60 lines
1.6 KiB
Markdown
60 lines
1.6 KiB
Markdown
# Swapping
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[Русская версия / Russian version](swap-rus.md)
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The exchange functions allow two quaternions of the same type to exchange
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component values.
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Function for **BGC_FP32_Quaternion**:
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```c
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inline void bgc_fp32_quaternion_swap(BGC_FP32_Quaternion* const quarternion1, BGC_FP32_Quaternion* const quarternion2);
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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_swap(BGC_FP64_Quaternion* const quarternion1, BGC_FP64_Quaternion* const quarternion2);
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```
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The **quarternion1** and **quarternion2** parameters must be valid pointers.
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The NULL (0) value is considered invalid.
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The quaternion **quarternion1** after calling this function will have the same
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component values the quaternion **quarternion2** had before calling
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the function.
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And the quaternion **quarternion2** after calling this function will have
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the same compnent values the quaternion **quarternion1** had before calling
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the function.
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### Example
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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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bgc_fp32_quaternion_set_values(&q1, 4, -2, 7, 5);
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bgc_fp32_quaternion_set_values(&q2, -5, 10, -1, -3);
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bgc_fp32_quaternion_swap(&q1, &q2);
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printf("Quaternion #1: s = %f, x = %f, y = %f, z = %f\n", q1.s, q1.x, q1.y, q1.z);
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printf("Quaternion #2: 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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The console output:
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```
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Quaternion #1: s = -5.000000, x = 10.000000, y = -1.000000, z = -3.000000
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Quaternion #2: s = 4.000000, x = -2.000000, y = 7.000000, z = 5.000000
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```
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[Documentation](../intro-eng.md) / [Quaternions](../quaternion-eng.md)
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