Move glyph definitions into a central type

pkg/atlas/atlas.go

@@ -9,16 +9,16 @@ type Tile byte
 
 const (
 	// TileNone is a keyword for nothing
-	TileNone = Tile(0)
+	TileNone = Tile(GlyphNone)
 
 	// TileRock is solid rock ground
-	TileRock = Tile('-')
+	TileRock = Tile(GlyphRock)
 
 	// TileGravel is loose rocks
-	TileGravel = Tile(':')
+	TileGravel = Tile(GlyphGravel)
 
 	// TileSand is sand
-	TileSand = Tile('~')
+	TileSand = Tile(GlyphSand)
 )
 
 // Atlas represents a 2D world atlas of tiles and objects

pkg/atlas/glyph.go

@@ -0,0 +1,27 @@
+package atlas
+
+// Glyph represents the text representation of something in the game
+type Glyph byte
+
+const (
+	// GlyphNone is a keyword for nothing
+	GlyphNone = Glyph(0)
+
+	// GlyphRock is solid rock ground
+	GlyphRock = Glyph('-')
+
+	// GlyphGravel is loose rocks
+	GlyphGravel = Glyph(':')
+
+	// GlyphSand is sand
+	GlyphSand = Glyph('~')
+
+	// GlyphRover represents a live rover
+	GlyphRover = Glyph('R')
+
+	// GlyphSmallRock is a small stashable rock
+	GlyphSmallRock = Glyph('o')
+
+	// GlyphLargeRock is a large blocking rock
+	GlyphLargeRock = Glyph('O')
+)

pkg/atlas/objects.go

@@ -6,13 +6,13 @@ type Type byte
 // Types of objects
 const (
 	// ObjectNone represents no object at all
-	ObjectNone = Type(0)
+	ObjectNone = Type(GlyphNone)
 
 	// ObjectRover represents a live rover
-	ObjectRover = Type('R')
+	ObjectRover = Type(GlyphRover)
 
 	// ObjectSmallRock is a small stashable rock
-	ObjectSmallRock = Type('o')
+	ObjectSmallRock = Type(GlyphSmallRock)
 
 	// ObjectLargeRock is a large blocking rock
 	ObjectLargeRock = Type('O')