Fill a color array with opaque white for the first count items.
Used as the no-color default by Lines and GSplats projections — the
per-vertex color attribute defaults to white when the node has no
colors array. components is 3 (RGB) or 4 (RGBA); the alpha fill
of 1.0 is "fully opaque", the per-element-opacity identity.
Fill a color array with opaque white for the first
countitems. Used as the no-color default by Lines and GSplats projections — the per-vertex color attribute defaults to white when the node has nocolorsarray.componentsis 3 (RGB) or 4 (RGBA); the alpha fill of 1.0 is "fully opaque", the per-element-opacity identity.