QuadCurve2D

QuadCurve2D is a class in Java's Abstract Window Toolkit (AWT) graphics library that represents a two-dimensional quadratic Bézier curve. A quadratic Bézier curve is defined by three points: a start point, a control point, and an end point. The curve starts at the start point, moves towards the control point, and ends at the end point. The control point influences the curvature of the path.

The QuadCurve2D class provides methods for creating, manipulating, and drawing quadratic Bézier curves. It is part of the java.awt.geom package, which contains classes for representing geometric primitives in two-dimensional space. Instances of QuadCurve2D can be used to define shapes, paths, and outlines in graphical applications.

Key methods associated with QuadCurve2D include those for setting the coordinates of the start, control, and end points. It also offers methods for retrieving these coordinates, calculating the bounding box of the curve, and checking for intersections with other geometric shapes. While QuadCurve2D itself defines the curve, it is typically used in conjunction with Java's Graphics2D rendering context to actually draw the curve on a screen or in an image.

Quadratic Bézier curves are simpler than cubic Bézier curves, requiring only one control point instead of two. This makes them efficient for defining less complex curves. They are commonly used in vector graphics, animation, and user interface design to create smooth, flowing lines and shapes.