Microsoft Small Basic

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' Lunar Module
' Copyright © Nonki Takahashi. The MIT License.
' 2014-10-02 15:43:13 Shapes generated by Shapes 1.6b.
' Version 1.0
' Last update 2014-12-22
' Program ID DTF312-2
'
title = "Lunar Module 1.0"
Not = "False=True;True=False;"
gw = 598
gh = 428
GraphicsWindow.Title = title
GraphicsWindow.Width = gw
GraphicsWindow.Height = gh
GraphicsWindow.BackgroundColor = "Black"
GraphicsWindow.FontName = "Trebuchet MS"
SB_Workaround()
DrawStars()
CAPTIONCOLOR = "#80FFFFFF"
AddTitle()
' initialize shapes for Lunar Module
Shapes_Init()
' add shapes
scale = 0.1
angle = 0
iMin = 1
iMax = 18
Shapes_Add()
x = (gw - 45) / 2
dy = 1
' side thruster off
For op = 100 To 0 Step -1
  Shapes.SetOpacity(shape[2]["obj"], op)
  Shapes.SetOpacity(shape[3]["obj"], op)
EndFor
ys = 125
ye = gh
For y = ys To ye Step dy
  op = (ye - y) / (ye - ys) * 50
  Shapes_Move()
  Shapes.SetOpacity(shape[1]["obj"], op)  ' main frame
  Program.Delay(1000 / 24)
EndFor
RemoveTitle()
DrawMoon()
DrawVScale()
lmw = 9     ' Lunar Module width [m]
lmh = 6     ' Lunar Module height [m]
fw = 1      ' frame width [m]
fh = 4      ' frame height [m]
gap = 0.5   ' gap between LM and frame [m]
pxpm = 5    ' [px/m]
x = 175                 ' [px]
y = y0 - 170 / 2 * pxpm ' [px]
MoveLM()
m = 15000   ' mass of LM [kg] = 15[t]
g = 9.8 / 6 ' acceleration due to gravity on the surface of the Moon [m/s^2]
f = 45040   ' descent engine thrust [N]
f2 = 455    ' side thruster thrust [N]
a = f / m   ' acceleration by descent engine [m/s^2]
a2 = f2 / m ' acceleration by side thruster [m/s^2]
vx2 = 0     ' velocity x [m/s]
vy2 = 0     ' velocity y [m/s]
engineOn = "False"
rightOn = "False"
leftOn = "False"
GraphicsWindow.KeyDown = OnKeyDown
GraphicsWindow.KeyUp = OnKeyUp
t2 = Clock.ElapsedMilliseconds / 1000
gameOver = "False"
maxLanding = Array.GetItemCount(points)
nLanding = 0
While Not[gameOver]
  Program.Delay(1000 / 24)
  t1 = t2
  t2 = Clock.ElapsedMilliseconds / 1000
  dt = t2 - t1  ' [s]
  vx1 = vx2
  vy1 = vy2
  If engineOn Then
    Shapes.SetOpacity(shape[1]["obj"], 50)  ' main frame
    vy2 = vy1 + (g - a) * dt  ' [m/s]
  Else
    Shapes.SetOpacity(shape[1]["obj"], 0)   ' main frame
    vy2 = vy1 + g * dt        ' [m/s]
  EndIf
  If rightOn Then
    Shapes.SetOpacity(shape[2]["obj"], 50)  ' right frame
    vx2 = vx1 + a2 * dt       ' [m/s]
  Else
    Shapes.SetOpacity(shape[2]["obj"], 0)   ' right frame
  EndIf
  If leftOn Then
    Shapes.SetOpacity(shape[3]["obj"], 50)  ' left frame
    vx2 = vx1 - a2 * dt       ' [m/s]
  Else
    Shapes.SetOpacity(shape[3]["obj"], 0)   ' left frame
  EndIf
  dx = (vx2 + vx1) * dt / 2 * pxpm ' [px]
  x = x + dx  ' [px]
  dy = (vy2 + vy1) * dt / 2 * pxpm ' [px]
  y = y + dy  ' [px]
  XtoY0()
  If y0 - lmh / 2 * pxpm <= y Then
    y = y0 - lmh / 2 * pxpm
    If 1 < vy2 Then
      fault = "True"
      gameOver = "True"
    Else
      landing = "True"
    EndIf
    vy2 = 0
    vx2 = 0
  Else
    landing = "False"
