bounds_top = 240 * 20
m = ''
- m += swfRecord(9, 255.chr + 155.chr + 155.chr) # Background
+ m += swf_record(9, 255.chr + 155.chr + 155.chr) # Background
absx = 0
absy = 0
xl = yb = 9999999
# - Draw GPS trace lines
- r = startShape
+ r = start_shape
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
+ xl = [xs, xl].min
+ xr = [xs, xr].max
+ yb = [ys, yb].min
+ yt = [ys, yt].max
if row['ts'].to_i - lasttime > 180 || row['fileid'] != lastfile || row['trackid'] != lasttrack # or row['ts'].to_i==lasttime
- b += startAndMove(xs, ys, '01')
- absx = xs.floor; absy = ys.floor
+ b += start_and_move(xs, ys, '01')
+ absx = xs.floor
+ absy = ys.floor
end
- b += drawTo(absx, absy, xs, ys)
- absx = xs.floor; absy = ys.floor
+ b += draw_to(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
- r += [b.slice!(0...80)].pack("B*")
- end
+ r += [b.slice!(0...80)].pack("B*") while b.length > 80
end
# (Unwayed segments removed)
# - Write shape
- b += endShape
+ b += end_shape
r += [b].pack("B*")
- m += swfRecord(2, packUI16(1) + packRect(xl, xr, yb, yt) + r)
- m += swfRecord(4, packUI16(1) + packUI16(1))
+ m += swf_record(2, pack_u16(1) + pack_rect(xl, xr, yb, yt) + r)
+ m += swf_record(4, pack_u16(1) + pack_u16(1))
# - Create Flash header and write to browser
- m += swfRecord(1, '') # Show frame
- m += swfRecord(0, '') # End
+ m += swf_record(1, '') # Show frame
+ m += swf_record(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
+ m = pack_rect(bounds_left, bounds_right, bounds_bottom, bounds_top) + 0.chr + 12.chr + pack_u16(1) + m
+ m = 'FWS' + 6.chr + pack_u32(m.length + 8) + m
render :text => m, :content_type => "application/x-shockwave-flash"
end
# -----------------------------------------------------------------------
# Line-drawing
- def startShape
+ def start_shape
s = 0.chr # No fill styles
s += 2.chr # Two line styles
- s += packUI16(0) + 0.chr + 255.chr + 255.chr # Width 5, RGB #00FFFF
- s += packUI16(0) + 255.chr + 0.chr + 255.chr # Width 5, RGB #FF00FF
+ s += pack_u16(0) + 0.chr + 255.chr + 255.chr # Width 5, RGB #00FFFF
+ s += pack_u16(0) + 255.chr + 0.chr + 255.chr # Width 5, RGB #FF00FF
s += 34.chr # 2 fill, 2 line index bits
s
end
- def endShape
+ def end_shape
'000000'
end
- def startAndMove(x, y, col)
+ def start_and_move(x, y, col)
d = '001001' # Line style change, moveTo
- l = [lengthSB(x), lengthSB(y)].max
+ l = [length_sb(x), length_sb(y)].max
d += sprintf("%05b%0#{l}b%0#{l}b", l, x, y)
d += col # Select line style
d
end
- def drawTo(absx, absy, x, y)
+ def draw_to(absx, absy, x, y)
dx = x - absx
dy = y - absy
ystep = dy / mstep
d = ''
1.upto(mstep).each do
- d += drawSection(x, y, x + xstep, y + ystep)
+ d += draw_section(x, y, x + xstep, y + ystep)
x += xstep
y += ystep
end
d
end
- def drawSection(x1, y1, x2, y2)
+ def draw_section(x1, y1, x2, y2)
d = '11' # TypeFlag, EdgeFlag
dx = x2 - x1
dy = y2 - y1
- l = [lengthSB(dx), lengthSB(dy)].max
+ l = [length_sb(dx), length_sb(dy)].max
d += sprintf("%04b", l - 2)
d += '1' # GeneralLine
d += sprintf("%0#{l}b%0#{l}b", dx, dy)
# SWF data block type
- def swfRecord(id, r)
+ def swf_record(id, r)
if r.length > 62
# Long header: tag id, 0x3F, length
- return packUI16((id << 6) + 0x3F) + packUI32(r.length) + r
+ return pack_u16((id << 6) + 0x3F) + pack_u32(r.length) + r
else
# Short header: tag id, length
- return packUI16((id << 6) + r.length) + r
+ return pack_u16((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
+ def pack_rect(a, b, c, d)
+ l = [length_sb(a),
+ length_sb(b),
+ length_sb(c),
+ length_sb(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
# -----------------------------------------------------------------------
# Generic pack functions
- def packUI16(n)
+ def pack_u16(n)
[n.floor].pack("v")
end
- def packUI32(n)
+ def pack_u32(n)
[n.floor].pack("V")
end
# Find number of bits required to store arbitrary-length binary
- def lengthSB(n)
+ def length_sb(n)
Math.frexp(n + (n == 0 ? 1 : 0))[1] + 1
end
projects / rails.git / blobdiff