Tulip graph format

Nodes
The nodes are stored with a list of indices. The indices must be non negative integers.
Syntax

(nodes id_node1 id_node2 ...)

Sample :

(nodes 0 1 2 3 4 5 )

Edges
An edge is defined by providing three non negative integers. The first is the id of the edge, the second is the id of source node of the edge and the third is the id of target node of the edge.
Syntax

(edge id id_source id_target)

Sample

(edge 2 2 1)

It defines one edge with the node that has the id 2 as source and the node that has the id 1 as target.

Clusters
A cluster is defined by an integer which represent the cluster id, one string which is the name of the cluster(Two clusters can have the same name). Then it is define with a list of nodes and a list of edges. To define a subcluster we use the same method. One important point is that the id zero is reserved for the root graph (thus it cannot be used).
Syntax

(cluster id name
  (nodes id_node1 id_node2 ...)
  (edges id_edge1 id_edge2 ...)
  (cluster id name
    (nodes id_node1 id_node2 ...)
    (edges id_edge1 id_edge2 ...)
  )
)

Sample

(cluster 3 "cluster"
  (nodes 1 2 3 )
  (edges 2 8 )
  (cluster 4 "Sub Cluster"
    (nodes 1 2 )
    (edges 2 )
  )
)

Definitions of properties
The definition of properties is the following:
Syntax

(property cluster_id property_type "property_name"
  (default "default_node_value" "default_edge_value" )
  (node id value)
  ...
  (edge id value)
  ...
)

Sample

(property  0 bool "viewSelection"
  (default "false" "false" )
  (node 1 "true")
  (node 2 "true")
  (node 3 "true")
  (edge 2 "true")
  (edge 8 "true")
)

Property Type
layout : This type enables to store nodes position in 3D. The position of nodes is defined by a set of 3 doubles (x_coord,y_coord,z_coord). The position of edges is a list of 3D points. These points are the bends of edges. ((x_coord1,y_coord1,z_coord1)(x_coord2,y_coord2,z_coord2))
size : This type enables to store the size of elements. The size is defined with a sequence of three double. (width,heigth,depth)
color : This type enables to store the color of elements. The color is defined with a sequence of four integer from 0 to 255. (red,green,blue,alpha)
string : This enables to store text on elements.
metric : This enables to store real on elements.
bool : This type enables to store boolean on elements.
int : This type enables to store integers on elements.

Properties of Tulip
viewSelection 	type : bool, this property is the one used for selected elements in Tulip.

(property  0 bool "viewSelection"
  (default "false" "false" )
  (node 1 "true")
  (node 2 "true")
  (node 3 "true")
  (edge 2 "true")
  (edge 8 "true")
)

viewLayout 	type : layout, this property is the one used for displaying graph in Tulip.

(property  0 layout "viewLayout"
  (default "(0,0,0)" "()" )
  (node 1 "(10,10,10)")
  (node 2 "(20,20,20)")
  (edge 1 "(15,15,15)(25,25,25)")
)

viewColor 	type : color, this property is the one used for coloring graphs in Tulip.

(property  0 color "viewColor"
  (default "(235,0,23,255)" "(0,0,0,0)" )
  (node 1 "(200,0,200,255)")
  (node 2 "(100,100,0,255)")
  (node 3 "(100,100,0,255)")
  (edge 2 "(200,100,100)")
)

viewLabel 	type : string, this property is the one used for labeling the graphs in Tulip(in label mode).

(property  0 string "viewLabel"
  (default "" "" )
  (node 1 "Hello")
  (node 2 "Bonjour")
  (node 3 "Bye")
  (edge 2 "Aurevoir")
)

viewSize 	type : size, this property is the one used for the size of elements displayed.

(property  0 size "viewSize"
  (default "(0,0,0)" "(1,1,1)" )
  (node 1 "(10,10,10)")
  (node 2 "(20,20,20)")
)

viewShape 	type : int, this property is used for defining the shape of elements.

(property  0 int "viewShape"
  (default "0" "0" )
  (node 1 "1")
  (node 2 "2")
)

viewTexture 	
viewMetaGraph 	
viewRotation 	

GlScene
Scene structure are stored with a xml structure.
First, scene's data (viewport and background color) are store in data element
Syntax

<data>
  <viewport>(x,y,width,height)</viewport>
  <background>(red,green,blue,alpha)</background>
</data>

After, scene children are store in children element
GlLayer and GlComposite have two elements : data and children
All others glEntities have one element : data
The scheme of glScene xml are (for example) :

<scene>
  <data>
    ...
  </data>
  <children>
    <LayerName1 type="GlLayer">
      <data>
	...
      </data>
      <children>
	...
      </children>
    </LayerName>
    <LayerName2 type="GlLayer">
      <data>
	...
      </data>
      <children>
	<EntityName type="EntityType">
	  <data>
	    ...
	  </data>
	</EntityName3>
      </children>
    </LayerName2>
  </children>
</scene>

For glEntities data see .cpp file