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What kind of issues does Box2D deal with?
A big issue that Box2D deals with and stresses is collision detection. Collision detection is especially emphasized in video games. Very generally, it is the issue of two game objects, (buildings, characters, etc.), colliding with one another.
What is the purpose of the collision module in Box2D?
However, the main purpose of Box2D is to provide a rigid body physics engine, so the using the collision module by itself may feel limited for some applications. Likewise, I will not make a strong effort to document it or polish the APIs. Shapes describe collision geometry and may be used independently of physics simulation.
How are ghost vertices used in Box2D algorithm?
Box2D uses these ghost vertices to prevent internal collisions. The Box2D algorithm for dealing with ghost collisions only supports one-sided collision. The front face is to the right when looking from the first vertex towards the second vertex. This matches the CCW winding order used by polygons. // This is an edge shape with ghost vertices.
Why do I get Ghost collisions in Box2D?
These ghost collisions are caused when the polygon collides with an internal vertex generating an internal collision normal. If edge1 did not exist this collision would seem fine. With edge1 present, the internal collision seems like a bug. But normally when Box2D collides two shapes, it views them in isolation.
Is the Box2D physics engine free to use?
Box2D is a feature rich 2D rigid body physics engine, written in C++ by Erin Catto. It has been used in many games, including Crayon Physics Deluxe, winner of the 2008 Independant Game Festival Grand Prize. Box2D uses the MIT licenselicense and can be used free of charge.
How big does a moving object need to be in Box2D?
Box2D is tuned for meters-kilograms-seconds (MKS). Your moving objects should be between 0.1 – 10 meters. Do not use pixels as units! You will get a jittery simulation. How do I convert pixels to meters?
Who is the creator of the Box2D engine?
What is Box2D? Box2D is a feature rich 2D rigid body physics engine, written in C++ by Erin Catto. It has been used in many games, including Crayon Physics Deluxe, winner of the 2008 Independant Game Festival Grand Prize. Box2D uses the MIT licenselicense and can be used free of charge.
When did the Box2D game engine come out?
First released in 2007 as Box2D Lite, what we now know of Box2D has had a most recent stable release in April of 2014. What is the best way to sum up what Box2D is? Here, let the developers explain, “Box2D is an open source C++ engine for simulating rigid bodies in 2D. Box2D is developed by Erin Catto and has the zlib license.
Can you use Box2D engine on Nintendo DS?
Box2D engine has been included in some titles on the Nintendo DS, the Wii, and others, and offers cross-platform. This includes the potential to port to mobile phones especially. Imagine you develop a new, more modern version of the cellphone classic ‘Snake’. I can already hear the cartoonish cash registers going ‘KA-CHING’.
Which is part of the Box2D collision detection system?
Box2D’s collision detection and resolution system consists of three pieces: an incremental sweep and prune broadphase, a continuous collision detection unit, and a stable linear-time contact solver. These algorithms allow efficient simulations of fast bodies and large stacks without missing collisions or causing instabilities.
How big should an object be in Box2D?
Caution: Box2D is tuned for MKS units. Keep the size of moving objects roughly between 0.1 and 10 meters. You’ll need to use some scaling system when you render your environment and actors. The Box2D testbed does this by using an OpenGL viewport transform.
What kind of body simulation does Box2D do?
Box2D performs constrained rigid body simulation. It can simulate bodies composed of convex polygons, circles, and edge shapes. Bodies are joined together with joints and acted upon by forces. The engine also applies gravity, friction, and restitution.