What does InverseTransformVectorNoScale do?

Development Programming & Scripting
1

what does InverseTransformVectorNoScale do?

I cant understand by its source code. what is logically meant to do?

2

Hi,

This function apply inverse transform without scaling the vector. For example, you have transform with scale 10 and rotation on 10 degrees around X-axis. In the result you will achieve vector rotated around X axis on -10 degrees rad.

Here is some example.

Transform transform(FRotator(90, 0, 0), FVector(0, 0, 0), FVector(10, 10, 10));

	FVector r1 = transform.TransformVector(FVector(1, 0, 0)); // 0 0 10   scale in 10 and rotate on 90 degrees
	FVector r2 = transform.InverseTransformVector(FVector(1, 0, 0)); // 0 0 -0.1  scale in 0.1 and rotate on -90 degrees
	FVector r3 = transform.InverseTransformVectorNoScale(FVector(1, 0, 0)); // 0 0 -1   no scale and rotate on -90 degrees

Best regards,

1 Like