Добавление документации по трёхмерным векторам и исправления

docs/vector3-eng.md

@@ -0,0 +1,31 @@
+# Three-dimensional vectors
+
+There are two types of 3D vectors in the library:
+- **BgcVector3FP32** - vector using single-precision floating-point numbers
+- **BgcVector3FP64** - vector using double-precision floating-point numbers
+
+Structure definitions:
+
+```c
+    typedef struct
+    {
+        float x1, x2, x3;
+    } BgcVector3FP32;
+
+    typedef struct
+    {
+        double x1, x2, x3;
+    } BgcVector3FP64;
+```
+
+## Functions
+
+| Funtions for BgcVector3FP32                                   | Funtions for BgcVector3FP64                                   |
+|:-------------------------------------------------------------:|:-------------------------------------------------------------:|
+| [bgc_vector3_reset_fp32](vector3/reset-eng.md)                | [bgc_vector3_reset_fp64](vector3/reset-eng.md)                |
+| [bgc_vector3_set_values_fp32](vector3/set-values-eng.md)      | [bgc_vector3_set_values_fp64](vector3/set-values-eng.md)      |
+| [bgc_vector3_copy_fp32](vector3/copy-eng.md)                  | [bgc_vector3_copy_fp64](vector3/copy-eng.md)                  |
+| [bgc_vector3_swap_fp32](vector3/swap-eng.md)                  | [bgc_vector3_swap_fp64](vector3/swap-eng.md)                  |
+
+
+[Documentation](intro-eng.md)