---
title: kml_float_spline2d_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，双三次插值最小需要4个点。"
url: https://www.hikunpeng.com/document/detail/zh/hpchistory/hpckit/develop2400/kunpengaccel_kml_0495.html
sourcePath: /source/zh/hpchistory/hpckit/develop2400/kunpengaccel_kml_0495.html
indexId: 891e34f90d0b3581801187e4bc13ba9f96c67cafe0c15fadd5dd8117b70b01cf67
---
# kml_float_spline2d_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，双三次插值最小需要4个点。

#### 接口定义

size_t kml_float_spline2d_min_size(const kml_float_spline2d *interp)


#### 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 |


#### 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);
size_t min_size = kml_float_spline2d_min_size(spline);
```