  EndIf
  ShowV()
  MoveLM()
  If landing Then
    If Array.ContainsIndex(points, range) And score[range] = "" Then
      nLanding = nLanding + 1
      score[range] = points[range]
      If nLanding = maxLanding Then
        gameOver = "True"
      EndIf
    EndIf
  EndIf
EndWhile
If fault Then
  angle = 10
  Shapes_Rotate()
EndIf
ShowScore()
Sub AddTitle
  ' param title
  GraphicsWindow.BrushColor = CAPTIONCOLOR
  GraphicsWindow.FontSize = 50
  objTitle = Shapes.AddText(title)
  x = (gw - 409) / 2
  y = (gh - 100) / 2
  Shapes.Move(objTitle, x, y)
EndSub
Sub DrawMoon
  terrain = "1=0,31;2=20,36;3=71,377;4=99,314;5=175,314;"
  terrain = terrain + "6=247,418;7=328,296;8=391,296;"
  terrain = terrain + "9=393,194;10=429,163;11=472,414;"
  terrain = terrain + "12=539,414;13=590,300;14=598,319;"
  points = "4-5=10;7-8=30;11-12=60;"
  y0 = gh - 10
  GraphicsWindow.PenWidth = 0
  i = 1
  GetTerrain()
  x1 = x2
  y1 = y2
  For i = 2 To Array.GetItemCount(terrain)
    GraphicsWindow.BrushColor = "DimGray"
    GetTerrain()
    ymax = Math.Max(y1, y2)
    If y1 < y2 Then
      moon = Shapes.AddTriangle(0, 0, x2 - x1, y2 - y1, 0, y2 - y1)
      Shapes.Move(moon, x1, y1)
    ElseIf y2 < y1 Then
      moon = Shapes.AddTriangle(0, y1 - y2, x2 - x1, 0, x2 - x1, y1 - y2)
      Shapes.Move(moon, x1, y2)
    EndIf
    moon = Shapes.AddRectangle(x2 - x1, gh - ymax)
    Shapes.Move(moon, x1, ymax)
    range = (i - 1) + "-" + i
    If points[range] <> "" Then
      GraphicsWindow.BrushColor = CAPTIONCOLOR
      GraphicsWindow.FontSize = 12
      point = Shapes.AddText(points[range])
      Shapes.Move(point, x1 + (x2 - x1) / 2 - 6, ymax)
    EndIf
    x1 = x2
    y1 = y2
  EndFor
EndSub
Sub DrawStars
  GraphicsWindow.PenWidth = 0
  For i = 1 To 1000
    l = Math.GetRandomNumber(256) - 1
    GraphicsWindow.BrushColor = GraphicsWindow.GetColorFromRGB(l, l, l)
    x = Math.GetRandomNumber(gw)
    y = Math.GetRandomNumber(gh)
    s = Math.GetRandomNumber(2)
    GraphicsWindow.FillEllipse(x, y, s, s)
  EndFor
EndSub
Sub DrawVScale
  GraphicsWindow.BrushColor = "#99000000"
  GraphicsWindow.FillRectangle(10, 10, 40, gh - 40)
  GraphicsWindow.PenWidth = 2
  scaleColor = CAPTIONCOLOR
  GraphicsWindow.PenColor = scaleColor
  GraphicsWindow.BrushColor = scaleColor
  GraphicsWindow.FontSize = 12
  u = Shapes.AddText("v[m/s]")
  Shapes.Move(u, 10, 10)
  For v = -20 To 20
    y = 30 + (1 - v / 20) * ((gh - 60) / 2)
    If Math.Remainder(v + 20, 5) = 0 Then
      s = Shapes.AddLine(0, 0, 30, 0) ' step
      Shapes.Move(s, 10, y)
      n = Shapes.AddText(v)           ' number
      Shapes.Move(n, 10, y)
    Else
      s = Shapes.AddLine(0, 0, 10, 0) ' step
      Shapes.Move(s, 30, y)
    EndIf
  EndFor
  Program.Delay(300)  ' for Silverlight
  GraphicsWindow.PenWidth = 0
  GraphicsWindow.BrushColor = scaleColor
  vHand = Shapes.AddTriangle(0, 0, 10, -5, 10, 5)
  Shapes.Move(vHand, 40, 10 + (gh - 60) / 2)
EndSub
Sub GetTerrain
  ' param i - index to a point of terrain
