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Physics simulation in 3d games

An Introduction to Physics Engines. Physics simulation in 3d games. Michael Sundqivst TV10S1M3. Overview – what is a physics e ngine? Collision types Rigid body d ynamics Soft body d ynamics Fluid dynamics Views for the future Summary. What is a physics engine?.

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Physics simulation in 3d games

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  1. An Introduction to Physics Engines Physics simulation in 3d games Michael Sundqivst TV10S1M3

  2. Overview – what is a physics engine? • Collision types • Rigid body dynamics • Soft body dynamics • Fluid dynamics • Views for the future • Summary

  3. What is a physics engine? • Simulates real-world physics • Knows generally about physics but isn’t pre-programmed for any game • Advantages: • Saves time • Quality of animation • Weaknesses: • Processor usage • Too big for certain projects • Scope

  4. Collision types • Two methods of detecting collisions: • Bounding-box: • Two meshes, one for viewing and one for calculating physics (collision geometry) • Broad phase collision detection • Finite-element: • 3-dimensional volumetric tesselation • Used by a solver to model stress

  5. Rigid Body Dynamics • Solid, non-deformable object • Enables rolling physics • Forces that affect movement: • Gravity – falling speed • Mass – force required to move the object • Examples: rolling balls, solid items • http://www.youtube.com/watch?v=MNhDCk2rD0Y

  6. Soft Body Dynamics • Physical simulation of deformable objects • Tries to contain original shape (unlike fluids) • Generally only visually plausible emulations • Uses: destructible materials, plasticity and melting, hair, fur, simulated organs • http://www.youtube.com/watch?v=qdusMZlBbQ4

  7. Fluid Dynamics • Interaction of liquids and gases with surfaces defined by boundary conditions • Made of numerous particles, usually acting within a grid • Common uses: liquids, smoke, fire, explosions, gases • http://www.youtube.com/watch?v=x_IwYVLNiOs

  8. Views for the future • More processing power = better quality • Even more realistic engines • Growing usage on mobile devices • Visually stunning games

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