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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 starttp;
var minx = 100;
var miny = 100;
var endtp;
var maxx = 0
var maxy = 0;
for (i = 0; i < teleportersAndTraps.length; i++) {
var t1 = teleportersAndTraps[i];
if(t1.getType() != 'teleporter') continue;
var tpcoords = map.getCanvasCoords(t1);
if(tpcoords.y > maxy) {
endtp = t1;
maxy = tpcoords.y;
} else if(tpcoords.y == maxy) {
if(tpcoords.x > maxx) {
endtp = t1;
maxx = tpcoords.x;
}
}
if(tpcoords.y < miny) {
starttp = t1;
miny = tpcoords.y;
} else if(tpcoords.y == miny) {
if(tpcoords.x < minx) {
starttp = t1;
minx = tpcoords.x
}
}
}
starttp.setTarget(endtp);
break;
}
}
function validateLevel(map) {
map.validateExactlyXManyObjects(1, 'exit');
}
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