nel/src/3d/shadow_skin.cpp

   1 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
   2 // Copyright (C) 2010  Winch Gate Property Limited
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU Affero General Public License as
   6 // published by the Free Software Foundation, either version 3 of the
   7 // License, or (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU Affero General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU Affero General Public License
  15 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 #include "std3d.h"
  18
  19 #include "nel/3d/shadow_skin.h"
  20 #include "nel/3d/skeleton_model.h"
  21 #include "nel/3d/ray_mesh.h"
  22 #include "nel/misc/fast_mem.h"
  23 #include "nel/misc/vector_2f.h"
  24
  25 using namespace NLMISC;
  26 using namespace std;
  27
  28 #ifdef DEBUG_NEW
  29 #define new DEBUG_NEW
  30 #endif
  31
  32 namespace NL3D
  33 {
  34
  35
  36 // ***************************************************************************
  37 // The number of byte to process per block
  38 const   uint    NL_BlockByteL1= 4096;
  39
  40 // Number of vertices per block to process For ShadowMap generation
  41 uint    CShadowSkin::NumCacheVertexShadow= NL_BlockByteL1 / sizeof(CShadowVertex);
  42
  43
  44 // ***************************************************************************
  45 void            CShadowSkin::applySkin(CVector *dst, std::vector<CMatrix3x4> &boneMat3x4)
  46 {
  47         if(Vertices.empty())
  48                 return;
  49         uint    numVerts= (uint)Vertices.size();
  50         CShadowVertex   *src= &Vertices[0];
  51
  52         // Then do the skin
  53         for(;numVerts>0;)
  54         {
  55                 // number of vertices to process for this block.
  56                 uint    nBlockInf= min(NumCacheVertexShadow, numVerts);
  57                 // next block.
  58                 numVerts-= nBlockInf;
  59
  60                 // cache the data in L1 cache.
  61                 CFastMem::precache(src, nBlockInf * sizeof(CShadowVertex));
  62
  63                 //  for all InfluencedVertices only.
  64                 for(;nBlockInf>0;nBlockInf--, src++, dst++)
  65                 {
  66                         boneMat3x4[ src->MatrixId ].mulSetPoint( src->Vertex, *dst );
  67                 }
  68         }
  69 }
  70
  71
  72 // ***************************************************************************
  73 bool    CShadowSkin::getRayIntersection(const CMatrix &toRaySpace, CSkeletonModel &skeleton,
  74                                                            const std::vector<uint32> &matrixInfluences, float &dist2D, float &distZ, bool computeDist2D)
  75 {
  76         // *** render the shadow skin into a temp RAM buffer
  77         // enlarge temp buffer
  78         static std::vector<CVector>     skinInRaySpace;
  79         if(Vertices.size()>skinInRaySpace.size())
  80                 skinInRaySpace.resize(Vertices.size());
  81
  82         // compute matrixes
  83         static  vector<CMatrix3x4>              boneMat3x4;
  84         computeBoneMatrixes3x4PreMul(boneMat3x4, toRaySpace, matrixInfluences, &skeleton);
  85
  86         // apply the skinning
  87         applySkin(&skinInRaySpace[0], boneMat3x4);
  88
  89         // *** return the distance to the ray intersection
  90         return CRayMesh::getRayIntersection(skinInRaySpace, Triangles, dist2D, distZ, computeDist2D);
  91 }
  92
  93
  94
  95 } // NL3D