gazebosim/gz-common

Potential bug in Collada importer

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#245 opened on Sep 7, 2021

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buggraphicshelp wanted

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Description

Environment

  • OS Version: Ubuntu 18.04 and Ubuntu 20.04
  • Source or binary build? Source, compiled from main (e70a75d107ba86bb3d1a68690e1d33bfaa4cbb29)

Description

I have two almost exact .dae meshes. One of them loads and the other doesn't with the following error message:

[GUI] [Err] [Ogre2MeshFactory.cc:559] Cannot load mesh with zero sub-meshes
[GUI] [Err] [Ogre2MeshFactory.cc:125] Failed to get Ogre item for [file:///home/caguero/vrx2022_ws/src/vrx/vrx_gazebo/models/placard_2022/meshes/Placard.dae]
[GUI] [Err] [SceneManager.cc:382] Failed to load geometry for visual: visual

placard.zip

See the attached .zip containing two meshes. placard_2022.dae loads but Placard.dae doesn't load. I recommend to run meld to see the differences. The diff shows just a difference in scene id name and <instance_visual_scene url=.

Steps to reproduce

  1. Drag and drop placard_2022.dae into the scene. The mesh should load.
  2. Drag and drop Placard.dae into the scene. The mesh doesn't load.

Contributor guide

Research direction
Compare the two .dae files and trace the Collada importer code to find why Placard.dae fails with zero sub meshes.
Tech stack
cpp
Domain
computer graphics
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++Git
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75