title = "Eta Aquariids"
Init()
' initialize shapes
Shapes_Init()
' add shapes
scale = 0.9
angle = 0
iMin = 1
iMax = 44
Shapes_Add()
r = 500 ' [px]
delay = 100 ' [ms]
Cal_Init()
InitStars()
ra = radiant["ra"]
dec = radiant["dec"]
Mapping()
rot = ra - 0.53
tilt = dec - 5
GraphicsWindow.Title = title + " | RA=" + (Math.Round(ra * 100) / 100) + "h Dec=" + dec + "°"
DrawRA()
DrawDec()
DrawStars()
DrawCalendar()
DrawMeteorShower()
While "True"
If keyDown Then
If key = "Right" Then
rot = rot + 0.25
If 24 <= rot Then
rot = rot - 24
EndIf
ElseIf key = "Left" Then
rot = rot - 0.25
If rot < 0 Then
rot = rot + 24
EndIf
ElseIf key = "Up" Then
If tilt <= 85 Then
tilt = tilt + 5
EndIf
ElseIf key = "Down" Then
If -85 <= tilt Then
tilt = tilt - 5
EndIf
ElseIf key = "Add" Then
r = r * 1.2
ElseIf key = "Subtract" Then
r = r / 1.2
EndIf
GraphicsWindow.Title = title + " RA=" + rot + "h Dec=" + tilt + "°"
GraphicsWindow.BrushColor = "Black"
GraphicsWindow.FillRectangle(0, 0, gw, gh)
DrawRA()
DrawDec()
DrawStars()
keyDown = "False"
EndIf
Program.Delay(delay)
EndWhile
Sub DrawDec
GraphicsWindow.PenWidth = 1
GraphicsWindow.PenColor = "#666666"
For dec = -80 To 80 Step 10
For ra = 0 To 24 Step 0.2
Mapping()
If 0 < ra Then
DrawLine()
EndIf
xLast = x
yLast = y
zLast = z
EndFor
EndFor
EndSub
Sub DrawRA
GraphicsWindow.PenWidth = 1
GraphicsWindow.PenColor = "#666666"
For ra = 0 To 23
For dec = -90 To 90 Step 5
Mapping()
If -90 < dec Then
DrawLine()
EndIf
xLast = x
yLast = y
zLast = z
EndFor
EndFor
EndSub
Sub DrawCalendar
GraphicsWindow.BrushColor = "White"
If silverlight Then
Program.Delay(msWait)
EndIf
GraphicsWindow.FontSize = 30
txt = Shapes.AddText(months[month])
Shapes.Move(txt, monthX, monthY)
If silverlight Then
Program.Delay(msWait)
EndIf
GraphicsWindow.FontSize = 40
txt = Shapes.AddText(year)
Shapes.Move(txt, monthX, monthY + 30)
sBuf = year + "," + month
Command_GetArgs()
iYear = sArg[1]
if iYear = "" Then
Goto lEnd
Endif
If Math.Remainder(iYear, 4) = 0 And Math.Remainder(iYear, 100) > 0 Or Math.Remainder(iYear, 400) = 0 Then
iDoM[2] = iDoM[2] + 1
Endif
iNoL = Math.Floor((iYear - 1) / 4) - Math.Floor((iYear - 1) / 100) + Math.Floor((iYear - 1) / 400) ' number of leap year
iWoY = Math.Remainder((iYear + iNoL), 7) ' week of year
iMonth = sArg[2]
If iMonth = "" Then
iM0 = 1
iM1 = 12
Else
iM0 = iMonth
iM1 = iMonth
Endif
iDoY = 0 ' days of year
iNoM = 1 ' number of month
For iM = iM0 To iM1
While iNoM < iM
iDoY = iDoY + iDoM[iNoM]
iNoM = iNoM + 1
EndWhile
Cal_DrawMonth()
EndFor
lEnd:
EndSub
Sub DrawLine
visible = "False"
If 0 <= z And 0 <= zLast Then
If 0 <= x And x < gw And 0 <= y And y < gh Then
visible = "True"
ElseIf 0 <= xLast And xLast < gw And 0 <= yLast And yLast < gh Then
visible = "True"
EndIf
EndIf
If visible Then
GraphicsWindow.DrawLine(xLast, yLast, x, y)
EndIf
EndSub
Sub DrawMeteorShower
ra = radiant["RA"]
dec = radiant["Dec"]
Mapping()
rx = x
ry = y
GraphicsWindow.PenWidth = 1
GraphicsWindow.PenColor = "White"
While "True"
Program.Delay(2000)
angle = Math.GetRandomNumber(360)
_a = Math.GetRadians(angle)
r1 = Math.GetRandomNumber(100) + 50
r2 = r1 * 2.5
x1 = rx + r1 * Math.Sin(_a)
y1 = ry - r1 * Math.Cos(_a)
x2 = rx + r2 * Math.Sin(_a)
y2 = ry - r2 * Math.Cos(_a)
meteor = Shapes.AddLine(x1, y1, x2, y2)
For op = 100 To 0 Step -5
Shapes.SetOpacity(meteor, op)
