Browsing by Author "Tigges, Mark"
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Item Open Access TEXTURE MAPPING THE BLOBTREE(1998-03-01) Tigges, Mark; Wyvill, BrianRecently an automatic solution to the problem of applying 2D textures to an implicit surface has been introduced (13). The method derives a uv-texture coordinate system by tracing particles from the implicit surface to a \fIsupport surface\fR. In this paper, we describe the adaptation of this algorithm to the \fIBlobTree\fR data structure. The \fIBlobTree\fR provides an implicit modelling system through a hierarchy of blends, CSG and warping applied to primitives. There are several problems involved in applying textures in such a general modelling system, particularly across CSG junctions. In this paper we identify these problems and introduce some simple solutions.Item Open Access TEXTURING COMPOSITE DEFORMABLE IMPLICIT OBJECTS(1998-03-01) Zonenschein, Ruben; Gomes, Jonas; Velho, Luiz; DeFigueiredo, Luiz Henrique; Tigges, Mark; Wyvill, BrianIn this paper we present a method for applying 2D textures onto composite and articulated objects defined by implicit functions. The method generates a particle system associated with the gradient vector field of an implicit function which acquires texture coordinates at a support surface. By extending this method to composite objects, an implicit surface may change its shape in time, while maintaining texture consistency. This approach prevents the appearance of undesirable effects such as ghosting and artifacts at the blending parts of an implicit object.