Transform

Transform — Aspose.3D FOSS for Java

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

Transform styrer positionen, orienteringen og skalaen af en Node i 3D-scenen. Hver node har præcis én Transform, tilgået via node.getTransform().

public class Transform extends A3DObject

Adgang til en nodes Transform

import com.aspose.threed.Scene;

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

Example

Example	Example	Example	Example	Example
`translation`	`Vector3`	`getTranslation()`	`setTranslation(Vector3)`	Positionsforskydning fra forældrenodens oprindelse. Standard `Vector3(0, 0, 0)`.
`scaling`	`Vector3`	`getScaling()`	`setScaling(Vector3)`	Ikke-uniform skalafaktor pr. akse. Standard `Vector3(1, 1, 1)`.
`rotation`	`Quaternion`	`getRotation()`	`setRotation(Quaternion)`	Rotation som en enhedsquaternion. Indstilling af dette opdaterer også Euler-vinkler.
`eulerAngles`	`Vector3`	`getEulerAngles()`	`setEulerAngles(Vector3)`	Rotation i grader som (X, Y, Z) Euler-vinkler. Indstilling af dette opdaterer også quaternion-rotationen.
`preRotation`	`Vector3`	`getPreRotation()`	`setPreRotation(Vector3)`	Euler-vinkler anvendt før hovedrotationen (bruges i FBX-rigs).
`postRotation`	`Vector3`	`getPostRotation()`	`setPostRotation(Vector3)`	Euler-vinkler anvendt efter hovedrotationen.
`geometricTranslation`	`Vector3`	`getGeometricTranslation()`	`setGeometricTranslation(Vector3)`	Kun lokal translation: påvirker geometri men ikke underordnede noder.
`geometricScaling`	`Vector3`	`getGeometricScaling()`	`setGeometricScaling(Vector3)`	Kun lokal skalering: påvirker geometri men ikke underordnede noder.
`geometricRotation`	`Vector3`	`getGeometricRotation()`	`setGeometricRotation(Vector3)`	Kun lokal rotation: påvirker geometri men ikke underordnede noder.
`transformMatrix`	`Matrix4`	`getTransformMatrix()`	`setTransformMatrix(Matrix4)`	Den fulde kombinerede 4x4 transformationsmatrix. Cachet; genberegnet når en komponent ændres. Indstilling af den dekomponerer tilbage til translation/skala/rotation.

Flydende setter-metoder

Alle settere returnerer this, hvilket muliggør kædekald:

Example	Example	Example
`setTranslation(double tx, double ty, double tz)`	`double, double, double`	Indstil position.
`setScale(double sx, double sy, double sz)`	`double, double, double`	Indstil skala.
`setEulerAngles(double rx, double ry, double rz)`	`double, double, double`	Indstil rotation i grader.
`setRotation(double rx, double ry, double rz, double rw)`	`double, double, double, double`	Indstil rotation som en quaternion (x, y, z, w).
`setPreRotation(double rx, double ry, double rz)`	`double, double, double`	Indstil forrotation i grader.
`setPostRotation(double rx, double ry, double rz)`	`double, double, double`	Indstil efterrotation i grader.
`setGeometricTranslation(double x, double y, double z)`	`double, double, double`	Indstil geometrisk translation.
`setGeometricScaling(double sx, double sy, double sz)`	`double, double, double`	Indstil geometrisk skala.
`setGeometricRotation(double rx, double ry, double rz)`	`double, double, double`	Indstil geometrisk rotation i grader.

Brugseksempler

Positionér en 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));

Roter med Euler-vinkler

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);

Roter med en 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

Skaler og positionér sammen

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);

Geometrisk offset (pivot-offset)

Geometriske transformationer flytter geometrien i forhold til nodeens pivot uden at påvirke underordnede noder; nyttigt til at centrere et mesh inden for sin 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);

Læs den kombinerede 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