Class: GeoPattern::ConcentricCirclesPattern

Inherits:
BasePattern
  • Object
show all
Defined in:
lib/geo_pattern/pattern/concentric_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/concentric_circles_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 / 5

  svg.set_width((ring_size + stroke_width) * 6)
  svg.set_height((ring_size + stroke_width) * 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)

      svg.circle(
              x*ring_size + x*stroke_width + (ring_size + stroke_width)/2,
              y*ring_size + y*stroke_width + (ring_size + stroke_width)/2,
              ring_size/2, {
                "fill"   => "none",
                "stroke" => fill,
                "style"  => {
                  "opacity" => opacity,
                  "stroke-width" => "#{stroke_width}px"
                }
              })

      val     = hex_val(39-i, 1)
      opacity = opacity(val)
      fill    = fill_color(val)

      svg.circle(
              x*ring_size + x*stroke_width + (ring_size + stroke_width)/2,
              y*ring_size + y*stroke_width + (ring_size + stroke_width)/2,
              ring_size/4, {
                "fill"         => fill,
                "fill-opacity" => opacity
              })

      i += 1
    end
  end
end