public void WriteAttribDescriptions(Span <VertexAttribDescription> descriptions)
{
descriptions[0] = new VertexAttribDescription(AttributeType.FloatVec3);
descriptions[1] = new VertexAttribDescription(AttributeType.FloatVec3);
descriptions[2] = new VertexAttribDescription(AttributeType.FloatVec4, true, AttributeBaseType.UnsignedByte);
descriptions[3] = new VertexAttribDescription(AttributeType.FloatVec2);
}
/// <summary>
/// Creates a <see cref="VertexAttribSource"/> that represents padding. This means that the created
/// <see cref="VertexAttribSource"/> will not indicate a buffer to read data from or use a vertex
/// attribute index, it will just leave an ignored space between other attributes.
/// </summary>
/// <param name="bufferSubset">The <see cref="BufferObjectSubset"/> where the padding will be added.</param>
/// <param name="paddingBytes">The amount of space to leave empty, measured in bytes.</param>
public VertexAttribSource(DataBufferSubset bufferSubset, uint paddingBytes)
{
if (bufferSubset == null)
{
throw new ArgumentNullException(nameof(bufferSubset));
}
if (bufferSubset.BufferTarget != BufferTargetARB.ArrayBuffer)
{
throw new ArgumentException("The specified BufferObjectSubset must be usable as vertex attrib data. Try using a VertexDataBufferSubset", nameof(bufferSubset));
}
BufferSubset = bufferSubset;
AttribDescription = new VertexAttribDescription(paddingBytes);
}
/// <summary>
/// Creates a <see cref="VertexAttribSource"/> with a given <see cref="BufferObjectSubset"/>
/// and the given <see cref="VertexAttribDescription"/>.
/// </summary>
/// <param name="bufferSubset">The <see cref="BufferObjectSubset"/> where the vertex attrib data is located. Must be a subset usable for vertex data.</param>
/// <param name="attribDesc">The <see cref="VertexAttribDescription"/> describing the vertex attribute.</param>
public VertexAttribSource(DataBufferSubset bufferSubset, VertexAttribDescription attribDesc)
{
if (bufferSubset == null)
{
throw new ArgumentNullException(nameof(bufferSubset));
}
if (bufferSubset.BufferTarget != BufferTarget.ArrayBuffer)
{
throw new ArgumentException("The specified " + nameof(BufferObjectSubset) + " must be usable as vertex attrib data. Try using a VertexDataBufferSubset", nameof(bufferSubset));
}
BufferSubset = bufferSubset;
AttribDescription = attribDesc;
}
public void WriteAttribDescriptions(Span <VertexAttribDescription> descriptions)
{
descriptions[0] = new VertexAttribDescription(AttributeType.FloatVec3);
descriptions[1] = new VertexAttribDescription(AttributeType.FloatVec3);
}
/// <summary>
/// Creates a <see cref="VertexAttribSource"/> that specifies padding for the amount
/// of bytes used by a specified <see cref="AttributeType"/>.
/// </summary>
/// <param name="bufferSubset">The buffer subset in which the padding will be applied.</param>
/// <param name="attribType">The type of the attribute, for calculating paddign.</param>
/// <remarks>
/// Padding indicators ignore padding based on type that occurs when using compensation
/// for struct padding (which is the default behavior in <see cref="VertexArray"/>).
/// </remarks>
public static VertexAttribSource CreatePadding(DataBufferSubset bufferSubset, AttributeType attribType)
{
return(new VertexAttribSource(bufferSubset, VertexAttribDescription.CreatePadding(attribType)));
}
/// <summary>
/// Creates a <see cref="VertexAttribSource"/> that specifies padding for an
/// amount of bytes calculated based on the baseType and size parameters.
/// </summary>
/// <param name="bufferSubset">The buffer subset in which the padding will be applied.</param>
/// <param name="baseType">The base type of the attribute.</param>
/// <param name="size">The size of the attribute.</param>
public static VertexAttribSource CreatePadding(DataBufferSubset bufferSubset, VertexAttribPointerType baseType, uint size)
{
return(new VertexAttribSource(bufferSubset, VertexAttribDescription.CreatePadding(baseType, size)));
}
