---
title: kml_float_spline_min_size
description: "返回插值对象spline或插值类型T所需要的最小的点的数量。例如，三次插值最小需要3个点。"
url: https://www.hikunpeng.com/document/detail/zh/kunpengaccel/math-lib/devg-kml/kunpengaccel_kml_0477.html
sourcePath: /source/zh/kunpengaccel/math-lib/devg-kml/kunpengaccel_kml_0477.html
indexId: ddc529da1f93abfd20af66b1c25177ad79e1aad7ea5fa32f8e3295502b7b28a968
---
# kml_float_spline_min_size

返回插值对象spline或插值类型T所需要的最小的点的数量。例如，三次插值最小需要3个点。

#### 接口定义

size_t kml_float_spline_min_size(const kml_float_spline *spline)


#### 参数

| 参数名 | 类型 | 描述 | 输入/输出 |
| --- | --- | --- | --- |
| spline | kml\_float\_spline\* | 插值对象指针。 | 输入 |


#### 依赖

#include "kml_spline.h"


#### 示例

```
const size_t xSize = 4;
float xArr[4] = {1,1.33,1.67,2};
float* yArr = (float*)malloc(xSize * sizeof(float));
float x = 1;
float y = 0;
kml_float_spline *spline = kml_float_spline_alloc(kml_float_interp_cspline, xSize);
size_t min_size = kml_float_spline_min_size(spline);
```