Class: Amaze::Formatter::Image::Upsilon

Inherits:
Amaze::Formatter::Image show all
Defined in:
lib/amaze/formatter/image/upsilon.rb

Instance Attribute Summary

Attributes inherited from Amaze::Formatter::Image

#grid, #options

Instance Method Summary collapse

Methods inherited from Amaze::Formatter::Image

#background_color, #border_width, #canvas, #cell_offset, #cell_width, colors, #distance_color, #distances, #distances_max, #gradient, #hide_walls?, #image, #initialize, #path?, #path_cell?, #path_cells, #path_color, #path_finish, #path_start, #path_width, #render, #show_grid?, #wall_color, #wall_width, #write

Constructor Details

This class inherits a constructor from Amaze::Formatter::Image

Instance Method Details

#center_coord(cell) ⇒ Object 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 113

def center_coord cell
  row, column = cell.row, cell.column
  
  d = partial_cell + cell_width / 2.0
  x = column * pattern_width + d + cell_offset
  y = row * pattern_width + d + cell_offset
  [x, y]
end

#coord(cell) ⇒ Object 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 93

def coord cell
  row, column = cell.row, cell.column
  
  x1 = column * pattern_width + cell_offset
  x2 = x1 + partial_cell
  x3 = x2 + cell_width
  x4 = x3 + partial_cell
  
  y1 = row * pattern_width + cell_offset
  y2 = y1 + partial_cell
  y3 = y2 + cell_width
  y4 = y3 + partial_cell

  if (row+column).even?
    [x2, y1, x3, y1, x4, y2, x4, y3, x3, y4, x2, y4, x1, y3, x1, y2]
  else
    [x2, y2, x3, y2, x3, y3, x2, y3]
  end
end

#image_width ⇒ Object Also known as: image_height 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 130

def image_width
  pattern_width * (grid.columns) + partial_cell + wall_width + border_width * 2 + 1
end

#partial_cell ⇒ Object 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 122

def partial_cell
  @partial_cell ||= cell_width * Math.sqrt(2) / 2.0
end

#pattern_width ⇒ Object 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 126

def pattern_width
  @pattern_width ||= cell_width + partial_cell
end

#render_background ⇒ Object 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 4

def render_background
  canvas.stroke_antialias true
  canvas.stroke_linecap 'round'
  canvas.stroke_linejoin 'round'
  canvas.stroke 'none'
  grid.each_cell do |cell|
    color = distance_color cell
    next unless color
    canvas.fill color
    canvas.polygon *coord(cell)
  end
end

#render_grid ⇒ Object 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 17

def render_grid
  canvas.stroke_antialias true
  canvas.stroke_linecap 'round'
  canvas.stroke_linejoin 'round'
  canvas.stroke 'gray90'
  canvas.stroke_width 1
  canvas.fill 'none'

  grid.each_cell do |cell|
    canvas.polygon *coord(cell)
  end
end

#render_path ⇒ Object 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 61

def render_path
  canvas.stroke_antialias true
  canvas.stroke_linecap 'round'
  canvas.stroke_linejoin 'round'
  canvas.fill 'none'
  canvas.stroke path_color
  canvas.stroke_width path_width
  
  grid.each_cell do |cell|
    next unless path_cell? cell

    x1, y1 = center_coord cell
    %i( north northeast east southeast ).each do |direction|
      # square cells don't respond to northeast and southeast
      next unless cell.respond_to? direction
      next unless path?(direction, cell)
      x2, y2 = center_coord cell.send(direction)
      canvas.line x1, y1, x2, y2
    end
  end

  # draw start and finish
  canvas.stroke_antialias true
  canvas.stroke_linecap 'round'
  canvas.fill path_color
  canvas.stroke 'none'
  [path_start, path_finish].compact.each do |cell|
    x, y = center_coord cell
    canvas.ellipse x, y, path_width*2, path_width*2, 0, 360
  end
end

#render_wall ⇒ Object 



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# File 'lib/amaze/formatter/image/upsilon.rb', line 30

def render_wall
  canvas.stroke_antialias true
  canvas.stroke_linecap 'round'
  canvas.stroke_linejoin 'round'
  canvas.stroke wall_color
  canvas.stroke_width wall_width
  canvas.fill 'none'

  grid.each_cell do |cell|
    ax, ay, bx, by, cx, cy, dx, dy, ex, ey, fx, fy, gx, gy, hx, hy = coord cell
    
    if (cell.row + cell.column).even?
      # octo cells
      canvas.line ax, ay, bx, by unless cell.linked_to?(:north)
      canvas.line bx, by, cx, cy unless cell.linked_to?(:northeast)
      canvas.line cx, cy, dx, dy unless cell.linked_to?(:east)
      canvas.line dx, dy, ex, ey unless cell.linked_to?(:southeast)
      canvas.line ex, ey, fx, fy unless cell.linked_to?(:south)
      canvas.line fx, fy, gx, gy unless cell.linked_to?(:southwest)
      canvas.line gx, gy, hx, hy unless cell.linked_to?(:west)
      canvas.line hx, hy, ax, ay unless cell.linked_to?(:northwest)
    else
      # square cells
      canvas.line ax, ay, bx, by unless cell.linked_to?(:north)
      canvas.line bx, by, cx, cy unless cell.linked_to?(:east)
      canvas.line cx, cy, dx, dy unless cell.linked_to?(:south)
      canvas.line dx, dy, ax, ay unless cell.linked_to?(:west)
    end
  end
end