From 02455892dac1d52914e5702fd8e895d5cee1f083 Mon Sep 17 00:00:00 2001
From: FBeans <phil@pgburton.com>
Date: Sat, 21 May 2022 19:07:32 +0100
Subject: Add world, boid and all collision detection

---
 src/World/Boid.php | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 src/World/Boid.php

(limited to 'src/World/Boid.php')

diff --git a/src/World/Boid.php b/src/World/Boid.php
new file mode 100644
index 0000000..3787516
--- /dev/null
+++ b/src/World/Boid.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace App\World;
+
+use App\Collision\Collision;
+use Exception;
+
+class Boid
+{
+    protected $radius;
+    private $initial_x;
+    private $initial_y;
+
+    protected $x;
+    protected $y;
+
+    public function __construct(int $radius, int $initial_x, int $initial_y, ?string $name = null)
+    {
+        $this->radius($radius);
+        $this->initial_x = $initial_x;
+        $this->initial_y = $initial_y;
+
+        $this->position($initial_x, $initial_y);
+
+        if (!$name) {
+            $name = $this->generateName();
+        }
+
+        $this->name($name);
+    }
+
+    public function radius(int $radius = null): int|Boid
+    {
+        if ($radius) {
+            $this->radius = $radius;
+            return $this;
+        }
+
+        return $this->radius;
+    }
+
+    public function position(int $x = null, int $y = null): array|Boid
+    {
+        if ($x !== null xor $y !== null) {
+            throw new Exception('Either 0 or 2 arguments are requried for Boid::position()');
+        }
+
+        if ($x !== null) {
+            $this->x = $x;
+            $this->y = $y;
+            return $this;
+        }
+
+        return [$this->x, $this->y];
+    }
+
+    public function name(string $name = null): string|Boid
+    {
+        if ($name) {
+            $this->name = $name;
+            return $this;
+        }
+
+        return $this->name;
+    }
+
+    public function isCollisionWithWorld(int $w_w, int $w_h, int $w_x, int $w_y): bool
+    {
+        return Collision::circleWorld($this->radius, $this->x, $this->y, $w_w, $w_h, $w_x, $w_y);
+    }
+
+    protected function generateName()
+    {
+        return uniqid('boid');
+    }
+}
-- 
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