A Vectorial Solver for Free-form Vector GradientReport as inadecuate




A Vectorial Solver for Free-form Vector Gradient - Download this document for free, or read online. Document in PDF available to download.

1 MANAO - Melting the frontiers between Light, Shape and Matter LaBRI - Laboratoire Bordelais de Recherche en Informatique, Inria Bordeaux - Sud-Ouest, LP2N - Laboratoire Photonique, Numérique et Nanosciences 2 LaBRI - Laboratoire Bordelais de Recherche en Informatique 3 LP2N - Laboratoire Photonique, Numérique et Nanosciences

Abstract : The creation of free-form vector drawings as been greatly improved in recent years with techniques based on harmonic or bi-harmonic interpolation. Such methods offer the best trade-off between spar- sity keeping the number of control points small and expressivity achieving complex shapes and gradients. Unfortunately, the lack of a robust and versatile method to compute such images still lim- its their use in real-world applications. In this paper, we introduce a vectorial solver for the computation of free-form vector gradi- ents. Based on Finite Element Methods FEM, its key feature is to output a low-level vector representation suitable for very fast GPU accelerated rasterization and close-form evaluation. This interme- diate representation is hidden from the user: it is dynamically up- dated using FEM during drawing when control points are edited. Since it is output-insensitive, our approach enables novel possibili- ties for bi-harmonic vector drawings such as instancing, layering, deformation, texture and environment mapping. Finally, in this pa- per we also generalize and extend the set of drawing possibilities. In particular, we show how to locally control vector gradients.





Author: Simon Boyé - Pascal Barla - Gael Guennebaud -

Source: https://hal.archives-ouvertes.fr/



DOWNLOAD PDF




Related documents