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This p5.js code creates a visual effect where colorful 3D boxes appear to come toward the viewer from a distance. The boxes are managed using an array of objects. Each box moves along the Z-axis toward the front, and when its Z value exceeds a certain threshold, it is reset to a random position and color far in the background. This creates an endless loop of boxes flowing toward the viewer while keeping rendering performance efficient and animation smooth.

Additionally, the orbitControl() function allows users to rotate, zoom, and pan the view using the mouse. This feature is unique to p5.js and is not part of native WebGL. Under the hood, p5.js listens for mouse events on the canvas and uses them to dynamically update the camera's position and orientation via the camera() function. This creates an intuitive "orbit camera" effect centered around the origin. By abstracting away the low-level complexities of WebGL camera control, p5.js makes interactive 3D viewing easy to implement.

https://geni.us/zgpTp9