/* VCG description handler for Bison. Copyright (C) 2001, 2002, 2005 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. Bison is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. Bison is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Bison; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef VCG_H_ # define VCG_H_ /* VCG color map. The 32 prime predefined colors. */ enum color { white = 0, blue, red, green = 3, yellow, magenta, cyan = 6, darkgrey, darkblue, darkred = 9, darkgreen, darkyellow, darkmagenta = 12, darkcyan, gold, lightgrey = 15, lightblue, lightred, lightgreen = 18, lightyellow, lightmagenta, lightcyan = 21, lilac, turquoise, aquamarine = 24, khaki, purple, yellowgreen = 27, pink, orange, orchid, black = 31 }; /* VCG textmode. Specify the adjustement of the text within the border of a summary node. */ enum textmode { centered, left_justify, right_justify }; /* VCG shapes. Used for nodes shapes. */ enum shape { box, rhomb, ellipse, triangle }; /* Structure for colorentries. */ struct colorentry { int color_index; int red_cp; int green_cp; int blue_cp; struct colorentry *next; }; /* Structure to construct lists of classnames. */ struct classname { int no; /* Class number */ const char *name; /* Name associated to the class no. */ struct classname *next; /* next name class association. */ }; /* Structure is in infoname. */ struct infoname { int integer; char const *chars; struct infoname *next; }; /* VCG decision yes/no. */ enum decision { yes, no }; /* VCG graph orientation. */ enum orientation { top_to_bottom, bottom_to_top, left_to_right, right_to_left }; /* VCG alignment for node alignement. */ enum alignment { center, top, bottom }; /* VCG arrow mode. */ enum arrow_mode { fixed, free_a }; /* VCG crossing weight type. */ enum crossing_type { bary, median, barymedian, medianbary }; /* VCG views. */ enum view { normal_view, cfish, pfish, fcfish, fpfish }; /*------------------------------------------------------. | Node attributs list. structure that describes a node. | `------------------------------------------------------*/ struct node { /* Title the unique string identifying the node. This attribute is mandatory. */ const char *title; /* Label the text displayed inside the node. If no label is specified then the title of the node will be used. Note that this text may contain control characters like NEWLINE that influences the size of the node. */ const char *label; /* loc is the location as x, y position relatively to the system of coordinates of the graph. Locations are specified in the form loc: - x: xpos y: ypos "". The locations of nodes are only valid, if the whole graph is fully specified with locations and no part is folded. The layout algorithm of the tool calculates appropriate x, y positions, if at least one node that must be drawn (i.e., is not hidden by folding or edge classes) does not have fixed specified locations. Default is none. */ int locx; int locy; /* vertical order is the level position (rank) of the node. We can also specify level: int. Level specifications are only valid, if the layout is calculated, i.e. if at least one node does not have a fixed location specification. The layout algorithm partitioned all nodes into levels 0...maxlevel. Nodes at the level 0 are on the upper corner. The algorithm is able to calculate appropriate levels for the nodes automatically, if no fixed levels are given. Specifications of levels are additional constraints, that may be ignored, if they are in conflict with near edge specifications. Default values are unspecified. */ int vertical_order; /* horizontal order is the horizontal position of the node within a level. The nodes which are specified with horizontal positions are ordered according to these positions within the levels. The nodes which do not have this attribute are inserted into this ordering by the crossing reduction mechanism. Note that connected components are handled separately, thus it is not possible to intermix such components by specifying a horizontal order. If the algorithm for downward laid out trees is used, the horizontal order influences only the order of the child nodes at a node, but not the order of the whole level. Default is unspecified. */ int horizontal_order; /* width, height is the width and height of a node including the border. If no value (in pixels) is given then width and height are calculated from the size of the label. Default are width and height of the label. */ int width; int height; /* shrink, stretch gives the shrinking and stretching factor of the node. The values of the attributes width, height, borderwidth and the size of the label text is scaled by ((stretch=shrink) \Lambda 100) percent. Note that the actual scale value is determined by the scale value of a node relatively to a scale value of the graph, i.e. if (stretch,shrink) = (2,1) for the graph and (stretch,shrink) = (2,1) for the node of the graph, then the node is scaled by the factor 4 compared to the normal size. The scale value can also be specified by scaling: float. Default are 1,1. */ int shrink; int stretch; /* folding specifies the default folding of the nodes. The folding k (with k ? 