It says "Call to a member function spawnTo() on null". How can I solve this problem?

$x = $player->x;
$y = $player->y;
$z = $player->z;


$position = new Position($x, $y, $z, $player->getLevel());


$nbtcr = Entity::createBaseNBT($position);

$sc = Entity::createEntity(10, $level, $nbtcr, true);

$sc->spawnTo($player);

 

$sc is null, so probably Entity under type 10 isn't registered

 

why is $sc null?

$sc = Entity::createEntity(10, $level, $nbtcr, true);

here is $sc

 

createEntity returns null when the entity with the given network id is not registered yet.

 

Then, How can I register id???

 

See here how the other entities are registered: https://github.com/pmmp/PocketMine-...58eeae3/src/pocketmine/entity/Entity.php#L340

 

$x = $player->x;
$y = $player->y;
$z = $player->z;


$position = new Position($x, $y, $z, $player->getLevel());


Entity::registerEntity(Chicken::class, false, ['Chicken', 'minecraft:Chicken']);


$nbtcr = Entity::createBaseNBT($position);
$sc = Entity::createEntity(Chicken, $level, $nbtcr, true);

$sc->spawnTo($player);



I added Entity::registerEntity(Chicken::class, false, ['Chicken', 'minecraft:Chicken']); but it doesn't work and says ReflectionException: "Class ms\Chicken does not exist" (-1) in "src/pocketmine/entity/Entity" at line 391

 

Obviously, you will also have to write a chicken class (and import it with a "use" statement)

 

I made a new folder(src->chicken->CChicken.php) and I wrote
<?php

declare(strict_types=1);

namespace ms\chicken;

class CChicken extends ms {

const TYPE_ID = 10;
const HEIGHT = 0.7;

}

and I added "use chicken\CChicken;" in MS.php(src->ms->MS.php)

but nothing happened. no crash.

 

"extends ms" why?!

Take a look at the built-in entities: https://github.com/pmmp/PocketMine-...c20ef230dcadd33343b32c4/src/pocketmine/entity

 

I see it, but I don't know what to do now.. I'm plugin beginner, please help me more detail. then what should I edit?

 

Your class will need to inherit "Entity" (in this case "Animal" is probably the best choice).

You will need to have basic understanding of OOP if you want to make a complex PocketMine plugin.

 

I edit MS.php like this(down)

<?php

namespace ms;

use pocketmine\plugin\PluginBase;
use pocketmine\event\Listener;
use pocketmine\event\player\PlayerInteractEvent;

use pocketmine\item\ItemBlock;

use pocketmine\item\Item;

use pocketmine\level\Particle;

use pocketmine\level\Position;

use pocketmine\level\particle\FlameParticle;

use pocketmine\command\Command;
use pocketmine\command\CommandSender;

use pocketmine\nbt\tag\CompoundTag;
use pocketmine\nbt\tag\ListTag;
use pocketmine\nbt\tag\ByteTag;
use pocketmine\nbt\tag\DoubleTag;
use pocketmine\nbt\tag\FloatTag;

use pocketmine\entity\Entity;

use pocketmine\level\Level;

use pocketmine\Player;

use pocketmine\math\Vector3;

use ms\CChicken;




class MS extends PluginBase implements Listener{

const ENTITY_TYPES = "Chicken"

public function onEnable(){
foreach (Chicekn as $className){
Entity::registerEntity($className, true);
}
$this->getServer()->getPluginManager()->registerEvents($this,$this);
}

public function Throwing(PlayerInteractEvent $event){
$player = $event->getPlayer();
$level = $player->getLevel();

if($event->getItem()->getId() == 280){
$nbt = new CompoundTag("", [
"Pos" => new ListTag("Pos", [
new DoubleTag("", $player->x),
new DoubleTag("", $player->y + $player->getEyeHeight()),
new DoubleTag("", $player->z)
]),
"Motion" => new ListTag("Motion", [
new DoubleTag("", -sin($player->yaw / 180 * M_PI) * cos($player->pitch / 180 * M_PI)),
new DoubleTag("", -sin($player->pitch / 180 * M_PI)),
new DoubleTag("", cos($player->yaw / 180 * M_PI) * cos($player->pitch / 180 * M_PI))
]),
"Rotation" => new ListTag("Rotation", [
new FloatTag("", $player->yaw),
new FloatTag("", $player->pitch)
]),
]);


