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XCEngine/docs/api/math/matrix4/multiplyvector.md
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Matrix4x4::MultiplyVector

Vector3 MultiplyVector(const Vector3& v) const

使用矩阵变换一个方向向量。会自动处理 w=0 的齐次坐标变换,适用于方向变换,不受平移影响。

参数:

  • v - 待变换的三维方向向量

返回: 变换后的三维方向向量

线程安全:

复杂度: O(1)

示例:

#include "XCEngine/Core/Math/Matrix4.h"
#include "XCEngine/Core/Math/Vector3.h"

using namespace XCEngine::Math;

Matrix4 rotation = Matrix4::RotationY(3.14159265f / 2.0f);
Vector3 direction(1.0f, 0.0f, 0.0f);
Vector3 rotated = rotation.MultiplyVector(direction);
// rotated = (0.0f, 0.0f, -1.0f)

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