Vector Graphics Complexes (SIGGRAPH 2014) скачать в хорошем качестве

Vector Graphics Complexes (SIGGRAPH 2014)

Authors: Boris Dalstein, Rémi Ronfard, and Michiel van de Panne. Published in: ACM Transactions on Graphics, 33, 4. *Update:* This technology will be implemented in VGC Illustration! More info: https://www.vgc.io Like this project? You can help this project via a donation: Tipeee: https://www.tipeee.com/vgcsoftware Patreon:   / vgcsoftware   SIGGRAPH talk:    • Vector Graphics Complexes (SIGGRAPH 2014 p...   Paper: https://www.borisdalstein.com/researc... Prototype: https://www.vpaint.org Progress Reports:    / vgcsoftware   Source Code (VPaint): https://github.com/dalboris/vpaint Source Code (VGC): https://github.com/vgc/vgc Email: boris@vgc.io Abstract: Basic topological modeling, such as the ability to have several faces share a common edge, has been largely absent from vector graphics. We introduce the vector graphics complex (VGC) as a simple data structure to support fundamental topological modeling operations for vector graphics illustrations. The VGC can represent any arbitrary non-manifold topology as an immersion in the plane, unlike planar maps which can only represent embeddings. This allows for the direct representation of incidence relationships between objects and can therefore more faithfully capture the intended semantics of many illustrations, while at the same time keeping the geometric flexibility of stacking-based systems. We describe and implement a set of topological editing operations for the VGC, including glue, unglue, cut, and uncut. Our system maintains a global stacking order for all faces, edges, and vertices without requiring that components of an object reside together on a single layer. This allows for the coordinated editing of shared vertices and edges even for objects that have components distributed across multiple layers. We introduce VGC-specific methods that are tailored towards quickly achieving desired stacking orders for faces, edges, and vertices.