scene:viewer

(scene:viewer &key title width height background)

Opens a window with a Metal surface on it and answers the viewer -- a CLOS instance, not a set of globals, so two windows can exist in one image and orbit independently. Drag to orbit, shift-drag to pan, scroll to dolly, and resize the window; the camera gestures redraw by themselves, while the mutators below do not (a loop adding sixty solids must not draw sixty frames -- the step after them is scene:refresh). Part of the scene package, a 3-D viewer for geom solids written in rontolisp over metal and appkit and loaded on first use: macOS (java -jar, the rontolisp binary, or a compiled .class / .jar; never a .wasm), with a display. See the solid modeling guide.

CL-USER> (defvar *v* (scene:viewer :title "arm" :width 900 :height 640))
CL-USER> (scene:add *v* (geom:cylinder :radius 60 :height 140))
CL-USER> (scene:fit *v*)
CL-USER> (scene:refresh *v*)