;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
-(define-module (gacela draw)
+(define-module (gacela views)
#:use-module (gacela gacela)
#:use-module ((gacela video) #:renamer (symbol-prefix-proc 'video:))
#:use-module ((gacela gl) #:select (glPushMatrix glPopMatrix))
#:use-module (ice-9 optargs))
-(define-macro (define-view name content)
- `(begin
- (hash-set! active-views ',name (lambda () (video:glmatrix-block ,content)))
- ',name))
-(define (square . params)
- (define-view tmp (apply video:draw-square params)))
+;;; Views
+
+(define view-type
+ (make-record-type "view"
+ '(id controllers meshes)
+ (lambda (record port)
+ (format port "#<view: ~a controllers / ~a meshes>"
+ (length (hash-map->list (lambda x x) (view-controllers record)))
+ (length (hash-map->list (lambda x x) (view-meshes record)))))))
+
+(define view? (record-predicate view-type))
+(define view-id (record-accessor view-type 'id))
+(define view-controllers (record-accessor view-type 'controllers))
+(define view-meshes (record-accessor view-type 'meshes))
+(define (make-view) ((record-constructor view-type) (gensym) (make-hash-table) (make-hash-table)))
+
+
+(define active-views (make-hash-table))
+
+(define default-view (make-hash-table))
+
+(define* (draw-meshes #:optional (meshes (hash-map->list (lambda (k v) v) default-view)))
+ (cond ((not (null? meshes))
+ (catch #t
+ (lambda () (mesh-draw (car meshes)))
+ (lambda (key . args) #f))
+ (draw-meshes (cdr meshes)))))
+
+
+;;; Meshes
+
+(define mesh-type
+ (make-record-type "mesh"
+ '(draw translate turn rotate inner-properties inner-property properties properties-set! property property-set!)
+ (lambda (record port)
+ (format port "#<mesh: ~a" (mesh-inner-property record 'type))
+ (for-each (lambda (x)
+ (cond (((@ (gacela utils) bound?) (cdr x))
+ (format port " ~a" x))))
+ (mesh-properties record))
+ (display ">" port))))
+
+
+(define mesh? (record-predicate mesh-type))
+
+(define* (make-mesh proc #:optional mesh-type)
+ (apply
+ (record-constructor mesh-type)
+ (let ((px 0) (py 0) (pz 0)
+ (ax 0) (ay 0) (az 0)
+ (rx 0) (ry 0) (rz 0)
+ (id (gensym)) (type mesh-type)
+ (properties '()))
+ (let ((inner-properties
+ (lambda ()
+ `((id . ,id) (type . ,type) (x . ,px) (y . ,py) (z . ,pz) (ax . ,ax) (ay . ,ay) (az . ,az) (rx . ,rx) (ry . ,ry) (rz . ,rz)))))
+ (list
+ (lambda ()
+ "draw"
+ (video:glmatrix-block
+ (video:rotate ax ay az)
+ (video:translate px py pz)
+ (video:rotate rx ry rz)
+ (proc properties)))
+ (lambda (x y z)
+ "translate"
+ (set! px (+ px x))
+ (set! py (+ py y))
+ (set! pz (+ pz z)))
+ (lambda (x y z)
+ "turn"
+ (set! ax (+ ax x))
+ (set! ay (+ ay y))
+ (set! az (+ az z)))
+ (lambda (x y z)
+ "rotate"
+ (set! rx (+ rx x))
+ (set! ry (+ ry y))
+ (set! rz (+ rz z)))
+ (lambda ()
+ "inner-properties"
+ (inner-properties))
+ (lambda (prop-name)
+ "inner-property"
+ (assoc-ref (inner-properties) prop-name))
+ (lambda ()
+ "properties"
+ properties)
+ (lambda (new-properties)
+ "properties-set!"
+ (set! properties new-properties))
+ (lambda (prop-name)
+ "property"
+ (assoc-ref properties prop-name))
+ (lambda (prop-name value)
+ "property-set!"
+ (set! properties (assoc-set! properties prop-name value))))))))
+
+(define (mesh-draw mesh)
+ (((record-accessor mesh-type 'draw) mesh)))
+
+(define (mesh-inner-properties mesh)
+ (((record-accessor mesh-type 'inner-properties) mesh)))
+
+(define (mesh-inner-property mesh prop-name)
+ (((record-accessor mesh-type 'inner-property) mesh) prop-name))
+
+(define (mesh-properties mesh)
+ (((record-accessor mesh-type 'properties) mesh)))
+
+(define (mesh-properties-set! mesh new-properties)
+ (((record-accessor mesh-type 'properties-set!) mesh) new-properties))
+
+(define (mesh-property mesh prop-name)
+ (((record-accessor mesh-type 'property) mesh) prop-name))
+
+(define (mesh-property-set! mesh prop-name value)
+ (((record-accessor mesh-type 'property-set!) mesh) prop-name value))
+
+(define* (show mesh #:optional (view default-view))
+ (let ((id (mesh-inner-property mesh 'id)))
+ (if (not (hash-ref view id))
+ (hash-set! view id mesh))))
+
+(define* (hide mesh #:optional (view default-view))
+ (hash-remove! view (mesh-inner-property mesh 'id)))
+
+(define* (translate mesh x y #:optional (z 0))
+ (((record-accessor mesh-type 'translate) mesh) x y z)
+ mesh)
+
+(define (turn mesh . params)
+ (apply ((record-accessor mesh-type 'turn) mesh)
+ (if (>= (length params) 3)
+ params
+ (list 0 0 (car params))))
+ mesh)
+
+(define (rotate mesh . params)
+ (apply ((record-accessor mesh-type 'rotate) mesh)
+ (if (>= (length params) 3)
+ params
+ (list 0 0 (car params))))
+ mesh)
+
+
+;;; Primitives
+
+(defmacro* define-primitive (proc #:optional type)
+ `(lambda (. params)
+ (let ((m (make-mesh (lambda (props) (apply ,proc ((@ (gacela utils) arguments-apply) ,proc props))) ,type)))
+ (mesh-properties-set! m ((@ (gacela utils) arguments-calling) ,proc params))
+ m)))
+
+(define-macro (define-primitives . symbols)
+ (cond ((null? symbols)
+ `#t)
+ (else
+ (let ((origin (caar symbols))
+ (dest (cadar symbols)))
+ `(begin
+ (define ,origin (define-primitive ,dest ',origin))
+ (define-primitives ,@(cdr symbols)))))))
+
+(define-primitives
+ (rectangle video:draw-rectangle)
+ (square video:draw-square))
+
(module-map (lambda (sym var)
(if (not (eq? sym '%module-public-interface))
(module-export! (current-module) (list sym))))
(current-module))
+
+
+;;; Adding extensions to the main loop
+(add-extension! draw-meshes 50)
projects / gacela.git / blobdiff