  ' return x2, y2 - the point
  c = Text.GetIndexOf(terrain[i], ",")
  x2 = Text.GetSubText(terrain[i], 1, c - 1)
  y2 = Text.GetSubTextToEnd(terrain[i], c + 1)
EndSub
Sub MoveLM
  Stack.PushValue("local", x)
  Stack.PushValue("local", y)
  x = x - lmw / 2 * pxpm
  y = y - lmh / 2 * pxpm
  Shapes_Move()
  y = Stack.PopValue("local")
  x = Stack.PopValue("local")
EndSub
Sub OnKeyDown
  key = GraphicsWindow.LastKey
  If key = "Up" Then
    engineOn = "True"
  ElseIf key = "Right" Then
    rightOn = "True"
  ElseIf key = "Left" Then
    leftOn = "True"
  EndIf
EndSub
Sub OnKeyUp
  key = GraphicsWindow.LastKey
  If key = "Up" Then
    engineOn = "False"
  ElseIf key = "Right" Then
    rightOn = "False"
  ElseIf key = "Left" Then
    leftOn = "False"
  EndIf
EndSub
Sub RemoveTitle
  Shapes.Remove(objTitle)
EndSub
Sub ShowScore
  GraphicsWindow.FontSize = 30
  txtGameOver = Shapes.AddText("GAME OVER")
  x = (gw - 163) / 2
  Shapes.Move(txtGameOver, x, 100)
  nScore = Array.GetItemCount(score)
  index = Array.GetAllIndices(score)
  total = 0
  For i = 1 To nScore
    total = total + score[index[i]]
  EndFor
  txtScore = Shapes.AddText("Score: " + total)
  Shapes.Move(txtScore, x, 140)
EndSub
Sub ShowV
  yV = 30 + (1 + vy2 / 20) * ((gh - 60) / 2)
  Shapes.Move(vHand, 40, yV)
EndSub
Sub XtoY0
  ' param x - Lunar Module x position (center) [px]
  ' param lmw - Lunar Module width [m]
  ' param pxpm - scale [px/m]
  ' return y0 - moon surface [px]
  ' return range - "i-j" if Lunar Module is between vertex i and j (= i + 1)
  ' for left bottom corner of Lunar Module
  x0 = x - lmw * pxpm / 2  ' Luner Module x position (left) [px]
  i = 1
  GetTerrain()
  x1 = x2
  y1 = y2
  n = Array.GetItemCount(terrain)
  For i = 2 To n
    GetTerrain()
    If x0 < x2 Then
      i0 = i
      i = n   ' break
    Else
      x1 = x2
      y1 = y2
    EndIf
  EndFor
  y0 = y1 + Math.Floor((x0 - x1) / (x2 - x1) * (y2 - y1))
  range = ""
  ' for vertex between left and right of Luner Module
  x0 = x + lmw * pxpm / 2 ' Lunar Module x position (right) [px]
  For i = i0 To n
    If x2 < x0 And y2 < y0 Then
      y0 = y2
    EndIf
    If x0 <= x2 Then
      If i = i0 Then
        range= (i0 - 1) + "-" + i0
      EndIf
      i = n   ' break
    Else
      x1 = x2
      y1 = y2
      GetTerrain()
    EndIf
  EndFor
  ' for right bottom corner of Luner Module
  _y = y1 + Math.Floor((x0 - x1) / (x2 - x1) * (y2 - y1))
  If _y < y0 Then
    y0 = _y
  EndIf
EndSub
Sub Shapes_Init
  ' Shapes | Initialize shapes data
  ' return shX, shY - current position of shapes
  ' return shape - array of shapes
  shX = 276 ' 84 ' x offset
  shY = 125 ' 114 ' y offset
  shape = ""
  shape[1] = "func=ell;x=196;y=260;width=46;height=145;bc=#FFA500;pw=0;"
  shape[2] = "func=ell;x=40;y=60;width=58;height=25;bc=#FFA500;pw=0;"
  shape[3] = "func=ell;x=332;y=60;width=58;height=25;bc=#FFA500;;pw=0;"
  shape[4] = "func=tri;x=119;y=54;x1=12;y1=0;x2=0;y2=35;x3=25;y3=35;angle=90;bc=#222222;pc=#FFFFFF;pw=2;"
