• David Thompson's avatar
    Add a glyph-mapped representation for instances. · 0d5f5e93
    David Thompson authored
    This MR, in tandem with SMTK!703, adds support for model instance entities.
    Instances are entities whose shape is dictated by a _prototype_ model entity.
    The prototype's geometry may be transformed (via translation, rotation, and
    scaling) but is otherwise unchanged. This MR only supports translation, not
    rotation and scaling. A single instance may have multiple copies of its prototype.
    Each copy is called a _placement_.
    
    In order to render instances, SMTK's source VTK filter provides additional
    outputs for prototype and instance-placement points. CMB exposes these via a
    new representation maintained by ModelBuilder.
    0d5f5e93