Step physics seems to not work properly

❓ Questions and Help

Hi, I’m following the tutorial at https://aihabitat.org/docs/habitat-sim/rigid-object-tutorial.html, but the ball don’t fall to the ground even if “step_physics” is properly called. It seems that sim.step_pyhsics is not actually simulating physics, and therefore the result is a ball still in mid-air in all the observations. Am I forgetting something? Thank you 😃 My environment: python 3.8 habitat_sim 0.1.6 installed with conda

[gianscarpe]

Hi @aclegg3, Thanks! I solved by build with this (the following code will build two wheels, both with and without display)

# Checkout the latest stable release                                                                                                                                                              
cd dev                                                                                                                                                                                            
git clone --branch stable https://github.com/facebookresearch/habitat-sim.git                                                                                                                     
cd habitat-sim                                                                                                                                                                                    
                                                                                                                                                                                                        
# We require python>=3.6 and cmake>=3.10                                                                                                                                                          
conda create -n habitat python=3.8 cmake=3.14.0                                                                                                                                                   
conda activate habitat                                                                                                                                                                            
pip install -r requirements.txt                                                                                                                                                                   
                                                                                                                                                                                                        
python setup.py bdist_wheel --with-cuda --bullet                                                                                                                                                  
python setup.py bdist_wheel --with-cuda --bullet --headless # Headless, for cluster     

[aclegg3]

I see. The “withbullet” build for habitat-nightly does not appear to be up-dating correctly at this time. You should in this case build from source or use the previous version tag (e.g. use -c aihabitat instead).

Edit: more specifically, headless build with bullet should be ok. However bullet build with display is not available on nightly.