Class: ImageMap

Inherits:
CArray show all
Defined in:
ext/imagemap/lib/graphics/imagemap.rb

Overview

CArray#index_linear(scale) CArray#index_log10(scale)

ImageMap.create_image_map_linear(idx, n, palette, mask_color) ImageMap.create_image_map_log10(idx, n, palette, mask_color)

Constant Summary

Constants inherited from CArray

CArray::HAVE_NARRAY

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from CArray

#<=>, __new__, __new_fixlen__, #address, #anomaly, #asign, #attribute, #attribute=, #bin, bind, #block_iterator, #by, #classes, #classify, #code, combine, #compact, #compacted, composite, #correlation, #count_masked, #count_not_masked, #covariance, #covariancep, #deg_180, #deg_180!, #deg_360, #deg_360!, #delete_block, #differentiate, #display_by_magick, dump, #duplicated_values, #escape_bytea, #extend_as_table, #fa, #false, #first, #flatten, #flattened, from_binary, #from_bit_string, from_bit_string, from_csv, from_fortran_format, #has_attribute?, #imag, #imag=, #index, #indices, #insert_block, #inspect, #integrate, #interp_nd_linear, #interpolate, #interpolate2, #is_close, #is_divisible, #is_equiv, #is_not_divisible, #is_real, join, #join, #last, load, load_binary, load_binary_io, load_by_magick, load_csv, load_from_file, load_pg, load_sqlite3, #map, #marshal_dump, #marshal_load, #maskout, #maskout!, #matchup, #matchup_nearest, #max_by, #median, merge, #min_by, #na, #nm, #normalize, #normalize!, #nv, #order, pack, #percentile, pickup, #pull, #pulled, #quantile, #quo, #rad_2pi, #rad_2pi!, #rad_pi, #rad_pi!, #random, #randomn, #randomn!, #range, #real, #real=, #real?, #recurrence, #recurrence!, #replace, #reshape, #resize, #reversed, #roll, #roll!, #rolled, #rotate, #rotate!, #rotated, save, #save_binary, #save_binary_io, #save_by_magick, #save_csv, #scale, #scale!, #section, #select, #shift, #shift!, #sign, #solve, #solve2, #sort_by, #sorted_by, span, #span, #span!, #split, #st, summation, #to_binary, #to_bit_string, #to_column, #to_csv, #to_fortran_format, #to_na, #to_na!, #to_nam, #to_nam!, #to_nm, #to_nm!, #to_nv, #to_nv!, #to_row, #to_sqlite3, #to_tabular, #transform, #transpose, #transpose!, #true, #unblob, #unescape_bytea, #uniq, #where_range, #window_iterator, #windows, #zimg

Constructor Details

#initialize(*argv) ⇒ ImageMap

Returns a new instance of ImageMap.



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 189

def initialize (*argv)
  super
  @yscale  = 1
  @xscale  = 1
  @yoffset = 0
  @xoffset = 0
end

Instance Attribute Details

#xoffset ⇒ Object

Returns the value of attribute xoffset.



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 197

def xoffset
  @xoffset
end

#xscale ⇒ Object

Returns the value of attribute xscale.



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 197

def xscale
  @xscale
end

#yoffset ⇒ Object

Returns the value of attribute yoffset.



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 197

def yoffset
  @yoffset
end

#yscale ⇒ Object

Returns the value of attribute yscale.



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 197

def yscale
  @yscale
end

Instance Method Details

#line(x0, y0, x1, y1, z) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 25

def line (x0, y0, x1, y1, z)
  x0 = (x0 - @xoffset)*@xscale
  y0 = (y0 - @yoffset)*@yscale
  x1 = (x1 - @xoffset)*@xscale
  y1 = (y1 - @yoffset)*@yscale
  draw_line(y0, x0, y1, x1, z)
end

#map_points(pw, pu, pv) {|pu, pv, gx, gy| ... } ⇒ Object

Yields:

  • (pu, pv, gx, gy) 


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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 39

def map_points (pw, pu, pv)
  lines, pixels = pw.dim0, pw.dim1
  gx = CArray.float(lines, pixels)
  gy = CArray.float(lines, pixels)
  yield(pu,pv,gx,gy)
  gx.sub!(@xoffset).mul!(@xscale)
  gy.sub!(@yoffset).mul!(@yscale)
  draw_points(gy, gx, pw)
end

#polyline(x, y, z) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 33

def polyline (x, y, z)
  x = (x - @xoffset).mul!(@xscale)
  y = (y - @xoffset).mul!(@xscale)
  draw_polyline(y, x, z)
end

