Class: GeoPattern::OverlappingRingsPattern

Inherits:
BasePattern
  • Object
show all
Defined in:
lib/geo_pattern/pattern/overlapping_rings_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_rings_pattern.rb', line 3

def render_to_svg
  scale        = hex_val(0, 1)
  ring_size    = map(scale, 0, 15, 10, 60)
  stroke_width = ring_size / 4

  svg.set_width(ring_size * 6)
  svg.set_height(ring_size * 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"   => "none",
        "stroke" => fill,
        "style"  => {
          "opacity" => opacity,
          "stroke-width" => "#{stroke_width}px"
        }
      }

      svg.circle(x*ring_size, y*ring_size, ring_size - stroke_width/2, styles)

      # Add an extra one at top-right, for tiling.
      if (x == 0)
        svg.circle(6*ring_size, y*ring_size, ring_size - stroke_width/2, styles)
      end

      if (y == 0)
        svg.circle(x*ring_size, 6*ring_size, ring_size - stroke_width/2, styles)
      end

      if (x == 0 and y == 0)
        svg.circle(6*ring_size, 6*ring_size, ring_size - stroke_width/2, styles)
      end
      i += 1
    end
  end
end