how to add multiple splines to generate a curvilinear grid

[lilianrocha]

Hello! I'm trying to generate a curvilinear grid using more than 1 spline, I have two grids using separated splines:

Grid 01

Grid 02 (full code at the bottom of the page)

When I define create_mk_instance_with_curvilinear_grid_from_transfinite_method(), only one spline can be added in mk.curvilinear_compute_transfinite_from_splines(splines, curvilinear_parameters), for example:

    splines = GeometryList(splines_x, splines_y)

    curvilinear_parameters = CurvilinearParameters()
    curvilinear_parameters.n_refinement = 10
    curvilinear_parameters.m_refinement = 10

    mk.curvilinear_compute_transfinite_from_splines(splines, curvilinear_parameters)

I need to generate only one grid using the splines in grids 01 and 02 and I didn't find a example at https://deltares.github.io/MeshKernelPy/, any help with this issue would be appreciated!

Besides the issue with the splines, I don't know why my grid is "distorted", it seems like it's being projected in a 3d plane:

I was expecting a grid like this, for example, without any distortions:

Here's the code I'm using to generate Grid 02, for example:
(this code was modified using examples found at https://deltares.github.io/MeshKernelPy/examples/04_curvilineargrid_basics.html#generate-a-curvilinear-grid-using-the-transfinite-interpolation-method)

import matplotlib.pyplot as plt
import numpy as np

from meshkernel import (
    CurvilinearParameters,
    MakeGridParameters,
    GeometryList,
    MeshKernel,
    SplinesToCurvilinearParameters,
    OrthogonalizationParameters,
)

def create_mk_instance_with_curvilinear_grid_from_transfinite_method():
    r"""A function for creating an instance of meshkernel with a curvilinear grid."""
    mk = MeshKernel()