#set_xrange(rng) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 199

def set_xrange (rng)
  first = rng.begin
  last  = rng.end
  if rng.exclude_end?
    @xscale = (dim1-1).to_f/(last-first).to_f
  else
    @xscale = dim1.to_f/(last-first).to_f
  end
  @xoffset = first
end

#set_yrange(rng) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 210

def set_yrange (rng)
  first = rng.begin
  last  = rng.end
  if rng.exclude_end?
    @yscale = (dim0-1).to_f/(first-last).to_f
    @yoffset = last - @yscale
  else
    @yscale = dim0.to_f/(first-last).to_f
    @yoffset = last
  end
end

#tfw(metric = 1.0) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 259

def tfw (metric = 1.0)
  format([["%f"]*6].join("\n"), 
         metric/@xscale,
         0,
         0,
         metric/@yscale,
         metric*(@xoffset+0.5/@xscale),
         metric*(@yoffset+0.5/@yscale))
end

#warp(data, x, y, opt = {}, &block) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 222

def warp (data, x, y, opt = {}, &block)
  option = {
    :grid => "point",
    :interpolation => nil,
    :gradation => false,
  }
  option.update(opt)
  case option[:grid] 
  when /^area([01]|)$/, "pixel"
    if option[:interpolation] 
      raise("can't interpolate in pixel mode")
    else
      if option[:gradation]
        warp_image_gradation(data, x, y, &block)
      else
        if option[:grid] == "area" or option[:grid] == "area0" 
          warp_image0(data, x, y, &block) ### inter(extra)polation before
        else
          warp_image1(data, x, y, &block) ### inter(extra)polation after
        end
      end
    end
  when "point"
    if option[:interpolation]
      warp_grid_interpolation(data, x, y, option[:interpolation], &block)
    else
      if option[:gradation]
        warp_grid_gradation(data, x, y, &block)
      else
        warp_grid(data, x, y, &block)
      end
    end
  else
    raise("unknown grid type")
  end
end

#warp_grid(pw, pu, pv) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 97

def warp_grid (pw, pu, pv)
  lines, pixels = pw.dim0, pw.dim1
  gx = CArray.float(lines, pixels)
  gy = CArray.float(lines, pixels)
  CArray.attach(pu,pv,pw) {
    yield(pu,pv,gx,gy)
    gx.sub!(@xoffset).mul!(@xscale)
    gy.sub!(@yoffset).mul!(@yscale)
    fill_rectangle_grid(gy, gx, pw)
  }
end

#warp_grid_gradation(pw, pu, pv) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 142

def warp_grid_gradation (pw, pu, pv)
  lines, pixels = pu.dim0, pv.dim1
  gx = CArray.float(lines, pixels)
  gy = CArray.float(lines, pixels)
  CArray.attach(pu,pv,pw) {
    yield(pu,pv,gx,gy)
    gx.sub!(@xoffset).mul!(@xscale)
    gy.sub!(@yoffset).mul!(@yscale)
#      bx = gx[[0,2],[0,2]]
#      by = gy[[0,2],[0,2]]
#      bw = pw[[0,2],[0,2]]
    draw_rectangle_gradation_grid(gy, gx, pw)
#      pw[0..-2,0..-2].each_index do |i,j|
#        draw_rectangle_gradation(by.move(i,j), bx.move(i,j), bw.move(i,j))
#      end
  }
end

#warp_grid_interpolation(pw, pu, pv, n, &block) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 160

def warp_grid_interpolation (pw, pu, pv, n, &block)
  lines, pixels = pu.dim0, pv.dim1
  m = 2+n
  hu = CArray.float(m, m)
  hv = CArray.float(m, m)
  hw = CArray.float(m, m)
  bu = pu[[0,2],[0,2]]
  bv = pv[[0,2],[0,2]]
  bw = pw[[0,2],[0,2]]
  CArray.attach(pu,pv,pw) {
    pw[0..-2,0..-2].each_index do |i,j|
      bu.move(i,j)
      bv.move(i,j)
      bw.move(i,j)
      hu.grid_new([[0,m-1],[0,m-1]])[] = bu
      hv.grid_new([[0,m-1],[0,m-1]])[] = bv
      hw.grid_new([[0,m-1],[0,m-1]])[] = bw
      [hu, hv, hw].each do |h|
        h[nil, 0].span!(h[0,0]..h[m-1,0])
        h[nil, m-1].span!(h[0,m-1]..h[m-1,m-1])
        h.dim0.times do |i|
          h[i, nil].span!(h[i,0]..h[i,m-1])
        end
      end
      warp_grid_gradation(hw, hu, hv, &block)
    end
  }
end

