# Copying

[Русская версия / Russian version](copy-rus.md)

The copy functions allow you to copy the coordinate values of one vector to another vector.

Function for **BGC_FP32_Vector2**:

```c
inline void bgc_fp32_vector2_copy(BGC_FP32_Vector2* const destination, const BGC_FP32_Vector2* const source);
```

Function for **BGC_FP64_Vector2**:

```c
inline void bgc_fp64_vector2_copy(BGC_FP64_Vector2* const destination, const BGC_FP64_Vector2* const source);
```

Each of these functions is equivalent to the following lines of code:

```c
destination->x = source->x;
destination->y = source->y;
```

The **source** and **destination** parameters must be valid pointers.
The NULL (0) value is also considered invalid.

The **source** parameter must be a pointer to a two-dimensional vector whose
coordinates are to be copied. The coordinates of the **source** vector will
not change after the function call.

The **destination** parameter must be a pointer to a two-dimensional vector
whose coordinates are to be changed. The coordinates of the **destination**
vector will become the same as those of the **source** vector after the function
call.

Example of use:

```c
#include <stdio.h>
#include <basic-geometry.h>

int main()
{
    BGC_FP32_Vector2 my_vector1, my_vector2;

    my_vector1.x = -2.0f;
    my_vector1.y = 7.4f;

    bgc_fp32_vector2_copy(&my_vector2, &my_vector1);

    printf("x = %f, y = %f\n", my_vector2.x, my_vector2.y);

    return 0;
}
```

[Documentation](../intro-eng.md) / [2D vectors](../vector2-eng.md)