**Improving leaf shape in the simple tomato model**

For improved leaf shape, we can define the leaf contour using a mathematical model.
Below is the implementation of a simplified version; for the full equation, see [[https://doi.org/10.14214/sf.7740|Coussement et al. (2018)]].

To add the leaf shape function into the model, open the ''simple_tomato_growth_sdau.gsz'' example and copy the code below inside the ''modules_organs.rgg'' file.

<code java>
module Leaflet(float length, double width)
{	
} ==> 
[
    { 
        int segments = 100; 
    } 

    for (double i=1; i < segments; i++)
    (
        {
            double segmentLength;
            segmentLength = length/segments;
            // getNormalizedLeafWidth specifies the half of the shape
            double segmentWidth = 0.5*width * getNormalizedLeafWidth(1 - i/segments);
        }
		
        Parallelogram(segmentLength, 2*segmentWidth).(setShader(GREEN))
		        
        RL(60.0/segments)
    )
];

// calculate leaf shape as the normalized width along the midrib, 
// full model: Coussement et al. 2018
// https://doi.org/10.14214/sf.7740
static double getNormalizedLeafWidth(float lnorm) {
	
    double k1 = 2;
    double k2 = 2.2;
	
    double gL = 0;
	
    double maxWidth = 0.6;
	
    if (lnorm <= maxWidth) {
        gL = 1 - Math.pow((maxWidth - lnorm)/maxWidth,k1);	
        } else {
            gL = 1 - Math.pow((lnorm - maxWidth)/(1 - maxWidth),k2);
        }
	
        return gL;
    }
</code>

Then, inside the definition of ''module Leaf'', replace every occurrence of ''Parallelogram'' by ''Leaflet''.

Updated model:
  * {{ :workshops:simple_tomato_growth_niceleaflet_sdau.gsz |}}

**Modelling with L-systems.**

Slides:
  * {{ :workshops:sdau_practical_3b_groimp_xl.pdf |}}

Model example:
  * {{ :workshops:simple_development_template_sdau.gsz |}}
  * {{ :workshops:lsystems.gsz |}}


**Simple models of development.**

Slides:
  * {{ :workshops:sdau_practical_3_groimp_xl.pdf |}}

Simple development model demonstrating the use of different type of rules.

Model example:
  * {{ :workshops:simple_development_rggrules_sdau.gsz |}}

**Simple tomato crop model.**

Model example:
  * {{ :workshops:simple_tomato_growth_sdau.gsz |}}

//Optional://

How to construct a simple tomato architecture model.

Tutorial: [[tutorials:simple-tomato-model|A simple tomato plant model]]

Model examples:
  * {{ :workshops:summer_school_25:02_monday:simple_tomato.gsz |}}
  * {{ :workshops:simple_tomato_textures.gsz |}}
  * {{ :workshops:summer_school_25:02_monday:simple_tomato_mesh.gsz |}}