To appear in ACM Transactions on Graphics, 34, 4 (SIGGRAPH 2015)
PowerPoint slides available here.
Our open source implementation VPaint is available at www.vpaint.org
The successors of VPaint, VGC Illustration and VGC Animation, are being developed at VGC
Vector Graphics Animation with Time-Varying Topology
ACM Transactions of Graphics, 34, 4 (SIGGRAPH 2015)
We introduce the Vector Animation Complex (VAC), a novel data structure for vector graphics animation, designed to support the modeling of time-continuous topological events. This allows features of a connected drawing to merge, split, appear, or disappear at desired times via keyframes that introduce the desired topological change. Because the resulting space-time complex directly captures the time-varying topological structure, features are readily edited in both space and time in a way that reflects the intent of the drawing. A formal description of the data structure is provided, along with topological and geometric invariants. We illustrate our modeling paradigm with experimental results on various examples.