Surface deformations based on physically-based simulations are used to represent elastic motions such as human skins or clothes in the field of 3DCG applications. LSM (Lattice Shape Matching) [Rivers and James 2007] has particularly attracted attention as a fast and robust method which achieves elastic-like motions. However, the original LSM ...
Posted in Computer Graphics
In this paper, we propose a fragment-based evaluation method for non-uniform B-spline surfaces using recent programmable graphics hardware (GPU). A position on a non-uniform B-spline surface is evaluated by the linear combination of both control points and B-spline basis functions. Hence the computational costs can be reduced by pre-computing a ...
Posted in Free-Form Surface Modeling, GPU Computing
Implicit surface is a well-known surface representation. Geometric details of an object can be represented using less surface primitives than other representations such as polygonal meshes. In this paper, we propose a fast and a direct rendering method of SLIM (Sparse Low-degree IMplicit) surfaces using recent programmable GPUs. Our approach ...
Posted in Computer Graphics, GPU Computing, Implicit Surfaces
This paper describes an efficient method for the hierarchical approximation of implicit surfaces from polygonal meshes. A novel error function between a polygonal mesh and an implicit surface is proposed. This error function is defined so as to be scale-independent on its global behavior as well as to be area-dependent ...
Posted in Implicit Surfaces, Meshes, Shape Modeling
In this research, a method for free-form deformation of SLIM (Sparse Low-degree IMplicit) surfaces is presented. By employing a Laplacian based mesh deformation technique, a global deformation is realized as movements of the centers of the local function supports. A graph connectivity for defining the Laplacians is simply created using ...
Posted in Implicit Surfaces, Shape Modeling
In this paper, we propose a method for directly rendering point sets which only have positional information by using recent graphics processors (GPUs). Almost all the algorithms in our method are processed on GPU. Our point-based rendering algorithms apply an image buffer which has lower-resolution image than a frame buffer. ...
Posted in Computer Graphics, GPU Computing
Spherical parameterization is one of geometry processing techniques which maps a mesh to a sphere, and is expected to the use in the various applications of computer graphics, CAD/CAM and so on. In this paper, we propose a robust and fast computation method for high quality conformal spherical parameterization. ...
Posted in Meshes, Shape Modeling
There is a crucial demand in the computer animation industry to make animations that blend animator-specified expressive motion with physics-based realism. We propose a novel framework to create directable animation of elastically deformable objects. The directable animation is created with animator-specified keyframes and the motion trajectory of the deformable ...
Posted in Computer Graphics
We have developed the systems of reconstructing the 3D computational models of tectonic structure called CHIKAKU DB/CAD as a part of projects for developing simulation software, for the purpose of the clarification of the mechanism of earthquakes, and the prediction of the earthquake wave propagation. The main purpose of the ...
Posted in Free-Form Surface Modeling
We propose image-based point rendering (IBPR) for multiple range images from 3D scanners. Our approach is a natural extension of the method called pull-push so as to render scanned points with some measurement errors. Several extensions for rendering range images are proposed. One is a seamless rendering of a ...
Posted in Computer Graphics
