X-Git-Url: https://git.localhorst.tv/?a=blobdiff_plain;f=resources%2Fjs%2Fhelpers%2Falttp-ram.js;fp=resources%2Fjs%2Fhelpers%2Falttp-ram.js;h=2ae71cf58f48b857aa2b8a14fa6b1311f4d0fc37;hb=73c29bf37f10df401d87d14cc26999f88ce77379;hp=0000000000000000000000000000000000000000;hpb=2ba39c5f4632579146d2663d82149a156a4e96c1;p=alttp.git

diff --git a/resources/js/helpers/alttp-ram.js b/resources/js/helpers/alttp-ram.js
new file mode 100644
index 0000000..2ae71cf
--- /dev/null
+++ b/resources/js/helpers/alttp-ram.js
@@ -0,0 +1,100 @@
+export const isChestOpen = (data, room, chest) => {
+	if (chest < 4) {
+		return !!(data && (data[2 * room] & Math.pow(2, chest + 4)));
+	} else {
+		return !!(data && (data[(2 * room) + 1] & Math.pow(2, chest - 4)));
+	}
+};
+
+export const hasVisitedQuadrant = (data, room, quadrant) => {
+	return !!(data && (data[2 * room] & Math.pow(2, quadrant - 1)));
+};
+
+export const GT_BASEMENT_CHECKS = [
+	'iceM',
+	'iceL',
+	'iceR',
+	'dmUL',
+	'dmUR',
+	'dmBL',
+	'dmBR',
+	'randoUL',
+	'randoUR',
+	'randoBL',
+	'randoBR',
+	'fireSnake',
+	'mapChest',
+	'hopeL',
+	'hopeR',
+	'bobsChest',
+	'torchSeen',
+	'tileRoom',
+	'compassUL',
+	'compassUR',
+	'compassBL',
+	'compassBR',
+];
+
+export const GT_BASEMENT_ALL = [
+	'iceM',
+	'iceL',
+	'iceR',
+	'dmUL',
+	'dmUR',
+	'dmBL',
+	'dmBR',
+	'randoUL',
+	'randoUR',
+	'randoBL',
+	'randoBR',
+	'fireSnake',
+	'mapChest',
+	'hopeL',
+	'hopeR',
+	'bobsChest',
+	'torch',
+	'torchSeen',
+	'tileRoom',
+	'compassUL',
+	'compassUR',
+	'compassBL',
+	'compassBR',
+];
+
+export const getGTBasementState = (data) => ({
+	iceM: isChestOpen(data, 0x1C, 0),
+	iceL: isChestOpen(data, 0x1C, 1),
+	iceR: isChestOpen(data, 0x1C, 2),
+	dmUL: isChestOpen(data, 0x7B, 0),
+	dmUR: isChestOpen(data, 0x7B, 1),
+	dmBL: isChestOpen(data, 0x7B, 2),
+	dmBR: isChestOpen(data, 0x7B, 3),
+	randoUL: isChestOpen(data, 0x7C, 0),
+	randoUR: isChestOpen(data, 0x7C, 1),
+	randoBL: isChestOpen(data, 0x7C, 2),
+	randoBR: isChestOpen(data, 0x7C, 3),
+	fireSnake: isChestOpen(data, 0x7D, 0),
+	mapChest: isChestOpen(data, 0x8B, 0),
+	hopeL: isChestOpen(data, 0x8C, 1),
+	hopeR: isChestOpen(data, 0x8C, 2),
+	bobsChest: isChestOpen(data, 0x8C, 3),
+	torchSeen: hasVisitedQuadrant(data, 0x8C, 4),
+	torch: isChestOpen(data, 0x8C, 6),
+	tileRoom: isChestOpen(data, 0x8D, 0),
+	compassUL: isChestOpen(data, 0x9D, 0),
+	compassUR: isChestOpen(data, 0x9D, 1),
+	compassBL: isChestOpen(data, 0x9D, 2),
+	compassBR: isChestOpen(data, 0x9D, 3),
+});
+
+export const countGTBasementState = (state) =>
+	GT_BASEMENT_CHECKS.reduce((acc, cur) => state[cur] ? acc + 1 : acc, 0);
+
+export const compareGTBasementState = (prev, cur) => {
+	for (let i = 0; i < GT_BASEMENT_ALL.length; ++i) {
+		if (prev[GT_BASEMENT_ALL[i]] !== cur[GT_BASEMENT_ALL[i]]) {
+			return GT_BASEMENT_ALL[i];
+		}
+	}
+	return '';
+};