part 2 4/8

main.go

@@ -20,13 +20,20 @@ func main() {
 
 		// Our initial variables.
 		player := entity.NewEntity(screen.Columns/2, screen.Rows/2, '@', goro.Style{Foreground: goro.ColorWhite})
+			npc := entity.NewEntity(screen.Columns/2-5, screen. Rows/2, '@', goro.Style{Foreground: goro.ColorYellow})
+			
+			entities := []*entity.Entity{
+				player,
+				npc,
+			}
+			
+
 
 		// The game loop.
 		for {
 			// Draw screen.
-			screen.DrawRune(player.X, player.Y, player.Rune, player.Style)
+			DrawAll(screen, entities)
-			screen.Flush()
+			ClearAll(screen, entities)
-			screen.DrawRune(player.X, player.Y, ' ', goro.Style{})
 			// Handle events.
 			switch event := screen.WaitEvent().(type) {
 			case goro.EventKey:

render.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"github.com/kettek/goro"
+
+	"steel/entity"
+)
+// DrawAll draws all entities to the screen and flushes it.
+func DrawAll(screen *goro.Screen, entities[]*entity.Entity) {
+	for _, entity := range entities {
+		DrawEntity(screen, entity)
+	}
+	screen.Flush()
+}
+// ClearAll clears all entities from the screen.
+func ClearAll(screen *goro.Screen, entities[]*entity.Entity) {
+	for _, entity := range entities {
+	ClearEntity(screen, entity)
+}
+}
+// DrawEntity draws a given entity to the screen.
+func DrawEntity(screen *goro.Screen, e*entity.Entity) {
+	screen.DrawRune(e.X, e.Y, e.Rune, e.Style)
+}
+// ClearEntity clears a given entity from the screen.
+func ClearEntity(screen *goro.Screen, e*entity.Entity) {
+	screen.DrawRune(e.X, e.Y, ' ', goro.Style{})
+}