Module step function

A module should have a step function with this header step : ( t, substrates ) -> where t is the current time and substrates is an object with all the substrates. It should return an object with all the modified substrate deltas.

Example

Let's say you have four substrates and three modules:

Substrates

• enzym that breaks down food
• food outside
• food inside
• transporter enzym that transports food

test = new Cell()
test.add_substrate( 'enzym', 1 )
test.add_substrate( 'food_out', 100 )
test.add_substrate( 'food_in', 0 )
test.add_substrate( 'transp', 0 )

Modules

• module that creates transporters from nothing ( magix )
• module that transports food inside the cell
• module that breaks down food with enzym

create_transport = {
  step : ( t, substrates ) ->
    { 'transp' : 1 }
}

transport_food = {
  step : ( t, substrates ) ->
    transp = substrates.transp
    food_out = substrates.food_out
    transport = Math.min( transp, Math.max( 0, food_out ) )
    { 'food_out' : -transport, 'food_in' : transport }
}

food_enzym = {
  step : ( t, substrates ) ->
    food_in = substrates.food_in
    enzym = substrates.ezym
    process = Math.min( enzym, Math.max( 0, food_in ) )
    { 'food_in' : -process }
}

test.add create_transport
test.add transport_food
test.add food_enzym