#warp_image0(pw, pu, pv) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 49

def warp_image0 (pw, pu, pv)
  lines, pixels = pw.dim0, pw.dim1
  mu = CArray.float(lines, pixels+1)
  mv = CArray.float(lines, pixels+1)
  gu = CArray.float(lines+1, pixels+1)
  gv = CArray.float(lines+1, pixels+1)
  gx = CArray.float(lines+1, pixels+1)
  gy = CArray.float(lines+1, pixels+1)
  CArray.attach(pu,pv,pw) {
    [[pu,mu,gu], [pv,mv,gv]].each do |p,m,g|
      m[nil,1..-2] =  0.5*p[nil,0..-2] + 0.5*p[nil,1..-1]
      m[nil,0]     =  1.5*p[nil,0]     - 0.5*p[nil,1]
      m[nil,-1]    = -0.5*p[nil,-2]    + 1.5*p[nil,-1]
      g[1..-2,nil] =  0.5*m[0..-2,nil] + 0.5*m[1..-1,nil]
      g[ 0,nil]    =  1.5*m[0,nil]     - 0.5*m[1,nil]
      g[-1,nil]    = -0.5*m[-2,nil]    + 1.5*m[-1,nil]
    end
    yield(gu,gv,gx,gy)
    gx.sub!(@xoffset).mul!(@xscale)
    gy.sub!(@yoffset).mul!(@yscale)
    fill_rectangle_image(gy, gx, pw)
  }
end

#warp_image1(pw, pu, pv) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 73

def warp_image1 (pw, pu, pv)
  lines, pixels = pw.dim0, pw.dim1
  px = CArray.float(lines, pixels)
  py = CArray.float(lines, pixels)
  mx = CArray.float(lines, pixels+1)
  my = CArray.float(lines, pixels+1)
  gx = CArray.float(lines+1, pixels+1)
  gy = CArray.float(lines+1, pixels+1)
  CArray.attach(pu,pv,pw) {
    yield(pu,pv,px,py)
    px.sub!(@xoffset).mul!(@xscale)
    py.sub!(@yoffset).mul!(@yscale)
    [[px,mx,gx], [py,my,gy]].each do |p,m,g|
      m[nil,1..-2] =  0.5*p[nil,0..-2] + 0.5*p[nil,1..-1]
      m[nil,0]     =  1.5*p[nil,0]     - 0.5*p[nil,1]
      m[nil,-1]    = -0.5*p[nil,-2]    + 1.5*p[nil,-1]
      g[1..-2,nil] =  0.5*m[0..-2,nil] + 0.5*m[1..-1,nil]
      g[ 0,nil]    =  1.5*m[0,nil]     - 0.5*m[1,nil]
      g[-1,nil]    = -0.5*m[-2,nil]    + 1.5*m[-1,nil]
    end
    fill_rectangle_image(gy, gx, pw)
  }
end

#warp_image_gradation(pw, pu, pv) ⇒ Object 



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# File 'ext/imagemap/lib/graphics/imagemap.rb', line 109

def warp_image_gradation (pw, pu, pv)
  lines, pixels = pw.dim0, pw.dim1
  mu = CArray.float(lines, pixels+1)
  mv = CArray.float(lines, pixels+1)
  mw = CArray.float(lines, pixels+1)
  gu = CArray.float(lines+1, pixels+1)
  gv = CArray.float(lines+1, pixels+1)
  gw = CArray.float(lines+1, pixels+1)
  gx = CArray.float(lines+1, pixels+1)
  gy = CArray.float(lines+1, pixels+1)
#    bgx = gx[[0,2],[0,2]]
#    bgy = gy[[0,2],[0,2]]
#    bgw = gw[[0,2],[0,2]]
#    p("hello")
  CArray.attach(pu,pv,pw) {
    [[pu,mu,gu], [pv,mv,gv], [pw.float32,mw,gw]].each do |p,m,g|
      m[nil,1..-2] =  0.5*p[nil,0..-2] + 0.5*p[nil,1..-1]
      m[nil,0]     =  1.5*p[nil,0]     - 0.5*p[nil,1]
      m[nil,-1]    = -0.5*p[nil,-2]    + 1.5*p[nil,-1]
      g[1..-2,nil] =  0.5*m[0..-2,nil] + 0.5*m[1..-1,nil]
      g[ 0,nil]    =  1.5*m[0,nil]     - 0.5*m[1,nil]
      g[-1,nil]    = -0.5*m[-2,nil]    + 1.5*m[-1,nil]
    end
    yield(gu,gv,gx,gy)
    gx.sub!(@xoffset).mul!(@xscale)
    gy.sub!(@yoffset).mul!(@yscale)
    draw_rectangle_gradation_grid(gy, gx, gw)
#      pw.each_index do |i,j|
#        draw_rectangle_gradation(bgy.move(i,j), bgx.move(i,j), bgw.move(i,j))
#      end
  }
end