Fast Construction of Accurate Quaternion Splines Ravi Ramamoorthi and Alan H. Barr Computer Graphics Laboratory California Institute of Technology
Animations This page maintains links to animations in our SIGGRAPH 97 paper, Fast Construction of Accurate Quaternion Splines . An "I-shaped" object rotating while moving in a parabola Mpeg of final optimized animation in slow motion clearly showing the 7 keyframes Mpeg of initial unoptimized rotational path using cubic splines (after step 2 in the paper) Mpeg of final optimized animation (after step 5 in the paper) A molecular dynamics simulation. We took a molecular dynamics simulation (courtesy of Julius Su) with exotic initial conditions (suggested by Brian D'Urso) and resampled the rotations sparsely, interpolating to make animations. This video shows animations with 4 equally spaced keyframes. Mpeg of initial cubic spline animation (after step 2 in the paper). Note especially that the pink iodine molecules at the top and bottom of the picture move jerkily. Mpeg of the optimized animation (after step 5 in the paper). Note that the motion looks much smoother. Relevant Links Research Page for the paper. Postscript version of the Siggraph 97 paper. Ftp site for all the material in the CD-ROM.
	Showing the object path for the first animation. Keyframes have a dark circle behind them. Variable frames have blue trunks and those for computed animation frames are red. The top and bottom of the object are shown in green and yellow consistently for all frames.
	A still from the second animation (derived from a molecular dynamics simulation of iodine and benzene).

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