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Solution to level 17 in Untrusted: http://alex.nisnevich.com/untrusted/
/***************
* pointers.js *
***************
*
* You! How are you still alive?
*
* Well, no matter. Good luck getting through this
* maze of rooms - you'll never see me or the Algorithm again!
*/
function startLevel(map) {
function shuffle(o){ //v1.0 [http://bit.ly/1l6LGQT]
for(var j, x, i = o.length; i; j = Math.floor(Math.random() * i),
x = o[--i], o[i] = o[j], o[j] = x);
return o;
};
map.createFromGrid(
['+++++++++++++++++++++++++++++++++++++++++++++',
'++o *++++o *++++o *++++o *++++o *++++o *+++++',
'+* @ o++* o++* o++* o++* o++* o++++',
'++o *++++o *++++o *++++o *++++o *++++o *+++++',
'+++++++++++++++++++++++++++++++++++++++++++++',
'+++++* o++++* o++++* o++++* o++++* o++++* o++',
'++++o *++o *++o *++o *++o *++o *+',
'+++++* o++++* o++++* o++++* o++++* o++++* o++',
'+++++++++++++++++++++++++++++++++++++++++++++',
'++o *++++o *++++o *++++o *++++o *++++o *+++++',
'+* o++* o++* o++* o++* o++* o++++',
'++o *++++o *++++o *++++o *++++o *++++o *+++++',
'+++++++++++++++++++++++++++++++++++++++++++++',
'+++++* o++++* o++++* o++++* o++++* o++++* o++',
'++++o *++o *++o *++o *++o *++o *+',
'+++++* o++++* o++++* o++++* o++++* o++++* o++',
'+++++++++++++++++++++++++++++++++++++++++++++',
'++o *++++o *++++o *++++o *++++o *++++o *+++++',
'+* o++* o++* o++* o++* o++* E o++++',
'++o *++++o *++++o *++++o *++++o *++++o *+++++',
'+++++++++++++++++++++++++++++++++++++++++++++'],
{
'@': 'player',
'E': 'exit',
'+': 'block',
'o': 'teleporter',
'*': 'trap',
}, 2, 2);
var canvas = map.getCanvasContext();
var teleportersAndTraps = map.getDynamicObjects();
teleportersAndTraps = shuffle(teleportersAndTraps);
for (i = 0; i < teleportersAndTraps.length; i+=2) {
var t1 = teleportersAndTraps[i];
var t2 = teleportersAndTraps[i+1];
// Point each teleporter to either another teleporter
// or a trap
if (t1.getType() == 'teleporter') {
t1.setTarget(t2);
}
if (t2.getType() == 'teleporter') {
t2.setTarget(t1);
}
}
var minT = false;
var maxT = false;
for (i = 0; i < teleportersAndTraps.length; i++) {
t = teleportersAndTraps[i];
if (t.getType() == 'teleporter') {
if (!minT) {
minT = t;
}
if (!maxT) {
maxT = t;
}
if (map.getCanvasCoords(t).x <= map.getCanvasCoords(minT).x) {
if (map.getCanvasCoords(t).y <= map.getCanvasCoords(minT).y) {
minT = t;
}
}
if (map.getCanvasCoords(t).y >= map.getCanvasCoords(maxT).y) {
if (map.getCanvasCoords(t).x >= map.getCanvasCoords(maxT).y) {
maxT = t;
}
}
}
}
minT.setTarget(maxT);
{
}
}
function validateLevel(map) {
map.validateExactlyXManyObjects(1, 'exit');
}
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