613424.fig.002a
(a)
613424.fig.002b
(b)
Figure 2: Front tracking and markers. Circles represent markers along the fire line. Arrows show the propagation vector (bisector of the local angle at the marker 𝑃 0 between the left point 𝑃 l and the right point, 𝑃 r ). The grey area represents the burned fuel.