The Rectangle Coverage Checker is a web application that allows users to set a target rectangle and multiple region rectangles on a canvas. The application then determines if the target rectangle is completely covered by the region rectangles. This application was developed using Python's built-in functions and packaged as a web app using the Flask framework. It is deployed to Heroku for easy access and use.

• Backend: The backend of the application is built using Flask, a lightweight web framework for Python. The coverage algorithm is implemented using Python's built-in functions.
• Frontend: The frontend is developed using HTML, CSS, and JavaScript. Bootstrap is used for styling and layout.
• Deployment: The application is deployed on Heroku, a cloud platform that simplifies the deployment process.

• Set Target: Click the "Set Target" button and draw a rectangle on the canvas. This rectangle represents the target area that needs to be covered.
• Add Regions: Click the "Set Region" button and draw multiple rectangles on the canvas. These rectangles represent the regions that will potentially cover the target area.
• Check Coverage: Click the "Check Coverage" button to determine if the target rectangle is completely covered by the region rectangles.
• Clear Canvas: Click the "Clear" button to reset the canvas and start over.

The coverage algorithm works by checking if all corners of the target rectangle are covered by at least one region rectangle. Here's how it works:

1. Extract Corners of the Target Rectangle:

   • The target rectangle's corners are extracted as four points: (top-left, top-right, bottom-left, bottom-right).

2. Check Each Corner:

   • For each corner of the target rectangle, the algorithm checks if it lies within any of the region rectangles.

3. Determine Coverage:

   • If all corners of the target rectangle are covered by at least one region rectangle, the target is considered covered. Otherwise, it is not covered.