Collision Detection Iris Merilo 2016 What, where? the - PowerPoint PPT Presentation

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Collision Detection Iris Merilo 2016 What, where? the computational problem of detecting the intersection of two or more objects (multiple meshes, a mesh and a line (hitscan)) most often associated with its use in video games and

Collision Detection Iris Merilo 2016
What, where? ● the computational problem of detecting the intersection of two or more objects (multiple meshes, a mesh and a line (hitscan)) ● most often associated with its use in video games and other physical simulations (+ robotics etc)
Goals In simulations: * making predictions for real-life scenarios * be as accurate as possible In computer games * mimic physics in a way that is acceptable (for that type of game) * do so cheaply, in real time Movies? Something in between, most likely… Self-driving cars? Not to cause accidents...
How? Posteriori, discrete: * Increment the simulation in small steps, see whether anything is intersecting after each step. (most games) Priori, continuous: * Pre-calculate paths, then move objects Discrete collision detection is simpler, but more likely to produce errors (objects clipping through one another).
Problems? ● Expensive - Reuse calculations. - Simplify objects. - Simplify calculations. Bounding boxes, contact caching, “Sleeping objects”, space partitioning, pruning...
Whoops...
Now what? Collision response? Deformation? Scattering? Deduct health points?
Thank you!

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