Expands the dimensions of box by the given scalar value.
If scalar is positive, the #graphene_box_t will grow; if scalar is negative, the #graphene_box_t will shrink.
a scalar value
return location for the expanded box
Expands the dimensions of box by the given scalar value.
If scalar is positive, the #graphene_box_t will grow; if scalar is negative, the #graphene_box_t will shrink.