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92 lines
2.5 KiB
92 lines
2.5 KiB
3 years ago
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%--------------------------
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% @Author: Jingqiao Hu
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% @Date: 2022-05-02 20:28:27
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% @LastEditTime: 2022-05-03 14:46:16
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%--------------------------
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% function pure_CVT()
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nelx = 4;
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nely = 2;
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nelz = 1;
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microx = 64;
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dx = 1;
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%% init
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lx = dx * microx;
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globalx = nelx * microx;
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globaly = nely * microx;
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globalz = nelz * microx;
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maxx = globalx / 2; minx = -maxx;
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maxy = globaly / 2; miny = -maxy;
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maxz = globalz / 2; minz = -maxz;
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% [gx, gy, gz] = meshgrid(linspace(minx,maxx,8), linspace(miny,maxy,4), linspace(miny,maxy,2));
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gx = randi([minx, maxx],64,1);
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gy = randi([miny, maxy],64,1);
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gz = randi([minz, maxz],64,1);
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seeds = [gx(:), gy(:), gz(:)];
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npnts = size(seeds, 1);
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T = repmat(8, npnts, 1);
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[xval, xold1, xold2, xmin, xmax, low, upp, m_mma, c_mma, d_mma, a0_mma, ...
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a_mma] = MMA_paras(seeds, maxx, minx, maxy, miny, maxz, minz);
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loop = 0;
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while loop < 100
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loop = loop + 1;
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indices = 1 : int32(npnts);
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[c_edges, cenP, vedges, ~, c_nnbSeedIDX] = intersection_info(seeds, ...
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indices, nelx, nely, nelz, microx, 'cantilever');
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MMCs = update_MMCs(vedges, T, c_nnbSeedIDX);
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plot_mmc(MMCs, minx, maxx, miny, maxy, minz, maxz);
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[E, dE] = cvt_energy(seeds, cenP);
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f0val= E;
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df0dx= dE;
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fval = 0;
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dfdx = repmat(1, 1, size(seeds, 1)*3);
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[xmma, ~, ~, ~, ~, ~, ~, ~, ~, low, upp] = mmasub_mmc(1, npnts * 3, ...
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loop, xval, xmin, xmax, xold1, xold2, f0val, df0dx, fval, dfdx,...
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low, upp, a0_mma, a_mma, c_mma, d_mma);
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xold2 = xold1; xold1 = xval;
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xval = xmma;
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seeds = reshape(xmma, 3, [])';
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end
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write_cin(seeds, 'box');
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% end
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function [xval, xold1, xold2, xmin, xmax, low, upp, m_mma, c_mma, d_mma, a0_mma, ...
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a_mma] = MMA_paras(seeds, maxx, minx, maxy, miny, maxz, minz)
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np = size(seeds, 1);
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xval = reshape([seeds]', [], 1);
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xold1= xval; xold2 = xval;
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xmin = repmat([minx, miny, minz], np, 1)';
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xmax = repmat([maxx, maxy, maxz], np, 1)';
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xmin = xmin(:);
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xmax = xmax(:);
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low = xmin; upp = xmax;
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m_mma = 1; % number of constrain
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c_mma = 1000*ones(m_mma,1); d_mma = zeros(m_mma,1); a0_mma = 1; a_mma = zeros(m_mma,1);
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end
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function [E, dE] = cvt_energy(seeds, cenP)
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npnts = size(seeds, 1);
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E0 = sum((seeds - cenP) .^ 2, 2); % [n,1]
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dE0 = 2 * (seeds - cenP); % [n,2]
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E = sum(E0);
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dE = dE0;
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dE = reshape(dE', [], 1);
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end
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