Hangover Games Asset Generator

A command-line tool for generating game graphics using OpenAI's image generation APIs.

Installation

Option 1: Clone from Repository

# Clone the repository
git clone https://github.com/hangovergames/assetgen.git
cd assetgen

# Initialize and update the assets submodule
git submodule init
git submodule update

Option 2: Install via pip

pip install hangovergames-assetgen

Usage

Create a spec file (e.g., Assetgenfile) with your image generation instructions:

PROMPT Create a clean top‑down 2‑D sprite on a transparent background.
MODEL gpt-image-1
SIZE 1024x1024
BACKGROUND transparent
ASSET road_straight_ns.png A seamless 256×256 asphalt road …
ASSET road_corner_ne.png  A 256×256 90‑degree bend …

Then run:

assetgen Assetgenfile

Command Line Options

• -c, --count: Maximum number of images to generate this run (default: 1)
• -o, --output-dir: Output directory (relative to spec file location)
• --continue-on-error: Continue processing on API errors
• -v, --verbose: Show detailed API response information

API Configuration

You can configure the API using environment variables:

• OPENAI_API_KEY: Your OpenAI API key (required)
• OPENAI_ORGANIZATION: Your OpenAI organization ID
• OPENAI_PROJECT: Your OpenAI project ID
• OPENAI_API_BASE: API base URL (default: https://api.openai.com)
• OPENAI_API_PATH: API path (default: /v1/images/generations)

Spec File Format

Each line (ignoring leading whitespace) must begin with one of these tokens (case-insensitive):

PROMPT <text …>
ASSET  <filename> <asset‑specific prompt>
MODEL  <dall-e-2|dall-e-3|gpt-image-1>
BACKGROUND <transparent|opaque|auto>
MODERATION <low|auto>
OUTPUT_COMPRESSION <0‑100>
OUTPUT_FORMAT <png|jpeg|webp>
QUALITY <auto|high|medium|low|hd|standard>
SIZE <WxH|auto>
STYLE <vivid|natural>
USER <identifier>

License

MIT License - see LICENSE file for details