---
name: "SoTransformVec3f"
section: "3iv"
platform: "linux"
package: "inventor-doc"
version: "2.1.6+ds-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SoTransformVec3f/3iv"
---

# SoTransformVec3f(3iv)

transforms a 3D vector by a 4x4 matrix

## NAME

SoTransformVec3f — transforms a 3D vector by a 4x4 matrix

## INHERITS FROM

SoBase \> SoFieldContainer \> SoEngine \> SoTransformVec3f

## SYNOPSIS

**#include \<Inventor/engines/SoTransformVec3f.h\>**

Inputs from class SoTransformVec3f:

**SoMFVec3f**	**vector**\
 **SoMFMatrix**	**matrix**

Outputs from class SoTransformVec3f:

**(SoMFVec3f)**	**point**\
 **(SoMFVec3f)**	**direction**\
 **(SoMFVec3f)**	**normalDirection**

Methods from class SoTransformVec3f:

	**SoTransformVec3f()**

Methods from class SoEngine:

**static SoType**	**getClassTypeId()**\
 **virtual int**	**getOutputs(SoEngineOutputList &list) const**\
 **SoEngineOutput \***	**getOutput(const SbName &outputName) const**\
 **SbBool**	**getOutputName(const SoEngineOutput \*output, SbName &outputName) const**\
 **SoEngine \***	**copy() const**\
 **static SoEngine \***	**getByName(const SbName &name)**\
 **static int**	**getByName(const SbName &name, SoEngineList &list)**

Methods from class SoFieldContainer:

**void**	**setToDefaults()**\
 **SbBool**	**hasDefaultValues() const**\
 **SbBool**	**fieldsAreEqual(const SoFieldContainer \*fc) const**\
 **void**	**copyFieldValues(const SoFieldContainer \*fc, SbBool copyConnections = FALSE)**\
 **SbBool**	**set(const char \*fieldDataString)**\
 **void**	**get(SbString &fieldDataString)**\
 **virtual int**	**getFields(SoFieldList &resultList) const**\
 **virtual SoField \***	**getField(const SbName &fieldName) const**\
 **SbBool**	**getFieldName(const SoField \*field, SbName &fieldName) const**\
 **SbBool**	**isNotifyEnabled() const**\
 **SbBool**	**enableNotify(SbBool flag)**

Methods from class SoBase:

**void**	**ref()**\
 **void**	**unref() const**\
 **void**	**unrefNoDelete() const**\
 **void**	**touch()**\
 **virtual SoType**	**getTypeId() const**\
 **SbBool**	**isOfType(SoType type) const**\
 **virtual void**	**setName(const SbName &name)**\
 **virtual SbName**	**getName() const**

## DESCRIPTION

**This engine takes as input a three dimensional floating-point vector and a transformation matrix. The vector is assumed to be a row vector.**

**The engine multiplies the vector by the matrix and returns the** **result in the output point**. The output **direction** contains the result when the matrix multiplication assumes the vector is a direction, and therefore ignores the translation part of the matrix. The output **normalDirection** contains the normalized **direction**

## INPUTS

**SoMFVec3f**	**vector**\
 Input row vector.

**SoMFMatrix**	**matrix**\
 Input transformation matrix.

## OUTPUTS

**(SoMFVec3f)**	**point**\
 Vector transformed by matrix.

**(SoMFVec3f)**	**direction**\
 Vector transformed by matrix, ignoring translation.

**(SoMFVec3f)**	**normalDirection**\
 Normalized direction.

## METHODS

	**SoTransformVec3f()**\
 Constructor

## FILE FORMAT/DEFAULTS

```
TransformVec3f {
vector	0 0 0
matrix	1 0 0 0
	0 1 0 0
	0 0 1 0
	0 0 0 1
}
```

## SEE ALSO

**SoEngineOutput**