Added example script for generating mazes.

This commit is contained in:
sk89q 2011-01-22 15:38:38 -08:00
parent 213f1e19f1
commit e94e1e29ce

132
craftscripts/maze.js Normal file
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// $Id$
/*
* Maze generator CraftScript for WorldEdit
* Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
importPackage(Packages.com.sk89q.worldedit);
importPackage(Packages.com.sk89q.worldedit.blocks);
context.checkArgs(1, -1, "<block> [width] [height]");
var sess = context.remember();
// This may throw an exception that is caught by the script processor
var block = context.getBlock(argv[1]);
var w = argv.length > 2 ? parseInt(argv[2]) : 5;
var h = argv.length > 3 ? parseInt(argv[3]) : 5;
function id(x, y) {
return y * (w + 1) + x;
}
function $x(i) {
return i % (w + 1);
}
function $y(i) {
return Math.floor(i / (w + 1));
}
function shuffle(arr) {
var i = arr.length;
if (i == 0) return false;
while (--i) {
var j = Math.floor(Math.random() * (i + 1));
var tempi = arr[i];
var tempj = arr[j];
arr[i] = tempj;
arr[j] = tempi;
}
}
var stack = [];
var visited = {};
var noWallLeft = new Array(w * h);
var noWallAbove = new Array(w * h);
var current = 0;
stack.push(id(0, 0))
while (stack.length > 0) {
var cell = stack.pop();
var x = $x(cell), y = $y(cell);
visited[cell] = true;
var neighbors = []
if (x > 0) neighbors.push(id(x - 1, y));
if (x < w - 1) neighbors.push(id(x + 1, y));
if (y > 0) neighbors.push(id(x, y - 1));
if (y < h - 1) neighbors.push(id(x, y + 1));
shuffle(neighbors);
while (neighbors.length > 0) {
var neighbor = neighbors.pop();
var nx = $x(neighbor), ny = $y(neighbor);
if (visited[neighbor] != true) {
stack.push(cell);
if (y == ny) {
if (nx < x) {
noWallLeft[cell] = true;
} else {
noWallLeft[neighbor] = true;
}
} else {
if (ny < y) {
noWallAbove[cell] = true;
} else {
noWallAbove[neighbor] = true;
}
}
stack.push(neighbor);
break;
}
}
}
/*for (var y = -1; y < h; y++) {
var line = "";
for (var x = 0; x <= w; x++) {
var cell = id(x, y)
var l = y >= 0 ? (noWallLeft[cell] ? "_" : "|") : "_";
var b = x < w ? (noWallAbove[id(x, y + 1)] ? " " : "_") : "";
line += l + b;
}
context.print(line);
}*/
var origin = player.getBlockIn();
for (var y = 0; y <= h; y++) {
for (var x = 0; x <= w; x++) {
var cell = id(x, y)
if (!noWallLeft[cell] && y < h) {
sess.setBlock(origin.add(x * 2 - 1, 0, y * 2), block);
sess.setBlock(origin.add(x * 2 - 1, 1, y * 2), block);
}
if (!noWallAbove[cell] && x < w) {
sess.setBlock(origin.add(x * 2, 0, y * 2 - 1), block);
sess.setBlock(origin.add(x * 2, 1, y * 2 - 1), block);
}
sess.setBlock(origin.add(x * 2 - 1, 0, y * 2 - 1), block);
sess.setBlock(origin.add(x * 2 - 1, 1, y * 2 - 1), block);
}
}