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--- tutorials:simple-tomato-model [2024/12/06 01:30] – [Improving leaflet shape] ksmolen
+++ tutorials:simple-tomato-model [2024/12/07 16:02] (current) – [A simple tomato plant model] ksmolen
@@ Line 1: / Line 1: @@
 ====== A simple tomato plant model ======
-In this tutorial we will create a simple model of architecture and development of a tomato plant.
+In this tutorial we will create a simple model of a tomato plant architecture.
+===== Preliminary steps =====
+We start a new project by opening a new RGG template model (File -> New -> RGG Project).
+The simple model that we are going to create will have the following structure:
+<code java>
+// modules
+// parameters
+protected void init()
+[
+    Axiom ==>
+        // initial structure
+    ;
+]
+public void run()
+[
+    // rewriting rule
+]
+</code>
 ===== Organs =====
@@ Line 50: / Line 77: @@
 ==== Specifying organ geometry ====
-The geometry of organs will be specified using instantiation rules ''%%==>%%''.
+We extend the modules' definition by adding geometric representation for each organ type. The geometry of organs will be specified using instantiation rules ''%%==>%%''.
 An ''Apex'' will be represented as a red sphere.
@@ Line 118: / Line 145: @@
 module Truss extends Organ
 {
-    length = TRUSS_LENGTH;
+    {length = TRUSS_LENGTH;}
 }
 ==>
@@ Line 172: / Line 199: @@
 </code>
-By applying this rule to an apex 7 times, we create a small plant made of 7 internodes and 7 leaves.
+The turtle command ''RH'' is used to create the phyllotactic pattern of leaves (resulting in their placement around the stem).
+Now that we have specified the ''Axiom'' inside the ''init()'' method and a rewriting rule for the ''Apex'' inside the ''run()'' method, we can run the model by clicking on the ''run'' button in the RGG Toolbar, placed above the 3D View.
+By applying the above rule to an apex 7 times, we create a small plant made of 7 internodes and 7 leaves.
 In tomato, after a certain number of phytomers (internodes with leaves), specified by a parameter ''NB_VEG_PHYTOMERS'', primary shoot turns into a sympodial shoot, that bears trusses with fruits. For this sympodial shoot, a repetitive pattern with 3 leaves and 1 truss with fruits is typical in many (high-wire) tomato cultivars.
-We first specify a new parameter for the number of phytomers in a primary shoot:
+We first specify a new parameter for the number of phytomers in primary shoot:
 <code java>
@@ Line 251: / Line 282: @@
 For an example on how to generate a leaflet mesh, see the tutorial [[:Tutorials:leaf-triangulation| Leaf triangulation ]].
+We use the code from the leaf triangulation tutorial to create a leaflet mesh ''MeshNode.(setPolygons(polygonMesh))'', where the polygons (''polygonMesh'') are created from a list of predefined vertices (''vertexDataLeaflet'').
+To use the leaflet mesh in our tomato model, we create a new module for leaflet:
+<code java>
+module Leaflet(double length)
+==>
+    RL(90) Scale(length, length, 0.01) MeshNode.(setPolygons(polygonMesh), setShader(GREEN))
+;
+</code>
+Then we replace ''Parallelogram''-s in the Leaf module by the newly defined ''Leaflet''-s:
+{{ :tutorials:simpletomatoleafletsmesh_crop.png?150|}}
+<code java>
+module Leaf extends Organ
+{
+    ...
+}
+==>
+    ...
+    // leaflet pairs
+    for (int i:1:NB_LEAFLET_PAIRS) (
+        [RU(-80) RL(-30) Cylinder(0.04, 0.003) RL(40) Leaflet(0.1)]
+        [RU( 80) RL(-30) Cylinder(0.04, 0.003) RL(40) Leaflet(0.1)]
+        RL(20)
+        Cylinder(segmentLength, 0.003)
+    )
+    // terminal leaflet
+    Leaflet(segmentLength)
+;
+</code>