---
title: kml_?_spline2d_get
description: "返回数组zarr在网格(i, j)的值zij。"
url: https://www.hikunpeng.com/document/detail/zh/kunpenghpcs/hpckit/devg/kunpengaccel_kml_0535.html
sourcePath: /source/zh/kunpenghpcs/hpckit/devg/kunpengaccel_kml_0535.html
indexId: e4bf25094a67f81811d9479e6fd167bcaf3770fed4d1eec58b606d26431d7f4461
---
# kml_?_spline2d_get

返回数组zarr在网格(i, j)的值zij。

#### 接口定义

float kml_float_spline2d_get(const kml_float_spline2d *spline, const float zarr[], const size_t i, const size_t j)

double kml_double_spline2d_get(const kml_double_spline2d *spline, const double zarr[], const size_t i, const size_t j);


#### 参数

| 参数名 | 类型 | 描述 | 输入/输出 |
| --- | --- | --- | --- |
| spline | const kml\_float\_spline2d\* / const kml\_double\_spline2d\* | 指向插值对象的指针。 | 输入 |
| zarr | float类型数组 / double类型数组 | 存有z值的数组。 | 输入 |
| i | size\_t | x方向的index。 | 输入 |
| j | size\_t | y方向的index。 | 输入 |


#### 依赖

#include "kipl.h"


#### 示例

```
const size_t xSize = 4;
const size_t ySize = 4;
float xArr[4] = {1,1.33,1.67,2};
float yArr[4] = {1,1.33,1.67,2};
float* zArr = (float*)malloc(xSize * ySize * sizeof(float));
size_t x = 1;
size_t y = 1;
kml_float_spline2d *spline = kml_float_spline2d_alloc(kml_float_interp2d_bicubic, xSize, ySize);
kml_float_spline2d_init(spline, xArr, yArr, zArr, xSize, ySize);
z = kml_float_spline2d_get(spline, zArr, x, y);
```