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enable full sized snake genome

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This commit is contained in:
Michael Peters 2024-09-04 21:04:47 -07:00
parent b33ffc3baa
commit a69af98250
3 changed files with 15 additions and 19 deletions
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2
src/site/snake/canvas.ts
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@ -135,6 +135,8 @@ export default function runCanvas(canvas: HTMLCanvasElement, pipeRef: MutableRef
const STARVE_STEPS = BOARD_SQUARES * 6; const STARVE_STEPS = BOARD_SQUARES * 6;
// neat configuration ------------------------------------------------------ // neat configuration ------------------------------------------------------
// TODO: this configuration is not learning
// figure out why, maybe scoring is not proper -- or speciation is too forced
const FC: FertilityConfig = { const FC: FertilityConfig = {
fertile_threshold: 0.6, fertile_threshold: 0.6,
champion_min_species_size: 3, champion_min_species_size: 3,

24
src/site/snake/neat-snake-brain.ts
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@ -25,10 +25,10 @@ const FEATURES = {
HEAD_Y: 'HEAD_Y', HEAD_Y: 'HEAD_Y',
APPLE_REL_X: 'APPLE_REL_X', APPLE_REL_X: 'APPLE_REL_X',
APPLE_REL_Y: 'APPLE_REL_Y', APPLE_REL_Y: 'APPLE_REL_Y',
// TAIL_ABOVE: 'TAIL_ABOVE', TAIL_ABOVE: 'TAIL_ABOVE',
// TAIL_BELOW: 'TAIL_BELOW', TAIL_BELOW: 'TAIL_BELOW',
// TAIL_LEFT: 'TAIL_LEFT', TAIL_LEFT: 'TAIL_LEFT',
// TAIL_RIGHT: 'TAIL_RIGHT', TAIL_RIGHT: 'TAIL_RIGHT',
}; };
const OUTPUTS = { const OUTPUTS = {
U: 'U', U: 'U',
@ -43,10 +43,10 @@ const _BASE_GENOME_SNAKE_BRAIN_NEAT_EDGES = completeBipartiteEdges(
FEATURES.HEAD_Y, FEATURES.HEAD_Y,
FEATURES.APPLE_REL_X, FEATURES.APPLE_REL_X,
FEATURES.APPLE_REL_Y, FEATURES.APPLE_REL_Y,
// FEATURES.TAIL_ABOVE, FEATURES.TAIL_ABOVE,
// FEATURES.TAIL_BELOW, FEATURES.TAIL_BELOW,
// FEATURES.TAIL_LEFT, FEATURES.TAIL_LEFT,
// FEATURES.TAIL_RIGHT, FEATURES.TAIL_RIGHT,
], ],
[OUTPUTS.U, OUTPUTS.D, OUTPUTS.L, OUTPUTS.R], [OUTPUTS.U, OUTPUTS.D, OUTPUTS.L, OUTPUTS.R],
); );
@ -108,10 +108,10 @@ export class NEATSnakeBrain {
act.set(FEATURES.HEAD_Y, head.y); act.set(FEATURES.HEAD_Y, head.y);
act.set(FEATURES.APPLE_REL_X, appleRel.x); act.set(FEATURES.APPLE_REL_X, appleRel.x);
act.set(FEATURES.APPLE_REL_Y, appleRel.y); act.set(FEATURES.APPLE_REL_Y, appleRel.y);
// act.set(FEATURES.TAIL_ABOVE, Math.max(...above, BOARD_SQUARES)); act.set(FEATURES.TAIL_ABOVE, Math.max(...above, BOARD_SQUARES));
// act.set(FEATURES.TAIL_BELOW, Math.max(...below, BOARD_SQUARES)); act.set(FEATURES.TAIL_BELOW, Math.max(...below, BOARD_SQUARES));
// act.set(FEATURES.TAIL_LEFT, Math.max(...left, BOARD_SQUARES)); act.set(FEATURES.TAIL_LEFT, Math.max(...left, BOARD_SQUARES));
// act.set(FEATURES.TAIL_RIGHT, Math.max(...right, BOARD_SQUARES)); act.set(FEATURES.TAIL_RIGHT, Math.max(...right, BOARD_SQUARES));
this.brain.think(act); this.brain.think(act);

8
src/site/snake/neat.ts
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@ -594,18 +594,12 @@ export function mutate(genome: Genome, config: MutateConfig): Genome {
if (Math.random() < new_connection_rate) { if (Math.random() < new_connection_rate) {
// create a new connection between two *previously unconnected* nodes // create a new connection between two *previously unconnected* nodes
const options = findAcyclicInternalNewConns(newGenome); const options = findAcyclicInternalNewConns(newGenome);
if (options.length === 0) { if (options.length > 0) {
// TODO: remove this warn once this starts working
// this is mostly a sanity check / useful for metrics
console.warn('could not find a valid new connection!');
} else {
// choose a random connection // choose a random connection
const newConn = randchoice(options); const newConn = randchoice(options);
const newGene = mutateNewConn(newConn, assign_mag * randomNegPos()); const newGene = mutateNewConn(newConn, assign_mag * randomNegPos());
newGenome.push(newGene); newGenome.push(newGene);
} }
findAcyclicInternalNewConns(newGenome);
} }
return newGenome; return newGenome;