Method OnTransformChanged

Source/Engine/Foliage/Foliage.cpp:1549–1587

}

void Foliage::OnTransformChanged()
{
    // Base
    Actor::OnTransformChanged();

    PROFILE_CPU();

    // Update instances matrices and cached world bounds
    Vector3 corners[8];
    Matrix world;
    GetLocalToWorldMatrix(world);
    for (auto i = Instances.Begin(); i.IsNotEnd(); ++i)
    {
        auto& instance = *i;
        auto type = &FoliageTypes[instance.Type];

        // Update bounds
        instance.Bounds = BoundingSphere::Empty;
        if (!type->IsReady())
            continue;
        auto& meshes = type->Model->LODs[0].Meshes;
        const Transform transform = _transform.LocalToWorld(instance.Transform);
        for (int32 j = 0; j < meshes.Count(); j++)
        {
            meshes[j].GetBox().GetCorners(corners);

            for (int32 k = 0; k < 8; k++)
            {
                Vector3::Transform(corners[k], transform, corners[k]);
            }
            BoundingSphere meshBounds;
            BoundingSphere::FromPoints(corners, 8, meshBounds);

            BoundingSphere::Merge(instance.Bounds, meshBounds, instance.Bounds);
        }
    }

    RebuildClusters();
}