Implement RayCast

[yderidde]

I saw in the codebase that RayCast is not implemented. Is there a chance you implement it ?

Here the snippet from b2Fixture:
/// Cast a ray against this shape.
/// @PARAM output the ray-cast results.
/// @PARAM input the ray-cast input parameters.
/// void RayCast(b2RayCastOutput* output, const b2RayCastInput& input) const;
public function RayCast():void {
/// NOT IMPLEMENTED.
}

[jesses]

You could probably just use the b2World RayCast and check if that shape is in the results for now. Waiting until the new Adobe Alchemy comes out before I make any big changes.

[yderidde]

I would need a b2RayCastOutput with the calculated fraction etc ... which is not what the RayCast in b2World provide so this is not an alternative for me i'm afraid :(

Considering that you know pretty well your code. I'm wondering why you didn't implement RayCast in b2Fixture ? is there a show-stopper or some kind of complexity that prevented you to implement it ?

[jesses]

You do get the fraction with the b2World::RayCast. It's passed into the raycast callback function.

Can't remember why I didn't implement it. Must've been a difficult function that I didn't think was worth the effort. No one has asked for it before now...

[yderidde]

Ok i will try with the b2World RayCast function but before that I have a very nasty issue and not sure at all where it comes from .. it is probably not the best place to discuss about it here but while I have you I will tell you :)

I'm getting an RTE when creating a b2Fixture from a shape or from the body. Here the stack:
TypeError: Error #1006: value is not a function.
at cmodule.Box2D::FSM__Z20b2Body_CreateFixturePvP8_AS3_Val/work()
at Function/()
at Function/()
at Box2DAS.Dynamics::b2Fixture()[/Developer/Repositories/app/app-client/src/main/air/Box2DAS/Dynamics/b2Fixture.as:25]
at Box2DAS.Collision.Shapes::b2Shape/create()[/Developer/Repositories/app/app-client/src/main/air/Box2DAS/Collision/Shapes/b2Shape.as:26]

Maybe we can take this one offline if you are ok with helping me figuring out what can it be :)

[jesses]

Can you post this to the Box2D WCK forums? I check that more than github. Please post the part of your code that results in that error. The forums are here:

http://box2d.org/forum/viewforum.php?f=19

[yderidde]

Done: http://box2d.org/forum/viewtopic.php?f=19&t=8178

[yderidde]

Jesses, can you please have a look at the thread here http://box2d.org/forum/viewtopic.php?f=19&t=8178
Would like to have your input on it. Thanks in advance. :)

[jesses]

Can't figure it out at first glance I'll take a look when I get some free time, probably this weekend.

[yderidde]

thanks for this !

[jesses]

Fixed:
http://box2d.org/forum/viewtopic.php?f=19&t=8178&p=35143#p35143