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315 lines
7.3 KiB
315 lines
7.3 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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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 "hsMemory.h" |
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#include "hsSfxDistFade.h" |
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#include "hsStream.h" |
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#include "../plPipeline/plPipeline.h" |
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#include "../plGeometry/hsTriangle3.h" |
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#include "../plDrawable/plDrawable.h" |
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#include "../plIntersect/hsBounds.h" |
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static hsScalar globalScale = 1.f; |
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hsSfxDistFade::hsSfxDistFade() |
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: fMinDist(0), fMaxDist(0) |
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{ |
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} |
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hsSfxDistFade::~hsSfxDistFade() |
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{ |
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} |
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hsScalar hsSfxDistFade::IOpacFromDist(hsScalar dist) |
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{ |
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if( dist <= fTable[0].fDistDel ) |
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return fTable[0].fOpacity; |
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int i; |
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for( i = 0; (i < fTable.GetCount()) && (dist >= fTable[i].fDistDel); i++ ) |
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dist -= fTable[i].fDistDel; |
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if( i >= fTable.GetCount() ) |
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return fTable[fTable.GetCount()-1].fOpacity; |
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dist *= fTable[i-1].fDistNorm; |
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hsScalar opac0 = fTable[i-1].fOpacity; |
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hsScalar opac1 = fTable[i].fOpacity; |
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return opac0 + dist * (opac1 - opac0); |
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} |
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hsBool32 hsSfxDistFade::BeginObject(plPipeline* pipe, plDrawable* obj) |
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{ |
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hsGRenderProcs::BeginObject(pipe, obj); |
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fFlags &= ~(kCulled | kNOP); |
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hsPoint3 vPos; |
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if( GetObjectRef(1) ) |
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{ |
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hsPoint3 wPos; |
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GetObjectRef(1)->GetLocalToWorld().GetTranslate(&wPos); |
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hsMatrix44 w2l = fPipeline->GetWorldToLocal(); |
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vPos = w2l * wPos; |
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} |
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else |
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{ |
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vPos = fPipeline->GetViewPositionLocal(); |
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} |
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hsScalar scale = 1.f / fPipeline->GetLocalScale(); |
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scale *= globalScale; |
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const hsBounds3Ext& bnd = obj->GetLocalBounds(); |
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hsPoint3 inner, outer; |
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bnd.ClosestPoint(vPos, inner, outer); |
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hsScalar minDist, maxDist; |
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minDist = hsVector3(&vPos, &inner).Magnitude(); |
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maxDist = hsVector3(&vPos, &outer).Magnitude(); |
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minDist *= scale; |
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maxDist *= scale; |
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if( (fFlags & kCullsBefore) |
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&&(maxDist <= fMinDist) ) |
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{ |
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fFlags |= kCulled; |
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return false; |
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} |
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if( (fFlags & kCullsBeyond) |
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&&(minDist > fMaxDist) ) |
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{ |
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fFlags |= kCulled; |
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return false; |
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} |
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if( (fFlags & kIdleBefore) |
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&&(maxDist < fMinIdle) ) |
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fFlags |= kNOP; |
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if( (fFlags & kIdleBeyond) |
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&&(minDist > fMaxIdle) ) |
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fFlags |= kNOP; |
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return true; |
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} |
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void hsSfxDistFade::ProcessPreInterpShadeVerts(hsExpander<hsGShadeVertex*>& vList) |
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{ |
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if( fFlags & (kPostInterp | kNOP) ) |
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return; |
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hsPoint3 vPos; |
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if( GetObjectRef(1) ) |
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{ |
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hsPoint3 wPos; |
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GetObjectRef(1)->GetLocalToWorld().GetTranslate(&wPos); |
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hsMatrix44 w2l = fPipeline->GetWorldToLocal(); |
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vPos = w2l * wPos; |
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} |
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else |
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{ |
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vPos = fPipeline->GetViewPositionLocal(); |
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} |
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hsScalar scale = 1.f / fPipeline->GetLocalScale(); |
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scale *= globalScale; |
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for( vList.First(); vList.More(); vList.Plus() ) |
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{ |
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hsGShadeVertex* shade = vList.Current(); |
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hsScalar dist = hsVector3(&shade->fLocalPos, &vPos).Magnitude(); |
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dist *= scale; |
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hsScalar opac = IOpacFromDist(dist); |
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if( opac > 0 ) |
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shade->fShade.a *= opac; |
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else |
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{ |
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shade->fShade.a = 0; |
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shade->fBaseVertex->fFlags |= hsGVertex3::kCulled; |
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} |
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} |
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} |
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void hsSfxDistFade::ProcessPostInterpShadeVerts(hsExpander<hsGShadeVertex*>& vList) |
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{ |
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if( !(fFlags & kPostInterp) ) |
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return; |
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if( fFlags & kNOP ) |
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return; |
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hsPoint3 vPos; |
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if( GetObjectRef(1) ) |
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{ |
