function c_selectunit(unitobject) {
	if unitobject.waiting return false
	unitobject.state = st_moving;
	unitobject.drawstate = st_movingdraw;
	unitobject.returnpos = new vec2(unitobject.pos.x, unitobject.pos.y);
	var mov = unitobject.data.mov.val;
	var i, j;
	for (i=-mov; i<=mov; i++) {
		for (j=-mov; j<=mov; j++) {
			if abs(i)+abs(j) <= mov {
				c_colortile(unitobject.pos.x+i, unitobject.pos.y+j, c_cyan);
			}
		}
	}
	ARTICULATOR.selectedunit = unitobject;
	c_fulleval(unitobject);
	return unitobject;
}

function c_deselectunit(unitobject) {
	if ARTICULATOR.selectedunit != unitobject return false;
	if unitobject == noone return false;
	unitobject.sprite_index = unitobject.data.idle;
	state = st_standing;
	drawstate = c_null;
	c_decolor_all(c_cyan);
	c_decolor_all(c_red);
	c_decolor_all(c_green);
	ARTICULATOR.selectedunit = noone;
	c_fulleval(unitobject);
	return true;
}

function c_colortile(x, y, color) {
	if !c_tileexists(x, y) return false;
	if !array_contains(global.map[x][y], color) {
		array_push(global.map[x][y].overlays, color);
	}
	return true;
}

function c_markunit(unitobject) {
	unitobject.marked = !unitobject.marked;
	c_loadmarkings();
}

function c_loadmarkings() {
	c_decolor_all(c_maroon);
	var k;
	for (k=0; k<array_length(global.units[ARMY.THEM]); k++) {
		var unitobject = global.units[ARMY.THEM][k];
		var i, j;
		var mov = unitobject.data.mov.val+unitobject.data.rng.val;
		for (i=-mov; i<=mov; i++) {
			for (j=-mov; j<=mov; j++) {
				if abs(i)+abs(j) <= mov {
					if unitobject.marked c_colortile(unitobject.pos.x+i, unitobject.pos.y+j, c_maroon);
				}
			}
		}
	}
}