function updateGene(cellList, geneList) { let totalGenes = 0; for (let cell of cellList) { totalGenes += cell.elements.length; } let geneIndex1 = Math.floor(Math.random() * totalGenes); let gene = null; let cell = null; let cellGenes = null; let cumulative = 0; for (let c of cellList) { cumulative += c.elements.length; if (geneIndex1 < cumulative) { cell = c; cellGenes = cell.elements; let geneIndex2 = Math.floor(Math.random() * cellGenes.length); gene = cellGenes[geneIndex2]; break; } } if (Math.random() < pMutation) { //Mutate the gene and update the cell stats generateGene(gene); refreshCellStats(cell); } if (gene.defector > 0) { //Check for defenders who might prevent defector reproduction let blocked = false; for (let i = 0; i < defenderCheck; i++) { let other = cellGenes[Math.floor(Math.random() * cellGenes.length)]; if (other != null) { // If the selected other is a defender, and isn't a copy... if (other.defender > 0 && gene.value != other.value && Math.random() < pDefend) { blocked = true; break; } } if (cellGenes.length <= 0) { cell.fail = true; } else { cell.fail = false; } } if (!blocked) { //If the gene isn't blocked, it copies itself and we update cell stats let child = {}; if (Math.random() < pMutation) { generateGene(child); } else { copyGene(gene, child); } cellGenes.push(child); refreshCellStats(cell); } } // If we're updating the entire cell... if (Math.random() < pCellUpdate) { // Cells only reproduce with enough functional genes, also // We only attempt cell reproduction if we land on a good gene // Because useless genes gum up the machinery of cell reproduction by focusing on themselves // And therefore suppress reproduction in proportion to their appearance if (cell.functional > minFunctional) { //And the cell has enough genes to reproduce... let otherIndex = Math.floor(Math.random() * cellCount); let other = cellList[otherIndex]; if (cell.fitness > other.fitness) { replaceCell(cell, other); } } } // If a cell has a non-functional gene count or has bad luck, then maybe it dies instead if (cell.functional <= minFunctional || cell.fitness <= minFitness || Math.random() < pDeath) { for (let i = 0; i < 10; i++) { //Where 10 is a sanity check to prevent endless looping let otherIndex = Math.floor(Math.random() * cellCount); let other = cellList[otherIndex]; if (other.functional > minFunctional && other != cell) { replaceCell(other, cell); break; } } } }