Class: CTioga2::Graphics::Styles::ParametricPlotStyle

Inherits:
BasicStyle
  • Object
show all
Defined in:
lib/ctioga2/graphics/styles/plot-types.rb

Overview

This class defines how the Z values are converted into stylistic information

Constant Summary

Constants inherited from BasicStyle

BasicStyle::AllStyles, BasicStyle::OldAttrAccessor

Instance Method Summary collapse

Methods inherited from BasicStyle

alias_for, aliases, attr_accessor, attribute_type, attribute_types, attributes, convert_string_hash, defined_aliases, deprecated_attribute, from_hash, inherited, #instance_variable_defined?, normalize_hash, normalize_in, normalize_out, options_hash, #set_from_hash, sub_style, sub_styles, #to_hash, typed_attribute, #update_from_other

Constructor Details

#initialize ⇒ ParametricPlotStyle

Returns a new instance of ParametricPlotStyle.



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# File 'lib/ctioga2/graphics/styles/plot-types.rb', line 51

def initialize
  @z1 = :marker_color
end

Instance Method Details

#marker_style(curve_style, zvalue, zmin, zmax) ⇒ Object

Returns the marker style for the given Z values.

This will only work if #prepare has been called first !



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# File 'lib/ctioga2/graphics/styles/plot-types.rb', line 75

def marker_style(curve_style, zvalue, zmin, zmax)

  style = curve_style.marker.dup

  if @reversed[:marker_scale]
    idx = @reversed[:marker_scale]
    if idx < zvalue.size
      max_scale = curve_style.marker.scale || 1.0

      ## @todo Later on, when a min_marker_scale is provided,
      ## then the scale will be constrained between the min
      ## and max. For now, it is simply proportionnal to the
      ## absolute value of the largest.
      min_scale = curve_style.marker_min_scale

      zm = zmin[idx]
      zM = zmax[idx] 
      
      mm = zM.abs
      m2 = zm.abs
      mm = m2 if m2 > mm

      z = zvalue[idx]

      style.scale = if min_scale
                      min_scale + (max_scale - min_scale) * 
                        (z - zm)/(zM - zm)
                    else
                      zvalue[idx].abs/mm * max_scale
                    end
    end

  end

  if @reversed[:marker_color]
    idx = @reversed[:marker_color]
    if idx < zvalue.size
      style.color = curve_style.marker_color_map.z_color(zvalue[idx], 
                                                         zmin[idx], 
                                                         zmax[idx])
    end
  end

  return style

end

#prepare ⇒ Object 



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# File 'lib/ctioga2/graphics/styles/plot-types.rb', line 55

def prepare
  @reversed = {}

  2.times do |i|
    val = self.send("z#{i+1}")
    if val
      @reversed[val] = i
      @needed = i+1
    end
  end
end

#z_columns_needed ⇒ Object

The number of Z columns needed for the style.



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# File 'lib/ctioga2/graphics/styles/plot-types.rb', line 68

def z_columns_needed
  return @needed || 0
end