Update RNG.

1 files changed, 9 insertions, 1 deletions

diff --git a/rules.js b/rules.js
index 344feb5..12d9630 100644
--- a/rules.js
+++ b/rules.js
@@ -45,7 +45,9 @@ let states = {}
 let game = null
 
 function random(n) {
-	return Math.floor(((game.seed = game.seed * 48271 % 0x7fffffff) / 0x7fffffff) * n)
+	if (game.rng === 1)
+		return Math.floor(((game.seed = game.seed * 48271 % 0x7fffffff) / 0x7fffffff) * n)
+	return (game.seed = game.seed * 200105 % 34359738337) % n
 }
 
 function logbr() {
@@ -3430,6 +3432,11 @@ exports.setup = function (seed, scenario, options) {
 		where: null,
 		killed_heirs: { Lancaster: 0, York: 0 },
 	}
+
+	// Old RNG for ancient replays
+	if (options.rng)
+		game.rng = options.rng
+
 	if (scenario === "Wars of the Roses")
 		setup_game()
 	else if (scenario === "Kingmaker")
@@ -3438,6 +3445,7 @@ exports.setup = function (seed, scenario, options) {
 		setup_richard_iii()
 	else
 		throw new Error("Unknown scenario:", scenario)
+
 	log("Scenario: " + scenario)
 	start_campaign()
 	return game