examples/glut/glut_bindings.lua

   1 quit = false
   2
   3 function resize_func(w, h)
   4         local ratio = w / h
   5
   6         print('====== resize')
   7
   8         glMatrixMode(gl.PROJECTION)
   9         glLoadIdentity()
  10
  11         glViewport(0,0,w,h)
  12
  13         gluPerspective(45,ratio,1,1000)
  14
  15         glMatrixMode(gl.MODELVIEW)
  16         glLoadIdentity()
  17 end
  18
  19 angle = 0
  20 angle2 = 0
  21 previous_time = 0
  22
  23 function display_func()
  24
  25         if quit then return end
  26
  27         local cur_time = glutGet(glut.ELAPSED_TIME)
  28         local delta = (cur_time - previous_time) / 1000
  29         previous_time = cur_time
  30
  31         glClear(gl.COLOR_BUFFER_BIT + gl.DEPTH_BUFFER_BIT)
  32
  33         glPushMatrix()
  34
  35         glTranslate(0,0,-5)
  36         glRotate(angle, 0, 1, 0)
  37         glRotate(angle2, 0, 0, 1)
  38         glColor3(1,0,0)
  39 --      glutWireSphere(0.75, 10, 10)
  40         glutSolidTeapot(0.75)
  41 --      glColor3(1,1,1)
  42 --      glutWireTeapot(0.75)
  43
  44         glPopMatrix()
  45
  46         angle = angle + 200 * delta
  47         angle2 = angle2 + 170 * delta
  48
  49         frames = frames + 1
  50
  51         if math.mod(frames, 100) == 0 then
  52                 local fps = frames * 1000 / (glutGet(glut.ELAPSED_TIME) - start_time);
  53                 print('fps: ' .. fps .. ' time: ' .. glutGet(glut.ELAPSED_TIME) .. ' frames: ' .. frames)
  54         end
  55
  56         glutSwapBuffers()
  57 end
  58
  59 function keyboard_func(key,x,y)
  60         print('keyboard' .. key)
  61         if key == 27 then glutDestroyWindow(window) quit = true end
  62 end
  63
  64 glutInitWindowSize(600,600)
  65 glutInitWindowPosition(0,0)
  66 glutInitDisplayMode(glut.RGB + glut.DOUBLE + glut.DEPTH)
  67 window = glutCreateWindow("luabind, glut-bindings")
  68 glutDisplayFunc(display_func)
  69 glutIdleFunc(display_func)
  70 glutKeyboardFunc(keyboard_func)
  71 glutReshapeFunc(resize_func)
  72
  73 resize_func(600,600)
  74
  75 start_time = glutGet(glut.ELAPSED_TIME)
  76 frames = 0
  77
  78 glutMainLoop()
  79