | 74 ++++++++++++++++++++------------------------------
 2 files changed, 31 insertions(+), 45 deletions(-)

diff --git a/src/gacela.scm b/src/gacela.scm
index 06986b8..70ac867 100644
--- a/src/gacela.scm
+++ b/src/gacela.scm
@@ -345,7 +345,7 @@
 (define* (draw-meshes #:optional (meshes (hash-map->list (lambda (k v) v) default-view)))
   (cond ((not (null? meshes))
 	 (catch #t
-		  (lambda () (glmatrix-block ((car meshes))))
+		  (lambda () ((car meshes) 'draw))
 		  (lambda (key . args) #f))
 	 (draw-meshes (cdr meshes)))))
 
diff --git a/src/views.scm b/src/views.scm
index d658eaf..63c162a 100644
--- a/src/views.scm
+++ b/src/views.scm
@@ -29,51 +29,39 @@
 (define (mesh primitive)
   (let ((x 0) (y 0) (z 0)
 	(ax 0) (ay 0) (az 0)
-	(rx 0) (ry 0) (rz 0))
-    (lambda (option . params)
-      (case option
-	((draw)
-	 (video:glatrix-block
-	  (video:rotate rx ry rz)
-	  (video:translate x y z)
-	  (video:rotate ax ay az)
-	  (primitive)))
-	((get-properties)
-	 `((x . ,x) (y . ,y) (z . ,z) (ax . ,ax) (ay . ,ay) (az . ,az) (rx . ,rx) (ry . ,ry) (rz . ,rz)))))))
+	(rx 0) (ry 0) (rz 0)
+	(id (gensym)))
+    (let ((get-properties
+	   (lambda ()
+	     `((id . ,id) (x . ,x) (y . ,y) (z . ,z) (ax . ,ax) (ay . ,ay) (az . ,az) (rx . ,rx) (ry . ,ry) (rz . ,rz)))))
+      (lambda (option . params)
+	(case option
+	  ((draw)
+	   (video:glmatrix-block
+	    (video:rotate rx ry rz)
+	    (video:translate x y z)
+	    (video:rotate ax ay az)
+	    (primitive)))
+	  ((translate)
+	   (set! x (+ x (car params)))
+	   (set! y (+ y (cadr params)))
+	   (set! z (+ z (caddr params))))
+	  ((get-properties)
+	   (get-properties))
+	  ((get-property)
+	   (assoc-ref (get-properties) (car params))))))))
 
-(define-macro (define-mob mob-head . body)
-  (let* ((name (car mob-head))
-	 (attr (cdr mob-head))
-	 (make-fun-symbol (gensym))
-	 (mob-fun-symbol (gensym))
-	 (params-symbol (gensym)))
-    `(define (,name . ,params-symbol)
-       (define ,make-fun-symbol
-	 (lambda* ,(if (null? attr) '() `(#:key ,@attr))
-	   (the-mob ,name (list ,@(map (lambda (a) `(cons ',(car a) ,(car a))) attr)))))
-       (define ,mob-fun-symbol
-	 (define-mob-function ,attr ,@body))
-       (cond ((or (null? ,params-symbol) (keyword? (car ,params-symbol)))
-	      (apply ,make-fun-symbol ,params-symbol))
-	     (else
-	      (apply ,mob-fun-symbol ,params-symbol))))))
+(define* (show-mesh mesh #:optional (view default-view))
+  (let ((id (mesh 'get-property 'id)))
+    (if (not (hash-ref view id))
+	(hash-set! view id mesh))))
 
+(define* (hide-mesh mesh #:optional (view default-view))
+  (hash-remove! view (mesh 'get-property 'id)))
 
-(define-macro (define-mesh name . mesh)
-  (let* ((make-fun-symbol (gensym))
-	 (mesh-fun-symbol (gensym))
-	 (params-symbol (gensym)))
-    `(define ,name
-       (let ((,make-fun-symbol
-	      (lambda ()))
-	     (,mesh-fun-symbol
-	      (lambda ())))
-	 (lambda (. ,params-symbol)
-	   (cond ((or (null? ,params-symbol) (keyword? (car ,params-symbol)))
-		  (apply ,make-fun-symbol ,params-symbol))
-		 (else
-		  (apply ,mesh-fun-symbol ,params-symbol))))))))
-	 
+(define* (translate mesh x y #:optional (z 0))
+  (mesh 'translate x y z)
+  mesh)
 
 (define-macro (define-primitives . symbols)
   (cond ((null? symbols)
@@ -83,8 +71,6 @@
 	    (define (,(caar symbols) . params) (mesh (lambda () (apply ,(cadar symbols) params))))
 	    (define-primitives ,@(cdr symbols))))))
 
-; (define-macro (,(caar symbols) . params) (let ((f ',(cadar symbols))) `(mesh (lambda () (apply ,f ',params)))))
-
 (define-primitives
   (rectangle video:draw-rectangle)
   (square video:draw-square))
-- 
2.39.5