Mid-air ultrasound haptic technology can enhance user interaction and immersion in extended reality (XR) applications through contactless touch feedback. Yet, existing design tools for mid-air haptics primarily support creating tactile sensations (i.e., tactons) which cannot change at runtime. These tactons lack expressiveness in interactive scenarios where a continuous closed-loop response to user movement or environmental states is desirable. This paper introduces AdapTics, a toolkit featuring a graphical interface for rapid prototyping of adaptive tactons-dynamic sensations that can adjust at runtime based on user interactions, environmental changes, or other inputs. A software library and a Unity package accompany the graphical interface to enable integration of adaptive tactons in existing applications. We present the design space offered by AdapTics for creating adaptive mid-air ultrasound tactons and show the design tool can improve Creativity Support Index ratings for Exploration and Expressiveness in a user study with 12 XR and haptic designers.

翻译：空中超声触觉技术能够通过非接触式触觉反馈增强扩展现实（XR）应用中的用户交互与沉浸感。然而，现有空中触觉设计工具主要支持创建无法在运行时改变的触觉符号（tactons），在需要根据用户运动或环境状态实现连续闭环响应的交互场景中，其表现力存在不足。本文提出AdapTics工具包，其核心特色在于提供图形化界面，支持自适应触觉符号的快速原型设计——这类动态触觉信号可在运行时根据用户交互、环境变化或其他输入进行调整。该工具包配套提供软件库及Unity集成包，便于将自适应触觉符号集成至现有应用中。我们揭示了AdapTics为创建自适应空中超声触觉符号所开辟的设计空间，并通过一项面向12位XR与触觉设计师的用户研究证明，该设计工具能够显著提升创意支持指数（Creativity Support Index）在探索性与表现力维度的评分。