Cloud layer.

assets/imagebank.go

@@ -25,6 +25,7 @@ const (
 	Weapon        ImgAssetName = "Weapon"
 	WormDamaged   ImgAssetName = "WormDamaged"
 	Worm          ImgAssetName = "WormDefault"
+	Cloud         ImgAssetName = "Cloud"
 )
 
 var (
@@ -54,6 +55,8 @@ var (
 	worm_img []byte
 	//go:embed wormdefault.png
 	wormdefault_img []byte
+	//go:embed cloud.png
+	cloud_img []byte
 )
 
 func LoadImages() {
@@ -71,6 +74,7 @@ func LoadImages() {
 	ImageBank[Weapon] = LoadImagesFatal(weapon_img)
 	ImageBank[WormDamaged] = LoadImagesFatal(worm_img)
 	ImageBank[Worm] = LoadImagesFatal(wormdefault_img)
+	ImageBank[Cloud] = LoadImagesFatal(cloud_img)
 
 }
 

elements/cloud.go

@@ -0,0 +1,62 @@
+package elements
+
+import (
+	"math"
+	"mover/assets"
+	"mover/gamedata"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type Cloud struct {
+	Sprite   *ebiten.Image
+	position gamedata.Coordinates
+	angle    float64
+	velocity float64
+	Alpha    float64
+}
+
+func NewCloud(a gamedata.Area, angle, velocity float64) *Cloud {
+	c := &Cloud{
+		Sprite:   ebiten.NewImage(a.Width, a.Height),
+		angle:    angle, //rand.Float64() * (math.Pi * 2),
+		velocity: velocity,
+	}
+	return c
+}
+
+func (c *Cloud) Update() error {
+
+	c.position.X += c.velocity * math.Cos(c.angle)
+	c.position.Y += c.velocity * math.Sin(c.angle)
+	return nil
+}
+
+func (c *Cloud) Draw() {
+	c.Sprite.Clear()
+	//c.Sprite.Fill(color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
+	//c.Sprite.Fill(color.White)
+
+	cloudsprite := assets.ImageBank[assets.Cloud]
+
+	spritex := cloudsprite.Bounds().Dx()
+	spritey := cloudsprite.Bounds().Dy()
+
+	cloudx := c.Sprite.Bounds().Dx()
+	cloudy := c.Sprite.Bounds().Dy()
+
+	scalex := float64(cloudx) / float64(spritex)
+	scaley := float64(cloudy) / float64(spritey)
+
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Scale(scalex, scaley)
+	c.Sprite.DrawImage(assets.ImageBank[assets.Cloud], op)
+}
+
+func (c *Cloud) SetPosition(p gamedata.Coordinates) {
+	c.position = p
+}
+
+func (c *Cloud) GetPosition() gamedata.Coordinates {
+	return c.position
+}

elements/enemies.go

@@ -23,4 +23,5 @@ type Enemies interface {
 	ExplosionInitiated() bool
 	SetExplosionInitiated()
 	Health() int
+	MaxHealth() int
 }

elements/flyeye.go

@@ -163,5 +163,11 @@ func (f *FlyEye) SetExplosionInitiated() {
 }
 
 func (f *FlyEye) Health() int {
+	//health bars reserved for special enemies, flyeye is a one
+	//hitter so returning zero ensure no health bar is rendered
 	return 0
 }
+
+func (f *FlyEye) MaxHealth() int {
+	return 1
+}

elements/flygoblin.go

@@ -9,6 +9,10 @@ import (
 	"github.com/hajimehoshi/ebiten/v2"
 )
 
+const (
+	FG_MAXHEALTH = 100
+)
+
 type FlyGoblin struct {
 	Sprite         *ebiten.Image
 	Maks           *ebiten.Image
@@ -18,10 +22,8 @@ type FlyGoblin struct {
 	state          gamedata.EnemyState
 	cycle          int
 	health         int
-	dyingcount     int
 	damageduration int
 	right          bool
-	hit            bool
 	touched        bool
 	toggle         bool
 	sploding       bool
@@ -33,7 +35,7 @@ func NewFlyGoblin() *FlyGoblin {
 		Sprite:         ebiten.NewImage(96, 96),
 		Maks:           ebiten.NewImage(96, 96),
 		MaksDest:       ebiten.NewImage(96, 96),
-		health:         100,
+		health:         FG_MAXHEALTH,
 		damageduration: 0,
 	}
 	fg.Maks.Fill(color.White)
@@ -176,3 +178,7 @@ func (f *FlyGoblin) SetExplosionInitiated() {
 func (f *FlyGoblin) Health() int {
 	return f.health
 }
+
+func (f *FlyGoblin) MaxHealth() int {
+	return FG_MAXHEALTH
+}

gameelement/canvas.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"image/color"
 	"math"
+	"math/rand/v2"
 	"mover/assets"
 	"mover/elements"
 	"mover/fonts"
@@ -50,6 +51,7 @@ func NewCanvas(a gamedata.Area) *Canvas {
 		goblinspawned:     false,
 		score:             0,
 		runtime:           0.,
+		counter:           0,
 	}
 	c.eventmap = make(map[gamedata.GameEvent]func())
 	return c
@@ -70,9 +72,9 @@ func (c *Canvas) Update() error {
 		c.UpdateCharge()
 		c.UpdateEnemies()
 		c.CleanupTargets()
-
-	}
 		c.counter++
+	}
+
 	return nil
 }
 
