shader2/Glm/gtc/swizzle.inl

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
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/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
/// furnished to do so, subject to the following conditions:
/// 
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
/// 
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
/// THE SOFTWARE.
///
/// @ref gtc_swizzle
/// @file glm/gtc/swizzle.inl
/// @date 2011-01-15 / 2011-06-15
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////

namespace glm
{
	template <typename T, template <typename> class vecType>
	GLM_FUNC_QUALIFIER T swizzle
	(
		vecType<T> const & v,
		comp x
	)
	{
		assert(int(x) < int(vecType<T>::value_size));
		return v[x];
	}

	template <typename T, template <typename> class vecType>
	GLM_FUNC_QUALIFIER detail::tvec2<T> swizzle
	(
		vecType<T> const & v,
		comp x, comp y
	)
	{
		return detail::tvec2<T>(
			v[x],
			v[y]);
	}

	template <typename T, template <typename> class vecType>
	GLM_FUNC_QUALIFIER detail::tvec3<T> swizzle
	(
		vecType<T> const & v,
		comp x, comp y, comp z
	)
	{
		return detail::tvec3<T>(
			v[x],
			v[y],
			v[z]);
	}

	template <typename T, template <typename> class vecType>
	GLM_FUNC_QUALIFIER detail::tvec4<T> swizzle
	(
		vecType<T> const & v,
		comp x, comp y, comp z, comp w
	)
	{
		return detail::tvec4<T>(v[x], v[y],	v[z], v[w]);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER T& swizzle
	(
		detail::tvec4<T> & v,
		comp x
	)
	{
		return v[x];
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tref2<T> swizzle
	(
		detail::tvec4<T> & v,
		comp x, comp y
	)
	{
		return detail::tref2<T>(v[x], v[y]);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tref3<T> swizzle
	(
		detail::tvec4<T> & v,
		comp x, comp y, comp z
	)
	{
		return detail::tref3<T>(v[x], v[y],	v[z]);
	}

	template <typename T>
	GLM_FUNC_QUALIFIER detail::tref4<T> swizzle
	(
		detail::tvec4<T> & v,
		comp x, comp y, comp z, comp w
	)
	{
		return detail::tref4<T>(v[x], v[y],	v[z], v[w]);
	}
}//namespace glm