1 files changed, 16 insertions, 0 deletions
diff --git a/src/genome/genome.js b/src/genome/genome.js
index c288d02..7688b32 100644
--- a/src/genome/genome.js
+++ b/src/genome/genome.js
@@ -88,3 +88,19 @@ export function mut_gene_weight(weight_max, gene, r) {
     clamp(new_weight, -weight_max, weight_max),
   ];
 }
+
+
+export function mut_genome_expand(
+  [n_input, n_internal, n_output, genome], r
+) {
+  const expand_index = Math.floor(n_internal * r) + n_input;
+  const new_genome = genome.map(([source, sink, weight]) => [
+    source >= expand_index ? source+1 : source,
+    sink >= expand_index ? sink+1 : sink,
+    weight,
+  ]);
+
+  return [
+    n_input, n_internal+1, n_output, new_genome,
+  ];
+}