  shape[5] = "func=tri;x=295;y=54;x1=12;y1=0;x2=0;y2=35;x3=25;y3=35;angle=270;bc=#222222;pc=#FFFFFF;pw=2;"
  shape[6] = "func=ell;x=262;y=80;width=69;height=69;bc=#666666;pc=#FFFFFF;pw=2;"
  shape[7] = "func=ell;x=134;y=0;width=171;height=165;bc=#777777;pc=#FFFFFF;pw=2;"
  shape[8] = "func=tri;x=155;y=50;x1=30;y1=0;x2=0;y2=30;x3=60;y3=30;angle=45;bc=#000000;pc=#FFFFFF;pw=2;"
  shape[9] = "func=tri;x=223;y=50;x1=30;y1=0;x2=0;y2=30;x3=60;y3=30;angle=315;bc=#000000;pc=#FFFFFF;pw=2;"
  shape[10] = "func=tri;x=177;y=164;x1=40;y1=0;x2=0;y2=70;x3=81;y3=70;bc=#222222;pc=#FFFFFF;pw=2;"
  shape[11] = "func=rect;x=196;y=0;width=46;height=145;bc=#888888;pc=#FFFFFF;pw=2;"
  shape[12] = "func=rect;x=128;y=142;width=186;height=66;bc=#554400;pc=#FFFFFF;pw=2;"
  shape[13] = "func=line;x=38;y=142;x1=90;y1=0;x2=0;y2=144;pc=#FFFFFF;pw=2;"
  shape[14] = "func=line;x=0;y=286;x1=0;y1=0;x2=86;y2=0;pc=#FFFFFF;pw=2;"
  shape[15] = "func=line;x=312;y=142;x1=0;y1=0;x2=92;y2=144;pc=#FFFFFF;pw=2;"
  shape[16] = "func=line;x=355;y=286;x1=0;y1=0;x2=91;y2=0;pc=#FFFFFF;pw=2;"
  shape[17] = "func=line;x=175;y=286;x1=0;y1=0;x2=91;y2=0;pc=#FFFFFF;pw=2"
  shape[18] = "func=line;x=217;y=142;x1=0;y1=0;x2=2;y2=144;pc=#FFFFFF;pw=2;"
EndSub
Sub Math_CartesianToPolar
  ' Math | convert cartesian coodinate to polar coordinate
  ' param x, y - cartesian coordinate
  ' return r, a - polar coordinate
  r = Math.SquareRoot(x * x + y * y)
  If x = 0 And y > 0 Then
    a = 90 ' [degree]
  ElseIf x = 0 And y < 0 Then
    a = -90
  Else
    a = Math.ArcTan(y / x) * 180 / Math.Pi
  EndIf
  If x < 0 Then
    a = a + 180
  ElseIf x > 0 And y < 0 Then
    a = a + 360
  EndIf
EndSub
Sub SB_RotateWorkaround
  ' Small Basic | Rotate workaround for Silverlight
  ' param x, y - original coordinate
  ' param alpha - angle [radian]
  ' returns x, y - workaround coordinate
  If shape[i]["func"] = "tri" Then
    x1 = -Math.Floor(shape[i]["x3"] / 2)
    y1 = -Math.Floor(shape[i]["y3"] / 2)
  ElseIf shape[i]["func"] = "line" Then
    x1 = -Math.Floor(Math.Abs(shape[i]["x1"] - shape[i]["x2"]) / 2)
    y1 = -Math.Floor(Math.Abs(shape[i]["y1"] - shape[i]["y2"]) / 2)
  EndIf
  ox = x - x1
  oy = y - y1
  x = x1 * Math.Cos(alpha) - y1 * Math.Sin(alpha) + ox
  y = x1 * Math.Sin(alpha) + y1 * Math.Cos(alpha) + oy
EndSub
Sub SB_Workaround
  ' Small Basic | Workaround for Silverlight
  ' returns silverlight - "True" if in remote
  color = GraphicsWindow.GetPixel(0, 0)
  If Text.GetLength(color) > 7 Then
    silverlight = "True"
    msWait = 300
  Else
    silverlight = "False"
  EndIf
EndSub
Sub Shapes_Add
  ' Shapes | add shapes as shapes data
  ' param iMin, iMax - shape indices to add
  ' param shape - array of shapes
  ' param scale - 1 if same scale
  ' return shWidth, shHeight - total size of shapes
  ' return shAngle - current angle of shapes
  Stack.PushValue("local", i)
  Stack.PushValue("local", x)
  Stack.PushValue("local", y)
  Shapes_CalcWidthAndHeight()
  s = scale
  For i = iMin To iMax
    GraphicsWindow.PenWidth = shape[i]["pw"] * s
