Sketch-based Dynamic Illustration of Fluid Systems

Abstract

This paper presents a lightweight sketching system that enables interactive illustration of complex fluid systems. Users can sketch on a 2.5-dimensional (2.5D) canvas to design the shapes and connections of a fluid circuit. These input sketches are automatically analyzed and abstracted into a hydraulic graph, and a new hybrid fluid model is used in the background to enhance the illustrations. The system provides rich simple operations for users to edit the fluid system incrementally, and the new internal flow patterns can be simulated in real time. Our system is used to illustrate various fluid systems in medicine, biology, and engineering. We asked professional medical doctors to try our system and obtained positive feedback from them.

Sketch2VF: Sketch‐based flow design with conditional generative adversarial network

“…Flow Control Tool: First, the user draws several open strokes that represent the local fluid flow on the canvas. In contrast to simple “force” lines that control a fluid force, our flow strokes do not require careful tuning of parameters such as velocity. The system optimizes the global flow field with local flow constraints.…”

“…13 Moreover, to match a velocity field to a target field, a linear feedback loop was adopted in the path-based control of smoke animations. 14 Zhu et al 3 proposed a method for manually constructing 2.5-dimensional models while visualizing the fluid flow. However, it remains difficult to directly control local flow movement with this approach.…”

“…Various sketch-based interfaces to create a 2D fluid design from hand-drawn strokes have been proposed recently. Zhu et al 3 discussed a sketching system of fluid animation for illustrating different fluid systems. Energy-Brushes adopted the flow elements to composite a stable and repetitive 2D velocity field.…”

SurfCuit: Surface-Mounted Circuits on 3D Prints

“…While the user edits the circuit in one mode, a small window highlights the electric parts or traces currently being edited in the other mode, making 2D/3D correspondence easy to understand. Note that we are inspired by existing works showing highly abstracted schematic diagram while editing complex models [26,12]. The schematic diagram is desirable as a circuit input rather than drawing traces directly on a 3D surface because schematics are symbolized and thus easily comprehensible.…”

Interactive Procedural Modelling of Coherent Waterfall Scenes

“…Zhu et al . [ZIH*11] introduce an interactive flow and diffusion editor with a sketching interface. The flow textures we use combine ideas from all of these approaches, and are enhanced by simple forms of particle systems, inspired by work from Holmberg and Wünsche [HW04].…”