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hsPoint3 wPos; |
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GetObjectRef(1)->GetLocalToWorld().GetTranslate(&wPos); |
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hsMatrix44 w2l = fPipeline->GetWorldToLocal(); |
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vPos = w2l * wPos; |
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} |
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else |
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{ |
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vPos = fPipeline->GetViewPositionLocal(); |
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} |
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hsScalar scale = 1.f / fPipeline->GetLocalScale(); |
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for( vList.First(); vList.More(); vList.Plus() ) |
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{ |
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hsGShadeVertex* shade = vList.Current(); |
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hsScalar dist = hsVector3(&shade->fLocalPos, &vPos).Magnitude(); |
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dist *= scale; |
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hsScalar opac = IOpacFromDist(dist); |
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if( opac > 0 ) |
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shade->fColor.a *= opac; |
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else |
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{ |
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shade->fColor.a = 0; |
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shade->fBaseVertex->fFlags |= hsGVertex3::kCulled; |
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} |
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} |
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} |
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void hsSfxDistFade::MakeTable(float* distList, float* opacList, int num) |
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{ |
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fTable.Reset(); |
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if( !num ) |
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return; |
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int i; |
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for( i = 0; i < num; i++ ) |
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{ |
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hsSfxDfTableEntry* t = fTable.Append(); |
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t->fDistDel = distList[i]; |
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t->fOpacity = opacList[i]; |
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} |
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for( i = num-1; i > 0; i-- ) |
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fTable[i].fDistDel -= fTable[i-1].fDistDel; |
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for( i = 0; i < num-1; i++ ) |
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fTable[i].fDistNorm = hsScalarInvert(fTable[i+1].fDistDel); |
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fTable[num-1].fDistNorm = 0; |
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hsAssert(fTable.GetCount() == num, "Mismatch making table"); |
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if( fTable[0].fOpacity <= 0 ) |
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fFlags |= kCullsBefore; |
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if( fTable[num-1].fOpacity <= 0 ) |
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fFlags |= kCullsBeyond; |
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if( fTable[0].fOpacity >= 1.f ) |
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fFlags |= kIdleBefore; |
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if( fTable[num-1].fOpacity >= 1.f ) |
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fFlags |= kIdleBeyond; |
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int iMin; |
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for( iMin = 0; (iMin < fTable.GetCount())&&(fTable[iMin].fOpacity <= 0); iMin++ ); |
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fMinDist = fTable[0].fDistDel; |
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for( i = 1; i < iMin; i++ ) |
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fMinDist += fTable[i].fDistDel; |
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for( iMin = 0; (iMin < fTable.GetCount())&&(fTable[iMin].fOpacity >= 1.f); iMin++ ); |
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fMinIdle = fTable[0].fDistDel; |
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for( i = 1; i < iMin; i++ ) |
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fMinIdle += fTable[i].fDistDel; |
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int iMax; |
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for( iMax = fTable.GetCount()-1; (iMax >= 0)&&(fTable[iMax].fOpacity <= 0); iMax-- ); |
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if( ++iMax >= fTable.GetCount() ) |
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iMax = fTable.GetCount()-1; |
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fMaxDist = fTable[0].fDistDel; |
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for( i = 1; i <= iMax; i++ ) |
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fMaxDist += fTable[i].fDistDel; |
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for( iMax = fTable.GetCount()-1; (iMax >= 0)&&(fTable[iMax].fOpacity >= 1.f); iMax-- ); |
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if( ++iMax >= fTable.GetCount() ) |
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iMax = fTable.GetCount()-1; |
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fMaxIdle = fTable[0].fDistDel; |
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for( i = 1; i <= iMax; i++ ) |
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fMaxIdle += fTable[i].fDistDel; |
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} |
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void hsSfxDistFade::Read(hsStream* s) |
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{ |
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fTable.Reset(); |
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fMinDist = s->ReadSwapScalar(); |
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fMaxDist = s->ReadSwapScalar(); |
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if( fFlags & (kIdleBefore | kIdleBeyond) ) |
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{ |
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fMinIdle = s->ReadSwapScalar(); |
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fMaxIdle = s->ReadSwapScalar(); |
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} |
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Int32 cnt = s->ReadSwap32(); |
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if( cnt ) |
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{ |
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hsSfxDfTableEntry* arr = new hsSfxDfTableEntry[cnt]; |
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int i; |
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for( i = 0; i < cnt; i++ ) |
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{ |
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arr[i].fDistDel = s->ReadSwapScalar(); |
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arr[i].fDistNorm = s->ReadSwapScalar(); |
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arr[i].fOpacity = s->ReadSwapScalar(); |
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} |
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fTable.SetArray(arr, cnt); |
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} |
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} |
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void hsSfxDistFade::Write(hsStream* s) |
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{ |
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s->WriteSwapScalar(fMinDist); |
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s->WriteSwapScalar(fMaxDist); |
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if( fFlags & (kIdleBefore | kIdleBeyond) ) |
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{ |
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s->WriteSwapScalar(fMinIdle); |
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s->WriteSwapScalar(fMaxIdle); |
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} |
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s->WriteSwap32(fTable.GetCount()); |
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for( fTable.First(); fTable.More(); fTable.Plus() ) |
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{ |
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s->WriteSwapScalar(fTable.Current().fDistDel); |
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s->WriteSwapScalar(fTable.Current().fDistNorm); |
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s->WriteSwapScalar(fTable.Current().fOpacity); |
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} |
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} |
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