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;
24 xmax=params['xmax'].to_f;
25 ymin=params['ymin'].to_f;
26 ymax=params['ymax'].to_f;
36 m+=swfRecord(9,255.chr + 155.chr + 155.chr) #ÃBackground
42 # - Send SQL for GPS tracks
49 user=User.authenticate(:token => 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 "+
52 "WHERE gpx_files.id=gpx_id "+
53 " AND gpx_files.user_id=#{user.id} "+
54 " AND "+OSM.sql_for_area(ymin,xmin,ymax,xmax,"gps_points.")+
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 "+OSM.sql_for_area(ymin,xmin,ymax,xmax,"gps_points.")+
62 " AND (gps_points.timestamp IS NOT NULL) "+
63 "ORDER BY fileid DESC,ts "+
66 gpslist=ActiveRecord::Base.connection.select_all sql
68 # - Draw GPS trace lines
72 xs=(long2coord(row['lon'].to_f,baselong,masterscale)*20).floor
73 ys=(lat2coord(row['lat'].to_f ,basey ,masterscale)*20).floor
74 xl=[xs,xl].min; xr=[xs,xr].max
75 yb=[ys,yb].min; yt=[ys,yt].max
76 if (row['ts'].to_i-lasttime<180 and row['fileid']==lastfile)
77 b+=drawTo(absx,absy,xs,ys)
79 b+=startAndMove(xs,ys,'01')
81 absx=xs.floor; absy=ys.floor
82 lasttime=row['ts'].to_i
83 lastfile=row['fileid']
85 r+=[b.slice!(0...80)].pack("B*")
89 # - Draw unwayed segments
91 if params['unwayed']=='true'
92 sql="SELECT cn1.latitude AS lat1,cn1.longitude AS lon1,"+
93 " cn2.latitude AS lat2,cn2.longitude AS lon2 "+
94 " FROM current_segments "+
95 " LEFT OUTER JOIN current_way_segments"+
96 " ON segment_id=current_segments.id,"+
97 " current_nodes AS cn1,current_nodes AS cn2"+
98 " WHERE (cn1.longitude BETWEEN #{xmin} AND #{xmax})"+
99 " AND (cn1.latitude BETWEEN #{ymin} AND #{ymax})"+
100 " AND segment_id IS NULL"+
101 " AND current_segments.visible=1"+
102 " AND cn1.id=node_a AND cn1.visible=1"+
103 " AND cn2.id=node_b AND cn2.visible=1"
104 seglist=ActiveRecord::Base.connection.select_all sql
106 seglist.each do |row|
107 xs1=(long2coord(row['lon1'].to_f,baselong,masterscale)*20).floor; ys1=(lat2coord(row['lat1'].to_f,basey,masterscale)*20).floor
108 xs2=(long2coord(row['lon2'].to_f,baselong,masterscale)*20).floor; ys2=(lat2coord(row['lat2'].to_f,basey,masterscale)*20).floor
109 if (xs1==absx and ys1==absy)
110 b+=drawTo(absx,absy,xs2,ys2)
112 elsif (xs2==absx and ys2==absy)
113 b+=drawTo(absx,absy,xs1,ys1)
116 b+=startAndMove(xs1,ys1,'10')
117 b+=drawTo(xs1,ys1,xs2,ys2)
121 r+=[b.slice!(0...80)].pack("B*")
130 m+=swfRecord(2,packUI16(1) + packRect(xl,xr,yb,yt) + r)
131 m+=swfRecord(4,packUI16(1) + packUI16(1))
133 # - Create Flash header and write to browser
135 m+=swfRecord(1,'') # Show frame
136 m+=swfRecord(0,'') # End
138 m=packRect(bounds_left,bounds_right,bounds_bottom,bounds_top) + 0.chr + 12.chr + packUI16(1) + m
139 m='FWS' + 6.chr + packUI32(m.length+8) + m
141 render :text => m, :content_type => "application/x-shockwave-flash"
146 # =======================================================================
149 # -----------------------------------------------------------------------
153 s =0.chr # No fill styles
154 s+=2.chr # Two line styles
155 s+=packUI16(5) + 0.chr + 255.chr + 255.chr # Width 5, RGB #00FFFF
156 s+=packUI16(5) + 255.chr + 0.chr + 255.chr # Width 5, RGB #FF00FF
157 s+=34.chr # 2 fill, 2 line index bits
165 def startAndMove(x,y,col)
166 d='001001' # Line style change, moveTo
167 l =[lengthSB(x),lengthSB(y)].max
168 d+=sprintf("%05b%0#{l}b%0#{l}b",l,x,y)
169 d+=col # Select line style
172 def drawTo(absx,absy,x,y)
173 d='11' # TypeFlag, EdgeFlag
177 l =[lengthSB(dx),lengthSB(dy)].max
178 d+=sprintf("%04b",l-2)
180 d+=sprintf("%0#{l}b%0#{l}b",dx,dy)
183 # -----------------------------------------------------------------------
184 # Specific data types
188 return packUI16((id<<6)+0x3F) + packUI32(r.length) + r
190 return packUI16((id<<6)+r.length) + r
194 def packRect(a,b,c,d)
199 n=sprintf("%05b%0#{l}b%0#{l}b%0#{l}b%0#{l}b",l,a,b,c,d)
203 # -----------------------------------------------------------------------
204 # Generic pack functions
214 # Find number of bits required to store arbitrary-length binary
217 Math.frexp(n+ (n==0?1:0) )[1]+1
220 # ====================================================================
221 # Co-ordinate conversion
222 # (this is duplicated from amf_controller, should probably share)
224 def lat2coord(a,basey,masterscale)
225 -(lat2y(a)-basey)*masterscale+250
228 def long2coord(a,baselong,masterscale)
229 (a-baselong)*masterscale+350
233 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
237 a.gsub("'","''").gsub(92.chr,92.chr+92.chr)