C 结构数组的 cython 内存视图

Cython 内存视图与结构数组的强大结合

c
struct Point {
    double x;
    double y;
    double z;
};
struct Point point_array[1000];

python
# cython: language_level=3
cdef struct Point:
    double x
    double y
    double z
# 定义一个包含 1000 个点的 C 结构数组
cdef Point[:] point_array =  malloc(sizeof(Point) * 1000)
# 初始化结构数组的数据
for i in range(1000):
    point_array[i].x = i
    point_array[i].y = i * 2
    point_array[i].z = i * 3
# 使用内存视图直接访问结构数组的数据
cdef double[:, :] coordinates = point_array
# 输出前十个点的坐标
for i in range(10):
    print(f"Point {i+1}: ({coordinates[i, 0]}, {coordinates[i, 1]}, {coordinates[i, 2]})")
# 释放内存
free(point_array)