Module: Bayonetta::KeyFrameInterpolate

Included in:
MOT2File::Interpolation4, MOT2File::Interpolation5, MOT2File::Interpolation6, MOT2File::Interpolation7, MOT2File::Interpolation8, MOTFile::Interpolation4, MOTFile::Interpolation6, MOTFile::Interpolation7
Defined in:
lib/bayonetta/mot.rb

Instance Method Summary collapse

Instance Method Details

#interpol(frame, start_index, stop_index, i) ⇒ Object

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# File 'lib/bayonetta/mot.rb', line 94

def interpol(frame, start_index, stop_index, i)
  p_0 = get_p(i)
  p_1 = get_p(i+1)
  m_0 = get_m1(i)
  m_1 = get_m0(i+1)
  t = (frame - start_index).to_f / (stop_index - start_index)
  (2 * t*t*t - 3 * t*t + 1)*p_0 + (t*t*t - 2 * t*t + t)*m_0 + (-2 * t*t*t + 3 * t*t)*p_1 + (t*t*t - t * t)*m_1
end

#value(frame_index) ⇒ Object

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# File 'lib/bayonetta/mot.rb', line 120

def value(frame_index)
  kfis = key_frame_indexes
  if frame_index <= kfis.first
    return get_p(0)
  elsif frame_index >= kfis.last
    return get_p(kfis.length - 1)
  else
    kfis.each_cons(2).each_with_index { |(start_index, stop_index), i|
      if frame_index <= stop_index && frame_index >= start_index
        return interpol(frame_index, start_index, stop_index, i)
      end
    }
  end
end

#values(frame_count) ⇒ Object

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# File 'lib/bayonetta/mot.rb', line 103

def values(frame_count)
  vs = [0.0]*frame_count
  kfis = key_frame_indexes
  kfis.each_cons(2).each_with_index { |(start_index, stop_index), i|
    (start_index..stop_index).each { |frame|
      vs[frame] = interpol(frame, start_index, stop_index, i)
    }
  }
  (0...kfis.first).each { |i|
    vs[i] = vs[kfis.first]
  }
  ((kfis.last+1)...frame_count).each { |i|
    vs[i] = vs[kfis.last]
  }
  vs
end