lines.2dpy

def Init():
   # --- author : jamesc

   STR.SetFParam0Name("Fade")
   STR.SetFParam1Name("Thickness")
   STR.SetFParam2Name("Speed")
   GLB.slots = STR.GetMaxSlots()
   GLB.xmode = 0
   # ---    accent : random color
   # ---    trigger : toggle color

   GLB.NUM_OBJS = 12
   GLB.objs = [{} for i in range(GLB.NUM_OBJS)]
   for i in range(GLB.NUM_OBJS):
      GLB.objs[i].update({'xpos' : np.random.randint(low=0, high=320), 'ypos' : np.random.randint(low=0, high=240), 'xdir' :np.random.random() * 8.0 - 4.0 , 'ydir' : np.random.random() * 8.0 - 4.0, 'size' : np.random.randint(low=2, high=32), 'r' : np.random.random(), 'g' : np.random.random(), 'b' : np.random.random() }  ) 

   # --- clear screen
   cr.set_source_rgba(0,0,0,1)
   cr.rectangle(0,0,320,240)
   cr.fill()
     

   def update(objs, f1, f2, a, xmode): 
      for i in range(GLB.NUM_OBJS):
         if (xmode):
            cr.set_source_rgb(objs[i]['b'], objs[i]['g'], objs[i]['r'])
         else :
            cr.set_source_rgb(1, 1, 1)

         if (a):
            objs[i]['r'] = np.random.random()
            objs[i]['g'] = np.random.random()
            objs[i]['b'] = np.random.random()
            cr.set_source_rgb(objs[i]['b'], objs[i]['g'], objs[i]['r'])

         cr.set_line_width(f1 * 8.0 + 1)
         cr.set_line_cap(cairo.LINE_CAP_ROUND)
         cr.move_to(objs[i]['xpos'], objs[i]['ypos'] )

         if (i == (GLB.NUM_OBJS -1) ):
            cr.line_to(objs[0]['xpos'], objs[0]['ypos'] )
         else :
            cr.line_to(objs[i+1]['xpos'], objs[i+1]['ypos'] )
         cr.stroke()

         # --- move objects
         objs[i]['xpos'] = objs[i]['xpos'] + objs[i]['xdir'] * f2
         if (objs[i]['xpos'] > 320) :
            objs[i]['xpos'] = 320
            objs[i]['xdir'] =  objs[i]['xdir'] * -1
            if (a):
               objs[i]['r'] = np.random.random()
               objs[i]['g'] = np.random.random()
               objs[i]['b'] = np.random.random()
         elif (objs[i]['xpos'] < 0) :
            objs[i]['xpos'] = 0
            objs[i]['xdir'] =  objs[i]['xdir'] * -1
            
         objs[i]['ypos'] =  objs[i]['ypos'] + objs[i]['ydir'] * f2
         if (objs[i]['ypos'] > 240) :
            objs[i]['ypos'] =  240
            objs[i]['ydir'] = objs[i]['ydir'] * -1
         elif (objs[i]['ypos'] < 0) :
            objs[i]['ypos'] = 0
            objs[i]['ydir'] =  objs[i]['ydir'] * -1

   GLB.update = update

def Render(cr):
   acc = STR.CheckAccent()
   trig = STR.CheckTrigger()
   f0 = STR.F0()
   f1 = STR.F1()
   f2 = STR.F2()

   # --- clear screen
   cr.set_source_rgba(0,0,0,f0) 
   cr.rectangle(0,0,320,240)
   cr.fill()

   if trig:
      GLB.xmode = 1 if GLB.xmode==0 else 0

   GLB.update(GLB.objs, f1, f2, acc, GLB.xmode)