| attr | The vertex data attribute to check for. |
int The byte offset within a atream of the data attribute, or -1 if it is not present.
Gets the offset within a vertex buffer stream of a given vertex data attribute on this MeshData.
Meshes usually use a single vertex buffer stream, but it is possible to set up a vertex layout where attributes
use different vertex buffers (see SetVertexBufferParams). When you use such a layout, use this function to query where a given attribute is located in a stream.
Note that this function returns the byte offset within a stream, without specifying which stream. To identify the stream that contains a given attribute, use GetVertexAttributeStream.
See Also: GetVertexAttributeStream, vertexBufferCount, GetVertexBufferStride, Mesh.GetVertexAttributeOffset.