Polygon

This repository includes the implementation of various classes related to polygons, including the Polygon, Point, Line, Triangle, and Rectangle classes. Each class has specific attributes and methods to perform different operations related to polygons.

Polygon Class

The Polygon class represents a polygon and has the following features:

• The attribute vertices is declared as a List of Points to store the vertices of the polygon.

• The default constructor initializes the vertices attribute with three points: (0,0), (1,1), and (1,0) in the respective order.

• The constructor with three Point parameters initializes the vertices attribute and adds the three parameters respectively to the vertices list.

• The method computePerimeter calculates and returns the sum of the lengths of each side of the polygon. It does this by creating a line per consecutive pair of vertices and computing its length using the computeLength method of the Line class. Note that the last vertex is paired with the first vertex to complete the polygon.

• The method computeArea calculates and returns the area of the polygon using a specific formula. It considers the number of vertices and the x-values of the first and last vertices.

• The method addVertex adds a new vertex to the vertices list.

• The method removeVertex searches for a vertex in the vertices list that has the same x and y values as the provided vertex. If found, it removes it and returns true. If the vertex is not found, it returns false.

• The method getNumberOfSides returns the number of sides of the current Polygon object.

Point Class

The Point class represents a point in a two-dimensional space and includes the following features:

• The class has attributes for x and y coordinates.

• It provides constructors, getters, and setters for the attributes.

• The method computeDistanceFromOrigin calculates and returns the distance between the point (given its x and y values) and the origin (0,0) using the distance formula.

Line Class

The Line class represents a line segment between two points and includes the following features:

• The class has two private attributes, p1 and p2, representing the starting and ending points of the line.

• The constructor initializes each parameter to its corresponding attribute.

• The method getMidpoint returns the midpoint of the line as a Point object, calculated using the midpoint formula.

• The method computeLength calculates and returns the distance between the p1 and p2 attributes using the distance formula.

• The method computeSlope calculates and returns the slope of the line using the slope function. If the denominator would result in 0, the slope is overridden with a value of 8 to avoid an undefined value. Note that the numerator is cast to type double before dividing it by the denominator to ensure the result is of type double.

Triangle Class

The Triangle class extends the Polygon class and includes additional features specific to triangles:

• It includes an enum called TriangleType that represents the type of triangle (equilateral, isosceles, or scalene).

• The default constructor calls the default constructor of the superclass and assigns the type based on the vertices, which are obtained from the superclass. Triangles are categorized as equilateral if all sides are equal, isosceles if at least 2 sides are equal, and scalene if no sides are equal.

• The constructor with three parameters calls the corresponding constructor of the superclass and assigns the type based on the vertices obtained from the superclass.

• The method getType returns the value of the type attribute of the Triangle class.

• The addVertex method is overridden from the Polygon class and displays the text "You cannot add another point in a triangle."

• The removeVertex method is overridden from the Polygon class and displays the text "You cannot remove another point in a triangle" and returns false.

Rectangle Class

The Rectangle class extends the Polygon class and includes additional features specific to rectangles:

• The constructor with four parameters creates a rectangle based on the Cartesian coordinates provided. It utilizes the constructor and methods of the superclass to implement this constructor.

• The method computeDiagonalLength returns the length of the diagonal of the rectangle.

• The method getCentroid returns the centroid point of the rectangle.

• The addVertex method is overridden from the Polygon class and displays the text "You cannot add another point in a rectangle."

• The removeVertex method is overridden from the Polygon class and displays the text "You cannot remove another point in a rectangle" and returns false.

Contribution

Contributions to this repository are welcome. If you would like to contribute, please follow these steps:

1. Fork the repository by clicking on the "Fork" button on the repository's page.

2. Clone your forked repository to your local machine:

   git clone https://github.com/your-username/name-of-repo.git
   

3. Create a new branch for your changes:

   git checkout -b feature/new-feature
   

4. Make your desired changes and commit them:

   git commit -m "Add new feature"
   

5. Push your changes to your forked repository:

   git push origin feature/new-feature
   

6. Open a pull request on the original repository's page and describe your changes.

Once your pull request is reviewed and approved, it will be merged into the main repository. Thank you for your contribution!

Credits

This project was created by Sir Jomari Joseph Barera, an instructor at Visayas State University, as part of the Laboratory Exam in OOP in Java.