/// <summary>
/// <para>Specifies a variation buffer for a GPU Instancer prototype that is defined in the prefab's shader. Required to use <see cref="AddVariation{T}"/></para>
/// <prara>Use this if you want any type of variation between this prototype's instances.</prara>
/// <para>To define the buffer necessary for this variation in your shader, you need to create a StructuredBuffer field of the relevant type in that shader.
/// You can then access this buffer with "gpuiTransformationMatrix[unity_InstanceID]"</para>
/// <para>see <seealso cref="ColorVariations"/> and its demo scene for an example</para>
/// </summary>
///
/// <example>
/// This sample shows how to use the variation buffer in your shader:
///
/// <code><![CDATA[
/// ...
/// fixed4 _Color;
///
/// #ifdef UNITY_PROCEDURAL_INSTANCING_ENABLED
/// StructuredBuffer<float4> colorBuffer;
/// #endif
/// ...
/// void surf (Input IN, inout SurfaceOutputStandard o) {
/// ...
/// #ifdef UNITY_PROCEDURAL_INSTANCING_ENABLED
/// uint index = gpuiTransformationMatrix[unity_InstanceID];
/// col = colorBuffer[index];
/// #else
/// col = _Color;
/// #endif
/// ...
/// }
/// ]]></code>
///
/// See "GPUInstancer/ColorVariationShader" for the full example.
///
/// </example>
///
/// <typeparam name="T">The type of variation buffer. Must be defined in the instance prototype's shader</typeparam>
/// <param name="manager">The manager that defines the prototypes you want to GPU instance.</param>
/// <param name="prototype">The GPU Instancer prototype to define variations.</param>
/// <param name="bufferName">The name of the variation buffer in the prototype's shader.</param>
public static void DefinePrototypeVariationBuffer <T>(GPUInstancerPrefabManager manager, GPUInstancerPrefabPrototype prototype, string bufferName)
{
manager.DefinePrototypeVariationBuffer <T>(prototype, bufferName);
}
