kml_?_spline_eval_deriv2

接口定义

int kml_float_spline_eval_deriv2_e(const kml_float_spline *spline, float x,

kml_spline_accel *a, float *d2)

float kml_float_spline_eval_deriv2(const kml_float_spline *spline, float x, kml_spline_accel *a)

int kml_double_spline_eval_deriv2_e(const kml_double_spline *spline, double x, kml_interp_accel *a, double *d2);

double kml_double_spline_eval_deriv2(const kml_double_spline *spline, double x, kml_interp_accel *a);

参数

依赖

#include "kipl.h"

示例

const size_t xMin = 4;
const size_t xMax = 2048;
const size_t xSize = 4;
const float xValLo = 1;
const float xValHi = 2;
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);
kml_interp_accel *xacc = kml_interp_accel_alloc();
kml_float_spline_init(spline, xSize, xArr, yArr);
y = kml_float_spline_eval_deriv2(spline, xArr, x, xacc);
kml_float_spline_free(spline);
kml_interp_accel_free(xacc);
free_if_not_null(xArr);