Chapter 5: Tileset, Tilemap, and Camera

Technical requirements

Tileset - cutting tiles from a spritesheet

What is a tile?

What is a spritesheet?

Identify the floor tiles

Convert a tile cell into pixels

The Tileset struct

Cutting out one tile with GetTileRect

Tilemap - from a finite pattern to an infinite floor

A tilemap is a grid of choices

Store the tilemap in floor.map

Map text numbers to tileset cells

Parse the text file into Go data

Place tilemap cells in world space

Load the finite pattern during setup

Repeat the finite pattern forever

Draw only the visible cells

Camera - the moving window over the world

Why you need a camera

World space vs screen space

The Camera struct

Make the camera follow the player

Apply the camera offset

World - orchestrating the render pass

The World.Draw sequence

Prepare the draw surface

Queue drawables with the camera offset

Chapter 5 setup - file by file

cmd/main.go - program entry point

run.go - starting Ebitengine

game.go - creating the session

game_init.go - loading textures and creating the tilemap

player.go - player movement in world space

settings.go - shared configuration

Embedded assets

Optional extensions

Smooth camera following

Multiple tilemap layers

Different patterns

Running the chapter

Summary