@pimms.value<EOL><INDENT>def visual_coordinates(polar_angles, eccentricities):<DEDENT>
z = eccentricities * np.exp(<NUM_LIT> * np.pi/<NUM_LIT> * (<NUM_LIT> - polar_angles))<EOL>return pimms.imm_array([z.real, z.imag])<EOL>
mdl.cortical_coordinates is the coordinate matrix for the given retinotopy mesh model mdl's
representation of the cortical surface.