Coding classes in Blaenau Gwent

A pinhole camera, the model inside every photo app and 3D game, maps a point in the world to the picture by dividing its sideways and upward distances by how far away it is. The learner places a camera at an adult's eye height, 1.6 metres, held perfectly level, with a lens like a typical phone's main camera, and points it at a 21.34 metre clock. The camera and street are our assumptions; only the clock's height comes from the record. The program works out the angle from the level line up to the clock's top and down to its base at different distances, and how tall the clock would appear in the frame.

Held level, our phone-like camera sees about 24.8 degrees above the horizon and the same below. The clock's top is 19.7 metres above the camera, so it only fits once the camera is about 43 metres back. Stand closer and you must tilt the phone upwards, and then the column's sides stop looking parallel and lean in towards each other, the converging verticals every architecture photographer fights. The learner can see this by projecting the column's edges with the camera tilted.

Now the street. The model draws an invented circular street of radius 25 metres around the clock and projects every point of it. The circle comes out as a very flat ellipse. From 60 metres away, its height in the picture is only 0.029 of its width; from 200 metres, 0.008. That ratio is close to the eye height divided by the distance, 1.6 over 60 or 1.6 over 200, which is why round plazas and roundabouts look like thin lines from the pavement and only show their shape from above. It is also why maps are drawn from overhead.

Seeing when a picture breaks the rules of geometry is a strong reason for Blaenau Gwent teenagers to learn to code in 2026. The longer argument is in why teenagers should still learn to code in 2026.