image path helper functions

domain/level.go

@@ -2,6 +2,10 @@ package domain
 
 import "game/konstructor"
 
+const (
+	Level1Playground1 konstructor.PlaygroundID = "level_1_playground_1"
+)
+
 func (d *Domain) InitLevel() {
 	d.Levels = []konstructor.Level{
 		{
@@ -9,8 +13,9 @@ func (d *Domain) InitLevel() {
 			Name: "Level I.",
 			Playgrounds: []konstructor.Playground{
 				{
+					ID: Level1Playground1,
 					Render: konstructor.Render{
-						Image: "assets/images/playgrounds/level_1_playground_1.png",
+						Image: konstructor.GetPlaygroundImagePath(Level1Playground1),
 					},
 					Platforms: []konstructor.Platform{
 						{

domain/type.item.go

@@ -11,7 +11,7 @@ func (d *Domain) InitItemType() {
 		SwordItemType: {
 			ID: "sword",
 			Render: konstructor.Render{
-				Image: "assets/images/items/sword.png",
+				Image: konstructor.GetItemTypeImagePath(SwordItemType),
 			},
 		},
 	}

domain/type.npc.go

@@ -3,14 +3,14 @@ package domain
 import "game/konstructor"
 
 const (
-	TestNPCType konstructor.NPCTypeMapKey = "test"
+	TestNPCType konstructor.NPCTypeMapKey = "test_npc"
 )
 
 func (d *Domain) InitNPCType() {
 	d.NPCTypeMap = konstructor.NPCTypeMap{
 		TestNPCType: {
 			Render: konstructor.Render{
-				Image: "assets/images/npcs/test_npc.png",
+				Image: konstructor.GetNPCTypeImagePath(TestNPCType),
 			},
 		},
 	}

domain/type.platform.go

@@ -3,7 +3,7 @@ package domain
 import "game/konstructor"
 
 const (
-	TestPlatformType konstructor.PlatformTypeMapKey = "test"
+	TestPlatformType konstructor.PlatformTypeMapKey = "test_platform"
 )
 
 func (d *Domain) InitPlatformType() {
@@ -11,7 +11,7 @@ func (d *Domain) InitPlatformType() {
 		TestPlatformType: konstructor.PlatformType{
 			ID: "test_platform_type",
 			Render: konstructor.Render{
-				Image:  "assets/images/platforms/test_platform.png",
+				Image:  konstructor.GetPlatformTypeImagePath(TestPlatformType),
 				Width:  30,
 				Height: 30,
 			},

konstructor/layout.render.go

@@ -8,13 +8,18 @@ import (
 )
 
 type Render struct {
-	Image   string
-	Width   int
-	Height  int
-	Visible bool
+	Image       string
+	Width       int
+	Height      int
+	Visible     bool
+	cachedImage image.Image
 }
 
 func (ro *Render) GetImage() image.Image {
+	if ro.cachedImage != nil {
+		return ro.cachedImage
+	}
+
 	file, err := ioutil.ReadFile(ro.Image)
 	if err != nil {
 		log.Fatal(err)
@@ -24,5 +29,6 @@ func (ro *Render) GetImage() image.Image {
 	if err != nil {
 		log.Fatal(err)
 	}
+	ro.cachedImage = img
 	return img
 }

konstructor/object.go

@@ -0,0 +1,21 @@
+package konstructor
+
+type ObjectType string
+
+const (
+	ItemObjectType     ObjectType = "item"
+	NPCObjectType      ObjectType = "npc"
+	PlatformObjectType ObjectType = "platform"
+)
+
+type ObjectDirectoryMap map[ObjectType]string
+
+var ObjectDirectories = ObjectDirectoryMap{
+	ItemObjectType:     "items",
+	NPCObjectType:      "npcs",
+	PlatformObjectType: "platforms",
+}
+
+func GetObjectDirectory(name ObjectType) string {
+	return "assets/images/" + ObjectDirectories[name] + "/"
+}

konstructor/object.item.go

@@ -14,3 +14,7 @@ type Item struct {
 	Type     ItemType
 	Position Position
 }
+
+func GetItemTypeImagePath(name ItemTypeMapKey) string {
+	return GetObjectDirectory(ItemObjectType) + string(name) + ".png"
+}

konstructor/object.npc.go

@@ -14,3 +14,7 @@ type NPC struct {
 	Type     NPCType
 	Position Position
 }
+
+func GetNPCTypeImagePath(name NPCTypeMapKey) string {
+	return GetObjectDirectory(NPCObjectType) + string(name) + ".png"
+}

konstructor/object.platform.go

@@ -14,3 +14,7 @@ type Platform struct {
 	Type     PlatformType
 	Position Position
 }
+
+func GetPlatformTypeImagePath(name PlatformTypeMapKey) string {
+	return GetObjectDirectory(PlatformObjectType) + string(name) + ".png"
+}

konstructor/screen.playground.go

@@ -1,5 +1,7 @@
 package konstructor
 
+type PlaygroundID string
+
 type Position struct {
 	X int
 	Y int
@@ -7,6 +9,7 @@ type Position struct {
 }
 
 type Playground struct {
+	ID        PlaygroundID
 	Render    Render
 	Platforms []Platform
 	NPCs      []NPC
@@ -18,3 +21,7 @@ type Level struct {
 	Name        string
 	Playgrounds []Playground
 }
+
+func GetPlaygroundImagePath(name PlaygroundID) string {
+	return "assets/images/playgrounds/" + string(name) + ".png"
+}