0) means that the graph part that is reachable via edges of a class less or equal to k is folded and displayed as one node. There are commands to unfold such summary nodes, see section 5. If no folding is specified for a node, then the node may be folded if it is in the region of another node that starts the folding. If folding 0 is specified, then the node is never folded. In this case the folding stops at the predecessors of this node, if it is reachable from another folding node. The summary node inherits some attributes from the original node which starts the folding (all color attributes, textmode and label, but not the location). A folded region may contain folded regions with smaller folding class values (nested foldings). If there is more than one node that start the folding of the same region (this implies that the folding class values are equal) then the attributes are inherited by one of these nodes nondeterministically. If foldnode attributes are specified, then the summary node attributes are inherited from these attributes. Default is none. */ int folding; /* shape specifies the visual appearance of a node: box, rhomb, ellipse, and triangle. The drawing of ellipses is much slower than the drawing of the other shapes. Default is box. */ enum shape shape; /* textmode specifies the adjustment of the text within the border of a node. The possibilities are center, left.justify and right.justify. Default is center. */ enum textmode textmode; /* borderwidth specifies the thickness of the node's border in pixels. color is the background color of the node. If none is given, the node is white. For the possibilities, see the attribute color for graphs. Default is 2. */ int borderwidth; /* node color. Default is white or transparent, */ enum color color; /* textcolor is the color for the label text. bordercolor is the color of the border. Default color is the textcolor. info1, info2, info3 combines additional text labels with a node or a folded graph. info1, Default is black. */ enum color textcolor; /* info2, info3 can be selected from the menu. The corresponding text labels can be shown by mouse clicks on nodes. Default are null strings. */ const char *infos[3]; /* Node border color. Default is textcolor. */ enum color bordercolor; /* Next node node... */ struct node *next; }; /* typedef alias. */ typedef struct node node; /*-------------------------------------------------------. | Edge attributs list. Structure that describes an edge. | `-------------------------------------------------------*/ /* VCG Edge type. */ enum edge_type { normal_edge, back_edge, near_edge, bent_near_edge }; /* Structs enum definitions for edges. */ enum linestyle { continuous, dashed, dotted, invisible }; enum arrowstyle { solid, line, none }; /* The struct edge itself. */ struct edge { /* Edge type. Default is normal edge. */ enum edge_type type; /* Sourcename is the title of the source node of the edge. Default: none. */ const char *sourcename; /* Mandatory. */ /* Targetname is the title of the target node of the edge. Default: none. */ const char *targetname; /* Mandatory. */ /* Label specifies the label of the edge. It is drawn if display.edge.labels is set to yes. Default: no label. */ const char *label; /* Linestyle specifies the style the edge is drawn. Possibilities are: ffl continuous a solid line is drawn ( -- ) ffl dashed the edge consists of single dashes ( - - - ) ffl dotted the edge is made of single dots ( \Delta \Delta \Delta ) ffl invisible the edge is not drawn. The attributes of its shape (color, thickness) are ignored. To draw a dashed or dotted line needs more time than solid lines. Default is continuous. */ enum linestyle linestyle; /* Thickness is the thickness of an edge. Default is 2. */ int thickness; /* Class specifies the folding class of the edge. Nodes reachable by edges of a class less or equal to a constant k specify folding regions of k. See the node attribute folding and the folding commands. Default is 1. */ int class; /* color is the color of the edge. Default is black. */ enum color color; /* textcolor is the color of the label of the edge. arrowcolor, backarrowcolor is the color of the arrow head and of the backarrow head. priority The positions of the nodes are mainly determined by the incoming and outgoing edges. One can think of rubberbands instead of edges that pull a node into its position. The