    separator = -999.0
    splines_x = np.array(
        [
    206959.69,    207858.9,    separator,
    207397.14,    208247.75,    separator,
    198234.9,    197530.11,    separator,
    199352.84,    199061.2,    separator,
    208660.9,    208928.23,    separator,
    209219.87,    210070.47,    separator,
    212209.14,    212209.14,    separator,
    210969.69,    211552.96,    separator,
    209584.41,    211115.5,    separator,
    205768.84,    206619.44,    separator,
    205720.23,    206643.75,    separator,
    204772.41,    205379.99,    separator,
    203217.02,    203994.72,    separator,
    202415.02,    203411.44,    separator,
    201613.02,    202633.75,    separator,
    200276.35,    201588.72,    separator,
    193398.6,    196339.26,    separator,
    193593.02,    197116.96,    separator,
    193933.26,    196606.6,    separator,
    197481.5,    195634.47,    separator,
    200547.7,    201325.4,    separator,
    196898.23,    197287.08,    separator,
    198720.96,    198818.17,    separator,
    199182.72,    200154.84,    separator,
    208831.24,    207997.21,    206352.98,    205018.53,    202683.25,    201444.11,    200919.87,    200324.13,    199299.46,    198656.07,    197702.89,    197011.84,    196582.91,    196177.81,    195987.17,    196177.81,    196725.88,    197869.7,    199299.46,    200896.04,    201348.8,    201825.39,    202421.12,    202873.88,    203016.86,    203278.98,    203707.91,    204422.79,    205352.14,    206090.86,    206472.13,    206495.96,    206376.81,    206686.59,    207329.99,    207615.94,    207854.23,    208021.04,    208283.16,    209188.68,    209760.59,    210261.01,    210761.43,    211238.02,    211619.29,    211952.9,    212596.29,    213549.47,    214669.46,    216623.47,    217362.18,    218339.19,    219363.86,    220150.23,    220793.62,    221127.24,    221961.27,    222580.83,    223152.74,    223438.69,    223581.67,    223962.94,    225273.56,    226226.74,    226965.45,    227775.65,    228752.66,    229944.13,    230611.35,    231373.9,    231945.8,    232660.69,    233351.74,    234185.77,    235258.1,    236401.91,    236929.5,    237554.4,    237828.48,    238294.41,    238469.82,    238741.26,    239116.08,    239631.47,    240081.26,    240615.39,    240830.91,    241093.29,    241589.94,    241814.83,    242152.18,    242433.3,    242620.71,    242723.79,    242920.57,    243276.66,    243670.22,    244204.35,    244832.18,    245216.38,    245544.36,    246200.3,    246593.87,    247006.18,    247643.38,    248327.44,    249555.0,    250154.72,    250754.44,    251494.72,    251841.44,    252281.86,    252609.83,    252909.69,    253190.81,    253828.02,    254296.55,    254643.27,    254952.5,    256189.43,    separator,
    213205.56,    213302.78,    separator,
    213813.14,    214056.17,    separator,
    214590.84,    214931.08,    separator,
    217774.53,    218382.11,    separator,
    218576.53,    219791.69,    separator,
    219694.47,    220545.08,    separator,
    220666.59,    221201.26,    separator,
    221152.65,    221857.44,    separator,
    221906.05,    222683.75,    separator,
    222465.02,    223510.05,    separator,
    223267.02,    223874.59,    separator,
    224263.44,    225065.44,    separator,
    224968.23,    225867.44,    separator,
    225721.62,    226645.14,    separator,
    226799.78,    227703.34,    separator,
    227579.32,    228589.19,    separator,
    232345.17,    232929.83,    separator,
    228199.42,    229262.43,    separator,
    231494.76,    232185.72,    separator,
    230750.65,    231441.61,    separator,
    229209.28,    229935.67,    separator,
    230165.99,    230874.67,    separator,
    233071.57,    233815.68,    separator,
    233815.68,    234329.47,    separator,
    234612.94,    235109.01,    separator,
    235640.52,    236154.31,    separator,
    236473.21,    236916.13,    separator,
    237376.77,    237996.87,    separator,
    238368.92,    238758.69,    separator,
    209093.37,    207615.94,    206448.3,    205924.05,    205328.31,    204923.21,    204565.77,    203850.89,    202826.22,    202301.97,    201372.63,    200538.59,    198751.39,    197988.84,    197345.45,    196511.42,    195725.05,    195367.61,    195033.99,    194319.11,    193818.69,    193699.54,    193961.67,    194509.75,    194128.47,    194199.96,    194700.38,    195296.12,    196082.49,    196630.57,    197273.96,    197822.04,    198417.77,    198703.73,    199132.66,    199895.2,    200490.94,    200919.87,    201420.28,    201777.73,    201968.36,    202182.83,    202659.42,    203064.52,    203398.13,    203993.86,    204518.11,    204970.87,    205566.61,    206019.37,    205876.39,    205733.41,    205804.9,    206138.51,    206495.96,    207067.86,    207210.84,    207449.13,    207901.89,    208497.63,    209069.54,    209569.95,    209403.15,    209021.88,    209164.85,    209879.74,    210594.62,    211142.7,    212167.36,    212882.25,    213501.81,    214026.06,    214740.94,    215551.15,    216528.15,    217100.06,    217767.28,    218100.9,    218315.36,    218648.97,    219149.39,    219602.15,    220102.57,    220936.6,    221413.19,    222223.39,    222842.96,    222938.27,    223367.2,    223676.99,    224201.23,    224653.99,    224868.46,    225321.22,    226012.27,    226870.13,    227823.31,    228419.05,    229038.61,    229705.84,    230110.94,    230778.16,    231373.9,    231993.46,    232517.71,    232851.32,    233382.15,    233832.42,    234296.77,    234901.82,    235436.52,    236140.07,    236815.49,    237350.19,    237884.89,    238278.87,    238734.18,    239066.55,    239565.1,    240089.23,    240523.86,    240677.26,    240817.88,    241214.17,    241457.05,    241814.99,    242045.09,    242275.19,    242262.41,    242275.19,    242594.78,    242927.15,    243361.78,    243617.45,    244128.79,    244742.39,    245177.03,    245547.75,    245803.42,    245982.38,    246250.84,    246813.31,    247299.08,    247835.98,    248257.83,    248935.36,    249510.61,    250060.3,    250750.6,    251210.81,    251581.53,    251849.98,    252105.65,    252604.2,    253038.84,    253729.14,    254176.56,    254675.11,    255058.62,    255365.42,    255736.14,    separator,
    255054.59,    254686.0,    separator,
    238916.75,    239171.26,    separator,
    239391.07,    239738.13,    separator,
    239911.66,    240374.41,    separator,
    240362.84,    240744.61,    separator,
    241565.99,    242248.54,    separator,
    242017.17,    242641.88,    separator,
    242040.31,    242861.69,    separator,
    242965.8,    243301.3,    separator,
    243486.4,    243787.18,    separator,
    244168.95,    244481.31,    separator,
    245140.72,    245117.59,    separator,
    246008.38,    245684.45,    separator,
    246436.42,    246355.44,    separator,
    246922.31,    246899.17,    separator,
    248102.31,    247743.68,    separator,
    248588.2,    248588.2,    separator,
    249721.93,    249895.47,    separator,
    250462.33,    250682.14,    separator,
    251017.63,    251491.95,    separator,
    251364.69,    251966.27,    separator,
    251642.34,    252440.58,    separator,
    251827.44,    252822.35,    separator,
    252336.46,    253389.22,    separator,
    253030.59,    253921.38,    separator,
    253863.54,    254141.18,    separator,
    254742.76,    254488.25,    separator,
    208034.38,    208298.05,
        ], 
    dtype=np.double,
    )

