Code:
new mine = -1, Float:vecSrc[3], class[32];
vecSrc represents origin where next mine should be planted
const SEARCH_RADIUS = 15.0
while((mine=engfunc(EngFunc_FindEntityInSphere, mine, vecSrc, SEARCH_RADIUS))>0)
{
entity_get_string(mine, EV_SZ_classname, class, charsmax(class));
if( equal( class, "YOUR_MINE_CLASSNAME" ) )
{
/* mine has been already planted nearby */
break;
}
}
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