goo.growth

class goo.growth.GrowthController(current_volume, growth_type, growth_rate)

Bases: object

set_pressure(pressure)

Set new pressure.

step_divided(current_volume, dt)

Step through the growth controller after division.

step_growth(current_volume, dt)

Step through the growth controller to calculate normal growth.

Returns new pressure.

goo.growth.GrowthType

alias of Growth

class goo.growth.PIDController(current_volume, growth_type=Growth.LINEAR, growth_rate=1, initial_pressure=0.01, target_volume=30, Kp=0.05, Ki=1e-05, Kd=0.5)

Bases: GrowthController

Class to control growth by a PID controller, in which changes to a cell’s internal pressure governs how much it grows in the next frame.

Variables:

• growth_type (Growth) – Type of growth exhibited by cells.

• growth_rate (float) – Rate of growth of cells.

• initial_pressure (float) – Initial pressure of cells.

• target_volume (float) – Target volume of cells.

• Kp (float) – P variable of the PID controller.

• Ki (float) – I variable of the PID controller.

• Kd (float) – D variable of the PID controller.

copy()

set_pressure(pressure)

Set new pressure.

step_divided(new_volume)

Step through the growth controller after division.

step_growth(current_volume, dt)

Step through the growth controller to calculate normal growth.

Parameters:

• current_volume (float) – Current volume of the cell.

• dt (float) – Time step.

Returns:

The pressure at the next time step.

Return type:

float