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54 lines
1.2 KiB
Markdown
54 lines
1.2 KiB
Markdown
# Vector4
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4D 向量结构体，用于表示齐次坐标、颜色 (RGBA) 或 SIMD 操作。
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**头文件：** `#include <XCEngine/Math/Vector4.h>`
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**命名空间：** `XCEngine::Math`
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## 结构体定义
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```cpp
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struct Vector4 {
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float x = 0.0f;
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float y = 0.0f;
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float z = 0.0f;
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float w = 0.0f;
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};
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```
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## 构造函数
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- `Vector4(float x, float y, float z, float w)` - 从四个分量构造
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- `explicit Vector4(const Vector3& v, float w = 0.0f)` - 从 Vector3 构造
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## 静态工厂方法
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| 方法 | 返回值 | 描述 |
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|------|--------|------|
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| [Zero()](zero.md) | `Vector4` | 返回 (0, 0, 0, 0) |
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| [One()](one.md) | `Vector4` | 返回 (1, 1, 1, 1) |
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## 静态数学方法
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| 方法 | 返回值 | 描述 |
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|------|--------|------|
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| [Dot(a, b)](dot.md) | `float` | 4D 点积 |
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| [Project(vector, onNormal)](project.md) | `Vector4` | 投影 |
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## 实例方法
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| 方法 | 返回值 | 描述 |
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|------|--------|------|
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| [ToVector3()](tovector3.md) | `Vector3` | 转换到 Vector3（丢弃 w） |
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## 运算符
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- 算术: `+`, `-`, `*` (scalar)
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- 下标: `operator[]` (0=x, 1=y, 2=z, 3=w)
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- 比较: `==`, `!=`
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## 相关文档
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- [Math 模块总览](../math.md) - 返回 Math 模块总览
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