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--- user-manual:ch02s05 [2024/04/12 11:31] – created gaetan
+++ user-manual:ch02s05 [2024/04/29 15:18] (current) – removed gaetan
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-==== 2.5. Import and Export Formats: MTG - Multiscale Tree Graph ====
-EXAMPLE - Importing and Using MTG data in GroIMP
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-**NOTE**: In this example, a .mtg file is already imported and a .rgg file has already been added into the project.
-Begin at step 1 if you wish to find out how to load a .mtg file into GroIMP.
-Skip to step 6 if you wish to know how to modify the loaded MTG data in this example project.
-- Start GroIMP
-- Click on 'File -> Open'. Select a .mtg file.
-- A file '<name of MTG file selected>-generated.xl' is generated.
-- 2 files appear in GroIMP's file explorer:
-<name of MTG file selected>-generated.xl
-<name of MTG file selected>.mtg
-- The naming of standard MTG attributes can be seen in the commented section at the beginning of the generated .xl file. In this case, <name of MTG file selected>-generated.xl
-- To determine if a feature value was specified in the file, use function to return a boolean. E.g.
-hasXX()
-hasdist()
-...
-- In the 3D view, select "View -> Scales -> Scale 3".
-Add a .rgg file
-- In GroIMP's File Explorer (below the 3D view), click on 'Add File'.
-- Select '<name of RGG file selected>.rgg'.
-- Click save in GroIMP's text editor view. <name of RGG file selected>.rgg should be successfully compiled now.
-Save as project
-- In GroIMP's main top menu bar, click File->Save.
-- Save the project as .gsz file.
-- Write a method/function (e.g. run() in this example) in the .rgg file to modify the data.
-- Once the .rgg file is saved and compiled, a new set of modules are generated in the .xl file and compiled.
-- The nodes in the graph are replaced with the new modules in the .xl file.
-- Turn "View -> Scales -> Scale X" off and on to refresh the 3D view. (where X is the scale you want to visualize)
-- Execute the method/function you wrote (e.g. run() in this example) by clicking on the button with the method name.
-- Move or rotate the 3D view to refresh and visualize the changes you have made.
-  - Open an MTG file
-  - MTG node classes and corresponding GroIMP modules
-  - MTG feature attributes and GroIMP module variables
-  - Visualizing the MTG data
-  - Saving the MTG graph in a GroIMP project
-  - Modifying the loaded MTG graph