Cod of Duty

Welcome to Cod of Duty, our submission to the hackerspace game jam. https://itch.io/jam/hackerspace-gamejam-2025h/entries

Cod of Duty a fish simulator game where you take control of a fish navigating a dynamic underwater ecosystem! This game features realistic boid-based fish behavior, predator-prey dynamics, and a mathematically driven shader for fish animations that brings the underwater world to life.

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Features

🐟 Fish Behavior

• Boid System: Fish move in schools using alignment, cohesion, and separation rules.
• Weight Classes: Fish are categorized into weight classes, affecting their interactions:
  • Smaller fish fear larger fish.
  • Larger fish hunt smaller fish.
  • Fish of the same weight class align and school together.
• Player Interaction: The player fish is part of the ecosystem:
  • Boids react to the player as either prey or predator based on size.
  • The player can eat smaller fish to grow.

🎨 Mathematical Fish Animation Shader

• Custom Shader: Fish animations are driven mathematically using sine waves for realistic tail movement.
• Velocity Scaling: The shader dynamically adjusts animation speed based on the fish's movement velocity.
• Metallic and Smoothness Effects: The shader includes Fresnel highlights and metallic reflections for a polished underwater look.

🌊 Dynamic Ecosystem

• Boundary System: Fish are confined to a visible underwater box, ensuring they stay within the playable area.
• Growth Mechanics: Fish grow logarithmically as they eat, with a cap on maximum size.
• Predator-Prey Dynamics: Fish interact based on size, creating a natural food chain.

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Installation

1. Clone the repository:

   git clone https://github.com/tobiasfremming/Cod-of-duty.git

2. Open the project in Unity (tested with Unity version 2023.x or later).
3. Ensure all dependencies are installed (e.g., URP for shaders).

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How to Play

1. Control the Player Fish:

   • Move around the underwater world.
   • Eat smaller fish to grow.
   • Avoid larger fish to survive.

2. Interact with the Ecosystem:

   • Watch fish school together and react dynamically to predators and prey.
   • Explore the underwater boundary box.

3. Enjoy the Visuals:

   • Admire the mathematically driven fish animations and metallic shader effects.

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Screenshots

Here are some screenshots showcasing the game:

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Development Highlights

🐟 Boid System

The boid system is implemented in the BoidManager.cs and Boid.cs scripts. It uses:

• Neighbor Detection: Fish detect nearby boids using radii for alignment, cohesion, and separation.
• Predator and Prey Logic: Fish react to others based on weight class and size.

🎨 Fish Shader

The FishAffineShader.shader is a custom shader that animates fish tails mathematically:

• Sine Wave Animation: Tail movement is calculated using sine waves for smooth, realistic motion.
• Velocity Scaling: The shader dynamically adjusts animation speed based on the fish's velocity, controlled by the FishShaderController.cs.

Dive into the underwater world of Cod of Duty and experience the life of a fish in a dynamic ecosystem! 🐟