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248 lines
7.5 KiB
248 lines
7.5 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 "plInterMeshSmooth.h" |
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#include "plDrawableSpans.h" |
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class EdgeBin |
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{ |
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public: |
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UInt16 fVtx; |
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UInt16 fCount; |
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EdgeBin() : fVtx(0), fCount(0) {} |
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}; |
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void plInterMeshSmooth::FindEdges(UInt32 maxVtxIdx, UInt32 nTris, UInt16* idxList, hsTArray<UInt16>& edgeVerts) |
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{ |
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hsTArray<EdgeBin>* bins = TRACKED_NEW hsTArray<EdgeBin>[maxVtxIdx+1]; |
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hsBitVector edgeVertBits; |
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// For each vert pair (edge) in idxList |
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int i; |
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for( i = 0; i < nTris; i++ ) |
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{ |
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int j; |
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for( j = 0; j < 3; j++ ) |
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{ |
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int jPlus = j < 2 ? j+1 : 0; |
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int idx0 = idxList[i*3 + j]; |
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int idx1 = idxList[i*3 + jPlus]; |
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int lo, hi; |
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// Look in the LUT for the lower index. |
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if( idx0 < idx1 ) |
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{ |
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lo = idx0; |
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hi = idx1; |
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} |
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else |
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{ |
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lo = idx1; |
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hi = idx0; |
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} |
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hsTArray<EdgeBin>& loBin = bins[lo]; |
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// In that bucket, look for the higher index. |
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int k; |
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for( k = 0; k < loBin.GetCount(); k++ ) |
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{ |
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if( loBin[k].fVtx == hi ) |
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break; |
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} |
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// If we find it, increment it's count, |
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// else add it. |
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if( k < loBin.GetCount() ) |
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{ |
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loBin[k].fCount++; |
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} |
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else |
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{ |
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EdgeBin* b = loBin.Push(); |
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b->fVtx = hi; |
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b->fCount = 1; |
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} |
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} |
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} |
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// For each bucket in the LUT, |
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for( i = 0; i < maxVtxIdx+1; i++ ) |
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{ |
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hsTArray<EdgeBin>& loBin = bins[i]; |
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// For each higher index |
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int j; |
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for( j = 0; j < loBin.GetCount(); j++ ) |
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{ |
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// If the count is one, it's an edge, so set the edge bit for both indices (hi and lo) |
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if( 1 == loBin[j].fCount ) |
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{ |
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edgeVertBits.SetBit(i); |
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edgeVertBits.SetBit(loBin[j].fVtx); |
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} |
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} |
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} |
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// Now translate the bitvector to a list of indices. |
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for( i = 0; i < maxVtxIdx+1; i++ ) |
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{ |
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if( edgeVertBits.IsBitSet(i) ) |
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edgeVerts.Append(i); |
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} |
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delete [] bins; |
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} |
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void plInterMeshSmooth::FindEdges(hsTArray<plSpanHandle>& sets, hsTArray<UInt16>* edgeVerts) |
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{ |
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int i; |
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for( i = 0; i < sets.GetCount(); i++ ) |
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{ |
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const plSpan* span = sets[i].fDrawable->GetSpan(sets[i].fSpanIdx); |
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if( !(span->fTypeMask & plSpan::kIcicleSpan) ) |
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continue; |
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UInt32 nTris = sets[i].fDrawable->CvtGetNumTris(sets[i].fSpanIdx); |
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UInt16* idxList = sets[i].fDrawable->CvtGetIndexList(sets[i].fSpanIdx); |
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UInt32 maxVertIdx = sets[i].fDrawable->CvtGetNumVerts(sets[i].fSpanIdx)-1; |
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FindEdges(maxVertIdx, nTris, idxList, edgeVerts[i]); |
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} |
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} |
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void plInterMeshSmooth::SmoothNormals(hsTArray<plSpanHandle>& sets) |
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{ |
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hsTArray<UInt16>* shareVtx = TRACKED_NEW hsTArray<UInt16>[sets.GetCount()]; |
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hsTArray<UInt16>* edgeVerts = TRACKED_NEW hsTArray<UInt16>[sets.GetCount()]; |
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FindEdges(sets, edgeVerts); |
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int i; |
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for( i = 0; i < sets.GetCount()-1; i++ ) |
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{ |
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int j; |
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for( j = edgeVerts[i].GetCount()-1; j >= 0; --j ) |
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{ |
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hsPoint3 pos = GetPosition(sets[i], edgeVerts[i][j]); |
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hsVector3 normAccum = GetNormal(sets[i], edgeVerts[i][j]);; |
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shareVtx[i].Append(edgeVerts[i][j]); |
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int k; |
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for( k = i+1; k < sets.GetCount(); k++ ) |
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{ |
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FindSharedVerts(pos, sets[k], edgeVerts[k], shareVtx[k], normAccum); |
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} |
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normAccum.Normalize(); |
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GetNormal(sets[i], edgeVerts[i][j]) = normAccum; |
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for( k = i+1; k < sets.GetCount(); k++ ) |
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{ |
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SetNormals(sets[k], shareVtx[k], normAccum); |
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} |
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// Now remove all the shared verts (which we just processed) |
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// from edgeVerts so we don't process them again. |
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for( k = i; k < sets.GetCount(); k++ ) |
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{ |
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int m; |
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for( m = 0; m < shareVtx[k].GetCount(); m++ ) |
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{ |
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int idx = edgeVerts[k].Find(shareVtx[k][m]); |
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hsAssert(idx != edgeVerts[k].kMissingIndex, "Lost vertex between find and remove"); |
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edgeVerts[k].Remove(idx); |
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} |
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shareVtx[k].SetCount(0); |
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} |
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} |
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} |
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delete [] shareVtx; |
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delete [] edgeVerts; |
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} |
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void plInterMeshSmooth::FindSharedVerts(hsPoint3& searchPos, plSpanHandle& set, hsTArray<UInt16>& edgeVerts, hsTArray<UInt16>& shareVtx, hsVector3& normAccum) |
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{ |
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int i; |
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for( i = 0; i < edgeVerts.GetCount(); i++ ) |
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{ |
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hsPoint3 pos = GetPosition(set, edgeVerts[i]); |
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hsVector3 norm = GetNormal(set, edgeVerts[i]); |
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if( searchPos == pos ) |
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{ |
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if( norm.InnerProduct(normAccum) > fMinNormDot ) |
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{ |
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shareVtx.Append(edgeVerts[i]); |
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normAccum += norm; |
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} |
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} |
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} |
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} |
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void plInterMeshSmooth::SetNormals(plSpanHandle& set, hsTArray<UInt16>& shareVtx, hsVector3& norm) |
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{ |
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int i; |
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for( i = 0; i < shareVtx.GetCount(); i++ ) |
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GetNormal(set, shareVtx[i]) = norm; |
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} |
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hsPoint3& plInterMeshSmooth::GetPosition(plSpanHandle& set, UInt16 idx) |
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{ |
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return set.fDrawable->CvtGetPosition(set.fSpanIdx, idx); |
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} |
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hsVector3& plInterMeshSmooth::GetNormal(plSpanHandle& set, UInt16 idx) |
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{ |
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return set.fDrawable->CvtGetNormal(set.fSpanIdx, idx); |
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} |
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void plInterMeshSmooth::SetAngle(hsScalar degs) |
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{ |
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fMinNormDot = hsCosine(hsScalarDegToRad(degs)); |
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} |
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hsScalar plInterMeshSmooth::GetAngle() const |
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{ |
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return hsScalarRadToDeg(hsACosine(fMinNormDot)); |
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} |