as 3com said you can make your tank a character and then it will follow waypoints with a script that includes the following code
EntObjNo = g_Entity[e]['obj']
if ai_soldier_state[e] == "patrol" then
if ai_soldier_pathindex[e] == -1 then
ai_soldier_pathindex[e] = -2
CharacterControlArmed(e)
PathIndex = -1
PathPointIndex = -1
pClosest = 99999
for pa = 1, AIGetTotalPaths(), 1 do
for po = 1 , AIGetPathCountPoints(pa), 1 do
pDX = g_Entity[e]['x'] - AIPathGetPointX(pa,po)
pDZ = g_Entity[e]['z'] - AIPathGetPointZ(pa,po)
pDist = math.sqrt(math.abs(pDX*pDX)+math.abs(pDZ*pDZ))
if pDist < pClosest and pDist < 200 then
pClosest = pDist
PathIndex = pa
PathPointIndex = po
end
end -- po
end -- pa
if PathIndex > -1 then
ai_soldier_pathindex[e] = PathIndex
ai_path_point_index[e] = PathPointIndex
ModulateSpeed(e,1.0)
SetCharacterToWalk(e)
ai_path_point_direction[e] = 1
ai_path_point_max[e] = AIGetPathCountPoints(ai_soldier_pathindex[e])
end
end
if ai_soldier_pathindex[e] > -1 then
ai_patrol_x[e] = AIPathGetPointX(ai_soldier_pathindex[e],ai_path_point_index[e])
ai_patrol_z[e] = AIPathGetPointZ(ai_soldier_pathindex[e],ai_path_point_index[e])
AIEntityGoToPosition(EntObjNo,ai_patrol_x[e],ai_patrol_z[e])
tDistX = g_Entity[e]['x'] - ai_patrol_x[e]
tDistZ = g_Entity[e]['z'] - ai_patrol_z[e]
DistFromPath = math.sqrt(math.abs(tDistX*tDistX)+math.abs(tDistZ*tDistZ))
if DistFromPath < 50 then
if ai_path_point_direction[e] == 1 then
ai_path_point_index[e] = ai_path_point_index[e] + 1
if ( ai_path_point_index[e] > ai_path_point_max[e] ) then
ai_path_point_index[e] = ai_path_point_max[e] - 1
ai_path_point_direction[e] = 0
end
else
ai_path_point_index[e] = ai_path_point_index[e] - 1
if ( ai_path_point_index[e] < 1 ) then
ai_path_point_index[e] = 2
ai_path_point_direction[e] = 1
end
end
end
end
end
life\'s one big game
windows vista ultimate
i5 @3.3ghz, 4gb ram, geforce gtx460, directx 11