(define (begin-draw number-of-points)
(cond ((= number-of-points 2) (glBegin GL_LINES))
((= number-of-points 3) (glBegin GL_TRIANGLES))
- ((= number-of-points 4) (glBegin GL_QUADS))))
+ ((= number-of-points 4) (glBegin GL_QUADS))
+ ((> number-of-points 4) (glBegin GL_POLYGON))))
(define (draw-vertexes vertexes)
(cond ((not (null? vertexes))
(else
(draw (list 0 l) (list 0 (- l)))))))
+(define (draw-circle radius)
+ (glBegin GL_POLYGON)
+ (do ((i 0 (1+ i)))
+ ((>= i 360))
+ (let ((a (degrees-to-radians i)))
+ (draw-vertex (list (* radius (cos a)) (* radius (sin a))))))
+ (glEnd))
+
(define* (draw-quad v1 v2 v3 v4 #:key texture color (texture-coord '((0 0) (1 1))))
(cond (texture
(progn-textures
#:texture-coord texture-coord
#:color color)))
-(define* (draw-square #:key (size 1) texture color)
+(define* (draw-square size #:key texture color)
(draw-rectangle size size #:texture texture #:color color))
(define* (draw-cube #:key (size 1)
(glNormal3f -1 0 0)
(draw-quad (list -size -size size) (list -size -size -size) (list -size size -size) (list -size size size) #:texture (or texture-6 texture) #:color (or color-6 color)))))
-(define* (translate x y #:optional (z 0))
+(define* (gtranslate x y #:optional (z 0))
(glTranslatef x y z))
-(define (rotate . rot)
+(define (grotate . rot)
(cond ((3d-mode?)
(apply 3d-rotate rot))
(else
((not (= (ftglGetFontFaceSize font) (font-size font)))
(ftglSetFontFaceSize font (font-size font) 72)))
(ftglRenderFont font text FTGL_RENDER_ALL))
+
+
+;;; 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) (format port " ~a" x))
+ (mesh-properties record))
+ (display ">" port))))
+
+(define mesh? (record-predicate mesh-type))
+
+(define* (make-mesh type proc)
+ (apply
+ (record-constructor mesh-type)
+ (let ((px 0) (py 0) (pz 0)
+ (ax 0) (ay 0) (az 0)
+ (rx 0) (ry 0) (rz 0)
+ (properties '()))
+ (let ((inner-properties
+ (lambda ()
+ `((type . ,type) (x . ,px) (y . ,py) (z . ,pz) (ax . ,ax) (ay . ,ay) (az . ,az) (rx . ,rx) (ry . ,ry) (rz . ,rz)))))
+ (list
+ (lambda ()
+ "draw"
+ (glmatrix-block
+ (grotate ax ay az)
+ (gtranslate px py pz)
+ (grotate 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* (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)
+
+
+;;; Advanced meshes
+
+(define (mesh-join . meshes)
+ (make-mesh
+ 'joined-meshes
+ (lambda (props)
+ (for-each (lambda (m) (glmatrix-block (mesh-draw m))) meshes))))
+
+
+;;; Primitives
+
+(define-macro (primitive header . body)
+ (let* ((type (car header))
+ (args (cdr header))
+ (list-args (names-arguments args)))
+ `(lambda* ,args
+ (let ((m (make-mesh
+ ',type
+ (lambda (props)
+ (apply (lambda* ,(cons #:key list-args) ,@body)
+ (list
+ ,@(let get-params ((l list-args))
+ (cond ((null? l) '())
+ (else
+ (cons (symbol->keyword (car l))
+ (cons `(assoc-ref props ',(car l))
+ (get-params (cdr l)))))))))))))
+ (mesh-properties-set! m (list ,@(map (lambda (a) `(cons ',a ,a)) list-args)))
+ m))))
+
+(define-macro (define-primitive header . body)
+ `(define ,(car header) (primitive ,header ,@body)))
+
+
+;;; Primitives definition
+
+(define-primitive (square size #:key texture color)
+ (draw-square size #:texture texture #:color color))
+
+(define-primitive (rectangle width height #:key texture color texture-coord)
+ (draw-rectangle width height #:texture texture #:color color #:texture-coord texture-coord))
+
+(define-primitive (circle radius)
+ (draw-circle radius))
+
+(define-primitive (picture filename #:key (min-filter GL_LINEAR) (mag-filter GL_LINEAR) (zoom 1) (sprite '((0 0) (1 1))))
+ (draw-texture (load-texture filename #:min-filter min-filter #:mag-filter mag-filter) #:zoom zoom #:sprite sprite))
+
+
+(module-map (lambda (sym var)
+ (if (not (eq? sym '%module-public-interface))
+ (module-export! (current-module) (list sym))))
+ (current-module))
projects / gacela.git / blobdiff