3D Fish Anatomy vs ER3D Euler Rotations in 3D

The 3D Fish Anatomy app is an interactive model of a perch, a teleost fish. The software allows the visualization of details of internal and external anatomy of this ray-finned fish. The 3D Fish Anatomy app is an interactive model of a perch (Perca flavens) that allows for the animal internal systems to be viewed and manipulated layer by layer or simultaneously with other layers, at various zoom levels. Individual anatomical structures can be highlighted and display a caption, or they can be removed to permit viewing of deeper structures. This app is an ideal start in the study or teaching of Zoology, Ichthyology and Fish Biology. Available in English, Spanish, French and Brazilian Portuguese. This App is intended to be a supplemental educational resource and should NOT be used as the only source of educational information, nor should the Software be used as medical advice or for medical diagnoses of any kind.

Three-dimensional (3D) rotational kinematics are one of the most important, and yet also one of the most easily misunderstood topics of advanced mechanical engineering dynamics and trajectory simulation modeling. The ER3D mobile app aims to be a teaching aid for students and interested learners who want to understand these fundamental kinematics in an interactive and visually appealing setting, including in Augmented Reality (AR). Features of the app include: - Space Shuttle model for teaching a 3-2-1 rotation sequencee - Gyroscope model for teaching a 3-1-3 rotation sequence - Sliders to update 3-2-1 (yaw, pitch, and roll) or 3-1-3 (procession, nutation, and spin) angles - Globe Earth that may be rotated to visualize locations at different latitudes and longitudes - Context menus with text descriptions of the kinematic properties ER3D is free and open source, developed for iPhone, iPad, macOS, and VisionOS using SwiftUI and RealityKit.