1 class SwfController < ApplicationController
4 # RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}")
5 # $log.puts Time.new.to_s+','+Time.new.usec.to_s+": started GPS script"
6 # http://localhost:3000/api/0.4/swf/trackpoints?xmin=-2.32402605810577&xmax=-2.18386309423859&ymin=52.1546608755772&ymax=52.2272777906895&baselong=-2.25325793066437&basey=61.3948537948532&masterscale=5825.4222222222
8 # ====================================================================
11 # ---- trackpoints compile SWF of trackpoints
17 baselong =params['baselong'].to_f
18 basey =params['basey'].to_f
19 masterscale =params['masterscale'].to_f
21 xmin=params['xmin'].to_f/0.000001
22 xmax=params['xmax'].to_f/0.000001
23 ymin=params['ymin'].to_f/0.000001
24 ymax=params['ymax'].to_f/0.000001
34 m+=swfRecord(9,255.chr + 155.chr + 155.chr) #ÃBackground
40 # - Send SQL and draw line
47 token=sqlescape(params['token'])
48 sql="SELECT gps_points.latitude*0.000001 AS lat,gps_points.longitude*0.000001 AS lon,gpx_files.id AS fileid,UNIX_TIMESTAMP(gps_points.timestamp) AS ts "+
49 " FROM gpx_files,gps_points,users "+
50 "WHERE gpx_files.id=gpx_id "+
51 " AND gpx_files.user_id=users.id "+
52 " AND token='#{token}' "+
53 " AND (gps_points.longitude BETWEEN #{xmin} AND #{xmax}) "+
54 " AND (gps_points.latitude BETWEEN #{ymin} AND #{ymax}) "+
55 " AND (gps_points.timestamp IS NOT NULL) "+
56 "ORDER BY fileid DESC,ts "+
59 sql="SELECT latitude*0.000001 AS lat,longitude*0.000001 AS lon,gpx_id AS fileid,UNIX_TIMESTAMP(timestamp) AS ts "+
61 "WHERE (longitude BETWEEN #{xmin} AND #{xmax}) "+
62 " AND (latitude BETWEEN #{ymin} AND #{ymax}) "+
63 " AND (gps_points.timestamp IS NOT NULL) "+
64 "ORDER BY fileid DESC,ts "+
67 gpslist=ActiveRecord::Base.connection.select_all sql
73 xs=(long2coord(row['lon'].to_f,baselong,masterscale)*20).floor
74 ys=(lat2coord(row['lat'].to_f ,basey ,masterscale)*20).floor
75 xl=[xs,xl].min; xr=[xs,xr].max
76 yb=[ys,yb].min; yt=[ys,yt].max
77 if (row['ts'].to_i-lasttime<180 and row['fileid']==lastfile)
78 b+=drawTo(absx,absy,xs,ys)
80 b+=startAndMove(xs,ys)
82 absx=xs.floor; absy=ys.floor
83 lasttime=row['ts'].to_i
84 lastfile=row['fileid']
86 r+=[b.slice!(0...80)].pack("B*")
94 m+=swfRecord(2,packUI16(1) + packRect(xl,xr,yb,yt) + r)
95 m+=swfRecord(4,packUI16(1) + packUI16(1))
97 # - Create Flash header and write to browser
99 m+=swfRecord(1,'') # Show frame
100 m+=swfRecord(0,'') # End
102 m=packRect(bounds_left,bounds_right,bounds_bottom,bounds_top) + 0.chr + 12.chr + packUI16(1) + m
103 m='FWS' + 6.chr + packUI32(m.length+8) + m
105 response.headers["Content-Type"]="application/x-shockwave-flash"
111 # =======================================================================
114 # -----------------------------------------------------------------------
118 s =0.chr # No fill styles
119 s+=1.chr # One line style
120 s+=packUI16(5) + 0.chr + 255.chr + 255.chr # Width 5, RGB #00FFFF
121 s+=17.chr # 1 fill, 1 line index bit
129 def startAndMove(x,y)
130 d='001001' # Line style change, moveTo
131 l =[lengthSB(x),lengthSB(y)].max
132 d+=sprintf("%05b%0#{l}b%0#{l}b",l,x,y)
133 d+='1' # Select line style 1
136 def drawTo(absx,absy,x,y)
137 d='11' # TypeFlag, EdgeFlag
141 l =[lengthSB(dx),lengthSB(dy)].max
142 d+=sprintf("%04b",l-2)
144 d+=sprintf("%0#{l}b%0#{l}b",dx,dy)
147 # -----------------------------------------------------------------------
148 # Specific data types
152 return packUI16((id<<6)+0x3F) + packUI32(r.length) + r
154 return packUI16((id<<6)+r.length) + r
158 def packRect(a,b,c,d)
163 n=sprintf("%05b%0#{l}b%0#{l}b%0#{l}b%0#{l}b",l,a,b,c,d)
167 # -----------------------------------------------------------------------
168 # Generic pack functions
178 # Find number of bits required to store arbitrary-length binary
181 Math.frexp(n+ (n==0?1:0) )[1]+1
184 # ====================================================================
185 # Co-ordinate conversion
186 # (this is duplicated from amf_controller, should probably share)
188 def lat2coord(a,basey,masterscale)
189 -(lat2y(a)-basey)*masterscale+250
192 def long2coord(a,baselong,masterscale)
193 (a-baselong)*masterscale+350
197 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
201 a.gsub("'","''").gsub(92.chr,92.chr+92.chr)