FIGURE 1.

Plots of polar angles θ as a function of the projection number n, generated for conventional SP and VASP with FOV anisotropy ratios. All VASP FOV anisotropy ratios as well as conventional SP used the same number (7922) of radial projections. Due to the square root function used in conventional SP to generate the polar angles, by default SP had an anisotropic FOV that closely matched the polar angles of VASP with FOV ratio of 68:68:100 (x:y:z). SP, spiral phyllotaxis; VASP, variable anisotropic FOV for spiral phyllotaxis