#:use-module (gacela sdl)
#:use-module (gacela gl)
#:use-module (gacela ftgl)
+ #:use-module (gacela math)
+ #:use-module (gacela utils)
#:use-module (ice-9 optargs)
#:use-module (ice-9 receive)
#:export (init-video
get-screen-height
get-screen-width
get-screen-bpp
+ set-screen-bpp!
resize-screen
quit-video
clear-screen
flip-screen
+ set-screen-title!
+ get-screen-title
set-2d-mode
set-3d-mode
3d-mode?
+ get-frames-per-second
+ set-frames-per-second!
+ get-fullscreen
+ set-fullscreen!
+ init-frame-time
+ get-frame-time
+ delay-frame
get-current-color
set-current-color
with-color
progn-textures
draw
load-texture
+ load-texture-without-cache
+ get-texture-properties
draw-texture
draw-line
draw-quad
set-camera
camera-look
load-font
- render-text))
+ load-font-without-texture
+ render-text)
+ #:re-export (glPushMatrix
+ glPopMatrix)
+ #:export-syntax (glmatrix-block))
+
;;; Screen
-(define init-video #f)
-(define get-screen-height #f)
-(define get-screen-width #f)
-(define get-screen-bpp #f)
-(define resize-screen #f)
-(define quit-video #f)
-
-(let ((screen #f) (flags 0))
- (set! init-video
- (lambda* (width height bpp #:key (mode '2d) (title ""))
- (cond ((not screen)
- (SDL_Init SDL_INIT_VIDEO)
- (let ((info (SDL_GetVideoInfo)))
- (SDL_GL_SetAttribute SDL_GL_DOUBLEBUFFER 1)
- (set! flags (+ SDL_OPENGL SDL_GL_DOUBLEBUFFER SDL_HWPALETTE SDL_RESIZABLE
- (if (= (assoc-ref info 'hw_available) 0) SDL_SWSURFACE SDL_HWSURFACE)
- (if (= (assoc-ref info 'blit_hw) 0) 0 SDL_HWACCEL)))
- (set! screen (SDL_SetVideoMode width height bpp flags))
- (SDL_WM_SetCaption title "")
- (init-gl)
- (if (eq? mode '3d) (set-3d-mode) (set-2d-mode)))))))
-
- (set! get-screen-height
- (lambda ()
- (surface-h screen)))
-
- (set! get-screen-width
- (lambda ()
- (surface-w screen)))
-
- (set! get-screen-bpp
- (lambda ()
- (surface-format-BytesPerPixel screen)))
-
- (set! resize-screen
- (lambda (width height)
- (cond (screen
- (set! screen (SDL_SetVideoMode width height (get-screen-bpp) flags))
- (resize-screen-GL width height)))))
-
- (set! quit-video
- (lambda ()
- (SDL_FreeSurface screen)
- (set! screen #f)
- (SDL_Quit))))
+(define screen #f)
+(define flags 0)
+
+(define* (init-video width height bpp #:key (mode '2d) (title "") (fps 20) (fullscreen 'off))
+ (SDL_Init SDL_INIT_VIDEO)
+ (let ((info (SDL_GetVideoInfo)))
+ (SDL_GL_SetAttribute SDL_GL_DOUBLEBUFFER 1)
+ (set! flags (+ SDL_OPENGL SDL_GL_DOUBLEBUFFER SDL_HWPALETTE SDL_RESIZABLE
+ (if (= (assoc-ref info 'hw_available) 0) SDL_SWSURFACE SDL_HWSURFACE)
+ (if (= (assoc-ref info 'blit_hw) 0) 0 SDL_HWACCEL)
+ (if (eq? fullscreen 'on) SDL_FULLSCREEN 0)))
+ (set! screen (SDL_SetVideoMode width height bpp flags))
+ (set-screen-title! title)
+ (set-frames-per-second! fps)
+ (set-fullscreen! fullscreen #f)
+ (init-gl)
+ (if (eq? mode '3d) (set-3d-mode) (set-2d-mode))))
+
+(define (get-screen-height)
+ (surface-h screen))
+
+(define (get-screen-width)
+ (surface-w screen))
+
+(define (get-screen-bpp)
+ (* (surface-format-BytesPerPixel screen) 8))
+
+(define (set-screen-bpp! bpp)
+ (cond (screen
+ (set! screen (SDL_SetVideoMode (get-screen-width) (get-screen-height) (get-screen-bpp) flags)))))
+
+(define (resize-screen width height)
+ (cond (screen
+ (set! screen (SDL_SetVideoMode width height (get-screen-bpp) flags))
+ (resize-screen-GL width height))))
+
+(define (quit-video)
+ (cond (screen
+ (SDL_FreeSurface screen)
+ (set! screen #f)
+ (SDL_Quit))))
(define (clear-screen)
(glClear (+ GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT)))
(SDL_GL_SwapBuffers))
-(define set-2d-mode #f)
-(define set-3d-mode #f)
-(define 3d-mode? #f)
+(define screen-title "")
+
+(define (set-screen-title! title)
+ (set! screen-title title)
+ (SDL_WM_SetCaption title ""))
+
+(define (get-screen-title)
+ screen-title)
+
+
+(define mode '2d)
+
+(define (set-2d-mode)
+ (set! mode '2d)
+ (glDisable GL_DEPTH_TEST)
+ (resize-screen-GL (get-screen-width) (get-screen-height)))
+
+(define (set-3d-mode)
+ (set! mode '3d)
+ (glClearDepth 1)
+ (glEnable GL_DEPTH_TEST)
+ (glDepthFunc GL_LEQUAL)
+ (resize-screen-GL (get-screen-width) (get-screen-height)))
+
+(define (3d-mode?)
