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+# 在指定范围内生成曲线网格
+
+本教程简要介绍如何在指定范围内生成曲线网格。
+
+[返回示例目录](index.md)
+
+以下保留原笔记本的代码和已保存输出；转换过程中未重新执行代码。
+
+首先导入所需的库。
+
+```python
+import matplotlib.pyplot as plt
+import numpy as np
+from meshkernel import (
+    GeometryList,
+    GriddedSamples,
+    MakeGridParameters,
+    MeshKernel,
+    MeshRefinementParameters,
+    ProjectionType,
+    RefinementType,
+)
+```
+
+## 在球面坐标系中创建曲线网格
+
+网格从原点延伸到右上角，自动计算行数和列数，并调整纬度，使实际距离上的纵横比接近 1。
+
+```python
+lon_min, lon_max = -1, -0.2
+lat_min, lat_max = 49.1, 49.6
+lon_res, lat_res = 0.1, 0.1
+
+make_grid_parameters = MakeGridParameters()
+make_grid_parameters.origin_x = lon_min
+make_grid_parameters.origin_y = lat_min
+make_grid_parameters.upper_right_x = lon_max
+make_grid_parameters.upper_right_y = lat_max
+make_grid_parameters.block_size_x = lon_res
+make_grid_parameters.block_size_y = lat_res
+
+mk = MeshKernel(projection=ProjectionType.SPHERICAL)
+mk.curvilinear_compute_rectangular_grid_on_extension(make_grid_parameters)
+```
+
+将曲线网格转换为非结构网格。
+
+```python
+mk.curvilinear_convert_to_mesh2d()
+```
+
+绘制网格。
+
+```python
+mesh2d = mk.mesh2d_get()
+fig, ax = plt.subplots()
+mesh2d.plot_edges(ax, color="black")
+```
+
+![单元格 9 的绘图输出](images/07_curvilineargrid_with_defined_extension_9_0.png)
+
+## 在笛卡尔坐标系中创建曲线网格
+
+在笛卡尔坐标系中，无需调整 y 坐标。
+
+```python
+min_x, min_y = 0, 0
+max_x, max_y = 10.0, 10.0
+block_size_x, block_size_y = 1, 2
+
+make_grid_parameters = MakeGridParameters()
+make_grid_parameters.origin_x = min_x
+make_grid_parameters.origin_y = min_y
+make_grid_parameters.upper_right_x = max_x
+make_grid_parameters.upper_right_y = max_y
+make_grid_parameters.block_size_x = block_size_x
+make_grid_parameters.block_size_y = block_size_y
+
+mk = MeshKernel(projection=ProjectionType.CARTESIAN)
+mk.curvilinear_compute_rectangular_grid_on_extension(make_grid_parameters)
+```
+
+将曲线网格转换为非结构网格。
+
+```python
+mk.curvilinear_convert_to_mesh2d()
+```
+
+绘制网格。
+
+```python
+mesh2d = mk.mesh2d_get()
+fig, ax = plt.subplots()
+mesh2d.plot_edges(ax, color="black")
+```
+
+![单元格 16 的绘图输出](images/07_curvilineargrid_with_defined_extension_16_0.png)