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103
// Initialize the fictitious halfedge lying on the top edge of the
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104
// fictitious face. We start from the leftmost halfedge, which is
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105
// incident to the top-left vertex and directed from right to left.
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107
Vertex_const_handle (m_top_traits->top_left_vertex());
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109
m_top_fict = v_tl->incident_halfedges();
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110
if (m_top_fict->direction() == ARR_LEFT_TO_RIGHT)
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111
m_top_fict = m_top_fict->next()->twin();
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115
Vertex_const_handle (m_top_traits->top_right_vertex());