class ImageParadise::Gruff::BarConversion
Attributes
graph_height[W]
graph_top[W]
minimum_value[W]
mode[W]
spread[W]
zero[W]
Public Instance Methods
get_left_y_right_y_scaled(data_point, result)
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# File lib/image_paradise/graphs/bar_conversion.rb, line 27 def get_left_y_right_y_scaled(data_point, result) case @mode when 1 then # Case one # minimum value >= 0 ( only positiv values ) result[0] = @graph_top + @graph_height*(1 - data_point) + 1 result[1] = @graph_top + @graph_height - 1 when 2 then # Case two # only negativ values result[0] = @graph_top + 1 result[1] = @graph_top + @graph_height*(1 - data_point) - 1 when 3 then # Case three # positiv and negativ values val = data_point-@minimum_value/@spread if data_point >= @zero result[0] = @graph_top + @graph_height*(1 - (val-@zero)) + 1 result[1] = @graph_top + @graph_height*(1 - @zero) - 1 else result[0] = @graph_top + @graph_height*(1 - (val-@zero)) + 1 result[1] = @graph_top + @graph_height*(1 - @zero) - 1 end else result[0] = 0.0 result[1] = 0.0 end end