    If shape[i]["pw"] > 0 Then
      GraphicsWindow.PenColor = shape[i]["pc"]
    EndIf
    If Text.IsSubText("rect|ell|tri|text", shape[i]["func"]) Then
      GraphicsWindow.BrushColor = shape[i]["bc"]
    EndIf
    If shape[i]["func"] = "rect" Then
      shape[i]["obj"] = Shapes.AddRectangle(shape[i]["width"] * s, shape[i]["height"] * s)
    ElseIf shape[i]["func"] = "ell" Then
      shape[i]["obj"] = Shapes.AddEllipse(shape[i]["width"] * s, shape[i]["height"] * s)
    ElseIf shape[i]["func"] = "tri" Then
      shape[i]["obj"] = Shapes.AddTriangle(shape[i]["x1"] * s, shape[i]["y1"] * s, shape[i]["x2"] * s, shape[i]["y2"] * s, shape[i]["x3"] * s, shape[i]["y3"] * s)
    ElseIf shape[i]["func"] = "line" Then
      shape[i]["obj"] = Shapes.AddLine(shape[i]["x1"] * s, shape[i]["y1"] * s, shape[i]["x2"] * s, shape[i]["y2"] * s)
    ElseIf shape[i]["func"] = "text" Then
      If silverlight Then
        fs = Math.Floor(shape[i]["fs"] * 0.9)
      Else
        fs = shape[i]["fs"]
      EndIf
      GraphicsWindow.FontSize = fs * s
      GraphicsWindow.FontName = shape[i]["fn"]
      shape[i]["obj"] = Shapes.AddText(shape[i]["text"])
    EndIf
    x = shape[i]["x"]
    y = shape[i]["y"]
    shape[i]["rx"] = x
    shape[i]["ry"] = y
    If silverlight And Text.IsSubText("tri|line", shape[i]["func"]) Then
      alpha = Math.GetRadians(shape[i]["angle"])
      SB_RotateWorkaround()
      shape[i]["wx"] = x
      shape[i]["wy"] = y
    EndIf
    Shapes.Move(shape[i]["obj"], shX + x * s, shY + y * s)
    If Text.IsSubText("rect|ell|tri|text", shape[i]["func"]) And shape[i]["angle"] <> 0 Then
      Shapes.Rotate(shape[i]["obj"], shape[i]["angle"])
    EndIf
  EndFor
  shAngle = 0
  y = Stack.PopValue("local")
  x = Stack.PopValue("local")
  i = Stack.PopValue("local")
EndSub
Sub Shapes_CalcRotatePos
  ' Shapes | Calculate position for rotated shape
  ' param["x"], param["y"] - position of a shape
  ' param["width"], param["height"] - size of a shape
  ' param ["cx"], param["cy"] - center of rotation
  ' param ["angle"] - rotate angle
  ' return x, y - rotated position of a shape
  _cx = param["x"] + param["width"] / 2
  _cy = param["y"] + param["height"] / 2
  x = _cx - param["cx"]
  y = _cy - param["cy"]
  Math_CartesianToPolar()
  a = a + param["angle"]
  x = r * Math.Cos(a * Math.Pi / 180)
  y = r * Math.Sin(a * Math.Pi / 180)
  _cx = x + param["cx"]
  _cy = y + param["cy"]
  x = _cx - param["width"] / 2
  y = _cy - param["height"] / 2
EndSub
Sub Shapes_CalcWidthAndHeight
  ' Shapes | Calculate total width and height of shapes
  ' param iMin, iMax - shape indices to add
  ' return shWidth, shHeight - total size of shapes
  For i = iMin To iMax
    If shape[i]["func"] = "tri" Or shape[i]["func"] = "line" Then
      xmin = shape[i]["x1"]
      xmax = shape[i]["x1"]
      ymin = shape[i]["y1"]
      ymax = shape[i]["y1"]
      If shape[i]["x2"] < xmin Then
        xmin = shape[i]["x2"]
      EndIf
      If xmax < shape[i]["x2"] Then
        xmax = shape[i]["x2"]
      EndIf
