/// <summary>
/// Copy this array buffer object to another one, but having a different array item type.
/// </summary>
/// <param name="vertexArrayType">
/// A <see cref="ArrayBufferItemType"/> that specify the returned <see cref="ArrayBufferObject"/> item type.
/// </param>
/// <returns>
/// It returns a copy of this ArrayBufferObject, but having a different array item. The returned instance is actually
/// a <see cref="ArrayBufferObject"/>.
/// </returns>
/// <exception cref="ArgumentException">
/// Exception thrown if the array base type of this ArrayBufferObject (<see cref="ArrayBaseType"/>) is different to the one
/// derived from <paramref name="vertexArrayType"/>.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Exception thrown if the number of base components of this ArrayBufferObject cannot be mapped into the base components
/// count derived from <paramref name="vertexArrayType"/>.
/// </exception>
public ArrayBufferObject ConvertItemType(ArrayBufferItemType vertexArrayType)
{
if (ArrayBufferItem.GetArrayBaseType(_ArrayType) != ArrayBufferItem.GetArrayBaseType(vertexArrayType))
{
throw new ArgumentException("base type mismatch", "vertexArrayType");
}
uint componentsCount = ItemCount * ArrayBufferItem.GetArrayLength(ArrayType) * ArrayBufferItem.GetArrayRank(ArrayType);
uint convComponentsCount = ArrayBufferItem.GetArrayLength(vertexArrayType) * ArrayBufferItem.GetArrayRank(vertexArrayType);
Debug.Assert(componentsCount >= convComponentsCount);
if ((componentsCount % convComponentsCount) != 0)
{
throw new InvalidOperationException("components length incompatibility");
}
ArrayBufferObject arrayObject = CreateArrayObject(vertexArrayType, Hint);
// Different item count due different lengths
arrayObject.Create(componentsCount / convComponentsCount);
// Memory is copied
Memory.MemoryCopy(arrayObject.ClientBufferAddress, ClientBufferAddress, ClientBufferSize);
return(arrayObject);
}
private void DrawLines2f_GL_3_2(Vertex2f[] vertices)
{
// Define geometry buffer
_DrawArrayBuffer.Create(this, vertices);
// Define geometry arrays
_VertexArray.SetArray(_DrawArrayBuffer, VertexArraySemantic.Position);
// Draw arrays
_VertexArray.Draw(this, null);
}