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318 lines
7.4 KiB
318 lines
7.4 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 "memory.h" |
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#include "hsTypes.h" |
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#include "plGeoSpanDice.h" |
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#include "plGeometrySpan.h" |
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plGeoSpanDice::plGeoSpanDice() |
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: fMinFaces(0), |
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fMaxFaces(0) |
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{ |
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fMaxSize.Set(0,0,0); |
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} |
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plGeoSpanDice::~plGeoSpanDice() |
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{ |
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} |
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hsBool plGeoSpanDice::Dice(hsTArray<plGeometrySpan*>& spans) const |
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{ |
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int startingCount = spans.GetCount(); |
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hsTArray<plGeometrySpan*> out; |
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hsTArray<plGeometrySpan*> next; |
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while(spans.GetCount()) |
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{ |
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int i; |
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for( i = 0; i < spans.GetCount(); i++ ) |
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{ |
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if( !IHalf(spans[i], next) ) |
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{ |
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out.Append(spans[i]); |
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} |
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} |
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spans.Swap(next); |
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next.SetCount(0); |
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} |
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spans.Swap(out); |
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return spans.GetCount() != startingCount; |
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} |
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hsBool plGeoSpanDice::INeedSplitting(plGeometrySpan* src) const |
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{ |
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// Do we have enough faces to bother? |
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if( fMinFaces ) |
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{ |
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if( src->fNumIndices < fMinFaces * 3 ) |
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return false; |
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} |
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// Do we have enough faces to bother no matter how small we are? |
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if( fMaxFaces ) |
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{ |
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if( src->fNumIndices > fMaxFaces * 3 ) |
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return true; |
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} |
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// Are we big enough to bother? |
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if( (fMaxSize.fX > 0) || (fMaxSize.fY > 0) || (fMaxSize.fZ > 0) ) |
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{ |
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hsPoint3 size = src->fLocalBounds.GetMaxs() - src->fLocalBounds.GetMins(); |
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if( size.fX > fMaxSize.fX ) |
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return true; |
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if( size.fY > fMaxSize.fY ) |
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return true; |
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if( size.fZ > fMaxSize.fZ ) |
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return true; |
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} |
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return false; |
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} |
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hsBool plGeoSpanDice::IHalf(plGeometrySpan* src, hsTArray<plGeometrySpan*>& out, int exclAxis) const |
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{ |
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if( !INeedSplitting(src) ) |
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return false; |
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int iAxis = ISelectAxis(exclAxis, src); |
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// Ran out of axes to try. |
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if( iAxis < 0 ) |
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return false; |
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hsScalar midPoint = src->fLocalBounds.GetCenter()[iAxis]; |
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hsTArray<UInt32> loTris; |
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hsTArray<UInt32> hiTris; |
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UInt16* indexData = src->fIndexData; |
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int numTris = src->fNumIndices / 3; |
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int stride = src->GetVertexSize(src->fFormat); |
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int i; |
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for( i = 0; i < numTris; i++ ) |
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{ |
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hsPoint3& pos0 = *(hsPoint3*)(src->fVertexData + *indexData++ * stride); |
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hsPoint3& pos1 = *(hsPoint3*)(src->fVertexData + *indexData++ * stride); |
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hsPoint3& pos2 = *(hsPoint3*)(src->fVertexData + *indexData++ * stride); |
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if( (pos0[iAxis] >= midPoint) |
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&&(pos1[iAxis] >= midPoint) |
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&&(pos2[iAxis] >= midPoint) ) |
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{ |
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hiTris.Append(i); |
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} |
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else |
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{ |
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loTris.Append(i); |
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} |
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} |
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// This axis isn't working out, try another. |
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if( !hiTris.GetCount() || !loTris.GetCount() ) |
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return IHalf(src, out, exclAxis | (1 << iAxis)); |
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plGeometrySpan* loDst = IExtractTris(src, loTris); |
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plGeometrySpan* hiDst = IExtractTris(src, hiTris); |
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delete src; |
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out.Append(loDst); |
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out.Append(hiDst); |
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return true; |
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} |
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int plGeoSpanDice::ISelectAxis(int exclAxis, plGeometrySpan* src) const |
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{ |
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int iAxis = -1; |
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hsScalar maxDim = 0; |
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int i; |
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for( i = 0; i < 3; i++ ) |
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{ |
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// Check to see if we've already tried this one. |
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if( exclAxis & (1 << i) ) |
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continue; |
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hsScalar dim = src->fLocalBounds.GetMaxs()[i] - src->fLocalBounds.GetMins()[i]; |
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if( dim > maxDim ) |
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{ |
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maxDim = dim; |
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iAxis = i; |
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} |
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} |
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return iAxis; |
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} |
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plGeometrySpan* plGeoSpanDice::IExtractTris(plGeometrySpan* src, hsTArray<UInt32>& tris) const |
