search

uji-ros-pkg / underwater_simulation

UWSim-NET, the Underwater Simulator
97 stars 64 forks source link

UWSim with ROS Indigo - in-water camera view is very 'noisey' #42

Closed ghost closed 9 years ago

ghost commented 9 years ago

Hi,

I have built UWSim and ROS Indigo from source. However when I run UWSim without using --disableShader the camera view looks terrible under the water. Outside the water it looks fine.

With --disableShader the surface of the water looks solid and the water appears invisible.

I wonder if anyone else has had any similar issues.

marioprats commented 9 years ago

Same here, not sure what the problem is...

ghost commented 9 years ago

Here is a screenshot of what I can see:

http://i61.tinypic.com/qrhu09.png

perezsolerj commented 9 years ago

Hi everyone,

This seems to be a driver-related issue. I guess new default linux driver supports some kind of shaders, but osgOcean godrays effects are causing trouble. So now instead of causing a segmentation fault it runs with this bug. I would recommend to update your drivers and see if it works (propietary drivers).

I made some tests in order to solve this. Running UWSim with --disableShaders solves the issue, after experimenting a little bit I realized that disabling shaders and godRays effects it's enough (Lines 116 and 137 on SceneBuilder).

So i run both configurations with --vv option and the only difference between them (after solving some conversion errors on default_shader) is:

glValidateProgram FAILED "ocean_surface" id=18 contextID=0 infolog: Texture unit 0 is accessed both as sampler2D and samplerCube

I guess if we solve this, we will solve the noisey behaviour with the default linux driver.

perezsolerj commented 9 years ago

Definitely this is a driver issue, using the correct driver solves the issue.