Method drawSphere

Engine/source/gfx/gfxDrawUtil.cpp:657–712

static SphereMesh gSphere;

void GFXDrawUtil::drawSphere( const GFXStateBlockDesc &desc, F32 radius, const Point3F &pos, const ColorI &color, bool drawTop, bool drawBottom, const MatrixF *xfm )
{
   MatrixF mat;
   if ( xfm )
      mat = *xfm;
   else
      mat = MatrixF::Identity;

   mat.scale(Point3F(radius,radius,radius));
   mat.setPosition(pos);
   GFX->pushWorldMatrix();
   GFX->multWorld(mat);

   const SphereMesh::TriangleMesh * sphereMesh = gSphere.getMesh(2);
   S32 numPoly = sphereMesh->numPoly;
   S32 totalPoly = 0;
   GFXVertexBufferHandle<GFXVertexPCT> verts(mDevice, numPoly*3, GFXBufferTypeVolatile);
   verts.lock();
   S32 vertexIndex = 0;
   for (S32 i=0; i<numPoly; i++)
   {
      if (!drawBottom)
      {
         if (sphereMesh->poly[i].pnt[0].z < -0.01f || sphereMesh->poly[i].pnt[1].z < -0.01f || sphereMesh->poly[i].pnt[2].z < -0.01f)
            continue;
      }
      if (!drawTop)
      {
         if (sphereMesh->poly[i].pnt[0].z > 0.01f || sphereMesh->poly[i].pnt[1].z > 0.01f || sphereMesh->poly[i].pnt[2].z > 0.01f)
            continue;
      }
      totalPoly++;

      verts[vertexIndex].point = sphereMesh->poly[i].pnt[0];
      verts[vertexIndex].color = color;
      vertexIndex++;

      verts[vertexIndex].point = sphereMesh->poly[i].pnt[1];
      verts[vertexIndex].color = color;
      vertexIndex++;

      verts[vertexIndex].point = sphereMesh->poly[i].pnt[2];
      verts[vertexIndex].color = color;
      vertexIndex++;
   }
   verts.unlock();

   mDevice->setStateBlockByDesc( desc );

   mDevice->setVertexBuffer( verts );
   mDevice->setupGenericShaders();

   mDevice->drawPrimitive( GFXTriangleList, 0, totalPoly );

   GFX->popWorldMatrix();
}

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