---
title: kml_?_interp_min_size
description: "返回插值对象interp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/kunpenghpcs/hpckit/devg/kunpengaccel_kml_0513.html
sourcePath: /source/zh/kunpenghpcs/hpckit/devg/kunpengaccel_kml_0513.html
indexId: a89d3d346c59a8fc2d720006699c2d0ded016234b64597b2f3d7ddd220d8a1ec61
---
# kml_?_interp_min_size

返回插值对象interp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

unsigned int kml_float_interp_min_size(const kml_float_interp *interp)

unsigned int kml_float_interp_type_min_size(const kml_float_interp_type *T)

unsigned int kml_double_interp_min_size(const kml_double_interp *interp);

unsigned int kml_double_interp_type_min_size(const kml_double_interp_type *T)


#### 参数

| 参数名 | 类型 | 描述 | 输入/输出 |
| --- | --- | --- | --- |
| interp | const kml\_float\_interp\* / const kml\_double\_interp\* | 指向插值对象的指针。 | 输入 |


#### 依赖

#include "kipl.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_interp *interp = kml_float_interp_alloc(kml_float_interp_cspline, xSize);
size_t min_size = kml_float_interp_min_size(interp);
```