Raycasting question

Aniketos · 12-05-2010 04:19 AM

I basically need to preform a straight line cast from vec a to vec b and get an *obj/chr reference to the object that got hit in between.

What would be the best way to do this code wise?

Dynad · 12-05-2010 01:32 PM

Hey,

Ive a snippet that i wrote months ago so im not sure if you need to change of it since the updates:

~Dynad

PHP Code:

void Player::Shoot()
{
    // calculate world position and direction vectors
    Vec     pos, dir; 
    ScreenToPosDir(Vec2(0,0),pos,dir);
    PhysHit phys_hit; 
        
    Bool temp=ctrl.actor.ray();
    ctrl.actor.ray(false);

    OrientP &head = cskel.getPoint("head");
    
    if(Physics.ray(head.pos,head.dir*D.viewRange(),&phys_hit))//, IndexToFlag(OBJ_CHR))) // if ray test hit an actor
    {
        if(phys_hit.obj) // if the actor comes from an object
        {
            if(Player *plr=CAST(Player,phys_hit.obj))// if the object is an item
            {
                chatGui.ChatAddMessage(S+"Player hit");
                plr->Hit();
            }
            else // the actor doesn't have an object set, so most probably it's a terrain actor
            {
                // add a decal to the world terrain
                Game::World.terrainAddDecal(WHITE,*Materials("Decal/bullet.mtrl"),Matrix().setPosDir(phys_hit.plane.pos, phys_hit.plane.normal).scaleOrn(0.05f));
            }
        }
    }
    ctrl.actor.ray(temp);
} 

Driklyn · 12-06-2010 07:18 AM

Also, have you looked at "EsenthelEngineSDK\Tutorials\Source\Advanced\2 - Animation, Physics, Rendering\Physics\06 - Ray testing.cpp"? Just use phys_hit.obj to get the object that got hit.

Raycasting question
Author	Message