Transform

Transform — Aspose.3D FOSS for Java

Package: com.aspose.threed (aspose-3d-foss)

Transform controls the position, orientation, and scale of a Node in the 3D scene. Every node has exactly one Transform, accessed via node.getTransform().

public class Transform extends A3DObject

Accessing a Node’s Transform

import com.aspose.threed.Scene;

Scene scene = new Scene();
Node node = scene.getRootNode().createChildNode("box");
Transform t = node.getTransform();

Properties

Property	Type	Getter	Setter	Description
`translation`	`Vector3`	`getTranslation()`	`setTranslation(Vector3)`	Position offset from the parent node’s origin. Default `Vector3(0, 0, 0)`.
`scaling`	`Vector3`	`getScaling()`	`setScaling(Vector3)`	Non-uniform scale factor per axis. Default `Vector3(1, 1, 1)`.
`rotation`	`Quaternion`	`getRotation()`	`setRotation(Quaternion)`	Rotation as a unit quaternion. Setting this also updates Euler angles.
`eulerAngles`	`Vector3`	`getEulerAngles()`	`setEulerAngles(Vector3)`	Rotation in degrees as (X, Y, Z) Euler angles. Setting this also updates the quaternion rotation.
`preRotation`	`Vector3`	`getPreRotation()`	`setPreRotation(Vector3)`	Euler angles applied before the main rotation (used in FBX rigs).
`postRotation`	`Vector3`	`getPostRotation()`	`setPostRotation(Vector3)`	Euler angles applied after the main rotation.
`geometricTranslation`	`Vector3`	`getGeometricTranslation()`	`setGeometricTranslation(Vector3)`	Local-only translation: affects geometry but not child nodes.
`geometricScaling`	`Vector3`	`getGeometricScaling()`	`setGeometricScaling(Vector3)`	Local-only scale: affects geometry but not child nodes.
`geometricRotation`	`Vector3`	`getGeometricRotation()`	`setGeometricRotation(Vector3)`	Local-only rotation: affects geometry but not child nodes.
`transformMatrix`	`Matrix4`	`getTransformMatrix()`	`setTransformMatrix(Matrix4)`	The full combined 4x4 transformation matrix. Cached; recomputed when any component changes. Setting it decomposes back to translation/scaling/rotation.

Fluent Setter Methods

All setters return this, enabling chaining:

Method	Parameters	Description
`setTranslation(double tx, double ty, double tz)`	`double, double, double`	Set position.
`setScale(double sx, double sy, double sz)`	`double, double, double`	Set scale.
`setEulerAngles(double rx, double ry, double rz)`	`double, double, double`	Set rotation in degrees.
`setRotation(double rx, double ry, double rz, double rw)`	`double, double, double, double`	Set rotation as a quaternion (x, y, z, w).
`setPreRotation(double rx, double ry, double rz)`	`double, double, double`	Set pre-rotation in degrees.
`setPostRotation(double rx, double ry, double rz)`	`double, double, double`	Set post-rotation in degrees.
`setGeometricTranslation(double x, double y, double z)`	`double, double, double`	Set geometric translation.
`setGeometricScaling(double sx, double sy, double sz)`	`double, double, double`	Set geometric scale.
`setGeometricRotation(double rx, double ry, double rz)`	`double, double, double`	Set geometric rotation in degrees.

Usage Examples

Position a Node

import com.aspose.threed.Scene;
import com.aspose.threed.*;

Scene scene = new Scene();
Node node = scene.getRootNode().createChildNode("box");

// Using fluent setters
node.getTransform().setTranslation(5.0, 0.0, -3.0);

// Or via property setter
node.getTransform().setTranslation(new Vector3(5.0, 0.0, -3.0));

Rotate with Euler Angles

import com.aspose.threed.Scene;

Scene scene = new Scene();
Node node = scene.getRootNode().createChildNode("rotated");

// Rotate 45 degrees around Y axis
node.getTransform().setEulerAngles(0.0, 45.0, 0.0);

// Chain multiple operations
node.getTransform()
    .setTranslation(2.0, 0.0, 0.0)
    .setScale(2.0, 2.0, 2.0);

Rotate with a Quaternion

import com.aspose.threed.Scene;
import com.aspose.threed.*;
import com.aspose.threed.*;

Scene scene = new Scene();
Node node = scene.getRootNode().createChildNode("q-rotated");

// 90 degrees rotation around the Y axis
double halfAngle = Math.toRadians(45);   // half the total rotation
Quaternion q = new Quaternion(Math.cos(halfAngle), 0.0, Math.sin(halfAngle), 0.0);
node.getTransform().setRotation(q);

System.out.println("Euler: " + node.getTransform().getEulerAngles());   // synced automatically

Scale and Position Together

import com.aspose.threed.Scene;

Scene scene = new Scene();
Node node = scene.getRootNode().createChildNode("big-offset");

node.getTransform()
    .setTranslation(10.0, 0.0, 0.0)
    .setScale(3.0, 3.0, 3.0)
    .setEulerAngles(0.0, 90.0, 0.0);

Geometric Offset (Pivot Offset)

Geometric transforms shift the geometry relative to the node’s pivot without affecting child nodes; useful for centering a mesh within its node:

import com.aspose.threed.Scene;

Scene scene = new Scene();
Node node = scene.getRootNode().createChildNode("centered-mesh");

// Shift the mesh half a unit down so its base sits at y=0
node.getTransform().setGeometricTranslation(0.0, -0.5, 0.0);

Read the Combined Transform Matrix

import com.aspose.threed.Scene;
import com.aspose.threed.*;

Scene scene = new Scene();
Node node = scene.getRootNode().createChildNode("m");
node.getTransform().setTranslation(1.0, 2.0, 3.0);
node.getTransform().setEulerAngles(0.0, 45.0, 0.0);

Matrix4 m = node.getTransform().getTransformMatrix();
System.out.println(m.getClass().getName());   // com.aspose.threed.Matrix4