Zombie and health bar

configuration/config.go

@@ -1,5 +1,7 @@
 package configuration
 
+import "math/rand"
+
 type Direction int
 
 const (
@@ -13,3 +15,8 @@ const (
 	NorthWest
 	PreviouslyHeld
 )
+
+func Random(min, max int) float64 {
+	result := min + rand.Intn(max-min)
+	return float64(result)
+}

hero/hero.go

@@ -6,6 +6,7 @@ import (
 	"gitlab.com/kbr4/9heroja/configuration"
 	"gitlab.com/kbr4/9heroja/resources"
 	"image"
+	"image/color"
 	"log"
 	"time"
 )
@@ -21,6 +22,7 @@ type Hero struct {
 	step      int
 	direction configuration.Direction
 	IsWalking bool
+	Health    int // Health as a percentage (0-100)
 }
 
 type spritePosition struct {
@@ -132,6 +134,35 @@ func (h *Hero) DrawHero(screen *ebiten.Image) {
 	//		float64((ny-1)*tileSize-floorMod(g.cameraY, tileSize)))
 
 	screen.DrawImage(heroImage.SubImage(image.Rect(p.x+1, p.y, p.x+resources.HeroTileSize, p.y+resources.HeroTileSize)).(*ebiten.Image), op)
+
+	// Drawing the dynamic health bar below the hero
+	maxHealthBarWidth := resources.HeroTileSize // Maximum width of the health bar (same as the character width)
+	healthBarHeight := 5                        // Height of the health bar
+	healthBarX := float64(screenWidth/2 - 16)   // Align with the hero
+	healthBarY := float64(screenHeight/2 + 20)  // Position below the hero
+
+	// Calculate the current width of the health bar based on the hero's health
+	currentHealthBarWidth := int(float64(maxHealthBarWidth) * (float64(h.Health) / 100.0))
+
+	// Determine health bar color based on health
+	var healthColor color.Color
+	switch {
+	case h.Health >= 70:
+		healthColor = color.RGBA{0, 255, 0, 255} // Green
+	case h.Health >= 30:
+		healthColor = color.RGBA{255, 165, 0, 255} // Orange
+	default:
+		healthColor = color.RGBA{255, 0, 0, 255} // Red
+	}
+
+	// Create health bar image with the current width
+	healthBarImg := ebiten.NewImage(currentHealthBarWidth, healthBarHeight)
+	healthBarImg.Fill(healthColor)
+	// Draw health bar
+	hbop := &ebiten.DrawImageOptions{}
+	hbop.GeoM.Translate(healthBarX, healthBarY)
+	screen.DrawImage(healthBarImg, hbop)
+
 }
 
 func init() {
@@ -149,6 +180,7 @@ func NewHero() *Hero {
 	hero := &Hero{
 		step:      0,
 		IsWalking: false,
+		Health:    33,
 	}
 
 	go func() {

main.go

@@ -7,6 +7,7 @@ import (
 	"gitlab.com/kbr4/9heroja/hero"
 	"gitlab.com/kbr4/9heroja/input"
 	"gitlab.com/kbr4/9heroja/terrain"
+	"gitlab.com/kbr4/9heroja/zombie"
 	_ "image/png"
 	"log"
 )
@@ -49,6 +50,7 @@ type Game struct {
 
 	hero    *hero.Hero
 	terrain *terrain.Terrain
+	zombies []*zombie.Zombie
 }
 
 func (g *Game) Update() error {
@@ -67,6 +69,11 @@ func (g *Game) Update() error {
 func (g *Game) Draw(screen *ebiten.Image) {
 	g.terrain.DrawTerrain(screen)
 	g.hero.DrawHero(screen)
+	for _, z := range g.zombies {
+		z.OffsetX = g.terrain.PositionX
+		z.OffsetY = g.terrain.PositionY
+		z.DrawZombie(screen)
+	}
 }
 
 func (g *Game) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) {
@@ -81,7 +88,21 @@ func init() {
 	GameInstance = &Game{}
 	GameInstance.control = &input.Keyboard{}
 	GameInstance.hero = hero.NewHero()
+	GameInstance.zombies = []*zombie.Zombie{zombie.NewZombie(), zombie.NewZombie(), zombie.NewZombie(), zombie.NewZombie(), zombie.NewZombie()}
+
+	// put zombies in random places on the screen but not too close to the hero or each other
+	for _, z := range GameInstance.zombies {
+		z.X = float64(configuration.Random(50, screenWidth-50))
+		z.Y = float64(configuration.Random(50, screenHeight-50))
+		for z.X > float64(screenWidth/2-64) && z.X < float64(screenWidth/2+64) && z.Y > float64(screenHeight/2-64) && z.Y < float64(screenHeight/2+64) {
+			z.X = float64(configuration.Random(0, screenWidth))
+			z.Y = float64(configuration.Random(0, screenHeight))
+		}
+		z.Walk()
+	}
+
 	GameInstance.terrain = terrain.NewTerrain()
+
 	GameInstance.hero.ChangeDirection(configuration.North)
 	GameInstance.terrain.ChangeDirection(configuration.North)
 	GameInstance.hero.Walk()

resources/constants.go

@@ -1,3 +1,4 @@
 package resources
 
 const HeroTileSize = 33
+const ZombieTileSize = 32

resources/embed.go

@@ -10,4 +10,7 @@ var (
 
 	//go:embed grass.png
 	Grass_png []byte
+
+	//go:embed zombie3.png
+	Zombie_png []byte
 )

terrain/terrain.go

@@ -15,16 +15,16 @@ var (
 )
 
 type Terrain struct {
-	positionX float64
-	positionY float64
+	PositionX float64
+	PositionY float64
 	direction configuration.Direction
 }
 
 func (t *Terrain) DrawTerrain(screen *ebiten.Image) {
 	screenWidth := screen.Bounds().Max.X
 	screenHeight := screen.Bounds().Max.Y
-	offsetX := int(t.positionX) % 64
-	offsetY := int(t.positionY) % 64
+	offsetX := int(t.PositionX) % 64
+	offsetY := int(t.PositionY) % 64
 	op := &ebiten.DrawImageOptions{}
 	for i := -1; i <= screenWidth/64+1; i++ {
 		for j := -1; j <= screenHeight/64+1; j++ {
@@ -47,23 +47,23 @@ func init() {
 
 func NewTerrain() *Terrain {
 	return &Terrain{
-		positionX: 0,
-		positionY: 0,
+		PositionX: 0,
+		PositionY: 0,
 	}
 }
 
 func (t *Terrain) Move() {
 	if slices.Contains([]configuration.Direction{configuration.North, configuration.NorthEast, configuration.NorthWest}, t.direction) {
-		t.positionY += 1
+		t.PositionY += 1
 	}
 	if slices.Contains([]configuration.Direction{configuration.South, configuration.SouthEast, configuration.SouthWest}, t.direction) {
-		t.positionY -= 1
+		t.PositionY -= 1
 	}
 	if slices.Contains([]configuration.Direction{configuration.East, configuration.NorthEast, configuration.SouthEast}, t.direction) {
-		t.positionX -= 1
+		t.PositionX -= 1
 	}
 	if slices.Contains([]configuration.Direction{configuration.West, configuration.NorthWest, configuration.SouthWest}, t.direction) {
-		t.positionX += 1
+		t.PositionX += 1
 	}
 
 }

zombie/zombie.go

@@ -0,0 +1,114 @@
+package zombie
+
+import (
+	"bytes"
+	"github.com/hajimehoshi/ebiten/v2"
+	"gitlab.com/kbr4/9heroja/configuration"
+	"gitlab.com/kbr4/9heroja/resources"
+	"image"
+	"log"
+	"time"
+)
+
+const WalkSpeedMs = 50
+
+var (
+	zombieImage *ebiten.Image
+	walkTicker  *time.Ticker
+)
+
+type Zombie struct {
+	step      int
+	direction configuration.Direction
+	IsWalking bool
+	X         float64
+	Y         float64
+	OffsetX   float64
+	OffsetY   float64
+}
+
+type spritePosition struct {
+	x int
+	y int
+}
+
+func (z *Zombie) DrawZombie(screen *ebiten.Image) {
+
+	// set movement positions to be hashmap of sprite positions for each direction
+
+	movementPositions := map[configuration.Direction][]spritePosition{}
+	movementPositions[configuration.North] = []spritePosition{
+		{0, 0},
+		{32, 0},
+		{64, 0},
+		{96, 0},
+	}
+	movementPositions[configuration.NorthEast] = movementPositions[configuration.North]
+	movementPositions[configuration.East] = movementPositions[configuration.North]
+	movementPositions[configuration.SouthEast] = movementPositions[configuration.North]
+	movementPositions[configuration.South] = movementPositions[configuration.North]
+	movementPositions[configuration.SouthWest] = movementPositions[configuration.North]
+	movementPositions[configuration.West] = movementPositions[configuration.North]
+	movementPositions[configuration.NorthWest] = movementPositions[configuration.North]
+
+	p := movementPositions[z.direction][z.step%4]
+
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Reset()
+	op.GeoM.Translate(z.X+z.OffsetX, z.Y+z.OffsetY)
+	op.GeoM.Scale(1, 1)
+
+	screen.DrawImage(zombieImage.SubImage(image.Rect(p.x+1, p.y, p.x+resources.ZombieTileSize, p.y+resources.HeroTileSize)).(*ebiten.Image), op)
+}
+
+func init() {
+	img, _, err := image.Decode(bytes.NewReader(resources.Zombie_png))
+	if err != nil {
+		log.Fatal(err)
+	}
+	zombieImage = ebiten.NewImageFromImage(img)
+	walkTicker = time.NewTicker(WalkSpeedMs * time.Millisecond)
+	// go routine that runs on every tick and increases step
+
+}
+
+func NewZombie() *Zombie {
+	hero := &Zombie{
+		step:      0,
+		IsWalking: false,
+	}
+
+	go func() {
+		for {
+			select {
+			case <-walkTicker.C:
+				hero.step++
+				if hero.step > 3 {
+					hero.step = 0
+				}
+			}
+		}
+	}()
+	return hero
+}
+
+func (z *Zombie) Walk() {
+
+	if !z.IsWalking {
+		walkTicker.Reset(WalkSpeedMs * time.Millisecond)
+		z.IsWalking = true
+	}
+
+}
+
+func (z *Zombie) ChangeDirection(d configuration.Direction) {
+	if d != configuration.PreviouslyHeld {
+		z.direction = d
+	}
+}
+
+func (z *Zombie) Stop() {
+	z.step = 2
+	walkTicker.Stop()
+	z.IsWalking = false
+}