Shrink

Shrink Wrap is a modifier that projects its targets point towards the sub object of the deformer. Parallel, spherical or cylinder wise projection can be defined. Collision detection system is used to constraint the shrink effect.

To use the tool, multi select one or more target objects (particles, freeform surfaces) and then one 'tool' object'. Then enter two points through the view window to define the geometry of the projection. The interpretation of the two defined points depends on the selected shrink projection as follows:

  • Parallel: The line between the two points defines a fixed shrinking direction. Only direction matters, line position is irrelevant.
  • Cylinder: Points are projected perpendicularly towards the defined axis line. Set the axis carefully inside the cylindrically shrunk geometry.
  • Spherical: Points are projected towards the first defined point. Direction of the line is irrelevant in this case.

In all three projections, the length of the defined line sets the maximum limit for the shrink effect. Furthermore, spherical shrink does no shrink points beyond the center point and cylindrical shrink does not shrink points to the opposite side of the shrink axis.

The shrink object defines the following options:

Type

Projection type: parallel, cylindrical or spherical.

Weight

Strenght of the deformation.

To wrap a nurbs sphere around an analytic cube:

1. Create a point dense nurbs sphere and a smaller analytic cube inside the sphere.

2. Select the nurbs sphere and the analytic cube, in this order. Activate Modifier/Shrink tool.

3. Set Projection=Spherical from the tool bar.

4. Click in the middle of the sphere. Points will be projected towards the first defined point. Move the mouse pointer to define the amount of shrinking, then click second time. In spherical shrink, the direction of the second point from the first point does not matter, only the distance between the two points.