+++ /dev/null
-;;; Gacela, a GNU Common Lisp extension for fast games development
-;;; Copyright (C) 2009 by Javier Sancho Fernandez <jsf at jsancho dot org>
-;;;
-;;; This program is free software: you can redistribute it and/or modify
-;;; it under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation, either version 3 of the License, or
-;;; (at your option) any later version.
-;;;
-;;; This program is distributed in the hope that it will be useful,
-;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
-(eval-when (compile load eval)
- (when (not (find-package 'gacela)) (make-package 'gacela :nicknames '(gg) :use '(lisp)))
- (in-package 'gacela :nicknames '(gg) :use '(lisp)))
-
-
-(defmacro with-color (color &body code)
- (cond (color
- `(let ((original-color (get-current-color))
- result)
- (apply #'set-current-color ,color)
- (setq result ,@code)
- (apply #'set-current-color original-color)
- result))
- (t
- `(progn
- ,@code))))
-
-(defmacro progn-textures (&body code)
- `(let (values)
- (init-video-mode)
- (glEnable GL_TEXTURE_2D)
- (setq values (multiple-value-list (progn ,@code)))
- (glDisable GL_TEXTURE_2D)
- (apply #'values values)))
-
-(defun draw (&rest vertexes)
- (begin-draw (length vertexes))
- (draw-vertexes vertexes)
- (glEnd))
-
-(defun begin-draw (number-of-points)
- (cond ((= number-of-points 3) (glBegin GL_TRIANGLES))
- ((= number-of-points 4) (glBegin GL_QUADS))))
-
-(defun draw-vertexes (vertexes)
- (cond ((null vertexes) nil)
- (t (draw-vertex (car vertexes))
- (draw-vertexes (cdr vertexes)))))
-
-(defun draw-vertex (vertex &key texture-coord)
- (cond ((consp (car vertex))
- (with-color (car vertex)
- (apply #'simple-draw-vertex (cadr vertex))))
- (t (cond (texture-coord (apply #'glTexCoord2f texture-coord)))
- (apply #'simple-draw-vertex vertex))))
-
-(defun simple-draw-vertex (x y &optional (z 0))
- (cond ((3d-mode?) (glVertex3f x y z))
- (t (glVertex2f x y))))
-
-(defun load-image-for-texture (filename)
- (init-video-mode)
- (let ((image (IMG_Load filename)))
- (cond ((/= image 0)
- (let* ((width (surface-w image)) (height (surface-h image))
- (power-2 (nearest-power-of-two (min width height)))
- resized-image)
- (cond ((and (= width power-2) (= height power-2)) (values image width height))
- (t (setq resized-image (resize-surface image power-2 power-2))
- (SDL_FreeSurface image)
- (cond ((/= resized-image 0) (values resized-image width height))))))))))
-
-(defun resize-surface (surface width height)
- (let ((old-width (surface-w surface)) (old-height (surface-h surface)))
- (cond ((and (= width old-width) (= height old-height)) surface)
- (t (let ((zoomx (/ (+ width 0.5) old-width)) (zoomy (/ (+ height 0.5) old-height)))
- (zoomSurface surface zoomx zoomy 0))))))
-
-(defun load-texture (filename &key (min-filter GL_LINEAR) (mag-filter GL_LINEAR) static)
- (let ((key (make-resource-texture :filename filename :min-filter min-filter :mag-filter mag-filter)))
- (cond ((get-resource key) key)
- (t (true-load-texture filename min-filter mag-filter static)))))
-
-(defun true-load-texture (filename min-filter mag-filter static)
- (let ((key (make-resource-texture :filename filename :min-filter min-filter :mag-filter mag-filter)))
- (progn-textures
- (multiple-value-bind
- (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 3 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)
- (SDL_FreeSurface image)
- (set-resource key
- `(:id-texture ,texture :width ,real-w :height ,real-h)
- (lambda () (true-load-texture filename min-filter mag-filter static))
- (lambda () (glDeleteTextures 1 `(,texture)))
- :static static)
- key)))))))
-
-(defun draw-image (filename &ptional (zoom 1))
- (let ((texture (load-texture filename)))
- (cond (texture (draw-texture texture zoom)))))
-
-(defun draw-texture (texture &optional (zoom 1))
- (cond (texture
- (let ((width (getf (get-resource texture) :width))
- (height (getf (get-resource texture) :height)))
- (draw-rectangle (* zoom width) (* zoom height) :texture texture)))))
-
-(defun draw-quad (v1 v2 v3 v4 &key texture)
- (let ((id-texture (getf (get-resource texture) :id-texture)))
- (cond (id-texture
- (progn-textures
- (glBindTexture GL_TEXTURE_2D id-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))
- (glEnd)))
- ((consp texture) (with-color texture (draw v1 v2 v3 v4)))
- (t (draw v1 v2 v3 v4)))))
-
-(defun draw-rectangle (width height &key texture)
- (let* ((w (/ width 2)) (-w (neg w)) (h (/ height 2)) (-h (neg h)))
- (draw-quad (list -w h 0) (list w h 0) (list w -h 0) (list -w -h 0) :texture texture)))
-
-(defun draw-square (&key (size 1) texture)
- (draw-rectangle size size :texture texture))
-
-(defun draw-cube (&key (size 1) texture texture-1 texture-2 texture-3 texture-4 texture-5 texture-6)
- (let ((-size (neg size)))
- (progn-textures
- (glNormal3f 0 0 1)
- (draw-quad (list -size size size) (list size size size) (list size -size size) (list -size -size size) :texture (or texture-1 texture))
- (glNormal3f 0 0 -1)
- (draw-quad (list -size -size -size) (list size -size -size) (list size size -size) (list -size size -size) :texture (or texture-2 texture))
- (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))
- (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))
- (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))
- (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)))))
-
-(defun 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)
-
-(defun translate (x y &optional (z 0))
- (glTranslatef x y z))
-
-(defun rotate (&rest rot)
- (cond ((3d-mode?) (apply #'3d-rotate rot))
- (t (apply #'2d-rotate rot))))
-
-(defun 3d-rotate (xrot yrot zrot)
- (glRotatef xrot 1 0 0)
- (glRotatef yrot 0 1 0)
- (glRotatef zrot 0 0 1))
-
-(defun 2d-rotate (rot)
- (glRotatef rot 0 0 1))
-
-(defun to-origin ()
- (glLoadIdentity)
- (cond ((3d-mode?) (camera-look))))
-
-(let ((camera-eye '(0 0 0)) (camera-center '(0 0 -100)) (camera-up '(0 1 0)))
- (defun set-camera (&key eye center up)
- (cond (eye (setq camera-eye eye)))
- (cond (center (setq camera-center center)))
- (cond (up (setq camera-up up))))
-
- (defun camera-look ()
- (apply #'gluLookAt (concatenate 'list camera-eye camera-center camera-up))))
projects / gacela.git / blobdiff