How to Script an Arcade Basketball Game: Principles and Logic

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Few mechanical bugs ruin a sports game faster than a ball clipping through the bottom of the net and incorrectly registering as a three-pointer. Solving hoop collision detection requires separating the physical rim structure from the scoring trigger logic.

The physical rim consists of a composite ring of smoothed capsule colliders combined with a specialized ball bounce physics material. This physics material demands zero friction and a bounce bounciness coefficient between 0.68 and 0.78. High friction causes balls to unnaturally stick to the rim, killing momentum. Setting friction to zero ensures that glancing hits glance off realistically, preserving forward kinetic speed.

Scoring verification requires two stacked, invisible box triggers positioned inside the cylinder of the hoop:

1. Trigger Upper: Placed flush with the metal rim opening.

1. Trigger Lower: Placed 0.3 units below the upper trigger, near the base of the mesh net.

A successful basket registers only if the basketball enters Trigger Upper first and hits Trigger Lower within a strict 150-to-300 millisecond window. If the ball enters Trigger Lower first, such as during an upward bounce or erratic tip-in, the scoring script resets immediately. When verified, the scoring event fires net animation triggers that deform the mesh, blares the point sound effect, and flashes the backboard LEDs.