- session :off
- before_filter :check_availability
-
-# to log:
-# RAILS_DEFAULT_LOGGER.error("Args: #{args[0]}, #{args[1]}, #{args[2]}, #{args[3]}")
-# $log.puts Time.new.to_s+','+Time.new.usec.to_s+": started GPS script"
-# 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
-
- # ====================================================================
- # Public methods
-
- # ---- trackpoints compile SWF of trackpoints
-
- def trackpoints
-
- # - Initialise
-
- baselong =params['baselong'].to_f
- basey =params['basey'].to_f
- masterscale =params['masterscale'].to_f
-
- xmin=params['xmin'].to_f;
- xmax=params['xmax'].to_f;
- ymin=params['ymin'].to_f;
- ymax=params['ymax'].to_f;
-
- # - Begin movie
-
- bounds_left =0
- bounds_right =320*20
- bounds_bottom=0
- bounds_top =240*20
-
- m =''
- m+=swfRecord(9,255.chr + 155.chr + 155.chr) #ÃBackground
- absx=0
- absy=0
- xl=yb= 9999999
- xr=yt=-9999999
-
- # - Send SQL for GPS tracks
-
- b=''
- lasttime=0
- lastfile='-1'
-
- if params['token']
- user=User.authenticate(:token => params[:token])
- sql="SELECT gps_points.latitude*0.0000001 AS lat,gps_points.longitude*0.0000001 AS lon,gpx_files.id AS fileid,UNIX_TIMESTAMP(gps_points.timestamp) AS ts "+
- " FROM gpx_files,gps_points "+
- "WHERE gpx_files.id=gpx_id "+
- " AND gpx_files.user_id=#{user.id} "+
- " AND "+OSM.sql_for_area(ymin,xmin,ymax,xmax,"gps_points.")+
- " AND (gps_points.timestamp IS NOT NULL) "+
- "ORDER BY fileid DESC,ts "+
- "LIMIT 10000"
- else
- sql="SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,gpx_id AS fileid,UNIX_TIMESTAMP(timestamp) AS ts "+
- " FROM gps_points "+
- "WHERE "+OSM.sql_for_area(ymin,xmin,ymax,xmax,"gps_points.")+
- " AND (gps_points.timestamp IS NOT NULL) "+
- "ORDER BY fileid DESC,ts "+
- "LIMIT 10000"
- end
- gpslist=ActiveRecord::Base.connection.select_all sql
-
- # - Draw GPS trace lines
-
- r=startShape()
- gpslist.each do |row|
- xs=(long2coord(row['lon'].to_f,baselong,masterscale)*20).floor
- ys=(lat2coord(row['lat'].to_f ,basey ,masterscale)*20).floor
- xl=[xs,xl].min; xr=[xs,xr].max
- yb=[ys,yb].min; yt=[ys,yt].max
- if (row['ts'].to_i-lasttime<180 and row['fileid']==lastfile)
- b+=drawTo(absx,absy,xs,ys)
- else
- b+=startAndMove(xs,ys,'01')
- end
- absx=xs.floor; absy=ys.floor
- lasttime=row['ts'].to_i
- lastfile=row['fileid']
- while b.length>80 do
- r+=[b.slice!(0...80)].pack("B*")
- end
- end
-
- # - Draw unwayed segments
-
- if params['unwayed']=='true'
- sql="SELECT cn1.latitude AS lat1,cn1.longitude AS lon1,"+
- " cn2.latitude AS lat2,cn2.longitude AS lon2 "+
- " FROM current_segments "+
- " LEFT OUTER JOIN current_way_segments"+
- " ON segment_id=current_segments.id,"+
- " current_nodes AS cn1,current_nodes AS cn2"+
- " WHERE (cn1.longitude BETWEEN #{xmin} AND #{xmax})"+
- " AND (cn1.latitude BETWEEN #{ymin} AND #{ymax})"+
- " AND segment_id IS NULL"+
- " AND current_segments.visible=1"+
- " AND cn1.id=node_a AND cn1.visible=1"+
- " AND cn2.id=node_b AND cn2.visible=1"
- seglist=ActiveRecord::Base.connection.select_all sql
-
- seglist.each do |row|
- xs1=(long2coord(row['lon1'].to_f,baselong,masterscale)*20).floor; ys1=(lat2coord(row['lat1'].to_f,basey,masterscale)*20).floor
