Fig. 5
A diagrammatic representation of a segment of a quadrupedal trackway as it is being traversed by a schematic trackmaker governed by a specific choice of gait parameters for this trial. The track locations are from the BEB-500 S1 trackway; the direction of travel was from left to right (closed shapes indicate the tracks, with pes tracks in blue and orange, and manus tracks in green and mauve). In this trial the gait is a walk (LP = 0.25, DF = 0.5). The trackmaker is indicated by the four locators (with open symbols, a blue ring for left pes, etc.). At the moment depicted, PR, PL, and MR are in support and standing on tracks, and ML is in transition. Line segments represent the manus and pes couplers, and the line segment CL that connected their midpoints represents the distance between the two couplers. The gray boxes represent the spatial uncertainty of each coupler