+ (eq? mode '3d))
-(let ((mode '2d))
- (set! set-2d-mode
- (lambda ()
- (set! mode '2d)
- (glDisable GL_DEPTH_TEST)
- (resize-screen-GL (get-screen-width) (get-screen-height))))
- (set! set-3d-mode
- (lambda ()
- (set! mode '3d)
- (glClearDepth 1)
- (glEnable GL_DEPTH_TEST)
- (glDepthFunc GL_LEQUAL)
- (resize-screen-GL (get-screen-width) (get-screen-height))))
+(define fullscreen 'off)
- (set! 3d-mode?
- (lambda ()
- (eq? mode '3d))))
+(define* (set-fullscreen! fs #:optional (toggle #t))
+ (cond ((or (and (eq? fullscreen 'on) (eq? fs 'off))
+ (and (eq? fullscreen 'off) (eq? fs 'on)))
+ (set! fullscreen fs)
+ (cond (toggle
+ (SDL_WM_ToggleFullScreen screen))))))
+
+(define (get-fullscreen)
+ fullscreen)
(define (init-gl)
(glLoadIdentity))
+;;; Frames per second
+
+(define time 0)
+(define frames-per-second 20)
+(define time-per-frame 50) ;in ms
+
+(define (get-frames-per-second)
+ frames-per-second)
+
+(define (set-frames-per-second! fps)
+ (set! frames-per-second fps)
+ (set! time-per-frame (/ 1000.0 fps)))
+
+(define (init-frame-time)
+ (set! time (SDL_GetTicks)))
+
+(define (get-frame-time)
+ time)
+
+(define (delay-frame)
+ (let ((frame-time (- (SDL_GetTicks) time)))
+ (cond ((< frame-time time-per-frame)
+ (SDL_Delay (- time-per-frame frame-time))))))
+
+
;;; Drawing
-(define get-current-color #f)
-(define set-current-color #f)
+(define current-color '(1 1 1 1))
-(let ((current-color '(1 1 1 1)))
- (set! get-current-color
- (lambda ()
- current-color))
+(define (get-current-color)
+ current-color)
- (set! set-current-color
- (lambda* (red green blue #:optional (alpha 1))
- (set! current-color (list red green blue alpha))
- (glColor4f red green blue alpha))))
+(define* (set-current-color red green blue #:optional (alpha 1))
+ (set! current-color (list red green blue alpha))
+ (glColor4f red green blue alpha))
(define-macro (with-color color . code)
(cond (color
(else (let ((zoomx (/ (+ width 0.5) old-width)) (zoomy (/ (+ height 0.5) old-height)))
(zoomSurface surface zoomx zoomy 0))))))
-(define* (load-texture filename #:key (min-filter GL_LINEAR) (mag-filter GL_LINEAR))
- (let* ((key (list filename min-filter mag-filter))
- (res (get-resource-from-cache key)))
- (cond (res res)
- (else
- (progn-textures
- (receive
- (image real-w real-h) (load-image-for-texture filename)
- (cond (image
- (let ((width (surface-w image)) (height (surface-h image))
- (byteorder (if (= SDL_BYTEORDER SDL_LIL_ENDIAN)
- (if (= (surface-format-BytesPerPixel image) 3) GL_BGR GL_BGRA)
- (if (= (surface-format-BytesPerPixel image) 3) GL_RGB GL_RGBA)))
- (texture (car (glGenTextures 1))))
-
- (glBindTexture GL_TEXTURE_2D texture)
- (glTexImage2D GL_TEXTURE_2D 0 4 width height 0 byteorder GL_UNSIGNED_BYTE (surface-pixels image))
- (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER min-filter)
- (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER mag-filter)
- (set-texture-size! texture real-w real-h)
- (insert-resource-into-cache key texture)
- texture)))))))))
-
-(define* (draw-texture texture #:optional (zoom 1))
+(define* (load-texture-without-cache filename #:key (min-filter GL_LINEAR) (mag-filter GL_LINEAR))
+ (progn-textures
+ (receive
+ (image real-w real-h) (load-image-for-texture filename)
+ (cond (image
+ (let ((width (surface-w image)) (height (surface-h image))
