doodle/level/page_type.go

package level

// PageType configures the bounds and wallpaper behavior of a Level.
type PageType int

// PageType values.
const (
	// Unbounded means the map can grow freely in any direction.
	// - Only the repeat texture is used for the wallpaper.
	Unbounded PageType = iota

	// NoNegativeSpace means the map is bounded at the top left edges.
	// - Can't scroll or visit any pixels in negative X,Y coordinates.
	// - Wallpaper shows the Corner at 0,0
	// - Wallpaper repeats the Top along the Y=0 plane
	// - Wallpaper repeats the Left along the X=0 plane
	// - The repeat texture fills the rest of the level.
	NoNegativeSpace

	// Bounded is the same as NoNegativeSpace but the level is imposing a
	// maximum cap on the width and height of the level.
	// - Can't scroll below X,Y origin at 0,0
	// - Can't scroll past the bounded width and height of the level
	Bounded

	// Bordered is like Bounded except the corner textures are wrapped
	// around the other edges of the level too.
	// - The wallpaper hoz mirrors Left along the X=Width plane
	// - The wallpaper vert mirrors Top along the Y=Width plane
	// - The wallpaper 180 rotates the Corner for opposite corners
	Bordered // TODO: to be implemented

	// FullPage treats the wallpaper image as a literal full scan of a page.
	// - The level boundaries are fixed to the wallpaper image's dimensions.
	// - Used to e.g. scan in real letterhead paper and draw a map on it.
	FullPage // TODO: to be implemented
)