cobweb2-2019-01-14

Changes

• Added logging to the personalities + coloured cheating agents
• The parallel COBWEB is in the repository (not in this release). The files to run parallel are in cobweb2/src/cobweb2_parallel.

Cobweb2-2018-11-19

Changes

• Personalities as described by the psych people
• Fusion of agents as described by the physics person

cobweb2-2019-06-03

Changes

• Fixed StackOverflowError when gravity not enabled

cobweb2-2018-05-09

Changes

• You can turn on/off prisoners dilemma participation for individual agent types now.

cobweb2-2017-04-21

Swarm Effects

• Improve speed of swarm effect nearby agent calculation
• Rescale swarm effect AI input to provide more useful values to AI

Fixes

• Clear observation trails when loading new simulation
• No more ConcurrentModificationException crash when observing/unobserving agents in running simulation

cobweb2-2017-04-04

Swarm Effects

• Adds modifiers to agent properties based on how many other agents are within a given radius
• Separate effects for every agent type vs agent types nearby
• Effect is a 4 point curve:
  • Min number of agents to start effect
  • First peak of group size, and associated effect value
  • Second peak and associated effect value
  • Max group size for effect to turn off again
  • Effect for group sizes between the points is linearly interpolated
  • Points can be ignored by setting them to same value as next/previous point
• Group radius is used to define which agents are considered part of the group
  • Setting radius larger makes simulation run slower, especially with wrap enabled!

Dynamic Abiotic Factors

• Single Dynamic factor changes value of entire environment over time
• Moving Band factor has two values, background and a moving band
• Band width, edge hardness, start/stop positions, angle and wrap can be configured
• Both factors have configurable cycle period, offset, exponent and loop/ping-pong mode
  • Exponent = 1 means linear transition, <1 means fast-slow-fast, >1 means slow-fast-slow
• Preview now larger, and shows time and value at the center of the field

cobweb2-2017-03-20

Linear Weights AI updates

• Fix bug: Linear Weights AI + learning no longer makes weights run into infinity and freeze the agents f94f834
• Linear Weights AI now has separate matrix for every agent type
• Fix bug: First generation of agents with LW AI no longer share and modify the same brain
• Add Facing N/E/S/W inputs into LW matrix to allow forcing agent flow
• ⚠ Warning: Old simulations using LW AI will be upgraded automatically, and the files will no longer be usable in the old version! Keep a separate copy of the file if you need to use it in the old version again.

cobweb2-2016-08-05

• Agents appear as green when affected by toxins
• Logs the number of agents affected by toxins
• Fixed bug where toxins are not logged properly on first tick

cobweb2-2016-06-11

Fixes population loading with learning, toxin and waste settings

cobweb2-2016-04-29

Learning

• Completely replaces the old learning agents
• Fitness function is minimizing energy losses
• Future outcomes of decisions with high energy losses are randomly modified
• Phenotypes are available to change various learning parameters

Consumption of products

• Producer uses energy to create product
• Producer can only keep N unsold products
• Consumer can pay producer for product
• Consumer will receive temporary multiplier to one of its attributes

Toxins

• Agents start with an initial amount
• Toxin amount can decrease by fraction specified per time step
• Effect on phenotypes, with multiplier and starting threshold
• Foods can contain different amounts of toxins for every agent
• Percentage transferred when eating other agents
• Percentage transferred to child
• Average population toxin level logged

Regional log file

• Logs agent and food population into a TSV file
• Numbers include cell totals for all agents and individual types
• Added option to scale bar graphs on global or local basis

Waste as food

• Agents can consume specific waste types
• Energy gained (or lost if negative) is definable
• Adds another energy event on the energy overlay

Fix loading of population

• Loading populations used to not load genetics, abiotic, and other plugin factors
• Loading works correctly now, with some limitations
• New simulation must have similar-enough global settings to original simulation
• Error will be shown when incompatible, with option to skip incompatibilities or abort