VideoGames

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Video Game Physics Tutorial - Part III: Constrained Rigid Body Simulation

by Nilson Souto

In Part I of this three-part series, we saw how the free motion of rigid bodies can be simulated. In Part II, we saw how to make bodies aware of each other through collision and proximity tests. Up to this point, however, we still have not seen how to make objects truly interact with each other. The final step to simulating realistic, solid objects, is to apply constraints, defining restrictions on the motion of rigid bodies. In this article, we'll discuss equality constraints and inequality constraints. We'll describe them first in terms of a force-based approach, where corrective forces are computed, and then in terms of an impulse-based approach, where corrective velocities are computed instead. Finally, we'll go over some clever tricks to eliminate unnecessary work and speed up computation.

25+ minute readContinue Reading
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Video Game Physics Tutorial - Part II: Collision Detection for Solid Objects

by Nilson Souto

In Part I of this three-part series on game physics, we explored rigid bodies and their motions. In that discussion, however, objects did not interact with each other. Without some additional work, the simulated rigid bodies can go right through each other. In Part II, we will cover the collision detection step, which consists of finding pairs of bodies that are colliding among a possibly large number of bodies scattered around a 2D or 3D world.

21 minute readContinue Reading
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Making an HTML5 Canvas Based Game: A Tutorial Using AngularJS and CreateJS

by Avinash Kaza

There are many programming platforms used to develop games, and there are a plethora of devices to play them on, but when it comes to playing games in a web browser, Flash-based development still leads the way. What if we could port these games to HTML5 Canvas technology and play them on mobile browsers as well? In this article, Toptal engineer Avinash Kaza gave a solution to this.

16 minute readContinue Reading
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Video Game Physics Tutorial - Part I: An Introduction to Rigid Body Dynamics

by Nilson Souto

Simulating physics in video games is very common, since most games are inspired by things we have in the real world. Rigid body dynamics -- the movement and interaction of solid, inflexible objects -- is by far the most popular kind of effect simulated in games. In this series, rigid body simulation will be explored, starting with simple rigid body motion in this article, and then covering interactions among bodies through collisions and constraints in the following installments.

18 minute readContinue Reading

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