[x3d-public] Triggers (detecting collisions) and physics settings – Castle Game Engine

[Michalis Kamburelis]

Good point. Castle Game Engine "triggers" indeed correspond to X3D
"CollisionSensor" nodes. No change to X3D necessary.

The physics support in CGE is not yet integrated with X3D nodes, our
rigid body concepts are defined outside of X3D. See
https://castle-engine.io/manual_physics.php , CGE user just
instantiates ObjectPascal classes like TRigidBody, TMeshCollider etc.

I expect that one day I will make such integration (to support X3D
"Rigid body physics" component). Then X3D "CollisionSensor" will be
just internally implemented using CGE triggers.

Best regards,
Michalis

pt., 22 lis 2019 o 18:37 Brutzman, Donald (Don) (CIV)
<brutzman at nps.edu> napisał(a):



>
> Recent blog post:
>
> "Triggers (detecting collisions) and physics settings – Castle Game Engine"
> https://castle-engine.io/wp/2019/11/02/triggers-detecting-collisions-and-physics-settings/
>
> > Thanks to Andrzej Kilijański and our physics engine Kraft, we add two features to our physics support:
> >
> >     We now support triggers. A trigger is a rigid body through which other objects “pass through”, but it still reports a collision. This is useful to observe when something passes through something else.
> >
> >     E.g. coins in “Mario” games could be implemented as triggers — when player collides with them, they are consumed, and player does not “bounce off” them like from a wall.
> >
> >     An example of using trigger is available in examples/physics/physics_2d_collisions, the green rectangle acts as a trigger there.
>
> Michalis, wondering if you think we need to make a modification to existing X3D nodes?  On first read, it looks like we have this use case covered already.
>
> * 23.4.2 Collision
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-WD1/Part01/components/navigation.html#Collision
>
> * 37.4.5 CollisionSensor
>    https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-WD1/Part01/components/rigid_physics.html#CollisionSensor
>
> all the best, Don
> --
> Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu
> Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
> X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman