Orbital geometry used in our simulation sample. Four angles define the geometry of the interaction: θ₁, θ₂, κ, and ω. The pericentric argument ω is defined as the angle between the line of nodes (intersection between the orbital plane and the galactic plane) and separation vector at pericenter (black line). The blue/red arrows display the spin orientation for the first/second galaxy. The blue/red curves represent the trajectory of the first/second galaxy in the orbital plane (x,y). The centers of the two galaxies also lie in the orbital plane. The darkest parts of the disks lie under the orbital plane.