    splines_y = np.array(
        [
    7240267.4,    7239902.8,    separator,
    7241749.9,    7241020.8,    separator,
    7225248.1,    7222477.6,    separator,
    7225150.9,    7222550.5,    separator,
    7242065.8,    7240947.9,    separator,
    7241920.0,    7241020.8,    separator,
    7244423.2,    7243524.0,    separator,
    7244107.3,    7243135.1,    separator,
    7243499.7,    7242260.2,    separator,
    7238882.1,    7238420.4,    separator,
    7237375.3,    7236937.9,    separator,
    7236816.4,    7235528.3,    separator,
    7236160.2,    7234702.0,    separator,
    7234677.7,    7234045.8,    separator,
    7232830.7,    7231712.7,    separator,
    7231761.3,    7230376.1,    separator,
    7228164.5,    7227484.0,    separator,
    7224130.2,    7226171.6,    separator,
    7226560.5,    7226730.6,    separator,
    7225369.6,    7223158.1,    separator,
    7225163.4,    7222344.2,    separator,
    7230278.8,    7227629.8,    separator,
    7230084.4,    7228553.3,    separator,
    7230643.4,    7229088.0,    separator,
    7226369.6,    7226322.0,    7226036.0,    7225940.7,    7225630.9,    7225082.8,    7224487.1,    7224463.3,    7224630.1,    7224606.2,    7224796.9,    7225202.0,    7225654.7,    7226274.3,    7227132.2,    7227990.0,    7228323.6,    7228466.6,    7229038.5,    7229967.9,    7230849.6,    7231445.3,    7232017.2,    7232898.9,    7233804.4,    7234447.8,    7234995.9,    7235401.0,    7235877.6,    7236258.8,    7237235.8,    7237879.2,    7238427.3,    7238808.6,    7239380.5,    7239904.7,    7240595.8,    7241048.6,    7241310.7,    7241215.4,    7241120.0,    7241477.5,    7242144.7,    7242835.8,    7243360.0,    7243622.1,    7243717.5,    7243860.4,    7244146.4,    7244313.2,    7244503.8,    7245099.6,    7245504.7,    7246410.2,    7247625.5,    7248006.8,    7248483.3,    7248936.1,    7249531.8,    7249960.8,    7250294.4,    7250580.3,    7250985.4,    7251485.9,    7252010.1,    7252510.5,    7253273.1,    7254869.6,    7255560.7,    7256227.9,    7256656.8,    7257300.2,    7257800.7,    7258777.7,    7259444.9,    7260159.8,    7260576.7,    7260653.4,    7260856.2,    7261185.1,    7261475.6,    7261665.4,    7261796.6,    7261974.6,    7262171.4,    7262536.9,    7262696.2,    7262836.7,    7263258.4,    7263417.7,    7263680.1,    7264036.2,    7264411.0,    7264898.3,    7265263.7,    7265451.1,    7265544.8,    7265507.4,    7265619.8,    7265694.8,    7265779.1,    7265938.4,    7265872.8,    7265732.2,    7265582.3,    7265385.5,    7265498.0,    7265891.5,    7266088.3,    7266463.2,    7266819.2,    7267240.9,    7267559.5,    7267925.0,    7268299.8,    7268871.4,    7269021.4,    7269152.5,    7269002.6,    7269293.1,    separator,
    7244374.6,    7243621.2,    separator,
    7244641.9,    7243718.4,    separator,
    7244982.2,    7243912.8,    separator,
    7245857.1,    7244885.0,    separator,
    7246877.8,    7245492.5,    separator,
    7247801.3,    7246950.7,    separator,
    7248651.9,    7247558.3,    separator,
    7248992.2,    7248068.7,    separator,
    7249526.8,    7248579.0,    separator,
    7250231.6,    7249429.6,    separator,
    7251155.1,    7250255.9,    separator,
    7251689.8,    7250523.3,    separator,
    7252273.1,    7251009.3,    separator,
    7252807.8,    7251592.6,    separator,
    7253521.9,    7252334.9,    separator,
    7254035.7,    7252884.1,    separator,
    7258199.2,    7257348.7,    separator,
    7254584.9,    7253521.9,    separator,
    7257596.8,    7256710.9,    separator,
    7256959.0,    7256108.6,    separator,
    7255311.3,    7254514.0,    separator,
    7256214.9,    7255417.6,    separator,
    7258713.0,    7257951.1,    separator,
    7259350.8,    7258659.8,    separator,