Program.Delay(50)
EndFor
Shapes.Remove(meteor)
EndWhile
EndSub
Sub DrawStars
GraphicsWindow.PenWidth = 1
GraphicsWindow.PenColor = "MidnightBlue"
n = Array.GetItemCount(edge)
index = Array.GetAllIndices(edge)
For i = 1 To n
e = edge[index[i]]
m = Text.GetIndexOf(e, "-")
ra = star[Text.GetSubText(e, 1, m - 1)]["RA"]
dec = star[Text.GetSubText(e, 1, m - 1)]["Dec"]
Mapping()
x1 = x
y1 = y
z1 = z
ra = star[Text.GetSubTextToEnd(e, m + 1)]["RA"]
dec = star[Text.GetSubTextToEnd(e, m + 1)]["Dec"]
Mapping()
x2 = x
y2 = y
z2 = z
If connect[index[i]] <> "" Then
Shapes.Remove(connect[index[i]])
connect[index[i]] = ""
EndIf
visible = "False"
If 0 <= z1 And 0 <= z2 Then
If 0 <= x1 And x1 <= gw And 0 <= y1 And y1 <= gh Then
visible = "True"
ElseIf 0 <= x2 And x2 <= gw And 0 <= y2 And y2 <= gh Then
visible = "True"
EndIf
If visible Then
connect[index[i]] = Shapes.AddLine(x1, y1, x2, y2)
EndIf
EndIf
EndFor
GraphicsWindow.PenWidth = 0
GraphicsWindow.BrushColor = "White"
n = Array.GetItemCount(star)
index = Array.GetAllIndices(star)
For i = 1 To n
ra = star[index[i]]["ra"]
dec = star[index[i]]["dec"]
Mapping()
If ell[index[i]] <> "" Then
Shapes.Remove(ell[index[i]])
ell[index[i]] = ""
EndIf
If 0 <= z Then
mag = star[index[i]]["mag"]
d = 16 / mag
ell[index[i]] = Shapes.AddEllipse(d, d)
Shapes.Move(ell[index[i]], x - d / 2, y - d / 2)
EndIf
EndFor
EndSub
Sub Cal_DrawMonth
' Calendar | Print month
' param iM - month
' param iDoY - days of year
' param iWoY - week of year
If silverlight Then
Program.Delay(msWait)
EndIf
GraphicsWindow.FontSize = 16
GraphicsWindow.FontName = "Consolas"
iW = Math.Remainder((iDoY + iWoY), 7)
line = "SUN MON TUE WED THU FRI SAT" + CRLF
iWoM = 0
While iWoM < iW
line = line + " "
iWoM = iWoM + 1
EndWhile
For iD = 1 To iDoM[iM]
If iD < 10 Then
line = line + " " + iD + " "
Else
line = line + " " + iD + " "
EndIf
If Math.Remainder(iWoM, 7) = 6 Then
line = line + CRLF
EndIf
iWoM = iWoM + 1
EndFor
If Math.Remainder(iWoM, 7) > 0 Then
line = line + CRLF
EndIf
cal = Shapes.AddText(line)
Shapes.Move(cal, calendarX, calendarY)
EndSub
Sub Command_GetArgs
' Command line | Get arguments
' param sBuf - input buffer
' return sArg[] - arguments
' return iN - number of arguments
iP = 1 ' buffer pointer
iN = 1 ' number of args
iC = Text.GetIndexOf(sBuf, ",") ' index of comma
While iC > iP
sArg[iN] = Text.GetSubText(sBuf, iP, iC - iP)
iP = iC + 1
iN = iN + 1
iC = Text.GetIndexOf(sBuf, ",")
EndWhile
iE = Text.GetLength(sBuf) + 1 ' end of buffer
sArg[iN] = Text.GetSubText(sBuf, iP, iE - iP)
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
ElseIf x = 0 Then
a = 0
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 shp - current shape
' param x, y - original coordinate
' param alpha - angle [radian]
' returns x, y - workaround coordinate
If shp["func"] = "tri" Then
x1 = -Math.Floor(shp["x3"] / 2)
y1 = -Math.Floor(shp["y3"] / 2)
ElseIf shp["func"] = "line" Then
x1 = -Math.Floor(Math.Abs(shp["x1"] - shp["x2"]) / 2)
y1 = -Math.Floor(Math.Abs(shp["y1"] - shp["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
shp = shape[i]
GraphicsWindow.PenWidth = shp["pw"] * s
If shp["pw"] > 0 Then
GraphicsWindow.PenColor = shp["pc"]
EndIf
If Text.IsSubText("rect|ell|tri|text", shp["func"]) Then
GraphicsWindow.BrushColor = shp["bc"]
EndIf
If shp["func"] = "rect" Then
