"Interleaved" means that multiple attributes, possibly of different types, (e.g., position, normal, uv, color) are packed into a single array buffer.
An introduction into interleaved arrays can be found here: Interleaved array basics
webgl / buffergeometry / points / interleaved
array -- A typed array with a shared buffer. Stores the geometry data.
stride -- The number of typed-array elements per vertex.
A typed array with a shared buffer. Stores the geometry data.
The number of typed-array elements per vertex.
Gives the total number of elements in the array.
Default is false.
Object containing offset and count.
Default is 0.
Default is -1.
A version number, incremented every time the needsUpdate property is set to true.
Default is true.
Default is false. Setting this to true increments version.
array - must be a Typed Array.
Set dynamic to value.
Copies another InterleavedBuffer to this InterleavedBuffer.
Copies data from attribute[index2] to array[index1].
value - The source (typed) array.
offset - The offset into the target array at which to begin writing values from the source array. Default is 0.
Stores multiple values in the buffer, reading input values from a specified array.
Creates a clone of this InterleavedBuffer.
For more info on how to obtain the source code of this module see this page.