Method renderDebugNormals

Engine/source/ts/tsShapeInstance.cpp:331–393

//-------------------------------------------------------------------------------------

void TSShapeInstance::renderDebugNormals( F32 normalScalar, S32 dl )
{
   if ( dl < 0 )
      return;

   AssertFatal( dl >= 0 && dl < mShape->details.size(),
      "TSShapeInstance::renderDebugNormals() - Bad detail level!" );

   static GFXStateBlockRef sb;
   if ( sb.isNull() )
   {
      GFXStateBlockDesc desc;
      desc.setCullMode( GFXCullNone );
      desc.setZReadWrite( true );
      desc.zWriteEnable = false;
      desc.vertexColorEnable = true;

      sb = GFX->createStateBlock( desc );
   }
   GFX->setStateBlock( sb );

   const TSDetail *detail = &mShape->details[dl];
   const S32 ss = detail->subShapeNum;
   if ( ss < 0 )
      return;

   const S32 start = mShape->subShapeFirstObject[ss];
   const S32 end   = start + mShape->subShapeNumObjects[ss];

   for ( S32 i = start; i < end; i++ )
   {
      MeshObjectInstance *meshObj = &mMeshObjects[i];
      if ( !meshObj )
         continue;

      const MatrixF &meshMat = meshObj->getTransform();

      // Then go through each TSMesh...
      U32 m = 0;
      for( TSMesh *mesh = meshObj->getMesh(m); mesh != NULL; mesh = meshObj->getMesh(m++) )
      {
         // and pull out the list of normals.
         const U32 numNrms = mesh->mNumVerts;
         PrimBuild::begin( GFXLineList, 2 * numNrms );
         for ( U32 n = 0; n < numNrms; n++ )
         {
            const TSMesh::__TSMeshVertexBase &v = mesh->mVertexData.getBase(n);
            Point3F norm = v.normal();
            Point3F vert = v.vert();

            meshMat.mulP( vert );
            meshMat.mulV( norm );

            // Then render them.
            PrimBuild::color4f( mFabs( norm.x ), mFabs( norm.y ), mFabs( norm.z ), 1.0f );
            PrimBuild::vertex3fv( vert );
            PrimBuild::vertex3fv( vert + (norm * normalScalar) );
         }