Method createTriMesh

Engine/source/ts/tsMeshFit.cpp:323–389

}

TSMesh* MeshFit::createTriMesh( F32* verts, S32 numVerts, U32* indices, S32 numTris ) const
{
   TSMesh* mesh = mShape->copyMesh( NULL );
   mesh->numFrames = 1;
   mesh->numMatFrames = 1;
   mesh->vertsPerFrame = numVerts;
   mesh->setFlags(0);
   mesh->mNumVerts = numVerts;

   mesh->mIndices.reserve( numTris * 3 );
   for ( S32 i = 0; i < numTris; i++ )
   {
      mesh->mIndices.push_back( indices[i*3 + 0] );
      mesh->mIndices.push_back( indices[i*3 + 2] );
      mesh->mIndices.push_back( indices[i*3 + 1] );
   }

   mesh->mVerts.set( verts, numVerts );

   // Compute mesh normals
   mesh->mNorms.setSize( mesh->mVerts.size() );
   for (S32 iNorm = 0; iNorm < mesh->mNorms.size(); iNorm++)
      mesh->mNorms[iNorm] = Point3F::Zero;

   // Sum triangle normals for each vertex
   for (S32 iInd = 0; iInd < mesh->mIndices.size(); iInd += 3)
   {
      // Compute the normal for this triangle
      S32 idx0 = mesh->mIndices[iInd + 0];
      S32 idx1 = mesh->mIndices[iInd + 1];
      S32 idx2 = mesh->mIndices[iInd + 2];

      const Point3F& v0 = mesh->mVerts[idx0];
      const Point3F& v1 = mesh->mVerts[idx1];
      const Point3F& v2 = mesh->mVerts[idx2];

      Point3F n;
      mCross(v2 - v0, v1 - v0, &n);
      n.normalize();    // remove this to use 'weighted' normals (large triangles will have more effect)

      mesh->mNorms[idx0] += n;
      mesh->mNorms[idx1] += n;
      mesh->mNorms[idx2] += n;
   }

   // Normalize the vertex normals (this takes care of averaging the triangle normals)
   for (S32 iNorm = 0; iNorm < mesh->mNorms.size(); iNorm++)
      mesh->mNorms[iNorm].normalize();

   // Set some dummy UVs
   mesh->mTverts.setSize( numVerts );
   for ( S32 j = 0; j < mesh->mTverts.size(); j++ )
      mesh->mTverts[j].set( 0, 0 );

   // Add a single triangle-list primitive
   mesh->mPrimitives.increment();
   mesh->mPrimitives.last().start = 0;
   mesh->mPrimitives.last().numElements = mesh->mIndices.size();