jMonkeyEngine / jMonkeyEngine/sdk
Mouse Picking sometimes leads to a NPE
Open
Nobody has claimed this yet.
SceneComposer
- Dominant language
- Java
- Stars
- 348
- Forks
- 104
- Avg merge
- 4d 13h
- Merged PRs (30d)
- 3
Description
I don't know what I did, I just tried to use the Scene Composer with this lousy touchpad and then... bam!
java.lang.NullPointerException
at com.jme3.math.Vector3f.subtract(Vector3f.java:683)
at com.jme3.gde.scenecomposer.tools.PickManager.getTranslation(PickManager.java:176)
at com.jme3.gde.scenecomposer.tools.PickManager.getTranslation(PickManager.java:186)
at com.jme3.gde.scenecomposer.tools.shortcuts.MoveShortcut.mouseMoved(MoveShortcut.java:160)
at com.jme3.gde.scenecomposer.SceneComposerToolController.doEditToolMoved(SceneComposerToolController.java:218)
at com.jme3.gde.scenecomposer.ComposerCameraController.checkMoved(ComposerCameraController.java:105)
at com.jme3.gde.core.scene.controller.AbstractCameraController.update(AbstractCameraController.java:514)
It doesn't know the end position
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start in jme3-gde/scenecomposer/tools/PickManager.java at getTranslation lines 176 and 186, then trace the call from MoveShortcut.mouseMoved. Reproduce mouse picking in the Scene Composer with the touchpad scenario described and inspect how the missing end position reaches Vector3f.subtract. Done means the interaction no longer produces this NullPointerException when the end position is unavailable.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- desktop, devtools
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100