We present an interactive visualization tool that provides users with the capability of cutting away the surfaces of enclosing objects to reveal interior or occluded objects. This tool, known as RibbonView, is applied by mimicking the sweeping action of a paint roller across the surface of a smooth object. This virtual analogy of a familiar real-world action not only removes the occluding surfa...

This paper presents DigitalSculpture, an interactive sculpting framework founded upon isosurfaces extracted from recursively subdivided, 3D irregular grids. Our unique implicit surface model arises from an interpolatory, volumetric subdivision scheme that is C continuous across the domains defined by arbitrary 3D irregular grids. We assign scalar coefficients and color to each control vertex an...

In this paper we present our algorithm for animating fluids with a free surface. It is based on the Lattice-Boltzmann Method, instead of a direct discretization of the Navier-Stokes equations. This allows a relatively simple treatment of the free surface boundary conditions at high computational efficiency, without sacrificing the underlying physics. We give a detailed description of our algori...

Polyhedral mesh surfaces are widely utilized to represent objects reconstructed from 3D ranged images. In computer-aided engineering, it is desired to not only observe but also measure these three-dimensional objects. This paper presents an approach to measure the curve distance between two points on a polyhedral surface in the manner that simulates dragging a tapeline at the two points. After ...

We propose a method for interactive deformation of large detail meshes. Our method allows the users to manipulate the mesh directly using freely-selected handles on the mesh. To best preserve surface details, we introduce a new surface representation, the skin-detached surface. It represents a detail surface model as a peeled “skin” added over a simplified surface model. The “skin” contains the...

OBJECTIVE Liver surgery is difficult because of limited external landmarks, significant vascularity, and inexact definition of intra-hepatic anatomy. Intra-operative ultrasound (IOUS) has been widely used in an attempt to overcome these difficulties, but is limited by its two-dimensional nature, inter-user variability, and image obliteration with ablative or resectional techniques. Because the ...

Interactive rendering of global illumination effects is a challenging problem. While precomputed radiance transfer (PRT) is able to render such effects in real time the geometry is generally assumed static. This work proposes to replace the precomputed lighting response used in PRT by precomputed depth. Precomputing depth has the same cost as precomputing visibility, but allows visibility tests...

We describe a novel interface for composition of polygonal meshes based around two artist-oriented tools: Geometry Drag-and-Drop and Mesh Clone Brush. Our drag-and-drop interface allows a complex surface part to be selected and interactively dragged to a new location. We automatically fill the hole left behind and smoothly deform the part to conform to the target surface. The artist may increas...

Research into multi-surface systems goes back for more than thirty years, yet these systems have not been taken up in real-world settings. We believe the reason for the lack of adoption is that constructing multi-surface systems is costly and requires specialist knowledge of tasks related to device discovery, cross-platform interoperability, networking, and spatial tracking. These tasks represe...

We describe a novel approach for matching and recognition , based on deformable intensity surfaces. In this approach, the intensity surface of the image is modeled as a deformable thin plate, and its strain energy while deforming to a new image is measured for recognition. Each surface point has 3 degrees of freedom, thus capturing ne surface changes. The method is validated for recognition and...