Module: Sevgi::Graphics::Mixtures::Transform::InstanceMethods

Defined in:
lib/sevgi/graphics/mixtures/transform.rb

Instance Method Summary collapse

Instance Method Details

#Align(position, inner:, outer:) ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 8

def Align(position, inner:, outer:)
  return self unless position && inner && outer

  case position.to_sym
  when :center then Translate((outer.width - inner.width) / 2.0, (outer.height - inner.height) / 2.0)
  else              ArgumentError.("Unsupported alignment: #{position}")
  end
end

#Matrix(*values) ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 17

def Matrix(*values)
  tap do
    ArgumentError.("Incorrect transform matrix (six values required): #{values}") if values.size != 6

    next if values.map(&:to_f).all? { _1 == 0.0 }

    attributes[:"transform+"] = "matrix(#{values.join(" ")})"
  end
end

#Rotate(a, *origin) ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 27

def Rotate(a, *origin)
  tap do
    ArgumentError.("Incorrect origin (two coordinates required): #{origin}") if !origin.empty? && origin.size != 2

    next if a.to_f == 0.0

    attributes[:"transform+"] = "rotate(#{[ a, *origin ].join(", ")})"
  end
end

#Scale(x, y = nil) ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 37

def Scale(x, y = nil)
  tap do
    next if x.to_f == 0.0 && (y.nil? || y.to_f == 0.0)

    attributes[:"transform+"] = "scale(#{(y ? [ x, y ] : [ x ]).join(", ")})"
  end
end

#Scale! ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 45

def Scale!(...)
  Scale(...).tap do
    attributes[:"vector-effect"] = "non-scaling-stroke" unless attributes[:"vector-effect"]
  end
end

#Skew(ax, ay) ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 51

def Skew(ax, ay)
  Matrix(1.0, F.approx(F.tan(ay)), F.approx(F.tan(ax)), 1.0, 0.0, 0.0) # TODO: xxx
end

#SkewX(a) ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 55

def SkewX(a)
  tap do
    next if a.to_f == 0.0

    attributes[:"transform+"] = "skewX(#{a})"
  end
end

#SkewY(a) ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 63

def SkewY(a)
  tap do
    next if a.to_f == 0.0

    attributes[:"transform+"] = "skewY(#{a})"
  end
end

#Translate(x, y = nil) ⇒ Object 



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# File 'lib/sevgi/graphics/mixtures/transform.rb', line 71

def Translate(x, y = nil)
  tap do
    next if x.to_f == 0.0 && (y.nil? || y.to_f == 0.0)

    attributes[:"transform+"] = "translate(#{(y ? [ x, y ] : [ x ]).join(" ")})"
  end
end