vector_attribute.h

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#ifndef GEOGRAM_BASIC_VECTOR_ATTRIBUTE
#define GEOGRAM_BASIC_VECTOR_ATTRIBUTE
 
#include <geogram/basic/common.h>
#include <geogram/basic/attributes.h>
#include <geogram/basic/geometry.h>
 
namespace GEO {
 
    template <index_t DIM> class Attribute< vecng<DIM,double> > {
    public:
        typedef vecng<DIM,double> vec_type;
        static constexpr index_t vec_dim = DIM;
 
        Attribute() {
            manager_ = nullptr;
            store_ = nullptr;
        }
 
        ~Attribute() {
            if(is_bound()) {
                unbind();
            }
        }
 
        Attribute(AttributesManager& manager, const std::string& name) {
            manager_ = nullptr;
            store_ = nullptr;
            bind(manager, name);
        }
 
        static bool is_defined(
            AttributesManager& manager, const std::string& name
        ) {
            AttributeStore* store = manager.find_attribute_store(name);
            if(store == nullptr) {
                return false;
            }
            if(store->elements_type_matches(typeid(double).name())) {
                return (store->dimension() == vec_dim);
            }
            if(store->elements_type_matches(typeid(vec_type).name())) {
                return (store->dimension() == 1);
            }
            return false;
        }
 
        void bind(AttributesManager& manager, const std::string& name) {
            geo_assert(!is_bound());
            manager_ = &manager;
            store_ = manager.find_attribute_store(name);
            if(store_ == nullptr) {
                store_ = new TypedAttributeStore<double>(vec_dim);
                manager_->bind_attribute_store(name,store_);
            }
            geo_assert(is_defined(manager, name));
            store_observer_.register_me(store_);
        }
 
        void unbind() {
            geo_assert(is_bound());
            // If the AttributesManager was destroyed before, do not
            // do anything. This can occur in Lua scripting when using
            // Attribute wrapper objects.
            if(!store_observer_.disconnected()) {
                store_observer_.unregister_me(store_);
            }
            manager_ = nullptr;
            store_ = nullptr;
        }
 
        void bind_if_is_defined(
            AttributesManager& manager, const std::string& name
        ) {
            geo_assert(!is_bound());
            if(is_defined(manager, name)) {
                bind(manager, name);
            }
        }
 
        bool is_bound() const {
            return (store_ != nullptr && !store_observer_.disconnected());
        }
 
        index_t size() const {
            return store_observer_.size();
        }
 
        index_t dimension() const {
            return 1;
        }
 
        AttributesManager* manager() {
            return manager_;
        }
 
#ifdef GEO_COMPILER_CLANG
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wcast-align"
#endif
        vec_type& operator[](index_t i) {
            geo_debug_assert(i < size());
            return ((vec_type*)store_observer_.base_addr())[i];
        }
 
        const vec_type& operator[](index_t i) const {
            geo_debug_assert(i < size());
            return ((vec_type*)store_observer_.base_addr())[i];
        }
 
#ifdef GEO_COMPILER_CLANG
#pragma clang diagnostic pop
#endif
 
    private:
        AttributeStoreObserver store_observer_;
        AttributesManager* manager_;
        AttributeStore* store_;
    };
 
}
 
#endif