C++ (Cpp) Drawable::ProcessRayQuery示例

void Octant::GetDrawablesInternal(RayOctreeQuery& query) const
{
    float octantDist = query.ray_.HitDistance(cullingBox_);
    if (octantDist >= query.maxDistance_)
        return;

    if (drawables_.Size())
    {
        Drawable** start = const_cast<Drawable**>(&drawables_[0]);
        Drawable** end = start + drawables_.Size();

        while (start != end)
        {
            Drawable* drawable = *start++;

            if ((drawable->GetDrawableFlags() & query.drawableFlags_) && (drawable->GetViewMask() & query.viewMask_))
                drawable->ProcessRayQuery(query, query.result_);
        }
    }

    for (unsigned i = 0; i < NUM_OCTANTS; ++i)
    {
        if (children_[i])
            children_[i]->GetDrawablesInternal(query);
    }
}

示例#2

显示文件

文件： Octree.cpp 项目： julyfortoday/Urho3D

void Octree::RaycastSingle(RayOctreeQuery& query) const
{
    PROFILE(Raycast);

    query.result_.Clear();
    rayQueryDrawables_.Clear();
    GetDrawablesOnlyInternal(query, rayQueryDrawables_);

    // Sort by increasing hit distance to AABB
    for (PODVector<Drawable*>::Iterator i = rayQueryDrawables_.Begin(); i != rayQueryDrawables_.End(); ++i)
    {
        Drawable* drawable = *i;
        drawable->SetSortValue(query.ray_.HitDistance(drawable->GetWorldBoundingBox()));
    }

    Sort(rayQueryDrawables_.Begin(), rayQueryDrawables_.End(), CompareDrawables);

    // Then do the actual test according to the query, and early-out as possible
    float closestHit = M_INFINITY;
    for (PODVector<Drawable*>::Iterator i = rayQueryDrawables_.Begin(); i != rayQueryDrawables_.End(); ++i)
    {
        Drawable* drawable = *i;
        if (drawable->GetSortValue() < Min(closestHit, query.maxDistance_))
        {
            unsigned oldSize = query.result_.Size();
            drawable->ProcessRayQuery(query, query.result_);
            if (query.result_.Size() > oldSize)
                closestHit = Min(closestHit, query.result_.Back().distance_);
        }
        else
            break;
    }

    if (query.result_.Size() > 1)
    {
        Sort(query.result_.Begin(), query.result_.End(), CompareRayQueryResults);
        query.result_.Resize(1);
    }
}