- xs2=(long2coord(row['lon2'].to_f,baselong,masterscale)*20).floor; ys2=(lat2coord(row['lat2'].to_f,basey,masterscale)*20).floor
- if (xs1==absx and ys1==absy)
- b+=drawTo(absx,absy,xs2,ys2)
- absx=xs2; absy=ys2
- elsif (xs2==absx and ys2==absy)
- b+=drawTo(absx,absy,xs1,ys1)
- absx=xs1; absy=ys1
- else
- b+=startAndMove(xs1,ys1,'10')
- b+=drawTo(xs1,ys1,xs2,ys2)
- absx=xs2; absy=ys2
- end
- while b.length>80 do
- r+=[b.slice!(0...80)].pack("B*")
- end
- end
- end
-
- # - Write shape
-
- b+=endShape()
- r+=[b].pack("B*")
- m+=swfRecord(2,packUI16(1) + packRect(xl,xr,yb,yt) + r)
- m+=swfRecord(4,packUI16(1) + packUI16(1))
-
- # - Create Flash header and write to browser
-
- m+=swfRecord(1,'') # Show frame
- m+=swfRecord(0,'') # End
-
- m=packRect(bounds_left,bounds_right,bounds_bottom,bounds_top) + 0.chr + 12.chr + packUI16(1) + m
- m='FWS' + 6.chr + packUI32(m.length+8) + m
-
- render :text => m, :content_type => "application/x-shockwave-flash"
- end
-
- private
-
- # =======================================================================
- # SWF functions
-
- # -----------------------------------------------------------------------
- # Line-drawing
-
- def startShape
- s =0.chr # No fill styles
- s+=2.chr # Two line styles
- s+=packUI16(5) + 0.chr + 255.chr + 255.chr # Width 5, RGB #00FFFF
- s+=packUI16(5) + 255.chr + 0.chr + 255.chr # Width 5, RGB #FF00FF
- s+=34.chr # 2 fill, 2 line index bits
- s
- end
-
- def endShape
- '000000'
- end
-
- def startAndMove(x,y,col)
- d='001001' # Line style change, moveTo
- l =[lengthSB(x),lengthSB(y)].max
- d+=sprintf("%05b%0#{l}b%0#{l}b",l,x,y)
- d+=col # Select line style
- end
-
- def drawTo(absx,absy,x,y)
- d='11' # TypeFlag, EdgeFlag
- dx=x-absx
- dy=y-absy
-
- l =[lengthSB(dx),lengthSB(dy)].max
- d+=sprintf("%04b",l-2)
- d+='1' # GeneralLine
- d+=sprintf("%0#{l}b%0#{l}b",dx,dy)
- end
-
- # -----------------------------------------------------------------------
- # Specific data types
-
- def swfRecord(id,r)
- if r.length>62
- return packUI16((id<<6)+0x3F) + packUI32(r.length) + r
- else
- return packUI16((id<<6)+r.length) + r
- end
- end
-
- def packRect(a,b,c,d)
- l=[lengthSB(a),
- lengthSB(b),
- lengthSB(c),
- lengthSB(d)].max
- n=sprintf("%05b%0#{l}b%0#{l}b%0#{l}b%0#{l}b",l,a,b,c,d)
- [n].pack("B*")
- end
-
- # -----------------------------------------------------------------------
- # Generic pack functions
-
- def packUI16(n)
- [n.floor].pack("v")
- end
-
- def packUI32(n)
- [n.floor].pack("V")
- end
-
- # Find number of bits required to store arbitrary-length binary
-
- def lengthSB(n)
- Math.frexp(n+ (n==0?1:0) )[1]+1
- end
-
- # ====================================================================
- # Co-ordinate conversion
- # (this is duplicated from amf_controller, should probably share)
-
- def lat2coord(a,basey,masterscale)
- -(lat2y(a)-basey)*masterscale+250
- end
-
- def long2coord(a,baselong,masterscale)
- (a-baselong)*masterscale+350
- end
-
- def lat2y(a)
- 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
- end
-
- def sqlescape(a)
- a.gsub("'","''").gsub(92.chr,92.chr+92.chr)
- end
projects / rails.git / blobdiff