+ (byteorder (if (= SDL_BYTEORDER SDL_LIL_ENDIAN)
+ (if (= (surface-format-BytesPerPixel image) 3) GL_BGR GL_BGRA)
+ (if (= (surface-format-BytesPerPixel image) 3) GL_RGB GL_RGBA)))
+ (texture (car (glGenTextures 1))))
+
+ (glBindTexture GL_TEXTURE_2D texture)
+ (glTexImage2D GL_TEXTURE_2D 0 4 width height 0 byteorder GL_UNSIGNED_BYTE (surface-pixels image))
+ (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MIN_FILTER min-filter)
+ (glTexParameteri GL_TEXTURE_2D GL_TEXTURE_MAG_FILTER mag-filter)
+ (set-texture-size! texture real-w real-h)
+ texture))))))
+
+(define load-texture (use-cache-with load-texture-without-cache))
+
+(define (get-texture-properties texture)
+ `((width . ,(texture-w texture)) (height . ,(texture-h texture))))
+
+(define* (draw-texture texture #:key (zoom 1) (sprite '((0 0) (1 1))))
(cond (texture
(let ((width (texture-w texture))
(height (texture-h texture)))
- (draw-rectangle (* zoom width) (* zoom height) #:texture texture)))))
+ (draw-rectangle (* zoom width (- (caadr sprite) (caar sprite)))
+ (* zoom height (- (cadadr sprite) (cadar sprite)))
+ #:texture texture
+ #:texture-coord sprite)))))
(define* (draw-line length #:optional color)
(let ((l (/ length 2)))
(else
(draw (list 0 l) (list 0 (- l)))))))
-(define* (draw-quad v1 v2 v3 v4 #:key texture color)
+(define* (draw-quad v1 v2 v3 v4 #:key texture color (texture-coord '((0 0) (1 1))))
(cond (texture
(progn-textures
(glBindTexture GL_TEXTURE_2D texture)
(begin-draw 4)
- (draw-vertex v1 #:texture-coord '(0 0))
- (draw-vertex v2 #:texture-coord '(1 0))
- (draw-vertex v3 #:texture-coord '(1 1))
- (draw-vertex v4 #:texture-coord '(0 1))
+ (draw-vertex v1 #:texture-coord (car texture-coord))
+ (draw-vertex v2 #:texture-coord (list (caadr texture-coord) (cadar texture-coord)))
+ (draw-vertex v3 #:texture-coord (cadr texture-coord))
+ (draw-vertex v4 #:texture-coord (list (caar texture-coord) (cadadr texture-coord)))
(glEnd)))
(color
(with-color color (draw v1 v2 v3 v4)))
(else
(draw v1 v2 v3 v4))))
-(define* (draw-rectangle width height #:key texture color)
+(define* (draw-rectangle width height #:key texture color texture-coord)
(let ((w (/ width 2)) (h (/ height 2)))
(draw-quad (list (- w) h 0)
(list w h 0)
(list w (- h) 0)
(list (- w) (- h) 0)
#:texture texture
+ #: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 0 1 0)
(draw-quad (list size size size) (list -size size size) (list -size size -size) (list size size -size) #:texture (or texture-3 texture) #:color (or color-3 color))
(glNormal3f 0 -1 0)
- (draw-quad (list -size -size size) (list size -size size) (list size -size -size) (list -size -size -size) :texture (or texture-4 texture) #:color (or color-4 color))
+ (draw-quad (list -size -size size) (list size -size size) (list size -size -size) (list -size -size -size) #:texture (or texture-4 texture) #:color (or color-4 color))
(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-5 texture) #:color (or color-5 color))
+ (draw-quad (list size -size -size) (list size -size size) (list size size size) (list size size -size) #:texture (or texture-5 texture) #:color (or color-5 color))
(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)))))
+ (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 #:rest rot)
+(define (grotate . rot)
(cond ((3d-mode?)
