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POHow to rotate an object around a custom pivot in JavaFX?
 

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  1. POHow to rotate an object around a custom pivot in JavaFX?
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    <p>I want to rotate an object round a custom pivot, which is its point, so I have such code:</p> <pre><code>private final EventHandler&lt;MouseEvent&gt; mouseEventHandler = new EventHandler&lt;MouseEvent&gt;() { @Override public void handle(MouseEvent mouseEvent) { if (mouseEvent.getEventType() == MouseEvent.MOUSE_PRESSED) { dragStartX = mouseEvent.getSceneX(); dragStartY = mouseEvent.getSceneY(); mousePosX = mouseEvent.getSceneX(); mousePosY = mouseEvent.getSceneY(); mouseOldX = mouseEvent.getSceneX(); mouseOldY = mouseEvent.getSceneY(); if (mouseEvent.isMiddleButtonDown()) { pivot = mouseEvent.getPickResult().getIntersectedPoint(); camForm1.rx.setPivotX(pivot.getX()); camForm1.ry.setPivotY(pivot.getY()); camForm1.rz.setPivotZ(pivot.getZ()); System.out.println(pivot); } } else if (mouseEvent.getEventType() == MouseEvent.MOUSE_DRAGGED) { double modifier = 1.0; double modifierFactor = 0.3; if (mouseEvent.isControlDown()) { modifier = 0.1; } if (mouseEvent.isShiftDown()) { modifier = 10.0; } mouseOldX = mousePosX; mouseOldY = mousePosY; mousePosX = mouseEvent.getSceneX(); mousePosY = mouseEvent.getSceneY(); mouseDeltaX = (mousePosX - mouseOldX); //*DELTA_MULTIPLIER; mouseDeltaY = (mousePosY - mouseOldY); //*DELTA_MULTIPLIER; double flip = -1.0; if (mouseEvent.isPrimaryButtonDown() &amp;&amp; mouseEvent.isSecondaryButtonDown()) { camForm2.t.setX(camForm2.t.getX() + flip * mouseDeltaX * modifierFactor * modifier * 0.3); // - camForm2.t.setY(camForm2.t.getY() + mouseDeltaY * modifierFactor * modifier * 0.3); // - yFlip* } else if (mouseEvent.isSecondaryButtonDown()) { camForm1.ry.setAngle(camForm1.ry.getAngle() - mouseDeltaX * modifierFactor * modifier * 2.0); // + yFlip* camForm1.rx.setAngle(camForm1.rx.getAngle() + flip * mouseDeltaY * modifierFactor * modifier * 2.0); // - } } } }; </code></pre> <p><code>camForm1</code> and <code>camForm2</code> are the examples of <code>XForm</code> class.</p> <pre><code> public class XForm extends Group { public enum RotateOrder { XYZ, XZY, YXZ, YZX, ZXY, ZYX } public Translate t = new Translate(); public Translate p = new Translate(); public Translate ip = new Translate(); public Rotate rx = new Rotate(0.0, 0.0, 0.0, 0.0, Rotate.X_AXIS); public Rotate ry = new Rotate(0.0, 0.0, 0.0, 0.0, Rotate.Y_AXIS); public Rotate rz = new Rotate(0.0, 0.0, 0.0, 0.0, Rotate.Z_AXIS); public Scale s = new Scale(); public XForm() { super(); getTransforms().addAll(t, rz, ry, rx, s); } ... } </code></pre> <p>But the rotation is around point O(0, 0, 0). What am I doing wrong?</p>
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