instead of updating the beams position in one of the think functions
(which sound like they're being called after the beam is rendered),
try using the ViewModelDrawn() function to update the beam's position
and then use beams->DrawBeam() to render it with the correct position.
check out the RPG, as it uses a similar hack to update the laser dot's
position so it matches your crosshairs position
On 8/27/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Hmmm...I've put this to one side for the time being, as I have more
> pressing matters to contend with. When I did play around with the proto
> sniper code though, I didn't manage to get it to work. :(
>
> Thanks for all the help everybody anyway. :)
>
> Skyler York wrote:
>
> Check out proto_sniper.cpp on the server. It's the Combine sniper and
> it uses a CBeam, which appears pretty smooth and fast to me in-game.
> However that might just be because it's coded to have smooth movement.
>
> DrBob wrote:
>
>
> OK. I tried your code verbatim, and it made the beam dance in a little
> ball around my muzzle. I modified it to get the proper angles (which gave
> me basically the same code as I had before), and I've got the following in
> my beam update function (which is called by ItemPostFrame in the weapon
> class, as ItemBusyFrame seems to only be called once during the execution
> of the whole game):
>
> #ifdef CLIENT_DLL
> if( m_Beam.m_hLinkedToEntity != NULL )
> {
> Vector endPos, shotDir;
> endPos = m_Beam.m_hLinkedToEntity->Weapon_ShootPosition();
> m_Beam.m_hLinkedToEntity->EyeVectors( &shotDir );
> trace_t tr;
> UTIL_TraceLine( endPos, endPos + ( shotDir *
> MAX_TRACE_LENGTH ),
> MASK_SHOT, m_Beam.m_hLinkedToEntity, COLLISION_GROUP_NONE, &tr );
> endPos = tr.endpos;
> m_Beam.UpdateEndPosition( endPos );
> }
> #endif // CLIENT_DLL
>
> It's just as slow as before. I have a feeling I should be using a CBeam,
> but I don't know. To be honest, there's no real documentation I could find
> about the differences between CBeam and BeamInfo_t, and all the different
> types of beams, etc. :S
>
>
> Alex Thomson wrote:
>
>
>
>
> You'll want to link the beam to an entity (the character that fired it,
> or possibly even the weapon which fired it). Probably the best way to do
> this is something like:
>
> [in your beam class declaration]
> CHandle<CBaseEntity> m_hLinkedToEntity;
>
> [in your beam spawn function]
> pBeam->hLinkedToEntity = pPlayerWhoFiredMe;
>
> [in your beam update function e.g. ItemBusyFrame]
> if( hLinkedToEntity != NULL )
> {
> my_end_point = hLinkedToEntity->Weapon_ShootPosition();
> }
>
> So if the beam's linked to an entity, it will update the beam's position
> every frame. Provided your class is defined on the client and the
> server, this will update both.
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Sent: 15 August 2005 10:16
> To: hlcoders@list.valvesoftware.com
> Subject: [hlcoders] Beams that move with you
>
> Right. I'm still working on this beam weapon, and I've just decided that
> my beam code isn't good enough. :P
>
> Currently, I'm setting up a BeamInfo_t structure, and then displaying it
> using beams->CreateBeamEntPoint( beamInfo ), where "beams" is the
> statically exposed IViewRenderBeams object.
>
> This is fine, until you come to move; the end point of the beam stays
> anchored to one point. It was late at night when I encountered this, so
> I
> just hackhacked it to update the end point of the beam with a freshly
> calculated vector based on the player's eye angles every frame.
>
> My problem is that this is OK for beams that switch off quickly, but for
> continuous-fire beams (a la Star Trek phaser), it lags. Badly.
>
> Is there a beam creation function similar to CreateBeamEntPoint that
> would
> take, for example, a start point, and a vector, and make the beam always
> point in that direction, transparently? Or, have I got it all wrong, and
> should I be using a CBeam?
>
> :S
>
>
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