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index 44c3a5d..2872ae4 100644
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index b12c530..4ed3253 100644
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+            "homepage": "http://www.github.com/sebastianbergmann/global-state",
+            "keywords": [
+                "global state"
+            ],
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/global-state/issues",
+                "source": "https://github.com/sebastianbergmann/global-state/tree/5.0.5"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2022-02-14T08:28:10+00:00"
+        },
+        {
+            "name": "sebastian/lines-of-code",
+            "version": "1.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/lines-of-code.git",
+                "reference": "c1c2e997aa3146983ed888ad08b15470a2e22ecc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/lines-of-code/zipball/c1c2e997aa3146983ed888ad08b15470a2e22ecc",
+                "reference": "c1c2e997aa3146983ed888ad08b15470a2e22ecc",
+                "shasum": ""
+            },
+            "require": {
+                "nikic/php-parser": "^4.6",
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library for counting the lines of code in PHP source code",
+            "homepage": "https://github.com/sebastianbergmann/lines-of-code",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/lines-of-code/issues",
+                "source": "https://github.com/sebastianbergmann/lines-of-code/tree/1.0.3"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-28T06:42:11+00:00"
+        },
+        {
+            "name": "sebastian/object-enumerator",
+            "version": "4.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-enumerator.git",
+                "reference": "5c9eeac41b290a3712d88851518825ad78f45c71"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/5c9eeac41b290a3712d88851518825ad78f45c71",
+                "reference": "5c9eeac41b290a3712d88851518825ad78f45c71",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.3",
+                "sebastian/object-reflector": "^2.0",
+                "sebastian/recursion-context": "^4.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Traverses array structures and object graphs to enumerate all referenced objects",
+            "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-enumerator/issues",
+                "source": "https://github.com/sebastianbergmann/object-enumerator/tree/4.0.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-10-26T13:12:34+00:00"
+        },
+        {
+            "name": "sebastian/object-reflector",
+            "version": "2.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "b4f479ebdbf63ac605d183ece17d8d7fe49c15c7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/b4f479ebdbf63ac605d183ece17d8d7fe49c15c7",
+                "reference": "b4f479ebdbf63ac605d183ece17d8d7fe49c15c7",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/object-reflector/issues",
+                "source": "https://github.com/sebastianbergmann/object-reflector/tree/2.0.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-10-26T13:14:26+00:00"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "4.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "e75bd0f07204fec2a0af9b0f3cfe97d05f92efc1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/e75bd0f07204fec2a0af9b0f3cfe97d05f92efc1",
+                "reference": "e75bd0f07204fec2a0af9b0f3cfe97d05f92efc1",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "https://github.com/sebastianbergmann/recursion-context",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/recursion-context/issues",
+                "source": "https://github.com/sebastianbergmann/recursion-context/tree/4.0.5"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-02-03T06:07:39+00:00"
+        },
+        {
+            "name": "sebastian/resource-operations",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8",
+                "reference": "0f4443cb3a1d92ce809899753bc0d5d5a8dd19a8",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/resource-operations/issues",
+                "source": "https://github.com/sebastianbergmann/resource-operations/tree/3.0.3"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-09-28T06:45:17+00:00"
+        },
+        {
+            "name": "sebastian/type",
+            "version": "3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "75e2c2a32f5e0b3aef905b9ed0b179b953b3d7c7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/75e2c2a32f5e0b3aef905b9ed0b179b953b3d7c7",
+                "reference": "75e2c2a32f5e0b3aef905b9ed0b179b953b3d7c7",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.2-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Collection of value objects that represent the types of the PHP type system",
+            "homepage": "https://github.com/sebastianbergmann/type",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/type/issues",
+                "source": "https://github.com/sebastianbergmann/type/tree/3.2.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-02-03T06:13:03+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "c6c1022351a901512170118436c764e473f6de8c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/c6c1022351a901512170118436c764e473f6de8c",
+                "reference": "c6c1022351a901512170118436c764e473f6de8c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.3"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/version/issues",
+                "source": "https://github.com/sebastianbergmann/version/tree/3.0.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-09-28T06:39:44+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/34a41e998c2183e22995f158c581e7b5e755ab9e",
+                "reference": "34a41e998c2183e22995f158c581e7b5e755ab9e",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/1.2.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-07-28T10:34:58+00:00"
+        }
+    ],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": {
@@ -327,5 +2058,5 @@
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
-    "plugin-api-version": "2.2.0"
+    "plugin-api-version": "2.3.0"
 }
diff --git a/phpunit.php b/phpunit.php
new file mode 100644
index 0000000..48d8528
--- /dev/null
+++ b/phpunit.php
@@ -0,0 +1,14 @@
+<?php 
+if (!defined('DS')) { define('DS', DIRECTORY_SEPARATOR); }
+/**
+ *---------------------------------------------------------------
+ * Autoloader / Compser
+ *---------------------------------------------------------------
+ *
+ * We need to access our dependencies & autloader..
