changelog.txt

GeneTrees
----------

0.0.0 - Unknown (sometime around 5/xx/2016)
-Not much to see here
-Basics of java swing set up

0.1.0 - 3/23/17
-Redone pretty much everything
-Environment:
--TreeNode
---A node, (potentially) with children
---One of several different types: leaf, structure, root, watercatcher
---Contains "genes"
--GeneTree
---A wrapper for a tree of TreeNodes
---Contains cached data to compute evolution faster
---Contains paint methods and collision checking methods
--SunSpeck
---Essentially just a wrapper for a triplet of values
---xPos, yPos, and "fitness" which is essentially the value of the speck
---Greater fitness in a speck -> greater fitness when absorbed
-Controls:
--Some fairly lame keyboard controls, no real interface yet
--Keys are mapped to skip various lengths of time (i.e., number of ticks)
--Rendering is disabled while skipping in order to compute efficiently as possible
-Fitness calculations:
--SunSpecks spawn at top of screen with 10,000 fitness, losing 20 fitness each tick as they descend
--Leaf nodes generate no fitness unless they collide with a sunspeck, then absorbing its fitness
--Each node costs 1 fitness per tick
--Root nodes generate 2 fitness per tick when underground

0.2.0 - 3/23/17
-Pressing "D" now toggles debug mode
--Displays fitness level of sunspecks
--Displays bounding boxes of nodes
-Eliminated printing to console the time to mutate (it was insignificant)
-Nodes now cost fitness per tick proportional to their size
-Root nodes generate fitness proportional to their size
-SunSpecks are tripled in power so that leaves are competitive
-Fitness is now represented by a long instead of an int

0.3.0 - 3/24/17
-Added load/save (F1 to save, F2 to load)

0.3.1 - 3/24/17
-Added continuous generation with regular saving
-Added more instruction strings
-A few other small bugfixes

0.4.0 - 3/29/17
-Roots now gather nutrients, leaves now gather sunlight
-Fitness is created using a 1:1 ratio of nutrients and sunlight
-This requires trees to have both leaves and roots
-A structure node may now have no more than 4 root children
-Structure nodes now have a 25% chance of adding a child on mutation,
	and a decreasing chance of adding even more children
-Nodes now passively consume half of the fitness they did previously
-The top tree in each generation is now rendered on completion of each generation

0.5.0 - 3/30/17
-Separated the simulation environment into its own class, Simulation
-the "Simulation" class doubles as a Thread extension and just a container
-Simulation can be ticked manually as if not its own thread, or it can
	be run as its own thread, causing it to run through its maximum
	number of ticks automatically.
-Added multithreading support.
--Best configuration on Dell XPS 15Z is 6 threads, 5ms pause between thread checks
-Added command line args
--First argument is the number of threads to use
--Second argument is time between thread checks, in ms

0.5.1 - 9/16/17
-Revamped the threading system, now that I understand how threads work
--The main thread now divides up the remaining unsimulated trees into piles, one pile for each Simulation thread
--Each thread goes through its pile of trees, then ends
--The main thread join() each of the Simulation threads (no more busy waiting)
-Substantial performance improvement

0.6.0 - 11/7/17
-Added the GraphPanel module from UrfUtils