Coconuts not included Merging art with real data to animate bird flight


SOCIETY FOR INTEGRATIVE AND COMPARATIVE BIOLOGY
2021 VIRTUAL ANNUAL MEETING (VAM)
January 3 – Febuary 28, 2021

Meeting Abstract


41-2  Sat Jan 2  Coconuts not included: Merging art with real data to animate bird flight White, BJ*; Jackson, BE; Longwood University; Longwood University jacksonbe3@longwood.edu http://blogs.longwood.edu/jacksonlab/

Art as a tool for scientific communication has proven instrumental in the form of both public outreach and data visualization. To disseminate research to wider audience, illustration and animation with clear visual and auditory cues, but that accurately follows raw data, should be prioritized. Here, a 3D model of an American cliff swallow (Petrochelidon pyyrhonota) created in Autodesk Maya is rigged to be animated procedurally by following a series of coordinates from video-based 3D reconstruction. The model itself was created to not only match the manually digitized external landmarks in the raw data, but also to simulate the movements of underlying wing anatomy during flight. In order to animate portions of the wing not represented by data points, a variety of different techniques were used, chief among these being inverse kinematics (IK) and set driven keys. IK joints were primarily employed for the undigitized elbow of the wing to provide a reasonable range of flexion and extension during flight. Once the bones of the wing were articulating properly, the tissue and feather meshes were bound to the same rig as the skeleton, allowing all layers of the model to move together simultaneously. The expansion and contraction of the feather groupings were then handled using set driven keys, with two border feathers serving as deformation guides for each group. Ultimately, this rig has the potential to be used repeatedly with different data points, allowing for the streamlined creation of data-driven animation for future communication of avian flight dynamics.

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