/// <summary>
/// Configures the data source for a floating point vertex attribute.
/// An exception is thrown if the specified parameters would result in an invalid buffer access.
/// </summary>
/// <param name="vertexAttribute">The vertex attribute information></param>
/// <param name="bufferName">The name of the buffer used for <see cref="AddBuffer{T}(string, T[])"/></param>
/// <param name="offsetInBytes">The offset in bytes for the start of the vertex data in the buffer</param>
/// <param name="strideInBytes">The stride in bytes for the buffer data</param>
/// <exception cref="ArgumentOutOfRangeException">The specified parameters would result in an invalid buffer access.</exception>
public void ConfigureAttribute(VertexAttribute vertexAttribute, string bufferName, int offsetInBytes, int strideInBytes)
{
if (strideInBytes < 0)
{
throw new ArgumentOutOfRangeException(nameof(strideInBytes), invalidAccessMessage);
}
if (!bufferByName.ContainsKey(bufferName))
{
throw new ArgumentException($"The buffer {bufferName} has not been added.", nameof(bufferName));
}
var buffer = bufferByName[bufferName];
var elementSize = AttribPointerUtils.GetSizeInBytes(vertexAttribute.Type) * (int)vertexAttribute.ValueCount;
if (!BufferValidation.IsValidAccess(offsetInBytes, strideInBytes, elementSize, VertexCount, buffer.SizeInBytes))
{
throw new ArgumentOutOfRangeException("", invalidAccessMessage);
}
// Associate attributes with the appropriate buffer, so the buffer can be bound later.
attributesByBuffer[buffer].Add(new VertexAttributeExtended(vertexAttribute, offsetInBytes, strideInBytes));
}
private static void CheckAttribPointerSize(int expected, VertexAttribPointerType type)
{
Assert.AreEqual(expected, AttribPointerUtils.GetSizeInBytes(type));
}
