Source Code TransformPosition

Development Programming & Scripting Blueprint
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1

Can someone tell me what lines of code TransformPosition runs in the background?

2

Why don’t you Look Into the source Code?

3

The source code does basically consist of other ue4 function, and there needs to be an easier explanation of it.

FORCEINLINE FVector FTransform::TransformPosition(const FVector& V) const
{
	DiagnosticCheckNaN_All();

	const VectorRegister InputVectorW0 = VectorLoadFloat3_W0(&V);

	//Transform using QST is following
	//QST(P) = Q.Rotate(S*P) + T where Q = quaternion, S = scale, T = translation
	
	//RotatedVec = Q.Rotate(Scale*V.X, Scale*V.Y, Scale*V.Z, 0.f)
	const VectorRegister ScaledVec = VectorMultiply(Scale3D, InputVectorW0);
	const VectorRegister RotatedVec = VectorQuaternionRotateVector(Rotation, ScaledVec);

	const VectorRegister TranslatedVec = VectorAdd(RotatedVec, Translation);

	FVector Result;
	VectorStoreFloat3(TranslatedVec, &Result);
	return Result;
}