Graphviz Dot, Blender and FFmpeg: Scripted node placement and camera work & a few manual keyframes
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The scripted keyframes positioned the camera according to initial node positions defined by Graphviz Dot, using its '-T xdot' argument on a simpler Dot file (with unpositioned node and edge definitions) to give a Dot file with nodes and edge ends positioned and edge curves plotted using Cartesian co-ordinates.