    7259882.3,    7259067.3,    separator,
    7260644.1,    7259740.5,    separator,
    7261157.9,    7260449.2,    separator,
    7261813.4,    7260856.7,    separator,
    7262203.2,    7261423.6,    separator,
    7224820.7,    7224820.7,    7224820.7,    7224653.9,    7224391.8,    7224082.0,    7223676.9,    7223414.8,    7223105.0,    7222795.2,    7222556.9,    7222461.6,    7222819.0,    7222771.4,    7222890.5,    7223081.2,    7223486.3,    7223796.0,    7223843.7,    7224034.3,    7224367.9,    7224963.7,    7225797.7,    7226965.4,    7227727.9,    7228490.4,    7229491.3,    7229634.2,    7229729.6,    7229777.2,    7230015.5,    7230015.5,    7229824.9,    7229586.6,    7229729.6,    7230468.3,    7231302.3,    7231945.7,    7232350.8,    7232493.8,    7233089.5,    7233780.6,    7234447.8,    7235162.7,    7235758.4,    7235996.7,    7236139.7,    7236497.1,    7236997.5,    7237140.5,    7237712.4,    7238141.4,    7238570.3,    7238951.6,    7239595.0,    7239952.4,    7240524.3,    7241310.7,    7241715.8,    7241763.4,    7241668.1,    7241525.1,    7242025.6,    7242573.6,    7243002.6,    7243312.4,    7243765.1,    7243812.8,    7244122.6,    7244027.2,    7244146.4,    7244337.0,    7244646.8,    7244694.5,    7244765.9,    7244885.1,    7245266.4,    7245623.8,    7246028.9,    7246481.7,    7247053.6,    7247363.4,    7247816.1,    7248364.2,    7248721.6,    7249317.4,    7249889.3,    7250151.4,    7250508.8,    7250866.3,    7251056.9,    7251295.2,    7251700.3,    7252010.1,    7252653.5,    7253273.1,    7253964.1,    7254464.5,    7254917.3,    7255393.9,    7255822.8,    7256418.5,    7257061.9,    7257586.2,    7257991.3,    7258277.2,    7258660.8,    7259082.9,    7259476.9,    7259856.8,    7260236.7,    7260701.1,    7261109.1,    7261432.8,    7261700.1,    7261869.0,    7262141.1,    7262371.2,    7262690.8,    7262831.4,    7263125.4,    7263330.0,    7263611.2,    7263969.1,    7263994.7,    7264109.7,    7264212.0,    7264570.0,    7264902.3,    7265081.3,    7265298.6,    7265541.5,    7265746.0,    7266129.5,    7266615.3,    7267024.4,    7267101.1,    7267024.4,    7266858.2,    7266615.3,    7266385.2,    7266359.6,    7266436.3,    7266500.2,    7266576.9,    7266576.9,    7266576.9,    7266666.4,    7266819.8,    7267088.3,    7267331.2,    7267778.6,    7268289.9,    7268967.4,    7269414.9,    7269529.9,    7269517.1,    7269427.7,    7269414.9,    7269491.6,    7269478.8,    separator,
    7269611.8,    7268800.9,    separator,
    7262491.9,    7261658.9,    separator,
    7262734.8,    7261844.0,    separator,
    7263000.9,    7262063.8,    separator,
    7263243.8,    7262341.5,    separator,
    7264261.9,    7263486.8,    separator,
    7264527.9,    7263995.8,    separator,
    7265037.0,    7264863.4,    separator,
    7265800.5,    7265152.7,    separator,
    7266298.0,    7265303.0,    separator,
    7266876.4,    7265360.9,    separator,
    7267281.3,    7265488.1,    separator,
    7266783.8,    7265696.4,    separator,
    7266633.5,    7265777.4,    separator,
    7266783.8,    7265615.4,    separator,
    7266795.4,    7265349.3,    separator,
    7266772.3,    7265210.5,    separator,
    7266922.7,    7265511.3,    separator,
    7266992.1,    7265950.9,    separator,
    7267165.6,    7266298.0,    separator,
    7267431.7,    7266702.9,    separator,
    7267801.9,    7267096.2,    separator,
    7268287.8,    7267558.9,    separator,
    7269005.0,    7268195.2,    separator,
    7269652.9,    7268634.8,    separator,
    7269803.3,    7268819.9,    separator,
    7269780.1,    7268935.6,    separator,
    7226763.7,    7224171.0,
        ], 
        dtype=np.double,
    )
    splines = GeometryList(splines_x, splines_y)

