moonfall/Assets/Scripts/.svn/text-base/BirdSpawn.lua.svn-base

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2014-10-21 04:54:42 +00:00
DIRECTION_NORTH = 1
DIRECTION_EAST = 2
DIRECTION_SOUTH = 3
DIRECTION_WEST = 4
FLOCK_SPREAD = 10
H_SPAWN = 320
V_SPAWN = 240
function OnActorCreate(id, parameters)
spawnerId = id
duration = parameters.spawningDuration
minSpawnTime = parameters.minSpawnTime
maxSpawnTime = parameters.maxSpawnTime
minFlockCount = parameters.minFlockCount
maxFlockCount = parameters.maxFlockCount
minSpeed = parameters.minSpeed
maxSpeed = parameters.maxSpeed
ActorSetShape(
spawnerId,
ACTOR_SHAPE_TYPE_COLLISION_SOLID,
{ size = {x = 32, y = 48 }, position = { x = 0, y = 0 }, data = 0, enabled = true}
)
directions =
{
[DIRECTION_NORTH] = "north",
[DIRECTION_EAST] = "east",
[DIRECTION_SOUTH] = "south",
[DIRECTION_WEST] = "west"
}
birdTimer = 0
end
function OnActorUpdate(elapsed)
if birdTimer <= 0 then
local camPos = CameraGetTarget()
local directionValue = math.random(1,4)
if directionValue == DIRECTION_SOUTH then
start = {x=math.random(camPos.x - H_SPAWN, camPos.x + H_SPAWN),y=camPos.y - V_SPAWN}
nxtBird = {{x=-FLOCK_SPREAD,y=-FLOCK_SPREAD}, {x=FLOCK_SPREAD,y=-FLOCK_SPREAD}}
elseif directionValue == DIRECTION_NORTH then
start = {x=math.random(camPos.x - H_SPAWN, camPos.x + H_SPAWN),y=camPos.y + V_SPAWN}
nxtBird = {{x=-FLOCK_SPREAD,y=FLOCK_SPREAD}, {x=FLOCK_SPREAD,y=FLOCK_SPREAD}}
elseif directionValue == DIRECTION_WEST then
start = {x=camPos.x + H_SPAWN, y=math.random(camPos.y - V_SPAWN, camPos.y + V_SPAWN)}
nxtBird = {{x=FLOCK_SPREAD,y=FLOCK_SPREAD}, {x=FLOCK_SPREAD,y=-FLOCK_SPREAD}}
elseif directionValue == DIRECTION_EAST then
start = {x=camPos.x - H_SPAWN, y=math.random(camPos.y - V_SPAWN, camPos.y + V_SPAWN)}
nxtBird = {{x=-FLOCK_SPREAD,y=FLOCK_SPREAD}, {x=-FLOCK_SPREAD,y=-FLOCK_SPREAD}}
end
local bird = 0
local distanceRatio = 0
local flockCount = math.random(minFlockCount, maxFlockCount)
local speed = math.random(minSpeed, maxSpeed)
while bird < flockCount do
if (math.mod(bird,2) == 0) then
distanceRatio = bird
end
ActorAdd("Bird.01",
{x=start.x + (nxtBird[math.mod(bird,2) + 1].x * distanceRatio),
y=start.y + (nxtBird[math.mod(bird,2) + 1].y * distanceRatio)},
nil,
{direction=directions[directionValue], speed=speed})
bird = bird + 1
end
birdTimer = math.random(minSpawnTime, maxSpawnTime)
end
birdTimer = birdTimer - elapsed
end