Class: GeoPattern::ChevronPattern

Inherits:
BasePattern show all
Defined in:
lib/geo_pattern/pattern/chevron_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

#build_chevron_shape(width, height) ⇒ Object 



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# File 'lib/geo_pattern/pattern/chevron_pattern.rb', line 37

def build_chevron_shape(width, height)
  e = height * 0.66
  [
    %Q{polyline("0,0,#{width/2},#{height-e},#{width/2},#{height},0,#{e},0,0")},
    %Q{polyline("#{width/2},#{height-e},#{width},0,#{width},#{e},#{width/2},#{height},#{width/2},#{height-e}")}
  ]
end

#render_to_svg ⇒ Object 



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

def render_to_svg
  chevron_width  = map(hex_val(0, 1), 0, 15, 30, 80)
  chevron_height = map(hex_val(0, 1), 0, 15, 30, 80)
  chevron        = build_chevron_shape(chevron_width, chevron_height)

  svg.set_width(chevron_width * 6)
  svg.set_height(chevron_height * 6 * 0.66)

  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  = {
            "stroke"         => STROKE_COLOR,
            "stroke-opacity" => STROKE_OPACITY,
            "fill"           => fill,
            "fill-opacity"   => opacity,
            "stroke-width"   => 1
      }

      svg.group(chevron, styles.merge({"transform" => "translate(#{x*chevron_width},#{y*chevron_height*0.66 - chevron_height/2})"}))

      # Add an extra row at the end that matches the first row, for tiling.
      if (y == 0)
        svg.group(chevron, styles.merge({"transform" => "translate(#{x*chevron_width},#{6*chevron_height*0.66 - chevron_height/2})"}))
      end
      i += 1
    end
  end
end