    curvilinear_parameters = CurvilinearParameters()
    curvilinear_parameters.n_refinement = 10
    curvilinear_parameters.m_refinement = 10

    mk.curvilinear_compute_transfinite_from_splines(splines, curvilinear_parameters)

    return mk

def create_mk_instance_with_a_rectangular_curvilinear_grid(num_columns=3, num_rows=3):
    r"""A local function for creating an instance of meshkernel with a rectangular curvilinear grid."""
    mk = MeshKernel()

    # Create an instance of MakeGridParameters and set the values
    make_grid_parameters = MakeGridParameters()
    make_grid_parameters.num_columns = num_columns
    make_grid_parameters.num_rows = num_rows
    make_grid_parameters.angle = 0.0
    make_grid_parameters.origin_x = 0.0
    make_grid_parameters.origin_y = 0.0
    make_grid_parameters.block_size_x = 10.0
    make_grid_parameters.block_size_y = 10.0

    mk.curvilinear_compute_rectangular_grid(make_grid_parameters)

    return mk

curvilinear_grid_transfinite = (
    create_mk_instance_with_curvilinear_grid_from_transfinite_method().curvilineargrid_get()
)

fig, ax = plt.subplots()
curvilinear_grid_transfinite.plot_edges(ax)
plt.show()

Thanks for the help :)