Net Line
What are net lines
A line, in network simulation terms, is a connection between different nodes in a resource transport and distribution network. Along with the nodes of the network they form a graph.
How net lines relate to the Tygron Platform
In the Tygron Platform, net lines and net nodes, along with net loads, form distribution networks. They are defined by 2 net nodes, a starting node and an end node, and a net line definition. The collection of net lines and net nodes between two arbitrary net nodes is called a path.
Properties of net lines
Net lines have a number of properties, mostly related to visualization. They also allow for the definitions of arbitrary attributes.
Name
The name of the net line is generally not visible to the end user, but can be used to keep track of specific net lines while editing, or could be called up using TQL to display more information to an end user.
Length
The length of the net line is a property resulting from where the net line starts and ends. This property cannot be edited directly, but is calculated based on its coordinates. This calculation only takes flat distance into account. Terrain height is not taken into account.
Net line definitions
Each net line has a reference to a net line definition. The net line definition's attributes, such as its color or visualization diameter, are inherited by their net lines. This allows a single set of properties to be applied to all lines in the network.
Net Type
The network type this net line belongs to. Each net line can only belong to one type of network.
Attributes
Net lines can have any number of arbitrary attributes. A few attribute names are reserved and have a special function.
DEF_DIAMETER_M: The diameter of the net line. This can be used in calculations and also affects the width of the net line as visible in the 3D World.
FLOW: The flow of a net line indicates the amount of the resource that is transported through this net line. If the network's graph is a tree, the direction is implicit and the value can be consistently positive. In more complicated networks, the direction in which the resource is transported may be relevant, and can be indicated with a positive or negative value. By default, the attribute name FLOW is preferred. The specific attribute name used for this is defined as part of the settings of the net type. Depending on the calculation model for networks, this attribute is used in resource flow calculations.
VISUALIZATION_DIAMETER_M: The diameter of the net line. Similar to DEF_DIAMETER_M, this attribute affects the visualized width of the net line in the 3D World, but is not intended to be used in calculations.
Adding and editing net lines
It is possible to edit the net lines of the network, but also to import net lines into the project.
Manually editing
It is possible to manually edit the network by creating, moving, and removing the lines which make up the full network.
The network drawing too will be visible at the bottom of the screen.
Modes
The following modes are available.
Add
Draw a new line between 2 indicated locations in the 3D world. The first time you click in the world, you select that location as the first end of your new new line. When you click in a second location, a net line is created between the first and the second location. The second location is then treated as the starting point for your next net line. Each line you create this way will be connected.
Remove
Click on any line in the 3D world to delete it.
Move
Click and hold down the left mouse button on any endpoint of a net line, then drag the mouse and release the left mouse button. The net line's end point will be moved to the location you dragged it to. If multiple net lines share the same end point, each of those net lines will now have their endpoint on that new location.
Options
To fine-tune how the editing options work, some configuration settings are available.
Connect via roads
If checked, the path between the start node and the end node is calculated dynamically to only travel via terrain with the pipes permitted property. In general, this is functionally the same as only using roads. More nodes will be placed where required, connected with net lines. If unchecked, a net line will be created directly connected the indicated nodes. I.e. as the crow flies. (This option is not available while removing.)
Repeated
If checked, when a net line is removed, if due to that removal net lines are left which are dead ends, those net lines are removed as well until all those dead ends are removed. This means that long stretches comprised of multiple net lines can be removed as though they were a single net line, up to the point where they branch off into other net lines. If unchecked, only the specific net line clicked will be removed. (This option is only available while removing.)
Merge
If checked, when you place a node very close to another node in the 3D world of the same network, the existing node will be used in place of the otherwise newly placed node. This means that when you're drawing a line and the endpoint of the net line is drawn very close to an existing node, the line you're drawing will "snap" onto the existing node. If unchecked, a new node will always be created, no matter how close to an existing node the new node is placed. (This option is not available while removing.)
Show Constructions
If checked, this constructions will remain visible while drawing. If unchecked, constructions will be hidden so you can place nodes more easily.
Net Type
This is the network currently being edited. Only the network being edited is visible in the 3D world. You can only select networks for which net line definitions exist.
NetLine Def
This is the type of net line being placed while drawing new net lines.
Distance
This is the distance for merging nodes. If the endpoint of a net line is placed within this distance from an existing net node, the existing net node is used.
Node Size
This is the size used to visualize net nodes while drawing net lines. This is only for clarity while editing, and when editing concludes the net nodes revert o their normal size.
Importing GeoJSON
It is possible to import a geojson file to add net lines to a project.
It is also possible to select the option of importing data in the Net wizard. In both cases, it is recommended to import all network geojson files at the same time where possible: net lines, net line definitions, and net loads.
The net lines GeoJSON file should be composed of line data with the following attributes.
| Attribute | Description | Example | Remark |
|---|---|---|---|
| NAME | The name of the net load. | NetLoad 49 | |
| NET_TYPE | The type of network this net load belongs to | HEAT | Note that when connecting net loads and net nodes or net lines of different network types while importing, this is considered incorrect input and behavior of the Tygron Platform will be undefined. |
| TYPE_ID | The net line definition this net line should be based on | HEAT | This TYPE_ID should match the ID of one of the simultaneously imported net line definitions. Note that when no net line definition file is being uploaded in the same upload action, this attribute is ignored and the first net line definition of the appropriate net type is used. If none exist, a single net line definition is created and used for all net lines imported of the same net type. |
| START_NODE_ID | The identifying number at one end of the net line | 15 | Net lines are connected at the ends where START_NODE_ID of one net line matches the START_NODE_ID or END_NODE_ID of another net line, and END_NODE_ID of one net line matches the START_NODE_ID or END_NODE_ID of another net line. Note that for the relevant ends of the net lines the coordinates should be close to one another. The START_NODE_ID and END_NODE_ID of a single net line should never be the identical. If the value is unique among all START_NODE_IDs and END_NODE_IDs the net line has an end from where no further net lines continue. |
| END_NODE_ID | The identifying number at the other end of the net line | 16 |