Hi, I don't know how to answer this, but there's a mod out that unfortunately i can't remember the name, but the mod was all about changing the orientation of the players, and the gravity, so in one moment you where walking on the wall, and the next on the roof, but the view rotate to look correctly. Maybe if someone remembers the name of this mod you can ask them how they did that effect. But i don't know if it would apply to props.
2009/10/14 Locke Cole <[email protected]> > Hi hlcoders, > > in a project a friend is working on together we want the different gravity > directions for different objects in the game and further, we want that > direction to be able to change depending on the mechanics of the game. > > I found that changing the gravity is not as simple as it seen. First of > all, it seems to be applied differently for players and other entities. I > started with players though because that's the most important, other > entities can be implemented later. > > I found CGameMovement::AddGravity/StartGravity/FinnishGravity and changed > for example > > mv->m_vecVelocity[2] -= (ent_gravity * sv_gravity.GetFloat() * 0.5 * > gpGlobals->frametime ); > > into > > mv->m_vecVelocity.MulAdd(mv->m_vecVelocity, player->m_vecGravity, > ent_gravity * sv_gravity.GetFloat() * 0.5 * gpGlobals->frametime); > > I'll probably have to move mVecGravity somewhere else later, so far I'm > just trying this to see if I can make it work. First I tried with a gravity > = (1,0,0) and it worked fine apart from the fact that walkable floor is > still always in negative z-direction. That's something I have to change in > other parts of the code, possibly CategorizePosition or something but that's > a later problem because I found another thing. > > If I try a gravity = (0,0,1) (positive z-direction) it did Not work, at > least I wasn't falling upwards. I think somehow the z-velocity is simply > zero:ed if the game thinks you're standing on walkable floor as seen in > CGameMovement::FullWalkMove > > // If we are on ground, no downward velocity. > if ( player->GetGroundEntity() != NULL ) > { > mv->m_vecVelocity[2] = 0; > } > > I tried temporarily commenting this out, and some other similar snippets in > that method but still I wasn't falling upwards. I'm thinking the same trick > is being performed somewhere else in the code but it suspect I will spend a > whole lot time searching for it. I'll throw the debugger at it probably but > I'm unfortunately not super skilled in debuggers and I'm kind of scared it > will blow up on me with execution jumping back and forth between engine code > and sdk code. > > So I ask you for input, why do you think a positive gravity direction isn't > working? Where do you think I should start looking. > > Thank you for your time, hlcoders. I'm obviously new here. Oh, I forgot to > say that this is the scrath sdk... because I never got hl2, all I have is > l4d. > > /Elias 'Locke' Wulcan > > _______________________________________________ > To unsubscribe, edit your list preferences, or view the list archives, > please visit: > http://list.valvesoftware.com/mailman/listinfo/hlcoders > > _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: http://list.valvesoftware.com/mailman/listinfo/hlcoders