shp["obj"] = Shapes.AddRectangle(shp["width"] * s, shp["height"] * s)
ElseIf shp["func"] = "ell" Then
shp["obj"] = Shapes.AddEllipse(shp["width"] * s, shp["height"] * s)
ElseIf shp["func"] = "tri" Then
shp["obj"] = Shapes.AddTriangle(shp["x1"] * s, shp["y1"] * s, shp["x2"] * s, shp["y2"] * s, shp["x3"] * s, shp["y3"] * s)
ElseIf shp["func"] = "line" Then
shp["obj"] = Shapes.AddLine(shp["x1"] * s, shp["y1"] * s, shp["x2"] * s, shp["y2"] * s)
ElseIf shp["func"] = "text" Then
If silverlight Then
fs = Math.Floor(shp["fs"] * 0.9)
Else
fs = shp["fs"]
EndIf
GraphicsWindow.FontSize = fs * s
GraphicsWindow.FontName = shp["fn"]
shp["obj"] = Shapes.AddText(shp["text"])
EndIf
x = shp["x"]
y = shp["y"]
shp["rx"] = x
shp["ry"] = y
If silverlight And Text.IsSubText("tri|line", shp["func"]) Then
alpha = Math.GetRadians(shp["angle"])
SB_RotateWorkaround()
shp["wx"] = x
shp["wy"] = y
EndIf
Shapes.Move(shp["obj"], shX + x * s, shY + y * s)
If Text.IsSubText("rect|ell|tri|text", shp["func"]) And (shp["angle"] <> 0) And (shp["angle"] <> "") Then
Shapes.Rotate(shp["obj"], shp["angle"])
EndIf
shape[i] = shp
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
shp = shape[i]
If shp["func"] = "tri" Or shp["func"] = "line" Then
xmin = shp["x1"]
xmax = shp["x1"]
ymin = shp["y1"]
ymax = shp["y1"]
If shp["x2"] < xmin Then
xmin = shp["x2"]
EndIf
If xmax < shp["x2"] Then
xmax = shp["x2"]
EndIf
If shp["y2"] < ymin Then
ymin = shp["y2"]
EndIf
If ymax < shp["y2"] Then
ymax = shp["y2"]
EndIf
If shp["func"] = "tri" Then
If shp["x3"] < xmin Then
xmin = shp["x3"]
EndIf
If xmax < shp["x3"] Then
xmax = shp["x3"]
EndIf
If shp["y3"] < ymin Then
ymin = shp["y3"]
EndIf
If ymax < shp["y3"] Then
ymax = shp["y3"]
EndIf
EndIf
shp["width"] = xmax - xmin
shp["height"] = ymax - ymin
EndIf
If i = 1 Then
shWidth = shp["x"] + shp["width"]
shHeight = shp["y"] + shp["height"]
Else
If shWidth < shp["x"] + shp["width"] Then
shWidth = shp["x"] + shp["width"]
EndIf
If shHeight < shp["y"] + shp["height"] Then
shHeight = shp["y"] + shp["height"]
EndIf
EndIf
shape[i] = shp
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
shp = shape[i]
If silverlight And Text.IsSubText("tri|line", shp["func"]) Then
_x = shp["wx"]
_y = shp["wy"]
Else
_x = shp["rx"]
_y = shp["ry"]
EndIf
Shapes.Move(shp["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
shp = shape[i]
Shapes.Remove(shp["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 cx, cy - rotation center
' 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
If cx <> "" Then
param["cx"] = cx
Else
cx = "" ' to avoid syntax error
param["cx"] = shWidth / 2
EndIf
If cy <> "" Then
param["cy"] = cy
Else
cy = "" ' to avoid syntax error
param["cy"] = shHeight / 2
EndIf
For i = iMin To iMax
shp = shape[i]
param["x"] = shp["x"]
param["y"] = shp["y"]
param["width"] = shp["width"]
param["height"] = shp["height"]
Shapes_CalcRotatePos()
shp["rx"] = x
shp["ry"] = y
If silverlight And Text.IsSubText("tri|line", shp["func"]) Then
alpha = Math.GetRadians(angle + shp["angle"])
SB_RotateWorkAround()
shp["wx"] = x
shp["wy"] = y
EndIf
Shapes.Move(shp["obj"], shX + x * s, shY + y * s)
Shapes.Rotate(shp["obj"], angle + shp["angle"])
shape[i] = shp
EndFor
y = Stack.PopValue("local")
x = Stack.PopValue("local")
i = Stack.PopValue("local")
EndSub
Program Listing: JWG118-1