priority of an edges corresponds to the strength of the rubberband. Default is color. */ enum color textcolor; /* Arrow color. Default is color. */ enum color arrowcolor; /* BackArrow color. Default is color. */ enum color backarrowcolor; /* arrowsize, backarrowsize The arrow head is a right-angled, isosceles triangle and the cathetuses have length arrowsize. Default is 10. */ int arrowsize; /* Backarrow size Default is 0. */ int backarrowsize; /* arrowstyle, backarrowstyle Each edge has two arrow heads: the one appears at the target node (the normal arrow head), the other appears at the source node (the backarrow head). Normal edges only have the normal solid arrow head, while the backarrow head is not drawn, i.e. it is none. Arrowstyle is the style of the normal arrow head, and backarrowstyle is the style of the backarrow head. Styles are none, i.e. no arrow head, solid, and line. Default is solid. */ enum arrowstyle arrowstyle; /* Default is none. */ enum arrowstyle backarrowstyle; /* Default is 1. */ int priority; /* Anchor. An anchor point describes the vertical position in a node where an edge goes out. This is useful, if node labels are several lines long, and outgoing edges are related to label lines. (E.g., this allows a nice visualization of structs containing pointers as fields.). Default is none. */ int anchor; /* Horizontal order is the horizontal position the edge. This is of interest only if the edge crosses several levels because it specifies the point where the edge crosses the level. within a level. The nodes which are specified with horizontal positions are ordered according to these positions within a level. The horizontal position of a long edge that crosses the level specifies between which two node of that level the edge has to be drawn. Other edges which do not have this attribute are inserted into this ordering by the crossing reduction mechanism. Note that connected components are handled separately, thus it is not possible to intermix such components by specifying a horizontal order. Default is unspcified. */ int horizontal_order; /* ** Next edge node... */ struct edge *next; }; /* ** typedef alias. */ typedef struct edge edge; /*--------------------------------------------------------. | Graph attributs list. Structure that describes a graph. | `--------------------------------------------------------*/ struct graph { /* Graph title or name. Title specifies the name (a string) associated with the graph. The default name of a subgraph is the name of the outer graph, and the name of the outmost graph is the name of the specification input file. The name of a graph is used to identify this graph, e.g., if we want to express that an edge points to a subgraph. Such edges point to the root of the graph, i.e. the first node of the graph or the root of the first subgraph in the graph, if the subgraph is visualized explicitly. By default, it's the name of the vcg graph file description. */ const char *title; /* Graph label. Label the text displayed inside the node, when the graph is folded to a node. If no label is specified then the title of the graph will be used. Note that this text may contain control characters like NEWLINE that influences the size of the node. By default, it takes the title value */ const char *label; /* Any informations. Info1, info2, info3 combines additional text labels with a node or a folded graph. info1, info2, info3 can be selected from the menu interactively. The corresponding text labels can be shown by mouse clicks on nodes. Default values are empty strings (here NULL pointers) */ const char *infos[3]; /* Background color and summary node colors Color specifies the background color for the outermost graph, or the color of the summary node for subgraphs. Colors are given in the enum declared above. If more than these default colors are needed, a color map with maximal 256 entries can be used. The first 32 entries correspond to the colors just listed. A color of the color map can selected by the color map index, an integer, for instance red has index 2, green has index 3, etc. Default is white for background and white or transparent for summary nodes. */ enum color color; /* Textcolor. need explanations ??? default is black for summary nodes. */ enum color textcolor; /* Bordercolor is the color of the summary node's border. Default color is the textcolor. width, height are width and height of the displayed part of the window of the outermost graph in pixels, or width and height of the summary node of inner subgraphs. Default is the default of the textcolor. */ enum color bordercolor; /* Width, height are width and height of the displayed part of the window of the outermost graph in pixels, or width and height of the summary node of inner subgraphs. Default