class SwfController < ApplicationController
- session :off
+ skip_before_filter :verify_authenticity_token
before_filter :check_api_readable
# to log:
# $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
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;
+ bbox = BoundingBox.new(params['xmin'], params['ymin'],
+ params['xmax'], params['ymax'])
+ start=params['start'].to_i;
# - Begin movie
b=''
lasttime=0
- lastfile='-1'
+ lasttrack=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,EXTRACT(EPOCH FROM gps_points.timestamp) AS ts "+
+ sql="SELECT gps_points.latitude*0.0000001 AS lat,gps_points.longitude*0.0000001 AS lon,gpx_files.id AS fileid,"+
+ " EXTRACT(EPOCH FROM gps_points.timestamp) AS ts, gps_points.trackid AS trackid "+
" 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 "+OSM.sql_for_area(bbox,"gps_points.")+
" AND (gps_points.timestamp IS NOT NULL) "+
"ORDER BY fileid DESC,ts "+
- "LIMIT 10000"
+ "LIMIT 10000 OFFSET #{start}"
else
- sql="SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,gpx_id AS fileid,EXTRACT(EPOCH FROM timestamp) AS ts "+
+ sql="SELECT latitude*0.0000001 AS lat,longitude*0.0000001 AS lon,gpx_id AS fileid,"+
+ " EXTRACT(EPOCH FROM timestamp) AS ts, gps_points.trackid AS trackid "+
" FROM gps_points "+
- "WHERE "+OSM.sql_for_area(ymin,xmin,ymax,xmax,"gps_points.")+
+ "WHERE "+OSM.sql_for_area(bbox,"gps_points.")+
" AND (gps_points.timestamp IS NOT NULL) "+
"ORDER BY fileid DESC,ts "+
- "LIMIT 10000"
+ "LIMIT 10000 OFFSET #{start}"
end
gpslist=ActiveRecord::Base.connection.select_all sql
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 and row['ts'].to_i!=lasttime)
- b+=drawTo(absx,absy,xs,ys)
- else
- b+=startAndMove(xs,ys,'01')
- end
+ if row['ts'].to_i-lasttime>180 or row['fileid']!=lastfile or row['trackid']!=lasttrack #or row['ts'].to_i==lasttime
+ b+=startAndMove(xs,ys,'01')
+ absx=xs.floor; absy=ys.floor
+ end
+ b+=drawTo(absx,absy,xs,ys)
absx=xs.floor; absy=ys.floor
lasttime=row['ts'].to_i
lastfile=row['fileid']
+ lasttrack=row['trackid']
while b.length>80 do
r+=[b.slice!(0...80)].pack("B*")
end
end
def drawTo(absx,absy,x,y)
- d='11' # TypeFlag, EdgeFlag
dx=x-absx
dy=y-absy
-
+
+ # Split the line up if there's anything>16383, because
+ # that would overflow the 4 bits allowed for length
+ mstep=[dx.abs/16383,dy.abs/16383,1].max.ceil
+ xstep=dx/mstep
+ ystep=dy/mstep
+ d=''
+ for i in (1..mstep)
+ d+=drawSection(x,y,x+xstep,y+ystep)
+ x+=xstep
+ y+=ystep
+ end
+ d
+ end
+
+ def drawSection(x1,y1,x2,y2)
+ d='11' # TypeFlag, EdgeFlag
+ dx=x2-x1
+ dy=y2-y1
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
+ end
# -----------------------------------------------------------------------
# Specific data types
+ # SWF data block type
+
def swfRecord(id,r)
if r.length>62
+ # Long header: tag id, 0x3F, length
return packUI16((id<<6)+0x3F) + packUI32(r.length) + r
else
+ # Short header: tag id, length
return packUI16((id<<6)+r.length) + r
end
end
+ # SWF RECT type
+
def packRect(a,b,c,d)
l=[lengthSB(a),
lengthSB(b),
lengthSB(c),
lengthSB(d)].max
+ # create binary string (00111001 etc.) - 5-byte length, then bbox
n=sprintf("%05b%0#{l}b%0#{l}b%0#{l}b%0#{l}b",l,a,b,c,d)
+ # pack into byte string
[n].pack("B*")
end
projects / rails.git / blobdiff