Collision Detection

What Does Collision Detection Mean?

Collision detection algorithmically calculates impact time by identifying two or more object intersection points. Collision detection is also a virtual interface that determines user and object distance for collision prevention.

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Collision detection is a key 3-D component associated with robotics, video games and physical simulation.

Techopedia Explains Collision Detection

Collision detection concepts are based on computational geometry and linear algebra and include the following methods:

Vector usage: Measures object distance and calculates length via the square root of each vector component’s square sum. Divides each vector component by vector magnitude, which equal a sum of 1.
Plane detection: Easily identifies 3-D sphere collisions, as individual comparison of complex model polygons is not required.

Physical simulators: Detects collision events before collision event (priori) and after collision event (posteriori).

Collision detection events are detected by network nodes and recovered via protocols like Carrier Sense Multiple Access/Collision Detection (CSMA/CD).

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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.