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240 lines
6.8 KiB
240 lines
6.8 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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Additional permissions under GNU GPL version 3 section 7 |
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If you modify this Program, or any covered work, by linking or |
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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK, |
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NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent |
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JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK |
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(or a modified version of those libraries), |
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containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA, |
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PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG |
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JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the |
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licensors of this Program grant you additional |
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permission to convey the resulting work. Corresponding Source for a |
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non-source form of such a combination shall include the source code for |
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the parts of OpenSSL and IJG JPEG Library used as well as that of the covered |
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work. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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#include "hsTypes.h" |
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#include "plBlower.h" |
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#include "plgDispatch.h" |
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#include "hsFastMath.h" |
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#include "pnSceneObject/plSceneObject.h" |
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#include "pnSceneObject/plCoordinateInterface.h" |
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#include "pnMessage/plTimeMsg.h" |
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#include "hsTimer.h" |
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plRandom plBlower::fRandom; |
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static const hsScalar kDefaultMasterPower = 20.f; |
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static const hsScalar kDefaultMasterFrequency = 2.f; |
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static const hsScalar kDefaultDirectRate = 1.f; |
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static const hsScalar kDefaultImpulseRate = 1.e2f; |
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static const hsScalar kDefaultSpringKonst = 20.f; |
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static const hsScalar kDefaultBias = 0.25f; |
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static const hsScalar kInitialMaxOffDist = 1.f; |
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plBlower::plBlower() |
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: |
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fMasterPower(kDefaultMasterPower), |
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fMasterFrequency(kDefaultMasterFrequency), |
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fDirectRate(kDefaultDirectRate), |
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fImpulseRate(kDefaultImpulseRate), |
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fSpringKonst(kDefaultSpringKonst), |
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fBias(kDefaultBias), |
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fMaxOffsetDist(kInitialMaxOffDist), |
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fAccumTime(0) |
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{ |
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fRestPos.Set(0,0,0); |
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fLocalRestPos.Set(0,0,0); |
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fCurrDel.Set(0,0,0); |
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fDirection.Set(fRandom.RandMinusOneToOne(), fRandom.RandMinusOneToOne(), 0); |
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hsFastMath::NormalizeAppr(fDirection); |
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} |
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plBlower::~plBlower() |
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{ |
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} |
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void plBlower::IBlow(double secs, hsScalar delSecs) |
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{ |
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hsPoint3 worldPos = fTarget->GetLocalToWorld().GetTranslate(); |
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hsPoint3 localPos = fTarget->GetLocalToParent().GetTranslate(); |
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// fast oscillation vs slow |
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// Completely random walk in the rotation |
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// Strength = Strength + rnd01 * (MaxStrength - Strength) |
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hsScalar t = (fAccumTime += delSecs); |
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hsScalar strength = 0; |
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int i; |
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for( i = 0; i < fOscillators.GetCount(); i++ ) |
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{ |
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hsScalar c, s; |
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t *= fOscillators[i].fFrequency * fMasterFrequency; |
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t += fOscillators[i].fPhase; |
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hsFastMath::SinCosAppr(t, s, c); |
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c += fBias; |
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strength += c * fOscillators[i].fPower; |
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} |
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strength *= fMasterPower; |
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if( strength < 0 ) |
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strength = 0; |
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fDirection.fX += fRandom.RandMinusOneToOne() * delSecs * fDirectRate; |
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fDirection.fY += fRandom.RandMinusOneToOne() * delSecs * fDirectRate; |
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hsFastMath::NormalizeAppr(fDirection); |
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hsScalar offDist = hsVector3(&fRestPos, &worldPos).Magnitude(); |
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if( offDist > fMaxOffsetDist ) |
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fMaxOffsetDist = offDist; |
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hsVector3 force = fDirection * strength; |
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static hsScalar kOffsetDistFrac = 0.5f; // make me const |