      If shape[i]["y2"] < ymin Then
        ymin = shape[i]["y2"]
      EndIf
      If ymax < shape[i]["y2"] Then
        ymax = shape[i]["y2"]
      EndIf
      If shape[i]["func"] = "tri" Then
        If shape[i]["x3"] < xmin Then
          xmin = shape[i]["x3"]
        EndIf
        If xmax < shape[i]["x3"] Then
          xmax = shape[i]["x3"]
        EndIf
        If shape[i]["y3"] < ymin Then
          ymin = shape[i]["y3"]
        EndIf
        If ymax < shape[i]["y3"] Then
          ymax = shape[i]["y3"]
        EndIf
      EndIf
      shape[i]["width"] = xmax - xmin
      shape[i]["height"] = ymax - ymin
    EndIf
    If i = 1 Then
      shWidth = shape[i]["x"] + shape[i]["width"]
      shHeight = shape[i]["y"] + shape[i]["height"]
    Else
      If shWidth < shape[i]["x"] + shape[i]["width"] Then
        shWidth = shape[i]["x"] + shape[i]["width"]
      EndIf
      If shHeight < shape[i]["y"] + shape[i]["height"] Then
        shHeight = shape[i]["y"] + shape[i]["height"]
      EndIf
    EndIf
  EndFor
EndSub
Sub Shapes_Move
  ' Shapes | Move shapes
  ' param iMin, iMax - shape indices to add
  ' param shape - array of shapes
  ' param scale - to zoom
  ' param x, y - position to move
  ' return shX, shY - new position of shapes
  Stack.PushValue("local", i)
  s = scale
  shX = x
  shY = y
  For i = iMin To iMax
    If silverlight And Text.IsSubText("tri|line", shape[i]["func"]) Then
      _x = shape[i]["wx"]
      _y = shape[i]["wy"]
    Else
      _x = shape[i]["rx"]
      _y = shape[i]["ry"]
    EndIf
    Shapes.Move(shape[i]["obj"], shX + _x * s, shY + _y * s)
  EndFor
  i = Stack.PopValue("local")
EndSub
Sub Shapes_Remove
  ' Shapes | Remove shapes
  ' param iMin, iMax - shapes indices to remove
  ' param shape - array of shapes
  Stack.PushValue("local", i)
  For i = iMin To iMax
    Shapes.Remove(shape[i]["obj"])
  EndFor
  i = Stack.PopValue("local")
EndSub
Sub Shapes_Rotate
  ' Shapes | Rotate shapes
  ' param iMin, iMax - shapes indices to rotate
  ' param shape - array of shapes
  ' param scale - to zoom
  ' param angle - to rotate
  Stack.PushValue("local", i)
  Stack.PushValue("local", x)
  Stack.PushValue("local", y)
  s = scale
  param["angle"] = angle
  param["cx"] = shWidth / 2
  param["cy"] = shHeight / 2
  For i = iMin To iMax
    param["x"] = shape[i]["x"]
    param["y"] = shape[i]["y"]
    param["width"] = shape[i]["width"]
    param["height"] = shape[i]["height"]
    Shapes_CalcRotatePos()
    shape[i]["rx"] = x
    shape[i]["ry"] = y
    If silverlight And Text.IsSubText("tri|line", shape[i]["func"]) Then
      alpha = Math.GetRadians(angle + shape[i]["angle"])
      SB_RotateWorkAround()
      shape[i]["wx"] = x
      shape[i]["wy"] = y
    EndIf
    Shapes.Move(shape[i]["obj"], shX + x * s, shY + y * s)
    Shapes.Rotate(shape[i]["obj"], angle + shape[i]["angle"])
  EndFor
  y = Stack.PopValue("local")
  x = Stack.PopValue("local")
  i = Stack.PopValue("local")
EndSub
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