C++ FState类代码示例

bool AWeapon::TryPickup (AActor *&toucher)
{
	FState * ReadyState = FindState(NAME_Ready);
	if (ReadyState != NULL &&
		ReadyState->GetFrame() < sprites[ReadyState->sprite].numframes)
	{
		return Super::TryPickup (toucher);
	}
	return false;
}

bool gl_IsHUDModelForPlayerAvailable (player_t * player)
{
	if ( (player == NULL) || (player->ReadyWeapon == NULL) || (player->psprites[0].state == NULL) )
		return false;

	FState* state = player->psprites[0].state;
	FSpriteModelFrame *smf = gl_FindModelFrame(player->ReadyWeapon->GetClass(), state->sprite, state->GetFrame());
	return ( smf != NULL );
}

END_DEFAULTS

bool APainElemental::Massacre ()
{
	if (Super::Massacre ())
	{
		FState *deadstate;
		A_NoBlocking (this);	// [RH] Use this instead of A_PainDie
		deadstate = DeathState;
		if (deadstate != NULL)
		{
			while (deadstate->GetNextState() != NULL)
				deadstate = deadstate->GetNextState();
			SetState (deadstate);
		}
		return true;
	}
	return false;
}

bool gl_IsHUDModelForPlayerAvailable (player_t * player)
{
	if (player == nullptr || player->ReadyWeapon == nullptr)
		return false;

	DPSprite *psp = player->FindPSprite(PSP_WEAPON);

	if (psp == nullptr || psp->GetState() == nullptr)
		return false;

	FState* state = psp->GetState();
	FSpriteModelFrame *smf = gl_FindModelFrame(player->ReadyWeapon->GetClass(), state->sprite, state->GetFrame(), false);
	return ( smf != nullptr );
}

static void DrawOneKey(int xo, int & x, int & y, int & c, AInventory * inv)
{
	FTextureID icon = FNullTextureID();
	FTextureID AltIcon = GetHUDIcon(inv->GetClass());

	if (!AltIcon.Exists()) return;

	if (AltIcon.isValid()) 
	{
		icon = AltIcon;
	}
	else if (inv->SpawnState && inv->SpawnState->sprite!=0)
	{
		FState * state = inv->SpawnState;
		if (state &&  (unsigned)state->sprite < (unsigned)sprites.Size ())
		{
			spritedef_t * sprdef = &sprites[state->sprite];
			spriteframe_t * sprframe = &SpriteFrames[sprdef->spriteframes + state->GetFrame()];
			icon = sprframe->Texture[0];
		}
	}
	if (icon.isNull()) icon = inv->Icon;

	if (icon.isValid())	
	{
		x -= 9;
		DrawImageToBox(TexMan[icon], x, y, 8, 10);
		c++;
		if (c>=10)
		{
			x=xo;
			y-=11;
			c=0;
		}
	}
}

//==========================================================================
//***
// DoActionSpecials
// handles action specials as code pointers
//
//==========================================================================
bool DoActionSpecials(FScanner &sc, FState & state, Baggage &bag)
{
	int i;
	int min_args, max_args;
	FString specname = sc.String;

	int special = P_FindLineSpecial(sc.String, &min_args, &max_args);

	if (special > 0 && min_args >= 0)
	{

		int paramindex=PrepareStateParameters(&state, 6, bag.Info->Class);

		StateParams.Set(paramindex, new FxConstant(special, sc));

		// Make this consistent with all other parameter parsing
		if (sc.CheckToken('('))
		{
			for (i = 0; i < 5;)
			{
				StateParams.Set(paramindex+i+1, ParseExpression (sc, bag.Info->Class));
				i++;
				if (!sc.CheckToken (',')) break;
			}
			sc.MustGetToken (')');
		}
		else i=0;

		if (i < min_args)
		{
			sc.ScriptError ("Too few arguments to %s", specname.GetChars());
		}
		if (i > max_args)
		{
			sc.ScriptError ("Too many arguments to %s", specname.GetChars());
		}

		state.SetAction(FindGlobalActionFunction("A_CallSpecial"), false);
		return true;
	}
	return false;
}

void gl_RenderFrameModels( const FSpriteModelFrame *smf,
						   const FState *curState,
						   const int curTics,
						   const PClass *ti,
						   Matrix3x4 *normaltransform,
						   int translation)
{
	// [BB] Frame interpolation: Find the FSpriteModelFrame smfNext which follows after smf in the animation
	// and the scalar value inter ( element of [0,1) ), both necessary to determine the interpolated frame.
	FSpriteModelFrame * smfNext = nullptr;
	double inter = 0.;
	if( gl_interpolate_model_frames && !(smf->flags & MDL_NOINTERPOLATION) )
	{
		FState *nextState = curState->GetNextState( );
		if( curState != nextState && nextState )
		{
			// [BB] To interpolate at more than 35 fps we take tic fractions into account.
			float ticFraction = 0.;
			// [BB] In case the tic counter is frozen we have to leave ticFraction at zero.
			if ( ConsoleState == c_up && menuactive != MENU_On && !(level.flags2 & LEVEL2_FROZEN) )
			{
				float time = GetTimeFloat();
				ticFraction = (time - static_cast<int>(time));
			}
			inter = static_cast<double>(curState->Tics - curTics - ticFraction)/static_cast<double>(curState->Tics);

