我已经用 SLIME 配置了 emacs,以便在 Arch Linux 上使用 Common Lisp (sbcl) 进行开发。问题是,我现在也想开始使用 OpenGL,所以我安装了 cl-opengl 来提供必要的绑定。我还在 .local/share/common-lisp 上设置了一个到 /usr/share/common-lisp 的符号链接(我应该能够以这种方式使用 ASDF 加载所有系统)。
但是,当我尝试在 SLIME 中编译以下代码时(使用 Cc Ck)
(require :asdf) ; need ASDF to load other things
(asdf:load-system :cl-opengl) ; load OpenGL bindings
(asdf:load-system :cl-glu) ; load GLU bindings
(asdf:load-system :cl-glut) ; load GLUT bindings
(defclass my-window (glut:window)
()
(:default-initargs :width 400 :height 300
:title "My Window Title"
:x 100 :y 100
:mode '(:double :rgb :depth)))
(defmethod glut:display-window :before ((win my-window))
(gl:shade-model :smooth) ; enables smooth shading
(gl:clear-color 0 0 0 0) ; background will be black
(gl:clear-depth 1) ; clear buffer to maximum depth
(gl:enable :depth-test) ; enable depth testing
(gl:depth-func :lequal) ; okay to write pixel if its depth
; is less-than-or-equal to the
; depth currently written
; really nice perspective correction
(gl:hint :perspective-correction-hint :nicest)
)
(defmethod glut:display ((win my-window))
(gl:clear :color-buffer-bit :depth-buffer-bit)
(gl:load-identity))
(defmethod glut:reshape ((win my-window) width height)
(gl:viewport 0 0 width height) ; reset the current viewport
(gl:matrix-mode :projection) ; select the projection matrix
(gl:load-identity) ; reset the matrix
;; set perspective based on window aspect ratio
(glu:perspective 45 (/ width (max height 1)) 1/10 100)
(gl:matrix-mode :modelview) ; select the modelview matrix
(gl:load-identity) ; reset the matrix
)
(glut:display-window (make-instance 'my-window))
我收到以下错误:
READ error during COMPILE-FILE:
Package GLUT does not exist.
即使 cl-glut.asd 存在于 /usr/share/common-lisp/systems 中。
我究竟做错了什么?