Question: plot3d of stable values

Hi, I have this values I want to plot as three dimension how can I plot it?

ApproximateSol := proc (w, t) options operator, arrow; w^2+t+rtable(1 .. 1, 1 .. 1, {(1, 1) = (.2960214364*piecewise(0 <= w and w < 1, 1)+.1939557186*piecewise(0 <= w and w < 1, 4*w-2)+0.2635024425e-1*piecewise(0 <= w and w < 1, 16*w^2-16*w+3))*(0.7620592980e-10*piecewise(0 <= t and t < 1, 1)+0.1532687805e-9*piecewise(0 <= t and t < 1, 4*t-2)+0.8496500063e-10*piecewise(0 <= t and t < 1, 16*t^2-16*t+3))+(-.2380729574*piecewise(0 <= w and w < 1, 1)-0.9481780593e-1*piecewise(0 <= w and w < 1, 4*w-2)+0.442773709e-1*piecewise(0 <= w and w < 1, 16*w^2-16*w+3))*(-0.2362176714e-9*piecewise(0 <= t and t < 1, 1)+0.6793447600e-10*piecewise(0 <= t and t < 1, 4*t-2)+0.2039654777e-9*piecewise(0 <= t and t < 1, 16*t^2-16*t+3))+(0.7931761947e-1*piecewise(0 <= w and w < 1, 1)+0.967928372e-2*piecewise(0 <= w and w < 1, 4*w-2)-0.2747829289e-1*piecewise(0 <= w and w < 1, 16*w^2-16*w+3))*(-0.1118492678e-9*piecewise(0 <= t and t < 1, 1)-0.5202991920e-10*piecewise(0 <= t and t < 1, 4*t-2)+0.1128321001e-9*piecewise(0 <= t and t < 1, 16*t^2-16*t+3))}, datatype = anything, subtype = Matrix, storage = rectangular, order = Fortran_order) end proc