<?php

namespace App\System;

use App\Component\ExampleImage;

use GL\Math\{GLM, Quat, Vec2, Vec3};

use VISU\ECS\EntitiesInterface;

use VISU\ECS\SystemInterface;

use VISU\Geo\Transform;

use VISU\Graphics\Rendering\RenderContext;

class VisuPhpantSystem implements SystemInterface

{

/**

* Registers the system, this is where you should register all required components.

*

* @return void

*/

public function register(EntitiesInterface $entities) : void

{

$entities->registerComponent(ExampleImage::class);

// create a bunch of phpants

for ($i = 0; $i < 50; $i++) {

$entity = $entities->create();

$spite = $entities->attach($entity, new ExampleImage);

$spite->spriteFrame = (int) rand(0, 2);

$spite->spriteFrameTick = (int) rand(0, 100);

$spite->speed->x = (float) rand(2, 40) / 10;

$spite->speed->y = (float) (rand(-20, 20)) / 10;

$transform = $entities->attach($entity, new Transform);

$transform->position = new Vec3(rand(0, 4096), rand(0, 2048), 0);

$transform->scale = new Vec3(32, 32, 1);

}

}

/**

* Unregisters the system, this is where you can handle any cleanup.

*

* @return void

*/

public function unregister(EntitiesInterface $entities) : void

{

}

/**

* Updates handler, this is where the game state should be updated.

*

* @return void

*/

public function update(EntitiesInterface $entities) : void

{

// update the sprite frame

foreach ($entities->view(ExampleImage::class) as $entity => $exampleImage) {

$exampleImage->spriteFrameTick++;

if ($exampleImage->spriteFrameTick >= $exampleImage->spriteFrameRate) {

$exampleImage->spriteFrameTick = 0;

$exampleImage->spriteFrame++;

if ($exampleImage->spriteFrame >= 3) {

$exampleImage->spriteFrame = 0;

}

}

}

// update the transform

foreach ($entities->view(ExampleImage::class) as $entity => $exampleImage) {

$transform = $entities->get($entity, Transform::class);

$transform->position->x = $transform->position->x - $exampleImage->speed->x;

$transform->position->y = $transform->position->y + $exampleImage->speed->y;

if ($transform->position->x < -32) {

$transform->position->x = 4096;

}

if ($transform->position->y < -32) {

$transform->position->y = 2048;

}

if ($transform->position->x > 4096) {

$transform->position->x = -32;

}

if ($transform->position->y > 2048) {

$transform->position->y = -32;

}

}

}

/**

* Handles rendering of the scene, here you can attach additional render passes,

* modify the render pipeline or customize rendering related data.

*

* @param RenderContext $context

*/

public function render(EntitiesInterface $entities, RenderContext $context) : void

{

}

}