X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=gacela_draw.lisp;h=8cff747d38ebc59bb222e10bd49b415d2ea3e1b4;hb=6a3d1ffb69036e6d4f1c239fd7d52f9bfc48d50c;hp=5d10fa4eebb8a2d9ed5009020e8f52ca73ae655e;hpb=c0c271a74a11ccba4e5c2c51e46045c9073c32a6;p=gacela.git diff --git a/gacela_draw.lisp b/gacela_draw.lisp index 5d10fa4..8cff747 100644 --- a/gacela_draw.lisp +++ b/gacela_draw.lisp @@ -14,25 +14,23 @@ ;;; You should have received a copy of the GNU General Public License ;;; along with this program. If not, see . -(in-package :gacela) -(let ((mode '2d)) - (defun 2d-mode () - (glDisable GL_DEPTH_TEST) - (setq mode '2d)) +(eval-when (compile load eval) + (when (not (find-package 'gacela)) (make-package 'gacela :nicknames '(gg) :use '(lisp))) + (in-package 'gacela :nicknames '(gg) :use '(lisp))) - (defun 3d-mode () - (glEnable GL_DEPTH_TEST) - (setq mode '3d)) - - (defun 3d-mode? () - (eq mode '3d))) (defmacro with-color (color &body code) - `(let ((original-color (get-current-color))) - (apply #'set-current-color ,color) - ,@code - (apply #'set-current-color original-color))) + (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) @@ -73,12 +71,17 @@ (cond ((/= image 0) (let* ((width (surface-w image)) (height (surface-h image)) (power-2 (nearest-power-of-two (min width height))) - (zoomx (/ power-2 width)) (zoomy (/ power-2 height)) - zoomed-image) - (cond ((and (= zoomx 1) (= zoomy 1)) (values image width height)) - (t (setq zoomed-image (zoomSurface image zoomx zoomy 0)) + 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 ((/= zoomed-image 0) (values zoomed-image width height)))))))))) + (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))) @@ -96,6 +99,7 @@ (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) @@ -108,24 +112,29 @@ :static static) key))))))) -(defun draw-image-function (filename) +(defun draw-image (filename &ptional (zoom 1)) (let ((texture (load-texture filename))) - (lambda (&optional (f 1)) - (cond (texture - (let ((width (getf (get-resource texture) :width)) - (height (getf (get-resource texture) :height))) - (draw-rectangle (* f width) (* f height) :texture texture))))))) + (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) - (cond (texture (progn-textures - (glBindTexture GL_TEXTURE_2D (getf (get-resource texture) :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))) - (t (draw v1 v2 v3 v4)))) + (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))) @@ -134,21 +143,21 @@ (defun draw-square (&key (size 1) texture) (draw-rectangle size size :texture texture)) -(defun draw-cube (&key size 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 texture) + (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 texture) + (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 texture) + (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 texture) + (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 texture) + (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 texture)))) + (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) @@ -161,7 +170,27 @@ (defun translate (x y &optional (z 0)) (glTranslatef x y z)) -(defun rotate (xrot yrot &optional zrot) +(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) - (cond (zrot (glRotatef zrot 0 0 1)))) + (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))))