Collision between two models

edit

Hi Ros users:

I have two models P3DX in Gazebo. One with Gaussian noise and the other one without Gaussian noise. I would like to put in the same point in Gazebo to see the track of them. But the problem is the collisions because when I put both of them in the same point they collide. So how can I remove the collision between the two models?

I try to remove the collision in one in .xacro:

    <!-- <collision>
        <origin xyz="0 0 0" rpy="0 0 0" />
        <geometry>
            <box size="0.225 0.165 0.10" />
        </geometry>
    </collision> -->

but the problem is that it has to collide with the ground_plane ... so i would like remove the colision only between the two models.

Any ideas?

Thanks!!!