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void DR_Dist_To_Root_Pre(t_node *a, t_node *d, t_edge *b, t_tree *tree);
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void DR_Dist_To_Root(t_node *n_root, t_tree *tree);
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void DR_Get_X_Coord_Pre(t_node *a, t_node *d, t_edge *b, tdraw *w, int fixed_tips, t_tree *tree);
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void DR_Get_X_Coord(int fixed_tips, tdraw *w, t_tree *tree);
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tdraw *DR_Make_Tdraw_Struct(t_tree *tree);
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void DR_Init_Tdraw_Struct(tdraw *d);
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void DR_Get_Tree_Box_Width(tdraw *w, t_tree *tree);
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void DR_Get_Y_Coord_Post(t_node *a, t_node *d, t_edge *b, phydbl *next_y_slot, int fixed_tips, tdraw *w, t_tree *tree);
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void DR_Get_Y_Coord(int fixed_tips, tdraw *w, t_tree *tree);
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void DR_Get_Tree_Coord(t_tree *tree);
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phydbl DR_Get_Max_Dist_To_Root(t_tree *tree);
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void DR_Print_Tree_Postscript(int tree_num, int render_name,FILE *fp, t_tree *tree);
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void DR_Print_Tree_Postscript_Pre(t_node *a, t_node *d, int render_name, FILE *fp, tdraw *w, t_tree *tree);
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void DR_Print_Postscript_EOF(FILE *fp);
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void DR_Print_Postscript_Header(int n_pages, FILE *fp);
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void DR_Get_Tree_Coord_Scaled(tdraw *w, t_tree *tree);
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void DR_Get_Cdf_Mat(t_tree *tree);
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void DR_Draw_Tree(char *file_name, t_tree *tree);