2025-08-02 12:09:34 +08:00
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---
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title: DirectX12学习笔记（1）——DirectXMath库
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date: 2023-03-01 19:39:43
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excerpt:
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tags:
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rating: ⭐
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---
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DXM库利用**SIMD(单指令多数据)** 可以仅使用一条指令就同时完成多个数据的运算或处理。
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# 向量
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需要包含头文件
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```c++
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#include <DirectXMath.h>
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#include <DirectXPackedVector.h>
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```
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`DirectXPackedVector.h`的代码主要位于`DirectX::PackedVector`中。
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## Type
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- XMVECTOR
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- XMFLOAT2
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- XMFLOAT3
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- XMFLOAT4
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## Method
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- XMLoadFloat()：XMFLOAT =>XMVECTOR
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- XMStoreFloat()：XMVECTOR => XMFLOAT
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- XMVectorGet()
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- XMVectorSet()
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# 矩阵
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## Type
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- XMMATRIX：代表一个4x4矩阵
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## Method
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2025-10-01 11:50:31 +08:00
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- XMMAtrixSet
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# 杂项
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- XMVerifyCPUSupport()：检查是否支持SSE2指令集。需要#include <windows.h>
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- XMVector3NearEqual()：判断是否数值接近。
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