part 2, 2/8

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "go.formatTool": "goimports"
+}

entity/entity.go

@@ -0,0 +1,25 @@
+package entity
+
+import (
+	"github.com/kettek/goro"
+)
+// Entity is a type that represents an active entity in the world.
+type Entity struct {
+	X, Y int
+	Rune rune
+	Style goro.Style
+}
+// Move moves the entity by a given amount.
+func (e *Entity) Move(x, y int) {
+	e.X += x
+	e.Y += y
+}
+// NewEntity returns a pointer to a newly created Entity.
+func NewEntity(x int, y int, r rune, s goro.Style) *Entity {
+	return &Entity{
+		X:	x,
+		Y:	y,
+		Rune:	r,
+		Style:	s,
+	}
+}

go.mod

@@ -2,4 +2,7 @@ module steel
 
 go 1.12
 
-require github.com/kettek/goro v0.0.0-20190627030747-34501f248e64
+require (
+	github.com/kettek/goro v0.0.0-20190628090227-a35769c6cfe8
+	golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb // indirect
+)

go.sum

@@ -21,6 +21,8 @@ github.com/jfreymuth/oggvorbis v1.0.0/go.mod h1:abe6F9QRjuU9l+2jek3gj46lu40N4qlY
 github.com/jfreymuth/vorbis v1.0.0/go.mod h1:8zy3lUAm9K/rJJk223RKy6vjCZTWC61NA2QD06bfOE0=
 github.com/kettek/goro v0.0.0-20190627030747-34501f248e64 h1:pgAPlM6qutPnrkIDqlR1Rne1O60HsVQDE8tkKCZ1dJI=
 github.com/kettek/goro v0.0.0-20190627030747-34501f248e64/go.mod h1:wwgugDvR3Lhzz0hvCpjEFbu12RmCvkLDDYSzM3ILeww=
+github.com/kettek/goro v0.0.0-20190628090227-a35769c6cfe8 h1:cRIFgXj8H9M6ZggN/jFaAGpJchSylj/ruF+ZqKb9JTY=
+github.com/kettek/goro v0.0.0-20190628090227-a35769c6cfe8/go.mod h1:wwgugDvR3Lhzz0hvCpjEFbu12RmCvkLDDYSzM3ILeww=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
@@ -36,7 +38,10 @@ golang.org/x/mobile v0.0.0-20180806140643-507816974b79/go.mod h1:z+o9i4GpDbdi3rU
 golang.org/x/mobile v0.0.0-20190127143845-a42111704963/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20181228144115-9a3f9b0469bb/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190203050204-7ae0202eb74c h1:YeMXU0KQqExdpG959DFhAhfpY8myIsnfqj8lhNFRzzE=
 golang.org/x/sys v0.0.0-20190203050204-7ae0202eb74c/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb h1:fgwFCsaw9buMuxNd6+DQfAuSFqbNiQZpcgJQAgJsK6k=
+golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20190202235157-7414d4c1f71c/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

main.go

@@ -4,6 +4,8 @@ import (
 	"log"
 
 	"github.com/kettek/goro"
+
+	"steel/entity"
 )
 
 func main() {
@@ -17,24 +19,20 @@ func main() {
 		screen.SetSize(60, 14)
 
 		// Our initial variables.
-		playerX, playerY := screen.Columns/2, screen.Rows/2
+		player := entity.NewEntity(screen.Columns/2, screen.Rows/2, '@', goro.Style{Foreground: goro.ColorWhite})
 
 		// The game loop.
 		for {
 			// Draw screen.
-			screen.DrawRune(playerX, playerY, '@', goro.Style{
+			screen.DrawRune(player.X, player.Y, player.Rune, player.Style)
-				Foreground: goro.ColorRed,
-			})
 			screen.Flush()
-			screen.DrawRune(playerX, playerY, ' ', goro.Style{})
+			screen.DrawRune(player.X, player.Y, ' ', goro.Style{})
-
 			// Handle events.
 			switch event := screen.WaitEvent().(type) {
 			case goro.EventKey:
 				switch action := handleKeyEvent(event).(type) {
 				case ActionMove:
-					playerX += action.X
+					player.Move(action.X, action.Y)
-					playerY += action.Y
 				case ActionQuit:
 					goro.Quit()
 				}