init

2026-03-13 11:24:41 +08:00
commit 04e2bb29c7
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+function plot_3d_grid_voxel_function_fixed(nx, ny, nz, dx, dy, dz, data)
+% 使用自定义voxel函数绘制三维网格（每个网格单一颜色）
+% 输入参数：
+%   nx, ny, nz - 各方向的网格数
+%   dx, dy, dz - 各方向的网格尺寸向量
+%   data - 物理量数据，维度为(nx, ny, nz)
+
+% 计算每个网格的中心坐标
+x_center = zeros(nx, 1);
+x_center(1) = dx(1)/2;
+for i = 2:nx
+    x_center(i) = x_center(i-1) + (dx(i-1) + dx(i))/2;
+end
+
+y_center = zeros(ny, 1);
+y_center(1) = dy(1)/2;
+for i = 2:ny
+    y_center(i) = y_center(i-1) + (dy(i-1) + dy(i))/2;
+end
+
+z_center = zeros(nz, 1);
+z_center(1) = dz(1)/2;
+for i = 2:nz
+    z_center(i) = z_center(i-1) + (dz(i-1) + dz(i))/2;
+end
+
+% 创建图形
+figure('Position', [100, 100, 1000, 800]);
+hold on;
+
+% 设置颜色映射
+colormap jet;
+caxis([min(data(:)), max(data(:))]);
+
+% 绘制每个体素
+alpha_val = 0.9;  % 透明度
+
+for i = 1:nx
+    for j = 1:ny
+        for k = 1:nz
+            % 绘制体素 - 传递当前网格的值
+            voxel_fixed([x_center(i), y_center(j), z_center(k)], ...
+                        [dx(i), dy(j), dz(k)], ...
+                        data(i, j, k), alpha_val);
+        end
+    end
+end
+
+% 设置图形属性
+colorbar;
+xlabel('X');
+ylabel('Y');
+zlabel('Z');
+title('三维笛卡尔网格全充满物理量分布（体素法，单一颜色）');
+axis equal;
+view(3);
+grid on;
+box on;
+
+% 光照设置
+lighting gouraud;
+light('Position', [1 1 1], 'Style', 'infinite');
+light('Position', [-1 -1 -1], 'Style', 'infinite');
+
+hold off;
+end
+
+function voxel_fixed(center, size, value, alpha)
+% 绘制单个体素的辅助函数（每个面使用相同颜色）
+% center: [x, y, z] 中心坐标
+% size: [dx, dy, dz] 尺寸
+% value: 物理量值
+% alpha: 透明度
+
+% 计算8个顶点
+x = center(1) + [-size(1)/2, size(1)/2];
+y = center(2) + [-size(2)/2, size(2)/2];
+z = center(3) + [-size(3)/2, size(3)/2];
+
+% 创建8个顶点
+vertices = [x(1), y(1), z(1);
+            x(2), y(1), z(1);
+            x(2), y(2), z(1);
+            x(1), y(2), z(1);
+            x(1), y(1), z(2);
+            x(2), y(1), z(2);
+            x(2), y(2), z(2);
+            x(1), y(2), z(2)];
+
+% 6个面的顶点索引
+faces = [1 2 3 4;
+         5 6 7 8;
+         1 2 6 5;
+         2 3 7 6;
+         3 4 8 7;
+         4 1 5 8];
+
+% 关键修改：使用 'flat' 并确保所有面使用相同的颜色值
+patch('Vertices', vertices, 'Faces', faces, ...
+      'FaceColor', 'flat', ...  % 'flat' 确保每个面单一颜色
+      'FaceVertexCData', value * ones(size(faces, 1), 1), ...  % 所有面相同颜色
+      'CDataMapping', 'scaled', ...
+      'FaceAlpha', alpha, ...
+      'EdgeColor', 'none');
+end