Retrieving Actor from PhysHit

andargor · 04-24-2011 08:09 PM

I'm trying to select an Actor with the mouse and have the camera center on it, have it be the focus of commands, etc.

I'm using PhysHit and Physics.ray to determine if I clicked on an actor. However, the obj member is null.

actor is defined as private in PhysHit, so I can't access it when doing Physics.ray. I can see it being set properly when debugging.

Code:

//Register click

    if(Ms.b(0)) {

        Vec screen_pos, screen_dir;

        ScreenToPosDir(Ms.pos(), screen_pos, screen_dir);

        // now having world space position and direction we can calculate ray 'start' and 'end' positions

        Vec start=screen_pos, end=screen_pos + screen_dir*D.viewRange();

        // having ray positions we can perform a ray test

        PhysHit phys_hit;

        if(Physics.ray(start,end-start,&phys_hit)) { // if ray hit something

             D.text(0,0.9f,  "Ray has hit an actor");

             D.text(0,0.8f,S+"Actor's group: "            +         phys_hit.group);

             D.text(0,0.7f,S+"Actor's user data (index): "+(UIntPtr)phys_hit.user );

                         // The following is wrong, what to do?

             Actor *act  = CAST(Actor, phys_hit.obj);

             if (act != NULL) {

                selected_obj = act;

             }

        } else {

         D.text(0,0.9f,"Ray hasn't hit anything");

        }

    }

Mardok · 04-24-2011 09:00 PM

Code:

actor.user(&actor);

Actor *act = reinterpret_cast<Actor*>(physhit.user);

//but it's wrong way

//if you are using CAST and physhit.obj then you should create your own class based on Game::Obj

Code:

STRUCT(YourClass, Game::Obj)

//{

Actor your_actor;

};

YourClass *pObj;

if(Game::Obj *detected = CAST(YourClass, physhit.obj))

pObj = physhit.obj;

pObj->your_actor;

andargor · 04-24-2011 10:10 PM

Thanks! I'll try that out.

Retrieving Actor from PhysHit
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