+ */
+require __DIR__ . 
+	DS . 
+	'vendor' . 
+	DS . 
+	'autoload.php';
\ No newline at end of file
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..c276bbb
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" colors="true" bootstrap="phpunit.php" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">./src</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="PHP-Towerdefense Tests">
+      <directory suffix=".php">./tests/</directory>
+    </testsuite>
+  </testsuites>
+</phpunit>
diff --git a/src/UI/Point.php b/src/UI/Point.php
new file mode 100644
index 0000000..cd9eac2
--- /dev/null
+++ b/src/UI/Point.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace TowerDefense\UI;
+
+use GL\Math\Vec2;
+
+class Point
+{
+    public static function toString(Vec2 $point): string
+    {
+        return sprintf('%f,%f', $point->x, $point->y);
+    }
+
+    public static function fromString(string $string): Vec2
+    {
+        [$x, $y] = explode(',', $string);
+
+        return new Vec2((float) $x, (float) $y);
+    }
+
+    public static function isEqualTo(Vec2 $point1, Vec2 $point2): bool
+    {
+        return $point1->x == $point2->x && $point1->y == $point2->y;
+    }
+
+    public static function insideRect(Vec2 $point, Rect $rect): bool
+    {
+        return $point->x >= $rect->position->x &&
+            $point->y >= $rect->position->y &&
+            $point->x <= ($rect->position->x + $rect->size->x) &&
+            $point->y <= ($rect->position->y + $rect->size->y);
+    }
+}
diff --git a/src/UI/Rect.php b/src/UI/Rect.php
new file mode 100644
index 0000000..617335d
--- /dev/null
+++ b/src/UI/Rect.php
@@ -0,0 +1,181 @@
+<?php
+
+namespace TowerDefense\UI;
+
+use GL\Math\Vec2;
+
+/**
+ * Class Rect
+ * 
+ * @package TowerDefense\UI
+ */
+class Rect
+{
+    public function __construct(
+        public Vec2 $position,
+        public Vec2 $size
+    ) {
+    }
+
+    public static function fromXYWidthHeight(float $x, float $y, float $width, float $height): self
+    {
+        return new self(
+            new Vec2($x, $y),
+            new Vec2($width, $height)
+        );
+    }
+
+    public function toString(): string
+    {
+        return sprintf('%s,%s', Point::toString($this->position), Point::toString($this->size));
+    }
+
+    public static function fromString(string $string): self
+    {
+        [$x, $y, $width, $height] = explode(',', $string);
+
+        return self::fromXYWidthHeight(
+            (float) $x,
+            (float) $y,
+            (float) $width,
+            (float) $height
+        );
+    }
+
+    public function copy(): self
+    {
+        return new self(
+            $this->position->copy(),
+            $this->size->copy()
+        );
+    }
+
+    public function isEqualTo(Rect $rect): bool
+    {
+        return Point::isEqualTo($this->position, $rect->position) &&
+            Point::isEqualTo($this->size, $rect->size);
+    }
+
+    public function getMaxX(): float
+    {
+        return $this->position->x + $this->size->x;
+    }
+
+    public function getMaxY(): float
+    {
+        return $this->position->y + $this->size->y;
+    }
+
+    public function getMidX(): float
+    {
+        return $this->position->x + $this->size->x / 2;
+    }
+
+    public function getMidY(): float
+    {
+        return $this->position->y + $this->size->y / 2;
+    }
+
+    public function getMinX(): float
+    {
+        return $this->position->x;
+    }
+
+    public function getMinY(): float
+    {
+        return $this->position->y;
+    }
+