value is 100. */ int width; int height; /* Specify the thickness if summary node's border in pixels. default value is 2. */ int borderwidth; /* x, y are the x-position and y-position of the graph's window in pixels, relatively to the root screen, if it is the outermost graph. The origin of the window is upper, left hand. For inner subgraphs, it is the position of the folded summary node. The position can also be specified in the form loc: fx:int y:intg. The default value is 0. */ int x; int y; /* folding of a subgraph is 1, if the subgraph is fused, and 0, if the subgraph is visualized explicitly. There are commands to unfold such summary nodes. Default value is 0 */ int folding; /* Shrink, stretch gives the shrinking and stretching factor for the graph's representation (default is 1, 1). ((stretch=shrink) \Lambda 100) is the scaling of the graph in percentage, e.g., (stretch,shrink) = (1,1) or (2,2) or (3,3) : : : is normal size, (stretch,shrink) = (1,2) is half size, (stretch,shrink) = (2,1) is double size. For subgraphs, it is also the scaling factor of the summary node. The scaling factor can also be specified by scaling: float (here, scaling 1.0 means normal size). */ int shrink; int stretch; /* textmode specifies the adjustment of the text within the border of a summary node. The possibilities are center, left.justify and right.justify. Default value is center.*/ enum textmode textmode; /* Shape can be specified for subgraphs only. It is the shape of the subgraph summary node that appears if the subgraph is folded: box, rhomb, ellipse, and triangle. vertical order is the level position (rank) of the summary node of an inner subgraph, if this subgraph is folded. We can also specify level: int. The level is only recognized, if an automatical layout is calculated. horizontal order is the horizontal position of the summary node within a level. The nodes which are specified with horizontal positions are ordered according to these positions within the levels. The nodes which do not have this attribute are inserted into this ordering by the crossing reduction mechanism. Note that connected components are handled separately, thus it is not possible to intermix such components by specifying a horizontal order. If the algorithm for downward laid out trees is used, the horizontal order influences only the order of the child nodes at a node, but not the order of the whole level. Default is box, other: rhomb, ellipse, triangle. */ enum shape shape; /* Vertical order is the level position (rank) of the summary node of an inner subgraph, if this subgraph is folded. We can also specify level: int. The level is only recognized, if an automatical layout is calculated. */ int vertical_order; /* Horizontal order is the horizontal position of the summary node within a level. The nodes which are specified with horizontal positions are ordered according to these positions within the levels. The nodes which do not have this attribute are inserted into this ordering by the crossing reduction mechanism. Note that connected components are handled separately, thus it is not possible to intermix such components by specifying a horizontal order. If the algorithm for downward laid out trees is used, the horizontal order influences only the order of the child nodes at a node, but not the order of the whole level. */ int horizontal_order; /* xmax, ymax specify the maximal size of the virtual window that is used to display the graph. This is usually larger than the displayed part, thus the width and height of the displayed part cannot be greater than xmax and ymax. Only those parts of the graph are drawn that are inside the virtual window. The virtual window can be moved over the potential infinite system of coordinates by special positioning commands. Defaults are 90 and 90. */ int xmax; int ymax; /* xy-base: specify the upper left corner coordinates of the graph relatively to the root window. Defaults are 5, 5. */ int xbase; int ybase; /* xspace, yspace the minimum horizontal and vertical distance between nodes. xlspace is the horizontal distance between lines at the points where they cross the levels. (At these points, dummy nodes are used. In fact, this is the horizontal distance between dummy nodes.) It is recommended to set xlspace to a larger value, if splines are used to draw edges, to prevent sharp bendings. Default are 20 and 70. */ int xspace; int yspace; /* The horizontal space between lines at the point where they cross the levels. defaults value is 1/2 xspace (polygone) and 4/5 xspace (splines)*/ int xlspace; /* xraster, yraster specifies the raster distance for the position of the nodes. The center of a node is aligned to this raster. xlraster is the horizontal raster for the positions of the line control points (the dummy nodes). It should be a divisor of xraster. defaults are 1,1. */ int xraster; int yraster; /* xlraster is the horizontal raster for the positions of the line control points (the dummy nodes). It should be a divisor of xraster. defaults is 1. */ int xlraster; /* hidden specifies the classes of edges that are hidden. Edges that are within such a class are not laid out nor drawn. Nodes that are only reachable (forward or backward) by edges of an hidden class are not drawn. However, nodes that are not reachable at all are drawn. (But see attribute ignore.singles.) Specification of classes of hidden edges allows to hide parts of a graph, e.g., annotations of a syntax tree. This attribute is only allowed at the outermost level. More than one settings are possible to specify exactly the set of classes that are hidden. Note the important difference between hiding of edges and the edge line style invisible. Hidden edges are not existent in the layout. Edges with line style invisible are existent in the layout; they need space and may produce crossings and influence the layout, but you cannot see them. No default value. */ int hidden; /* Classname allows to introduce names for the edge classes. The names are used in the menus. infoname allows to introduce names for the additional text labels. The names are used in the menus. defaults are 1,2,3... By default, no class names. */ struct classname *classname; /* Infoname allows to introduce names for the additional text labels. The names are used in the menus. Infoname is given by an integer and a string. The default value is NULL. */ struct infoname *infoname; /* Colorentry allows to fill the color map. A color is a triplet of integer values for the red/green/blue-part. Each integer is between 0 (off) and 255 (on), e.g., 0 0 0 is black and 255 255 255 is white. For instance colorentry 75 : 70 130 180 sets the map entry 75 to steel blue. This color can be used by specifying just the number 75. Default id NULL. */ struct colorentry *colorentry; /* Layout downfactor, layout upfactor, layout nearfactor The layout algorithm partitions the set of edges into edges pointing upward, edges pointing downward, and edges pointing sidewards. The last type of edges is also called near edges. If the layout.downfactor is large compared to the layout.upfactor and the layout.nearfactor, then the positions of the nodes is mainly determined by the edges pointing downwards. If the layout.upfactor is large compared to the layout.downfactor and the layout.nearfactor, then the positions of the nodes is mainly determined by the edges pointing upwards. If the layout.nearfactor is large, then the positions of the nodes is mainly determined by the edges pointing sidewards. These attributes have no effect, if the method for downward laid out trees is used. Default is normal. */ int layout_downfactor; int layout_upfactor; int layout_nearfactor; /* Layout splinefactor determines the bending at splines. The factor 100 indicates a very sharp bending, a factor 1 indicates a very flat bending. Useful values are 30 : : : 80. */ int layout_splinefactor; /* Late edge labels yes means that the graph is first partitioned and then, labels are introduced. The default algorithm first creates labels and then partitions the graph, which yield a more compact layout, but may have more crossings. Default is no. */ enum decision late_edge_labels; /* Display edge labels yes means display labels and no means don't display edge labels. Default vaule is no. */ enum decision display_edge_labels; /* Dirty edge labels yes enforces a fast layout of edge labels, which may very ugly because several labels may be drawn at the same place. Dirty edge labels cannot be used if splines are used. Default is no. */ enum decision dirty_edge_labels; /* Finetuning no switches the fine tuning phase of the graph layout algorithm off, while it is on as default. The fine tuning phase tries to give all edges the same length. Default is yes. */ enum decision finetuning; /* Ignore singles yes hides all nodes which would appear single and unconnected from the remaining graph. Such nodes have no edge at all and are sometimes very ugly. Default is to show all nodes. Default is no. */ enum decision ignore_singles; /* priority phase yes replaces the normal pendulum method by a specialized method: It forces straight long edges with 90 degree, just as the straight phase. In fact, the straight phase is a fine tune phase of the priority method. This phase is also recommended, if an orthogonal layout is selected (see manhattan.edges). Default is no. */ enum decision priority_phase; /* manhattan edges yes switches the orthogonal layout on. Orthogonal layout (or manhattan layout) means that all edges consist of line segments with gradient 0 