---
title: kml_float_spline2d_set
description: "设zarr在网格点(i,j)处为z。"
url: https://www.hikunpeng.com/document/detail/zh/hpchistory/hpckit/develop2400/kunpengaccel_kml_0492.html
sourcePath: /source/zh/hpchistory/hpckit/develop2400/kunpengaccel_kml_0492.html
indexId: d0be18c9d43f3b717776002121e7767310901039be70da7b70e882ed2cf1f47667
---
# kml_float_spline2d_set

设zarr在网格点(i,j)处为z。

#### 接口定义

int kml_float_spline2d_set(const kml_float_spline2d *interp, float zarr[], const size_t i, const size_t j, const float z)


#### 参数

| 参数名 | 类型 | 描述 | 输入/输出 |
| --- | --- | --- | --- |
| interp | kml\_float\_spline2d \* | 插值对象指针。 | 输入 |
| zarr | float | 存有z值的数组。 | 输出 |
| i | size\_t | x方向的index。 | 输入 |
| j | size\_t | y方向的index。 | 输入 |
| z | float | 要改变的z值。 | 输入 |


#### 依赖

#include "kml_spline2d.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));
float x = 1;
float y = 1;
float z = 0;
kml_float_spline2d *spline = kml_float_spline2d_alloc(kml_float_interp2d_bicubic, xSize, ySize);
kml_float_spline2d_init(spline, xArr, yArr, zArr, xSize, ySize);
kml_float_spline2d_eval(interp, xArr, yArr, zArr, x, y, xacc, yacc, &z);
kml_float_spline2d_set(interp, zArr, x, y, z);
```