63 lines
1.6 KiB
Markdown
63 lines
1.6 KiB
Markdown
# Copying
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[Русская версия / Russian version](copy-rus.md)
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The copy functions allow you to copy the component values of one quaternion
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to another quaternion.
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Function for **BGC_FP32_Quaternion**:
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```c
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inline void bgc_fp32_quaternion_copy(BGC_FP32_Quaternion* const destination, const BGC_FP32_Quaternion* const source);
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```
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Function for **BGC_FP64_Quaternion**:
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```c
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inline void bgc_fp64_quaternion_copy(BGC_FP64_Quaternion* const destination, const BGC_FP64_Quaternion* const source);
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```
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Each of these functions is equivalent to the following lines of code:
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```c
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destination->s = source->s;
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destination->x = source->x;
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destination->y = source->y;
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destination->z = source->z;
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```
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The **source** and **destination** parameters must not be invalid pointers.
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The NULL (0) value is also considered invalid.
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The **source** parameter must be a pointer to a quaternion which components
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are to be copied. The coordinates of the **source** quaternion will
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not change after the function call.
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The **destination** parameter must be a pointer to a quaternion which components
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are to be changed. The coordinates of the **destination** quaternion will become
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the same as those of the **source** quaternion after the function call.
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Example of use:
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```c
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#include <stdio.h>
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#include <basic-geometry.h>
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int main()
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{
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BGC_FP32_Quaternion q1, q2;
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q1.s = 1.1f;
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q1.x = -2.0f;
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q1.y = 7.4f;
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q1.z = 1.8f;
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bgc_fp32_quaternion_copy(&q2, &q1);
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printf("s = %f, x = %f, y = %f, z = %f\n", q2.s, q2.x, q2.y, q2.z);
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return 0;
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}
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```
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[Documentation](../intro-eng.md) / [Quaternions](../quaternion-eng.md)
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