The Orange Duck | Daniel Holden

The Orange Duck. Computer Science, Machine Learning, Programming, Art, Mathematics, Philosophy, and Short Fiction.

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Theorangeduck.com news digest

  • 54 years

    Unrolling Rotations

    Today I'd like to talk about unrolling rotations. Not only is this something I wish I'd been told about a lot earlier when I started doing animation programming (for example, I'm pretty sure some of the artefacts in the animation of my PFNN character...

  • 54 years

    Animation Blend Spaces without Triangulation

    In my previous article I talked about how to compute the weighted average of a set of quaternions in a robust and accurate way. The most obvious application for this in animation and video games is in blending multiple animations together.
    Most game engines provide some sort of blending functionality like this for sets of animations. Slerp or nlerp is usually used when blending two animations in a 1D parameter space, while in a 2D parameter space many engines triangulate the data points...

  • 54 years

    Quaternion Weighted Average

    How do we find the weighted average of a set of quaternions?
    This is not immediately obvious, in particular given that a quaternion and its negation represent the same rotation - so just doing a normal weighted sum of the raw 4d quaternion values is not going to work....

  • 54 years

    BVHView

    BVHView is a simple viewer for the .bvh animation file format written using raylib.
    Download (Windows) • Github • Web Demo
    About

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