+    public function getCenter(): Vec2
+    {
+        return new Vec2($this->getMidX(), $this->getMidY());
+    }
+
+    public function containsPoint(Vec2 $point): bool
+    {
+        return Point::insideRect($point, $this);
+    }
+
+    public function insetRect(float $dx, float $dy): self
+    {
+        return new self(
+            new Vec2($this->position->x + $dx, $this->position->y + $dy),
+            new Vec2($this->size->x - ($dx * 2), $this->size->y - ($dy * 2))
+        );
+    }
+
+    public function offsetRect(float $dx, float $dy): self
+    {
+        return new self(
+            new Vec2($this->position->x + $dx, $this->position->y + $dy),
+            $this->size->copy()
+        );
+    }
+
+    public function integralRect(): self
+    {
+        return new self(
+            new Vec2(floor($this->position->x), floor($this->position->y)),
+            new Vec2(ceil($this->size->x), ceil($this->size->y))
+        );
+    }
+
+    public function isNullRect(): bool
+    {
+        return $this->size->x == 0 && $this->size->y == 0;
+    }
+
+    public function isEmptyRect(): bool
+    {
+        return $this->size->x <= 0 || $this->size->y <= 0;
+    }
+
+    public function intersectionWithRect(Rect $rect): self
+    {
+        $intersection = self::fromXYWidthHeight(max($this->getMinX(), $rect->getMinX()), max($this->getMinY(), $rect->getMinY()), 0, 0);
+
+        $intersection->size->x = min($this->getMaxX(), $rect->getMaxX()) - $intersection->getMinX();
+        $intersection->size->y = min($this->getMaxY(), $rect->getMaxY()) - $intersection->getMinY();
+
+        return $intersection->isEmptyRect() ? self::fromXYWidthHeight(0.0, 0.0, 0.0, 0.0) : $intersection;
+    }
+
+    public function intersectsRect(Rect $rect): bool
+    {
+        return $this->intersectionWithRect($rect)->isEmptyRect() == false;
+    }
+
+    public function unionWithRect(Rect $rect): self
+    {
+        $union = self::fromXYWidthHeight(min($this->getMinX(), $rect->getMinX()), min($this->getMinY(), $rect->getMinY()), 0, 0);
+
+        $union->size->x = max($this->getMaxX(), $rect->getMaxX()) - $union->getMinX();
+        $union->size->y = max($this->getMaxY(), $rect->getMaxY()) - $union->getMinY();
+
+        return $union;
+    }
+
+    public function standardizedRect(): self
+    {
+        $width = $this->size->x;
+        $height = $this->size->y;
+        $standardized = $this->copy();
+
+        if ($width < 0.0) {
+            $standardized->position->x = $standardized->position->x + $width;
+            $standardized->size->x = -$width;
+        }
+
+        if ($height < 0.0) {
+            $standardized->position->y = $standardized->position->y + $height;
+            $standardized->size->y = -$height;
+        }
+
+        return $standardized;
+    }
+
+    public function isInsideRect(Rect $rect): bool
+    {
+        return $this->unionWithRect($rect)->isEqualTo($rect);
+    }
+}
diff --git a/tests/UI/PointTest.php b/tests/UI/PointTest.php
new file mode 100644
index 0000000..3d40e26
--- /dev/null
+++ b/tests/UI/PointTest.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Tests\UI;
+
+use GL\Math\Vec2;
+use TowerDefense\UI\Point;
+use TowerDefense\UI\Rect;
+
+class PointTest extends \PHPUnit\Framework\TestCase
+{
+    public function testStringCreation(): void
+    {
+        $pointA = new Vec2(1, 2);
+        $string = Point::toString($pointA);
+        $pointB = Point::fromString($string);
+        $this->assertTrue(Point::isEqualTo($pointA, $pointB));
+    }
+
+    public function testInsideRect(): void