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{ |
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// First off, find out how many and which vers we're talking here. |
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// Easiest way is while we're building the LUTs we'll want later anyway. |
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hsTArray<Int16> fwdLUT; |
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fwdLUT.SetCount(src->fNumVerts); |
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memset(fwdLUT.AcquireArray(), -1, src->fNumVerts * sizeof(*fwdLUT.AcquireArray())); |
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hsTArray<UInt16> bckLUT; |
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bckLUT.SetCount(0); |
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int i; |
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for( i = 0; i < tris.GetCount(); i++ ) |
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{ |
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UInt16* idx = src->fIndexData + tris[i] * 3; |
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if( fwdLUT[*idx] < 0 ) |
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{ |
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fwdLUT[*idx] = bckLUT.GetCount(); |
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bckLUT.Append(*idx); |
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} |
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idx++; |
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if( fwdLUT[*idx] < 0 ) |
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{ |
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fwdLUT[*idx] = bckLUT.GetCount(); |
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bckLUT.Append(*idx); |
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} |
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idx++; |
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if( fwdLUT[*idx] < 0 ) |
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{ |
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fwdLUT[*idx] = bckLUT.GetCount(); |
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bckLUT.Append(*idx); |
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} |
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} |
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int numVerts = bckLUT.GetCount(); |
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int numTris = tris.GetCount(); |
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plGeometrySpan* dst = IAllocSpace(src, numVerts, numTris); |
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// Okay, set the index data. |
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UInt16* idxTrav = dst->fIndexData; |
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for( i = 0; i < tris.GetCount(); i++ ) |
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{ |
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*idxTrav++ = fwdLUT[src->fIndexData[ tris[i] * 3 + 0] ]; |
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*idxTrav++ = fwdLUT[src->fIndexData[ tris[i] * 3 + 1] ]; |
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*idxTrav++ = fwdLUT[src->fIndexData[ tris[i] * 3 + 2] ]; |
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} |
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// Copy over the basic vertex data |
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// We'll update the bounds as we go. |
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int stride = src->GetVertexSize(src->fFormat); |
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hsBounds3Ext localBnd; |
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localBnd.MakeEmpty(); |
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UInt8* vtxTrav = dst->fVertexData; |
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for( i = 0; i < numVerts; i++ ) |
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{ |
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memcpy(vtxTrav, src->fVertexData + bckLUT[i] * stride, stride); |
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hsPoint3* pos = (hsPoint3*)vtxTrav; |
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localBnd.Union(pos); |
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vtxTrav += stride; |
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} |
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if( src->fProps & plGeometrySpan::kWaterHeight ) |
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{ |
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src->AdjustBounds(localBnd); |
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} |
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dst->fLocalBounds = localBnd; |
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// Now the rest of this optional garbage. |
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if( src->fMultColor ) |
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{ |
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for( i = 0; i < numVerts; i++ ) |
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{ |
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dst->fMultColor[i] = src->fMultColor[bckLUT[i]]; |
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} |
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} |
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if( src->fAddColor ) |
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{ |
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for( i = 0; i < numVerts; i++ ) |
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{ |
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dst->fAddColor[i] = src->fAddColor[bckLUT[i]]; |
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} |
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} |
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if( src->fDiffuseRGBA ) |
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{ |
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for( i = 0; i < numVerts; i++ ) |
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{ |
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dst->fDiffuseRGBA[i] = src->fDiffuseRGBA[bckLUT[i]]; |
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} |
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} |
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if( src->fSpecularRGBA ) |
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{ |
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for( i = 0; i < numVerts; i++ ) |
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{ |
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dst->fSpecularRGBA[i] = src->fSpecularRGBA[bckLUT[i]]; |
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} |
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} |
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dst->fMaxOwner = src->fMaxOwner; |
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return dst; |
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} |
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plGeometrySpan* plGeoSpanDice::IAllocSpace(plGeometrySpan* src, int numVerts, int numTris) const |
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{ |
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plGeometrySpan* dst = TRACKED_NEW plGeometrySpan; |
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// Do a structure copy here. That's okay, because we're going to immediately |
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// fix up the pointers and counters that shouldn't have been copied. If |
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// plGeometrySpan ever gets a copy constructor, this'll blow wide open. |
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*dst = *src; |
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int stride = src->GetVertexSize(src->fFormat); |
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dst->fNumIndices = numTris * 3; |
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dst->fIndexData = TRACKED_NEW UInt16[dst->fNumIndices]; |
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dst->fNumVerts = numVerts; |
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dst->fVertexData = TRACKED_NEW UInt8[numVerts * stride]; |
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if( src->fMultColor ) |
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{ |
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dst->fMultColor = TRACKED_NEW hsColorRGBA[numVerts]; |
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} |
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if( src->fAddColor ) |
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{ |
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dst->fAddColor = TRACKED_NEW hsColorRGBA[numVerts]; |
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} |
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if( src->fDiffuseRGBA ) |
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{ |
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dst->fDiffuseRGBA = TRACKED_NEW UInt32[numVerts]; |
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} |
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if( src->fSpecularRGBA ) |
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{ |
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dst->fSpecularRGBA = TRACKED_NEW UInt32[numVerts]; |
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} |
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return dst; |
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} |