Add Glyph methods to convert to a glyph

pkg/atlas/objects.go

@@ -1,5 +1,7 @@
 package atlas
 
+import "log"
+
 // ObjectType represents an object type
 type ObjectType byte
 
@@ -18,6 +20,23 @@ const (
 	ObjectLargeRock = ObjectType(GlyphLargeRock)
 )
 
+// Glyph returns the glyph for this object type
+func (o ObjectType) Glyph() Glyph {
+	switch o {
+	case ObjectNone:
+		return GlyphNone
+	case ObjectRover:
+		return GlyphRover
+	case ObjectSmallRock:
+		return GlyphSmallRock
+	case ObjectLargeRock:
+		return GlyphLargeRock
+	}
+
+	log.Fatalf("Unknown object type: %c", o)
+	return GlyphNone
+}
+
 // Object represents an object in the world
 type Object struct {
 	// The type of the object