half.h

//
// Copyright 2016 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#ifndef GF_HALF_H
#define GF_HALF_H

/// \file gf/half.h
///
/// This header serves to simply bring in the half float datatype and
/// provide a hash_value function.  For documentation, of the half type,
/// please see the half header in ilmbase_half.h.

#include "pxr/pxr.h"
#include "pxr/base/gf/ilmbase_half.h"
#include "pxr/base/gf/ilmbase_halfLimits.h"

#include <type_traits>

PXR_NAMESPACE_OPEN_SCOPE

/// A 16-bit floating point data type.
using GfHalf = pxr_half::half;

namespace pxr_half {
    /// Overload hash_value for half.
    template<typename Half>
    inline
    typename std::enable_if<std::is_same<Half, half>::value, size_t>::type
    hash_value(const Half& h) { return h.bits(); }
}

/// Returns the dot (inner) product of two vectors.
/// For scalar types, this is just the regular product.
/// \ingroup group_gf_BasicMath
inline GfHalf GfDot(GfHalf a, GfHalf b) {
    return a * b;
}

PXR_NAMESPACE_CLOSE_SCOPE


#endif // GF_HALF_H