1 class SwfController < ApplicationController
3 before_filter :check_availability
6 # RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}")
7 # $log.puts Time.new.to_s+','+Time.new.usec.to_s+": started GPS script"
8 # 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
10 # ====================================================================
13 # ---- trackpoints compile SWF of trackpoints
19 baselong =params['baselong'].to_f
20 basey =params['basey'].to_f
21 masterscale =params['masterscale'].to_f
23 xmin=params['xmin'].to_f; xminr=xmin/0.000001
24 xmax=params['xmax'].to_f; xmaxr=xmax/0.000001
25 ymin=params['ymin'].to_f; yminr=ymin/0.000001
26 ymax=params['ymax'].to_f; ymaxr=ymax/0.000001
36 m+=swfRecord(9,255.chr + 155.chr + 155.chr) #ÃBackground
42 # - Send SQL for GPS tracks
49 token=sqlescape(params['token'])
50 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 "+
51 " FROM gpx_files,gps_points,users "+
52 "WHERE gpx_files.id=gpx_id "+
53 " AND gpx_files.user_id=users.id "+
54 " AND token='#{token}' "+
55 " AND (gps_points.longitude BETWEEN #{xminr} AND #{xmaxr}) "+
56 " AND (gps_points.latitude BETWEEN #{yminr} AND #{ymaxr}) "+
57 " AND (gps_points.timestamp IS NOT NULL) "+
58 "ORDER BY fileid DESC,ts "+
61 sql="SELECT latitude*0.000001 AS lat,longitude*0.000001 AS lon,gpx_id AS fileid,UNIX_TIMESTAMP(timestamp) AS ts "+
63 "WHERE (longitude BETWEEN #{xminr} AND #{xmaxr}) "+
64 " AND (latitude BETWEEN #{yminr} AND #{ymaxr}) "+
65 " AND (gps_points.timestamp IS NOT NULL) "+
66 "ORDER BY fileid DESC,ts "+
69 gpslist=ActiveRecord::Base.connection.select_all sql
71 # - Draw GPS trace lines
75 xs=(long2coord(row['lon'].to_f,baselong,masterscale)*20).floor
76 ys=(lat2coord(row['lat'].to_f ,basey ,masterscale)*20).floor
77 xl=[xs,xl].min; xr=[xs,xr].max
78 yb=[ys,yb].min; yt=[ys,yt].max
79 if (row['ts'].to_i-lasttime<180 and row['fileid']==lastfile)
80 b+=drawTo(absx,absy,xs,ys)
82 b+=startAndMove(xs,ys,'01')
84 absx=xs.floor; absy=ys.floor
85 lasttime=row['ts'].to_i
86 lastfile=row['fileid']
88 r+=[b.slice!(0...80)].pack("B*")
92 # - Draw unwayed segments
94 if params['unwayed']=='true'
95 sql="SELECT cn1.latitude AS lat1,cn1.longitude AS lon1,"+
96 " cn2.latitude AS lat2,cn2.longitude AS lon2 "+
97 " FROM current_segments "+
98 " LEFT OUTER JOIN current_way_segments"+
99 " ON segment_id=current_segments.id,"+
100 " current_nodes AS cn1,current_nodes AS cn2"+
101 " WHERE (cn1.longitude BETWEEN #{xmin} AND #{xmax})"+
102 " AND (cn1.latitude BETWEEN #{ymin} AND #{ymax})"+
103 " AND segment_id IS NULL"+
104 " AND current_segments.visible=1"+
105 " AND cn1.id=node_a AND cn1.visible=1"+
106 " AND cn2.id=node_b AND cn2.visible=1"
107 seglist=ActiveRecord::Base.connection.select_all sql
109 seglist.each do |row|
110 xs1=(long2coord(row['lon1'].to_f,baselong,masterscale)*20).floor; ys1=(lat2coord(row['lat1'].to_f,basey,masterscale)*20).floor
111 xs2=(long2coord(row['lon2'].to_f,baselong,masterscale)*20).floor; ys2=(lat2coord(row['lat2'].to_f,basey,masterscale)*20).floor
112 if (xs1==absx and ys1==absy)
113 b+=drawTo(absx,absy,xs2,ys2)
115 elsif (xs2==absx and ys2==absy)
116 b+=drawTo(absx,absy,xs1,ys1)
119 b+=startAndMove(xs1,ys1,'10')
120 b+=drawTo(xs1,ys1,xs2,ys2)
124 r+=[b.slice!(0...80)].pack("B*")
133 m+=swfRecord(2,packUI16(1) + packRect(xl,xr,yb,yt) + r)
134 m+=swfRecord(4,packUI16(1) + packUI16(1))
136 # - Create Flash header and write to browser
138 m+=swfRecord(1,'') # Show frame
139 m+=swfRecord(0,'') # End
141 m=packRect(bounds_left,bounds_right,bounds_bottom,bounds_top) + 0.chr + 12.chr + packUI16(1) + m
142 m='FWS' + 6.chr + packUI32(m.length+8) + m
144 render :text => m, :content_type => "application/x-shockwave-flash"
149 # =======================================================================
152 # -----------------------------------------------------------------------
156 s =0.chr # No fill styles
157 s+=2.chr # Two line styles
158 s+=packUI16(5) + 0.chr + 255.chr + 255.chr # Width 5, RGB #00FFFF
159 s+=packUI16(5) + 255.chr + 0.chr + 255.chr # Width 5, RGB #FF00FF
160 s+=34.chr # 2 fill, 2 line index bits
168 def startAndMove(x,y,col)
169 d='001001' # Line style change, moveTo
170 l =[lengthSB(x),lengthSB(y)].max
171 d+=sprintf("%05b%0#{l}b%0#{l}b",l,x,y)
172 d+=col # Select line style
175 def drawTo(absx,absy,x,y)
176 d='11' # TypeFlag, EdgeFlag
180 l =[lengthSB(dx),lengthSB(dy)].max
181 d+=sprintf("%04b",l-2)
183 d+=sprintf("%0#{l}b%0#{l}b",dx,dy)
186 # -----------------------------------------------------------------------
187 # Specific data types
191 return packUI16((id<<6)+0x3F) + packUI32(r.length) + r
193 return packUI16((id<<6)+r.length) + r
197 def packRect(a,b,c,d)
202 n=sprintf("%05b%0#{l}b%0#{l}b%0#{l}b%0#{l}b",l,a,b,c,d)
206 # -----------------------------------------------------------------------
207 # Generic pack functions
217 # Find number of bits required to store arbitrary-length binary
220 Math.frexp(n+ (n==0?1:0) )[1]+1
223 # ====================================================================
224 # Co-ordinate conversion
225 # (this is duplicated from amf_controller, should probably share)
227 def lat2coord(a,basey,masterscale)
228 -(lat2y(a)-basey)*masterscale+250
231 def long2coord(a,baselong,masterscale)
232 (a-baselong)*masterscale+350
236 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
240 a.gsub("'","''").gsub(92.chr,92.chr+92.chr)