$x = $player->x;
$y = $player->y;
$z = $player->z;


$position = new Position($x, $y, $z, $player->getLevel());


$nbtcr = Entity::createBaseNBT($position);
$sc = Entity::createEntity(Chicken, $level, $nbtcr, true);

$sc->spawnTo($player);


and I edit CChicken.php like this(down)


<?php

declare(strict_types=1);

namespace ms\chicken;

class CChicken extends PluginBase {

const TYPE_ID = 10;
const HEIGHT = 0.7;

}





and There is no crash but still nothing happening, what's wrong??

 

Almost all of it

 

Is there example plugin? I Iittle understanded about OOP, but still don't know how to solve this..
I want to just make spawning one chicken to me when I touch with stick...


I edit MS.php

<?php

namespace ms;

use pocketmine\plugin\PluginBase;
use pocketmine\event\Listener;
use pocketmine\event\player\PlayerInteractEvent;

use pocketmine\item\ItemBlock;

use pocketmine\item\Item;

use pocketmine\level\Particle;

use pocketmine\level\Position;

use pocketmine\level\particle\FlameParticle;

use pocketmine\command\Command;
use pocketmine\command\CommandSender;

use pocketmine\nbt\tag\CompoundTag;
use pocketmine\nbt\tag\ListTag;
use pocketmine\nbt\tag\ByteTag;
use pocketmine\nbt\tag\DoubleTag;
use pocketmine\nbt\tag\FloatTag;

use pocketmine\entity\Entity;

use pocketmine\level\Level;

use pocketmine\Player;

use pocketmine\math\Vector3;

use chicken\CChicken;

class MS extends PluginBase implements Listener{

const ENTITY_TYPES = "Chicken";

public function onEnable(){
foreach (ENTITY_TYPES as $className){
Entity::registerEntity($className, true);
}
$this->getServer()->getPluginManager()->registerEvents($this,$this);
}

public function Throwing(PlayerInteractEvent $event){
$player = $event->getPlayer();
$level = $player->getLevel();

if($event->getItem()->getId() == 280){
$nbt = new CompoundTag("", [
"Pos" => new ListTag("Pos", [
new DoubleTag("", $player->x),
new DoubleTag("", $player->y + $player->getEyeHeight()),
new DoubleTag("", $player->z)
]),
"Motion" => new ListTag("Motion", [
new DoubleTag("", -sin($player->yaw / 180 * M_PI) * cos($player->pitch / 180 * M_PI)),
new DoubleTag("", -sin($player->pitch / 180 * M_PI)),
new DoubleTag("", cos($player->yaw / 180 * M_PI) * cos($player->pitch / 180 * M_PI))
]),
"Rotation" => new ListTag("Rotation", [
new FloatTag("", $player->yaw),
new FloatTag("", $player->pitch)
]),
]);


$x = $player->x;
$y = $player->y;
$z = $player->z;


$position = new Position($x, $y, $z, $player->getLevel());

$nbtcr = Entity::createBaseNBT($position);
$sc = Entity::createEntity(Chicken, $level, $nbtcr, true);

$sc->spawnTo($player);


and I edit CChicken.php

<?php
use pocketmine\entity\Animal;
//declare(strict_types=1);

namespace chicken;

class CChicken extends Animal {

const TYPE_ID = 10;
const HEIGHT = 0.7;

}


It says
"Use of undefined constant ENTITY_TYPES - assumed 'ENTITY_TYPES' (this will throw an Error in a future version of PHP)" (EXCEPTION) in "plugins/monster/src/ms/MS" at line 61