void BVH4BuilderTopLevel::task_build_parallel(size_t threadIndex, size_t threadCount,
size_t taskIndex, size_t taskCount,
TaskScheduler::Event* event_i)
{
/* ignore meshes that need all threads */
size_t objectID = taskIndex;
if (builders[objectID] && builders[objectID]->needAllThreads)
return;
/* build all other meshes */
BBox3f bounds = build(threadIndex,threadCount,objectID);
if (!bounds.empty())
g_state->thread_bounds[threadIndex].extend(bounds);
}
float BVH4i::sah (NodeRef& node, const BBox3f& bounds)
{
float f = bounds.empty() ? 0.0f : area(bounds);
if (node.isNode())
{
Node* n = node.node(nodePtr());
for (size_t c=0; c<4; c++)
f += sah(n->child(c),n->bounds(c));
return f;
}
else
{
size_t num; node.leaf(triPtr(),num);
return f*num;
}
}
