Notice that the player never actually changes his x and y positions on screen. What I'm asking, to be precise, is how could I, in LWJGL through user input (say, the arrow keys), take the sprite sheet I have of my character's movement animations and render them in a [partially] fluid animation like above?
I've been perusing the internet for hours, and I've not found a surefire way to do this. I don't have any code as of yet; I'm more or less looking for a guideline or some pointers in the right direction concerning how I might tackle this.
And, to note, this'll be a rather large game, so I want to focus partially on speed and efficiency—that meaning that I don't want to dive into Slick2D and libGDX unless absolutely necessary.