+    {
+        $pointA = new Vec2(1, 2);
+        $pointB = new Vec2(10, 10);
+        $pointC = new Vec2(4, 4);
+        $pointD = new Vec2(-1, -1);
+        $rect = new Rect(new Vec2(0, 0), new Vec2(4, 4));
+        $this->assertTrue(Point::insideRect($pointA, $rect));
+        $this->assertFalse(Point::insideRect($pointB, $rect));
+        $this->assertTrue(Point::insideRect($pointC, $rect));
+        $this->assertFalse(Point::insideRect($pointD, $rect));
+    }
+}
diff --git a/tests/UI/RectTest.php b/tests/UI/RectTest.php
new file mode 100644
index 0000000..d35dfc2
--- /dev/null
+++ b/tests/UI/RectTest.php
@@ -0,0 +1,176 @@
+<?php
+
+namespace Tests\UI;
+
+use GL\Math\Vec2;
+use TowerDefense\UI\Rect;
+
+class RectTest extends \PHPUnit\Framework\TestCase
+{
+    public function testStringCreation(): void
+    {
+        $rect = new Rect(new Vec2(1, 2), new Vec2(3, 4));
+        $rect = Rect::fromString($rect->toString());
+
+        $this->assertEquals(1, $rect->position->x);
+        $this->assertEquals(2, $rect->position->y);
+        $this->assertEquals(3, $rect->size->x);
+        $this->assertEquals(4, $rect->size->y);
+    }
+
+    public function testEqualTo(): void
+    {
+        $rectA = new Rect(new Vec2(1, 2), new Vec2(3, 4));
+        $rectB = new Rect(new Vec2(1, 2), new Vec2(3, 4));
+        $rectC = new Rect(new Vec2(1, 2), new Vec2(3, 5));
+
+        $this->assertTrue($rectA->isEqualTo($rectB));
+        $this->assertFalse($rectA->isEqualTo($rectC));
+    }
+
+    public function testGetCenter(): void
+    {
+        $rect = new Rect(new Vec2(1, 2), new Vec2(3, 4));
+        $center = $rect->getCenter();
+
+        $this->assertEquals(2.5, $center->x);
+        $this->assertEquals(4, $center->y);
+    }
+
+    public function testContaintsPoint(): void
+    {
+        $rect = new Rect(new Vec2(1, 2), new Vec2(3, 4));
+        $pointA = new Vec2(1, 2);
+        $pointB = new Vec2(2, 3);
+        $pointC = new Vec2(4, 6);
+        $pointD = new Vec2(0, 0);
+        $pointE = new Vec2(4, 7);
+
+        $this->assertTrue($rect->containsPoint($pointA));
+        $this->assertTrue($rect->containsPoint($pointB));
+        $this->assertTrue($rect->containsPoint($pointC));
+        $this->assertFalse($rect->containsPoint($pointD));
+    }
+
+    public function testInsetRect(): void
+    {
+        $rect = new Rect(new Vec2(1, 2), new Vec2(3, 4));
+        $insetRect = $rect->insetRect(1, 1);
+
+        $this->assertEquals(2, $insetRect->position->x);
+        $this->assertEquals(3, $insetRect->position->y);
+        $this->assertEquals(1, $insetRect->size->x);
+        $this->assertEquals(2, $insetRect->size->y);
+    }
+
+    public function testOffsetRect(): void
+    {
+        $rect = new Rect(new Vec2(1, 2), new Vec2(3, 4));
+        $offsetRect = $rect->offsetRect(1, 1);
+
+        $this->assertEquals(2, $offsetRect->position->x);
+        $this->assertEquals(3, $offsetRect->position->y);
+        $this->assertEquals(3, $offsetRect->size->x);
+        $this->assertEquals(4, $offsetRect->size->y);
+    }
+
+    public function testIntegralRect(): void
+    {
+        $rect = new Rect(new Vec2(1.1, 2.2), new Vec2(3.3, 4.4));
+        $integralRect = $rect->integralRect();
+
+        $this->assertEquals(1, $integralRect->position->x);
+        $this->assertEquals(2, $integralRect->position->y);
+        $this->assertEquals(4, $integralRect->size->x);
+        $this->assertEquals(5, $integralRect->size->y);
+    }
+
+    public function testIsNullAndEmptyRect(): void
+    {