(apply 3d-rotate rot))
(else
- (apply 2d-rotate rot))))
+ (2d-rotate (car (last-pair rot))))))
(define (3d-rotate xrot yrot zrot)
(glRotatef xrot 1 0 0)
(glLoadIdentity)
(cond ((3d-mode?) (camera-look))))
+(define-macro (glmatrix-block . code)
+ `(let ((result #f))
+ (glPushMatrix)
+ (set! result (begin ,@code))
+ (glPopMatrix)
+ result))
+
;;; Lights
-(define* (add-light #:key light position ambient (id GL_LIGHT1) (turn-on t))
- (init-lighting)
- (and light (glLightfv id GL_DIFFUSE (first light) (second light) (third light) (fourth light)))
- (and light position (glLightfv GL_POSITION (first position) (second position) (third position) (fourth position)))
- (and ambient (glLightfv id GL_AMBIENT (first ambient) (second ambient) (third ambient) (fourth ambient)))
- (and turn-on (glEnable id))
- id)
+;; (define* (add-light #:key light position ambient (id GL_LIGHT1) (turn-on t))
+;; (init-lighting)
+;; (and light (glLightfv id GL_DIFFUSE (car light) (cadr light) (caddr light) (cadddr light)))
+;; (and light position (glLightfv GL_POSITION (car position) (cadr position) (caddr position) (cadddr position)))
+;; (and ambient (glLightfv id GL_AMBIENT (car ambient) (cadr ambient) (caddr ambient) (cadddr ambient)))
+;; (and turn-on (glEnable id))
+;; id)
;;; Camera
-(define set-camera #f)
-(define camera-look #f)
+(define camera-eye '(0 0 0))
+(define camera-center '(0 0 -100))
+(define camera-up '(0 1 0))
-(let ((camera-eye '(0 0 0)) (camera-center '(0 0 -100)) (camera-up '(0 1 0)))
- (set! set-camera
- (lambda* (#:key eye center up)
- (cond (eye (set! camera-eye eye)))
- (cond (center (set! camera-center center)))
- (cond (up (set! camera-up up)))))
+(define* (set-camera #:key eye center up)
+ (cond (eye (set! camera-eye eye)))
+ (cond (center (set! camera-center center)))
+ (cond (up (set! camera-up up))))
- (set! camera-look
- (lambda ()
- (apply gluLookAt (append camera-eye camera-center camera-up)))))
+(define (camera-look)
+ (apply gluLookAt (append camera-eye camera-center camera-up)))
;;; Text and fonts
-(define* (load-font font-file #:key (size 40) (encoding ft_encoding_unicode))
- (let* ((key (list font-file))
- (font (get-resource-from-cache key)))
- (cond ((not font)
- (set! font (ftglCreateTextureFont font-file))
- (insert-resource-into-cache key font)))
+(define* (load-font-without-cache font-file #:key (size 40) (encoding ft_encoding_unicode))
+ (let ((font (ftglCreateTextureFont font-file size)))
(ftglSetFontFaceSize font size 72)
(ftglSetFontCharMap font encoding)
font))
+(define load-font (use-cache-with load-font-without-cache))
+
(define* (render-text text font #:key (size #f))
- (cond (size (ftglSetFontFaceSize font size 72)))
+ (cond (size
+ (cond ((not (= (ftglGetFontFaceSize font) size))
+ (ftglSetFontFaceSize font size 72))))
+ ((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 (define-mesh header . body)
+ (let ((name (car header))
+ (args (cdr header)))
+ `(define* ,header
+ (let ((m (make-mesh
+ ',name
+ (lambda (props)
+ (apply (lambda* ,args ,@body)
+ ((@ (gacela utils) arguments-apply) ,name props))))))
+ (mesh-properties-set! m (list ,@(map (lambda (a) `(cons ',a ,a)) (names-arguments args))))
+ m))))
+
+(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))
+
+
+(module-map (lambda (sym var)
+ (if (not (eq? sym '%module-public-interface))
+ (module-export! (current-module) (list sym))))
+ (current-module))