Class: GeoPattern::OverlappingCirclesPattern

Inherits:
BasePattern
  • Object
show all
Defined in:
lib/geo_pattern/pattern/overlapping_circles_pattern.rb

Constant Summary

Constants inherited from BasePattern

BasePattern::FILL_COLOR_DARK, BasePattern::FILL_COLOR_LIGHT, BasePattern::OPACITY_MAX, BasePattern::OPACITY_MIN, BasePattern::STROKE_COLOR, BasePattern::STROKE_OPACITY

Instance Attribute Summary

Attributes inherited from BasePattern

#hash, #svg

Instance Method Summary collapse

Methods inherited from BasePattern

#fill_color, #hex_val, #map, #opacity

Instance Method Details

#render_to_svg ⇒ Object 



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# File 'lib/geo_pattern/pattern/overlapping_circles_pattern.rb', line 3

def render_to_svg
  scale    = hex_val(0, 1)
  diameter = map(scale, 0, 15, 25, 200)
  radius   = diameter/2;

  svg.set_width(radius * 6)
  svg.set_height(radius * 6)

  i = 0
  for y in 0..5
    for x in 0..5
      val     = hex_val(i, 1)
      opacity = opacity(val)
      fill    = fill_color(val)

      styles = {
        "fill"  => fill,
        "style" => {
          "opacity" => opacity
        }
      }

      svg.circle(x*radius, y*radius, radius, styles)

      # Add an extra one at top-right, for tiling.
      if (x == 0)
        svg.circle(6*radius, y*radius, radius, styles)
      end

      # Add an extra row at the end that matches the first row, for tiling.
      if (y == 0)
        svg.circle(x*radius, 6*radius, radius, styles)
      end

      # Add an extra one at bottom-right, for tiling.
      if (x == 0 and y == 0)
        svg.circle(6*radius, 6*radius, radius, styles)
      end
      i += 1
    end
  end
end