63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
package level
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import "fmt"
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// PageType configures the bounds and wallpaper behavior of a Level.
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type PageType int
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// PageType values.
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const (
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// Unbounded means the map can grow freely in any direction.
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// - Only the repeat texture is used for the wallpaper.
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Unbounded PageType = iota
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// NoNegativeSpace means the map is bounded at the top left edges.
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// - Can't scroll or visit any pixels in negative X,Y coordinates.
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// - Wallpaper shows the Corner at 0,0
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// - Wallpaper repeats the Top along the Y=0 plane
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// - Wallpaper repeats the Left along the X=0 plane
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// - The repeat texture fills the rest of the level.
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NoNegativeSpace
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// Bounded is the same as NoNegativeSpace but the level is imposing a
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// maximum cap on the width and height of the level.
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// - Can't scroll below X,Y origin at 0,0
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// - Can't scroll past the bounded width and height of the level
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Bounded
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// Bordered is like Bounded except the corner textures are wrapped
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// around the other edges of the level too.
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// - The wallpaper hoz mirrors Left along the X=Width plane
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// - The wallpaper vert mirrors Top along the Y=Width plane
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// - The wallpaper 180 rotates the Corner for opposite corners
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Bordered
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// If you add new PageType, also update the two functions below.
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)
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// String converts the PageType to a string label.
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func (p PageType) String() string {
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switch p {
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case Unbounded:
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return "Unbounded"
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case NoNegativeSpace:
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return "NoNegativeSpace"
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case Bounded:
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return "Bounded"
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case Bordered:
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return "Bordered"
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}
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return fmt.Sprintf("PageType<%d>", p)
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}
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// PageTypeFromString returns a PageType from its string version.
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func PageTypeFromString(name string) (PageType, bool) {
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// The min and max PageType value.
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for i := Unbounded; i <= Bordered; i++ {
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if name == i.String() {
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return PageType(i), true
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}
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}
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return 0, false
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}
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