			// [BB] For some actors (e.g. ZPoisonShroom) spr->actor->tics can be bigger than curState->Tics.
			// In this case inter is negative and we need to set it to zero.
			if ( inter < 0. )
				inter = 0.;
			else
			{
				// [BB] Workaround for actors that use the same frame twice in a row.
				// Most of the standard Doom monsters do this in their see state.
				if ( (smf->flags & MDL_INTERPOLATEDOUBLEDFRAMES) )
				{
					const FState *prevState = curState - 1;
					if ( (curState->sprite == prevState->sprite) && ( curState->Frame == prevState->Frame) )
					{
						inter /= 2.;
						inter += 0.5;
					}
					if ( (curState->sprite == nextState->sprite) && ( curState->Frame == nextState->Frame) )
					{
						inter /= 2.;
						nextState = nextState->GetNextState( );
					}
				}
				if ( inter != 0.0 )
					smfNext = gl_FindModelFrame(ti, nextState->sprite, nextState->Frame, false);
			}
		}
	}

	for(int i=0; i<MAX_MODELS_PER_FRAME; i++)
	{
		if (smf->modelIDs[i] != -1)
		{
			FModel * mdl = Models[smf->modelIDs[i]];
			FTexture *tex = smf->skinIDs[i].isValid()? TexMan(smf->skinIDs[i]) : nullptr;
			mdl->BuildVertexBuffer();
			gl_RenderState.SetVertexBuffer(mdl->mVBuf);

			mdl->PushSpriteMDLFrame(smf, i);

			if ( smfNext && smf->modelframes[i] != smfNext->modelframes[i] )
				mdl->RenderFrame(tex, smf->modelframes[i], smfNext->modelframes[i], inter, translation);
			else
				mdl->RenderFrame(tex, smf->modelframes[i], smf->modelframes[i], 0.f, translation);

			gl_RenderState.SetVertexBuffer(GLRenderer->mVBO);
		}
	}
}

//==========================================================================
//***
// ParseStates
// parses a state block
//
//==========================================================================
void ParseStates(FScanner &sc, FActorInfo * actor, AActor * defaults, Baggage &bag)
{
	FString statestring;
	FState state;
	char lastsprite[5]="";

	sc.MustGetStringName ("{");
	sc.SetEscape(false);	// disable escape sequences in the state parser
	while (!sc.CheckString ("}") && !sc.End)
	{
		memset(&state,0,sizeof(state));
		statestring = ParseStateString(sc);
		if (!statestring.CompareNoCase("GOTO"))
		{
do_goto:	
			statestring = ParseStateString(sc);
			if (sc.CheckString ("+"))
			{
				sc.MustGetNumber ();
				statestring += '+';
				statestring += sc.String;
			}
			if (!bag.statedef.SetGotoLabel(statestring))
			{
				sc.ScriptError("GOTO before first state");
			}
		}
		else if (!statestring.CompareNoCase("STOP"))
		{
do_stop:
			if (!bag.statedef.SetStop())
			{
				sc.ScriptError("STOP before first state");
				continue;
			}
		}
		else if (!statestring.CompareNoCase("WAIT") || !statestring.CompareNoCase("FAIL"))
		{
			if (!bag.statedef.SetWait())
			{
				sc.ScriptError("%s before first state", sc.String);
				continue;
			}
		}
		else if (!statestring.CompareNoCase("LOOP"))
		{
			if (!bag.statedef.SetLoop())
			{
				sc.ScriptError("LOOP before first state");
				continue;
			}
		}
		else
		{
			sc.MustGetString();
			if (sc.Compare (":"))
			{
				do
				{
					bag.statedef.AddStateLabel(statestring);
					statestring = ParseStateString(sc);
					if (!statestring.CompareNoCase("GOTO"))
					{
						goto do_goto;
					}
					else if (!statestring.CompareNoCase("STOP"))
					{
						goto do_stop;
					}
					sc.MustGetString ();
				} while (sc.Compare (":"));
//				continue;
			}

			sc.UnGet ();

			if (statestring.Len() != 4)
			{
				sc.ScriptError ("Sprite names must be exactly 4 characters\n");
			}

			state.sprite = GetSpriteIndex(statestring);
			state.Misc1 = state.Misc2 = 0;
			state.ParameterIndex = 0;
			sc.MustGetString();
			statestring = sc.String;

			if (sc.CheckString("RANDOM"))
			{
				int min, max;

				sc.MustGetStringName("(");
				sc.MustGetNumber();
				min = clamp<int>(sc.Number, -1, SHRT_MAX);
//.........这里部分代码省略.........