+        $rect = new Rect(new Vec2(0, 0), new Vec2(0, 0));
+
+        $this->assertTrue($rect->isNullRect());
+        $this->assertTrue($rect->isEmptyRect());
+    }
+
+    public function testIntersectionWithRect(): void
+    {
+        $rectA = new Rect(new Vec2(0, 0), new Vec2(10, 10));
+        $rectB = new Rect(new Vec2(5, 5), new Vec2(15, 15));
+        $rectC = new Rect(new Vec2(50, 50), new Vec2(10, 10));
+
+        $intersection = $rectA->intersectionWithRect($rectB);
+        $this->assertEquals(5, $intersection->position->x);
+        $this->assertEquals(5, $intersection->position->y);
+        $this->assertEquals(5, $intersection->size->x);
+        $this->assertEquals(5, $intersection->size->y);
+
+        $intersection = $rectA->intersectionWithRect($rectC);
+        $this->assertTrue($intersection->isNullRect());
+    }
+
+    public function testIntersectsRect(): void
+    {
+        $rectA = new Rect(new Vec2(0, 0), new Vec2(10, 10));
+        $rectB = new Rect(new Vec2(5, 5), new Vec2(15, 15));
+        $rectC = new Rect(new Vec2(50, 50), new Vec2(10, 10));
+
+        $this->assertTrue($rectA->intersectsRect($rectB));
+        $this->assertFalse($rectA->intersectsRect($rectC));
+    }
+
+    public function testUnionWithRect(): void
+    {
+        $rectA = new Rect(new Vec2(0, 0), new Vec2(10, 10));
+        $rectB = new Rect(new Vec2(5, 5), new Vec2(15, 15));
+        $rectC = new Rect(new Vec2(50, 50), new Vec2(10, 10));
+        $rectD = new Rect(new Vec2(100, 100), new Vec2(10, 10));
+
+        $union = $rectA->unionWithRect($rectB);
+        $this->assertEquals(0, $union->position->x);
+        $this->assertEquals(0, $union->position->y);
+        $this->assertEquals(20, $union->size->x);
+        $this->assertEquals(20, $union->size->y);
+
+        $union = $rectA->unionWithRect($rectC);
+        $this->assertEquals(0, $union->position->x);
+        $this->assertEquals(0, $union->position->y);
+        $this->assertEquals(60, $union->size->x);
+        $this->assertEquals(60, $union->size->y);
+
+        $union = $rectB->unionWithRect($rectD);
+        $this->assertEquals(5, $union->position->x);
+        $this->assertEquals(5, $union->position->y);
+        $this->assertEquals(105, $union->size->x);
+        $this->assertEquals(105, $union->size->y);
+
+        $union = $rectA->unionWithRect($rectD);
+        $this->assertEquals(0, $union->position->x);
+        $this->assertEquals(0, $union->position->y);
+        $this->assertEquals(110, $union->size->x);
+        $this->assertEquals(110, $union->size->y);
+    }
+
+    public function testStandardizedRect(): void
+    {
+        $rectA = new Rect(new Vec2(0, 0), new Vec2(-10, -10));
+        $standardized = $rectA->standardizedRect();
+        $this->assertEquals(-10, $standardized->position->x);
+        $this->assertEquals(-10, $standardized->position->y);
+        $this->assertEquals(10, $standardized->size->x);
+        $this->assertEquals(10, $standardized->size->y);
+    }
+
+    public function testIsInsideRect(): void
+    {
+        $rectA = new Rect(new Vec2(0, 0), new Vec2(10, 10));
+        $rectB = new Rect(new Vec2(5, 5), new Vec2(15, 15));
+        $rectC = new Rect(new Vec2(50, 50), new Vec2(10, 10));
+        $rectD = new Rect(new Vec2(0, 0), new Vec2(20, 20));
+
+        $this->assertFalse($rectA->isInsideRect($rectB));
+        $this->assertFalse($rectA->isInsideRect($rectC));
+        $this->assertTrue($rectA->isInsideRect($rectD));
+        $this->assertTrue($rectB->isInsideRect($rectD));
+    }
+}
