/// <summary>
/// 複数の頂点要素を合成する
/// </summary>
/// <param name="graphicsDevice">頂点宣言を生成する為のGraphicsDevice</param>
/// <param name="originalElements">元の頂点要素</param>
/// <param name="extraElements">追加する頂点要素</param>
/// <returns>新要素追加後の頂点宣言</returns>
public static VertexDeclaration ExtendVertexDeclaration(
GraphicsDevice graphicsDevice,
VertexElement[] originalElements,
VertexElement[] extraElements)
{
int length = originalElements.Length + extraElements.Length;
VertexElement[] elements = new VertexElement[length];
originalElements.CopyTo( elements, 0 );
extraElements.CopyTo( elements, originalElements.Length );
return new VertexDeclaration( graphicsDevice, elements );
}
/// <summary>
/// Modifies vertex declaration to include additional channels
/// </summary>
/// <param name="extraElements"></param>
void ExtendVertexDeclaration(VertexElement[] extraElements)
{
vertexDeclaration.Dispose();
int length = originalVertexDeclaration.Length + extraElements.Length;
VertexElement[] elements = new VertexElement[length];
originalVertexDeclaration.CopyTo(elements, 0);
extraElements.CopyTo(elements, originalVertexDeclaration.Length);
// Create
vertexDeclaration = new VertexDeclaration(device, elements);
}