or 90 degree. Vertical edge segments might by shared by several edges, while horizontal edge segments are never shared. This results in very aesthetical layouts just for flowcharts. If the orthogonal layout is used, then the priority phase and straight phase should be used. Thus, these both phases are switched on, too, unless priority layout and straight line tuning are switched off explicitly. Default is no. */ enum decision manhattan_edges; /* Smanhattan edges yes switches a specialized orthogonal layout on: Here, all horizontal edge segments between two levels share the same horizontal line, i.e. not only vertical edge segments are shared, but horizontal edge segments are shared by several edges, too. This looks nice for trees but might be too confusing in general, because the location of an edge might be ambiguously. Default is no. */ enum decision smanhattan_edges; /* Near edges no suppresses near edges and bent near edges in the graph layout. Default is yes. */ enum decision near_edges; /* Orientation specifies the orientation of the graph: top.to.bottom, bottom.to.top, left.to.right or right.to.left. Note: the normal orientation is top.to.bottom. All explanations here are given relatively to the normal orientation, i.e., e.g., if the orientation is left to right, the attribute xlspace is not the horizontal but the vertical distance between lines, etc. Default is to_to_bottom. */ enum orientation orientation; /* Node alignment specified the vertical alignment of nodes at the horizontal reference line of the levels. If top is specified, the tops of all nodes of a level have the same y-coordinate; on bottom, the bottoms have the same y-coordinate, on center the nodes are centered at the levels. Default is center. */ enum alignment node_alignment; /* Port sharing no suppresses the sharing of ports of edges at the nodes. Normally, if multiple edges are adjacent to the same node, and the arrow head of all these edges has the same visual appearance (color, size, etc.), then these edges may share a port at a node, i.e. only one arrow head is draw, and all edges are incoming into this arrow head. This allows to have many edges adjacent to one node without getting confused by too many arrow heads. If no port sharing is used, each edge has its own port, i.e. its own place where it is adjacent to the node. Default is yes. */ enum decision port_sharing; /* Arrow mode fixed (default) should be used, if port sharing is used, because then, only a fixed set of rotations for the arrow heads are used. If the arrow mode is free, then each arrow head is rotated individually to each edge. But this can yield to a black spot, where nothing is recognizable, if port sharing is used, since all these qdifferently rotated arrow heads are drawn at the same place. If the arrow mode is fixed, then the arrow head is rotated only in steps of 45 degree, and only one arrow head occurs at each port. Default is fixed. */ enum arrow_mode arrow_mode; /* Treefactor The algorithm tree for downward laid out trees tries to produce a medium dense, balanced tree-like layout. If the tree factor is greater than 0.5, the tree edges are spread, i.e. they get a larger gradient. This may improve the readability of the tree. Note: it is not obvious whether spreading results in a more dense or wide layout. For a tree, there is a tree factor such that the whole tree is minimal wide. Default is 0.5. */ float treefactor; /* Spreadlevel This parameter only influences the algorithm tree, too. For large, balanced trees, spreading of the uppermost nodes would enlarge the width of the tree too much, such that the tree does not fit anymore in a window. Thus, the spreadlevel specifies the minimal level (rank) where nodes are spread. Nodes of levels upper than spreadlevel are not spread. Default is 1. */ int spreadlevel; /* Crossing weight specifies the weight that is used for the crossing reduction: bary (default), median, barymedian or medianbary. We cannot give a general recommendation, which is the best method. For graphs with very large average degree of edges (number of incoming and outgoing edges at a node), the weight bary is the fastest method. With the weights barymedian and medianbary, equal weights of different nodes are not very probable, thus the crossing reduction phase 2 might be very fast. Default is bary. */ enum crossing_type crossing_weight; /* Crossing phase2 is the most time consuming phase of the crossing reduction. In this phase, the nodes that happen to have equal crossing weights are permuted. By specifying no, this phase is suppressed. Default is yes. */ enum decision crossing_phase2; /* Crossing optimization is a postprocessing phase after the normal crossing reduction: we try to optimize locally, by exchanging pairs of nodes to