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annotate +time/Rungekutta4proper.m @ 577:e45c9b56d50d feature/grids

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Add an Empty grid class The need turned up for the flexural code when we may or may not have a grid for the open water and want to plot that solution. In case there is no open water we need an empty grid to plot the empty gridfunction against to avoid errors.
author Jonatan Werpers <jonatan@werpers.com>
date Thu, 07 Sep 2017 09:16:12 +0200
parents e1a05acc1b5d
children c6fcee3fcf1b 8894e9c49e40
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1 classdef Rungekutta4proper < time.Timestepper
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2 properties
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3 F
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9 end
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12 methods
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13 % Timesteps v_t = F(v,t), using RK4 fromt t = t0 with timestep k and initial conditions v = v0
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14 function obj = Rungekutta4proper(F, k, t0, v0)
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15 obj.F = F;
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16 obj.k = k;
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17 obj.t = t0;
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18 obj.v = v0;
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19 obj.m = length(v0);
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20 obj.n = 0;
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21 end
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23 function [v,t] = getV(obj)
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24 v = obj.v;
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25 t = obj.t;
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26 end
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28 function obj = step(obj)
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29 obj.v = time.rk4.rungekutta_4(obj.v, obj.t, obj.k, obj.F);
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30 obj.t = obj.t + obj.k;
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31 obj.n = obj.n + 1;
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32 end
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33 end
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36 methods (Static)
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37 function k = getTimeStep(lambda)
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38 k = rk4.get_rk4_time_step(lambda);
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39 end
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40 end
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