下面这段程序无法正常运行，请问如何修正% 创建手指骨骼结构 numBones = 3; % 骨头数量 boneLength = 20; % 骨头长度 boneRadius = [2, 1.5, 1]; % 每个骨头的半径 jointPositions = [0, 0, 0; boneLength/2, 0, 0; boneLength, 0, 0]; % 每根骨头上关节的位置 bones = cell(numBones, 1); for i = 1:numBones if i == 1 prevPos = [0, 0, 0]; else prevPos = jointPositions(i-1, :); end curPos = jointPositions(i, :); radius = boneRadius(i); [x,y,z] = cylinder(radius, 50); dist = norm(curPos - prevPos); z = z * dist; x = x + curPos(1); y = y + curPos(2); z = z + prevPos(3); bones{i} = cat(2, x(:), y(:), z(:)); end % 创建皮肤表面 skin = []; offset = 0; % 点的偏移量 for i = 1:numBones if i == 1 skin = bones{1}; offset = size(skin, 1); else % 计算两个点云之间的凸壳 K = convhulln([bones{i-1}; bones{i}], 'QJ Pp'); points = [bones{i-1}; bones{i}(K(:,1), :)]; [~, IA, ~] = unique(points, 'rows', 'stable'); % 删除重复点 points = points(IA, :); tri = K + offset; % 加上偏移量 triRep = repmat(i-1, size(tri, 1), 1); % 创建一个表示骨头索引的向量 skin = [skin; points]; offset = size(skin, 1); skinTri = triangulation(tri, points); % 计算连接矩阵 skinTri.FaceVertexCData = repmat(triRep,1,3); % 按骨头着色 end end % 绘制皮肤表面 trisurf(skinTri, 'FaceColor', 'interp', 'EdgeColor', 'none'); axis equal; % 添加载荷并形变 force = [0, 0, -10]; % 施加的力 displacement = 2; % 形变程度（位移） skin = skin + displacement * repmat(force, size(skin, 1), 1); % 将皮肤表面沿着施加力的方向移动一定距离 % 重新计算连接矩阵 for i = 2:numBones idx = find(skinTri.FaceVertexCData(:,1) == i-1); tri = skinTri(idx,:); points = skin(tri(:),:); [~, IA, IB] = unique(points, 'rows', 'stable'); % 删除重复点 tri = reshape(IB(tri), size(tri)); points = points(IA, :); skinTri(idx,:) = []; skinTri = triangulation(tri,points,'FaceColor','interp','EdgeColor','none'); end % 绘制形变后的皮肤表面 trisurf(skinTri, 'FaceColor', 'interp', 'EdgeColor', 'none'); axis equal;

在这段程序中，存在一些错误：

1. 在计算连接矩阵时，应该将所有的骨头都考虑进去，而不是只考虑相邻的两根骨头之间的点云。因此，在第一个for循环中应该记录所有的点云，然后在第二个for循环中根据每个三角形的点的索引来确定所属的骨头。

2. 在重新计算连接矩阵时，应该先将所有的三角形删除，然后重新计算整个皮肤表面的连接矩阵。

以下是修正后的程序：

% 创建手指骨骼结构
numBones = 3; % 骨头数量
boneLength = 20; % 骨头长度
boneRadius = [2, 1.5, 1]; % 每个骨头的半径
jointPositions = [0, 0, 0; boneLength/2, 0, 0; boneLength, 0, 0]; % 每根骨头上关节的位置
bones = cell(numBones, 1);
for i = 1:numBones
    if i == 1
        prevPos = [0, 0, 0];
    else
        prevPos = jointPositions(i-1, :);
    end
    curPos = jointPositions(i, :);
    radius = boneRadius(i);
    [x,y,z] = cylinder(radius, 50);
    dist = norm(curPos - prevPos);
    z = z * dist;
    x = x + curPos(1);
    y = y + curPos(2);
    z = z + prevPos(3);
    bones{i} = cat(2, x(:), y(:), z(:));
end

% 创建皮肤表面
skin = [];
for i = 1:numBones
    skin = [skin; bones{i}];
end

offset = 0; % 点的偏移量
for i = 1:numBones
    % 计算两个点云之间的凸壳
    if i > 1
        K = convhulln([bones{i-1}; bones{i}], 'QJ Pp');
        points = [bones{i-1}; bones{i}(K(:,1), :)];
        [~, IA, ~] = unique(points, 'rows', 'stable');
        % 删除重复点
        points = points(IA, :);
        tri = K + offset;
        % 加上偏移量
        triRep = repmat(i-1, size(tri, 1), 1); % 创建一个表示骨头索引的向量
        skin = [skin; points];
        offset = size(skin, 1);
        skinTri{i-1} = triangulation(tri, points);
        skinTri{i-1}.FaceVertexCData = repmat(triRep,1,3); % 按骨头着色
    end
end

% 绘制皮肤表面
figure;
trisurf(skinTri{1}, 'FaceColor', 'interp', 'EdgeColor', 'none');
axis equal;

% 添加载荷并形变
force = [0, 0, -10]; % 施加的力
displacement = 2; % 形变程度（位移）
skin = skin + displacement * repmat(force, size(skin, 1), 1); % 将皮肤表面沿着施加力的方向移动一定距离

% 重新计算连接矩阵
tri = [];
for i = 1:numBones-1
    tri = [tri; skinTri{i}.ConnectivityList];
end
points = skin(tri(:),:);
[~, IA, IB] = unique(points, 'rows', 'stable');
% 删除重复点
tri = reshape(IB(tri), size(tri));
points = points(IA, :);
skinTri = triangulation(tri,points,'FaceColor','interp','EdgeColor','none');

% 绘制形变后的皮肤表面
figure;
trisurf(skinTri, 'FaceColor', 'interp', 'EdgeColor', 'none');
axis equal;