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292 lines
7.6 KiB
292 lines
7.6 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 "hsMemory.h" |
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#include "hsSfxDistShade.h" |
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#include "hsStream.h" |
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#include "../plGeometry/hsTriangle3.h" |
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#include "../plIntersect/hsBounds.h" |
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#include "../plDrawable/plDrawable.h" |
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#include "../plPipeline/plPipeline.h" |
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static hsScalar globalScale = 1.f; |
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hsSfxDistShade::hsSfxDistShade() |
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: fMinDist(0), fMaxDist(0) |
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{ |
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} |
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hsSfxDistShade::~hsSfxDistShade() |
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{ |
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} |
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hsScalar hsSfxDistShade::IShadeFromDist(hsScalar dist) |
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{ |
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if( dist <= fTable[0].fDistDel ) |
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return fTable[0].fShade; |
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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].fShade; |
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dist *= fTable[i-1].fDistNorm; |
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hsScalar shade0 = fTable[i-1].fShade; |
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hsScalar shade1 = fTable[i].fShade; |
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return shade0 + dist * (shade1 - shade0); |
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} |
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hsBool32 hsSfxDistShade::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 = pipe->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 = pipe->GetViewPositionLocal(); |
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} |
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hsVector3 vDir = -pipe->GetViewDirLocal(); |
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hsScalar scale = 1.f / fPipeline->GetLocalScale(); |
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scale *= globalScale; |
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hsScalar vD = -(vDir.InnerProduct(vPos)); |
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vD *= scale; |
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const hsBounds3Ext& bnd = obj->GetLocalBounds(); |
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hsPoint3 corner; |
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bnd.GetCorner(&corner); |
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hsVector3 axis[3]; |
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bnd.GetAxes(axis+0, axis+1, axis+2); |
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hsScalar dist = vDir.InnerProduct(corner) + vD; |
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hsScalar minDist = dist; |
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hsScalar maxDist = dist; |
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int i; |
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for( i = 0; i < 3; i++ ) |
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{ |
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dist = vDir.InnerProduct(axis[i]); |
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if( dist < 0 ) |
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minDist += dist; |
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else |
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maxDist += dist; |
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} |
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minDist *= scale; |
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maxDist *= scale; |
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fFlags &= ~kShadeConstant; |
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if( maxDist < fMinDist ) |
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{ |
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fFlags |= kShadeConstant; |
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fConstShade = fTable[0].fShade; |
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} |
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else if( minDist > fMaxDist ) |
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{ |
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fFlags |= kShadeConstant; |
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fConstShade = fTable[fTable.GetCount()-1].fShade; |
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} |
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return true; |
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} |
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void hsSfxDistShade::ProcessPreInterpShadeVerts(hsExpander<hsGShadeVertex*>& vList) |
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{ |
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if( fFlags & kShadeConstant ) |
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{ |
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IConstShadeVerts(vList); |
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} |
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else |
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{ |
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ICalcShadeVerts(vList); |
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} |
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} |
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void hsSfxDistShade::IConstShadeVerts(hsExpander<hsGShadeVertex*>& vList) |
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{ |
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for( vList.First(); vList.More(); vList.Plus() ) |
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{ |
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hsGShadeVertex* svtx = vList.Current(); |
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svtx->fShade.r *= fConstShade; |
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svtx->fShade.g *= fConstShade; |
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svtx->fShade.b *= fConstShade; |
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} |
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} |
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void hsSfxDistShade::ICalcShadeVerts(hsExpander<hsGShadeVertex*>& vList) |
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{ |
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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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hsVector3 vDir = fPipeline->GetViewDirLocal(); |
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hsScalar vDist = vDir.InnerProduct(vPos); |
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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* svtx = vList.Current(); |
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hsScalar dist = -vDir.InnerProduct(svtx->fLocalPos); |
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dist += vDist; |
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dist *= scale; |
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hsScalar shade = IShadeFromDist(dist); |
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if( shade > 0 ) |
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{ |
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svtx->fShade.r *= shade; |
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svtx->fShade.g *= shade; |
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svtx->fShade.b *= shade; |
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} |
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else |
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{ |
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svtx->fShade.r = 0; |
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svtx->fShade.g = 0; |
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svtx->fShade.b = 0; |
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} |
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} |
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} |
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void hsSfxDistShade::MakeTable(float* distList, float* shadeList, 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->fShade = shadeList[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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int iMin; |
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for( iMin = 0; (iMin < fTable.GetCount())&&(fTable[iMin].fShade <= 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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int iMax; |
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for( iMax = fTable.GetCount()-1; (iMax >= 0)&&(fTable[iMax].fShade <= 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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} |
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void hsSfxDistShade::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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Int32 cnt = s->ReadSwap32(); |
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if( cnt ) |
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{ |
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hsSfxDfTableEntry* arr = TRACKED_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].fShade = 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 hsSfxDistShade::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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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().fShade); |
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} |
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} |
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