reduce the crossings. Although this phase is not very time consuming, it can be suppressed by specifying no. Default is yes. */ enum decision crossing_optimization; /* View allows to select the fisheye views. Because of the fixed size of the window that shows the graph, we normally can only see a small amount of a large graph. If we shrink the graph such that it fits into the window, we cannot recognize any detail anymore. Fisheye views are coordinate transformations: the view onto the graph is distort, to overcome this usage deficiency. The polar fisheye is easy to explain: assume a projection of the plane that contains the graph picture onto a spheric ball. If we now look onto this ball in 3 D, we have a polar fisheye view. There is a focus point which is magnified such that we see all details. Parts of the plane that are far away from the focus point are demagnified very much. Cartesian fisheye have a similar effect; only the formula for the coordinate transformation is different. Selecting cfish means the cartesian fisheye is used which demagnifies such that the whole graph is visible (self adaptable cartesian fisheye). With fcfish, the cartesian fisheye shows the region of a fixed radius around the focus point (fixed radius cartesian fisheye). This region might be smaller than the whole graph, but the demagnification needed to show this region in the window is also not so large, thus more details are recognizable. With pfish the self adaptable polar fisheye is selected that shows the whole graph, and with fpfish the fixed radius polar fisheye is selected. Default is normal view. */ enum view view; /* Edges no suppresses the drawing of edges. Default is yes. */ enum decision edges; /* Nodes no suppresses the drawing of nodes. Default is yes. */ enum decision nodes; /* Splines specifies whether splines are used to draw edges (yes or no). As default, polygon segments are used to draw edges, because this is much faster. Note that the spline drawing routine is not fully validated, and is very slow. Its use is mainly to prepare high quality PostScript output for very small graphs. Default is no. */ enum decision splines; /* Bmax set the maximal number of iterations that are done for the reduction of edge bendings. Default is 100. */ int bmax; /* Cmin set the minimal number of iterations that are done for the crossing reduction with the crossing weights. The normal method stops if two consecutive checks does not reduce the number of crossings anymore. However, this increasing of the number of crossings might be locally, such that after some more iterations, the crossing number might decrease much more. Default is 0. */ int cmin; /* Cmax set the maximal number of interactions for crossing reduction. This is helpful for speeding up the layout process. Default is -1, which represents infinity. */ int cmax; /* Pmin set the minimal number of iterations that is done with the pendulum method. Similar to the crossing reduction, this method stops if the `imbalancement weight' does not decreases anymore. However, the increasing of the imbalancement weight might be locally, such that after some more iterations, the imbalancement weight might decrease much more. Default is 0. */ int pmin; /* Pmax set the maximal number of iterations of the pendulum method. This is helpful for speedup the layout process. Default is 100. */ int pmax; /* Rmin set the minimal number of iterations that is done with the rubberband method. This is similar as for the pendulum method. Default is 0. */ int rmin; /* Rmax set the maximal number of iterations of the rubberband method. This is helpful for speedup the layout process. Default is 100. */ int rmax; /* Smax set the maximal number of iterations of the straight line recognition phase (useful only, if the straight line recognition phase is switched on, see attribute straight.phase). Default is 100. */ int smax; /* Generic values. */ node node; edge edge; /* List of nodes declared. Pointer. */ node *node_list; /* List of edges declared. Pointer. */ edge *edge_list; }; /* Graph typedefs. */ typedef struct graph graph; void new_graph (graph *g); void new_node (node *n); void new_edge (edge *e); void add_node (graph *g, node *n); void add_edge (graph *g, edge *e); void add_colorentry (graph *g, int color_idx, int red_cp, int green_cp, int blue_cp); void add_classname (graph *g, int val, const char *name); void add_infoname (graph *g, int val, const char *name); void open_node (FILE *fout); void output_node (node *n, FILE *fout); void close_node (FILE *fout); void open_edge (edge *e, FILE *fout); void output_edge (edge *e, FILE *fout); void close_edge (FILE *fout); void open_graph (FILE *fout); void output_graph (graph *g, FILE *fout); void close_graph (graph *g, FILE *fout); #endif /* VCG_H_ */