The French were attacking from the West, which is the bottom on the picture below. They initially had to cross the river, which the Austrians elected to leave undefended fir the sake of making a quicker getaway. The first picture shows the action a few hours into the battle. The French have managed to finally get all their forces over the river and deploy them, but in the meantime the Austrians have managed to pull back a long way and are heading for the high ground to the East.
Picture 2 is a close-up of the front lines