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if( offDist > fMaxOffsetDist * kOffsetDistFrac ) |
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{ |
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offDist /= fMaxOffsetDist; |
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offDist *= fMasterPower; |
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hsScalar impulse = offDist * delSecs * fImpulseRate; |
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force.fX += impulse * fRandom.RandMinusOneToOne(); |
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force.fY += impulse * fRandom.RandMinusOneToOne(); |
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force.fZ += impulse * fRandom.RandMinusOneToOne(); |
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} |
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const hsScalar kOffsetDistDecay = 0.999f; |
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fMaxOffsetDist *= kOffsetDistDecay; |
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hsVector3 accel = force; |
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accel += fSpringKonst * hsVector3(&fLocalRestPos, &localPos); |
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hsVector3 del = accel * (delSecs * delSecs); |
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fCurrDel = del; |
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} |
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hsBool plBlower::IEval(double secs, hsScalar delSecs, UInt32 dirty) |
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{ |
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const hsScalar kMaxDelSecs = 0.1f; |
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if( delSecs > kMaxDelSecs ) |
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delSecs = kMaxDelSecs; |
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IBlow(secs, delSecs); |
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ISetTargetTransform(); |
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return true; |
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} |
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void plBlower::ISetTargetTransform() |
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{ |
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plCoordinateInterface* ci = IGetTargetCoordinateInterface(0); |
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if( ci ) |
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{ |
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hsMatrix44 l2p = ci->GetLocalToParent(); |
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hsMatrix44 p2l = ci->GetParentToLocal(); |
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hsPoint3 pos = l2p.GetTranslate(); |
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pos += fCurrDel; |
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l2p.SetTranslate(&pos); |
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p2l.SetTranslate(&-pos); |
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ci->SetLocalToParent(l2p, p2l); |
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} |
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} |
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void plBlower::SetTarget(plSceneObject* so) |
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{ |
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plSingleModifier::SetTarget(so); |
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if( fTarget ) |
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{ |
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fRestPos = fTarget->GetLocalToWorld().GetTranslate(); |
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fLocalRestPos = fTarget->GetLocalToParent().GetTranslate(); |
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plgDispatch::Dispatch()->RegisterForExactType(plEvalMsg::Index(), GetKey()); |
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} |
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IInitOscillators(); |
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} |
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void plBlower::Read(hsStream* s, hsResMgr* mgr) |
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{ |
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plSingleModifier::Read(s, mgr); |
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fMasterPower = s->ReadLEScalar(); |
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fDirectRate = s->ReadLEScalar(); |
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fImpulseRate = s->ReadLEScalar(); |
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fSpringKonst = s->ReadLEScalar(); |
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} |
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void plBlower::Write(hsStream* s, hsResMgr* mgr) |
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{ |
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plSingleModifier::Write(s, mgr); |
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s->WriteLEScalar(fMasterPower); |
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s->WriteLEScalar(fDirectRate); |
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s->WriteLEScalar(fImpulseRate); |
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s->WriteLEScalar(fSpringKonst); |
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} |
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void plBlower::IInitOscillators() |
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{ |
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const hsScalar kBasePower = 5.f; |
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fOscillators.SetCount(5); |
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int i; |
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for( i = 0; i < fOscillators.GetCount(); i++ ) |
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{ |
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hsScalar fi = hsScalar(i+1); |
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fOscillators[i].fFrequency = fi / hsScalarPI * fRandom.RandRangeF(0.75f, 1.25f); |
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// fOscillators[i].fFrequency = 1.f / hsScalarPI * fRandom.RandRangeF(0.5f, 1.5f); |
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fOscillators[i].fPhase = fRandom.RandZeroToOne(); |
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fOscillators[i].fPower = kBasePower * fRandom.RandRangeF(0.75f, 1.25f); |
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} |
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} |
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void plBlower::SetConstancy(hsScalar f) |
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{ |
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if( f < 0 ) |
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f = 0; |
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else if( f > 1.f ) |
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f = 1.f; |
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fBias = f; |
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} |
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hsScalar plBlower::GetConstancy() const |
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{ |
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return fBias; |
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} |