/**
Moves a brush plane along its normal so that the "expanded" plane will touch the centre
of the bounds precisely when the original plane would touch the bounds itself.
@param brushPlane The original plane
@param bounds The bounds
@return The expanded plane
*/
BrushExpander::BrushPlane BrushExpander::expand_brush_plane(const BrushPlane& brushPlane, const Bounds& bounds)
{
const Vector3d& n = brushPlane.plane.normal();
const double d = brushPlane.plane.distance_value();
double expansionDistance = bounds.brush_expansion_distance(n);
return BrushPlane(Plane(n, d+expansionDistance), brushPlane.auxData);
}