@@ -105,7 +107,7 @@ func (c *Canvas) Draw(drawimg *ebiten.Image) {
 		if e.Health() > 0 {
 			x0 := e.GetPosition().X - float64(e.GetSprite().Bounds().Dx())
 			y0 := e.GetPosition().Y - 2/3.*float64(e.GetSprite().Bounds().Dy())
-			vector.DrawFilledRect(c.Sprite, float32(x0), float32(y0), 204, 12, color.Black, true)
+			vector.DrawFilledRect(c.Sprite, float32(x0), float32(y0), float32(e.MaxHealth())*2+4, 12, color.Black, true)
 			vector.DrawFilledRect(c.Sprite, float32(x0+2), float32(y0+2), float32(e.Health())*2, 8, color.RGBA{R: 0xff, G: 0x00, B: 0x00, A: 0xff}, true)
 		}
 	}
@@ -351,7 +353,8 @@ func (c *Canvas) UpdateEnemies() {
 		e.Update()
 	}
 	if !c.gameover {
-		/*
+
+		if !c.goblinspawned {
 			//spawn new enemies
 			f := 40000 / (c.counter + 1)
 
@@ -376,13 +379,15 @@ func (c *Canvas) UpdateEnemies() {
 				newenemy.SetTarget(c.hero.Pos)
 
 				c.enemies = append(c.enemies, newenemy)
-			}*/
+			}
+		}
 
-		if !c.goblinspawned {
+		if !c.goblinspawned && c.counter > 1200 {
 			newfg := elements.NewFlyGoblin()
 			c.enemies = append(c.enemies, newfg)
 			c.goblinspawned = true
 		}
+
 	}
 }
 

gameelement/cloudlayer.go

@@ -0,0 +1,109 @@
+package gameelement
+
+import (
+	"math"
+	"math/rand/v2"
+	"mover/elements"
+	"mover/gamedata"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type CloudLayer struct {
+	Sprite     *ebiten.Image
+	clouds     []*elements.Cloud
+	dimensions gamedata.Area
+	cycle      int
+}
+
+func NewCloudLayer(a gamedata.Area) *CloudLayer {
+	c := &CloudLayer{
+		Sprite:     ebiten.NewImage(a.Width, a.Height),
+		cycle:      0,
+		dimensions: a,
+	}
+	return c
+}
+
+func (c *CloudLayer) SetInputs(gamedata.GameInputs) {
+}
+
+func (c *CloudLayer) Update() error {
+	c.cycle++
+
+	for _, cloud := range c.clouds {
+		cloud.Update()
+
+		cpos := cloud.GetPosition()
+		if cpos.X > float64(c.dimensions.Width)+float64(cloud.Sprite.Bounds().Dx()) {
+			dx := -float64(cloud.Sprite.Bounds().Dx())
+			cloud.SetPosition(gamedata.Coordinates{X: dx, Y: cloud.GetPosition().Y})
+		}
+		if cpos.X < -float64(cloud.Sprite.Bounds().Dx()) {
+			dx := float64(c.dimensions.Width + cloud.Sprite.Bounds().Dx())
+			cloud.SetPosition(gamedata.Coordinates{X: dx, Y: cloud.GetPosition().Y})
+		}
+		if cpos.Y > float64(c.dimensions.Height)+float64(cloud.Sprite.Bounds().Dy()) {
+			dy := -float64(cloud.Sprite.Bounds().Dy())
+			cloud.SetPosition(gamedata.Coordinates{X: cloud.GetPosition().X, Y: dy})
+		}
+		if cpos.Y < -float64(cloud.Sprite.Bounds().Dy()) {
+			dy := float64(c.dimensions.Height + cloud.Sprite.Bounds().Dy())
+			cloud.SetPosition(gamedata.Coordinates{X: cloud.GetPosition().X, Y: dy})
+		}
+	}
+
+	return nil
+}
+
+func (c *CloudLayer) Draw(drawimg *ebiten.Image) {
+	c.Sprite.Clear()
+
+	for _, cloud := range c.clouds {
+		cloud.Draw()
+		op := &ebiten.DrawImageOptions{}
+		op.GeoM.Translate(cloud.GetPosition().X, cloud.GetPosition().Y)
+		op.ColorScale.ScaleAlpha(float32(cloud.Alpha))
+		c.Sprite.DrawImage(cloud.Sprite, op)
+	}
+
+	drawimg.DrawImage(c.Sprite, nil)
+}
+
+func (c *CloudLayer) Initialize() {
+
+	//cull previous cloud layer
+	for i := 0; i < len(c.clouds); i++ {
+		c.clouds[i] = nil
+	}
+	c.clouds = c.clouds[:0]
+
+	numclouds := rand.IntN(20)
+	angle := rand.Float64() * math.Pi * 2
+
+	for i := 0; i < numclouds; i++ {
+
+		a := gamedata.Area{
+			Height: rand.IntN(c.dimensions.Width/2) + 1,
+			Width:  rand.IntN(c.dimensions.Height/2) + 1,
+		}
+
+		velocity := rand.Float64() * 3
+		//velocity := 0.
+
+		newcloud := elements.NewCloud(a, angle, velocity)
+
+		newcloud.Alpha = rand.Float64() / 2
+
+		newcloud.SetPosition(gamedata.Coordinates{
+			X: rand.Float64() * float64(c.dimensions.Width),
+			Y: rand.Float64() * float64(c.dimensions.Height),
+		})
+
+		c.clouds = append(c.clouds, newcloud)
+	}
+}
+
+func (c *CloudLayer) RegisterEvents(e gamedata.GameEvent, f func()) {
+
+}

screens/primary.go

@@ -32,19 +32,28 @@ func NewPrimary() *Primary {
 		musicInitialized: false,
 	}
 
+	gamearea := gamedata.Area{Width: 640, Height: 480}
+
+	//initialize our layer map
 	p.gameevents = make(map[gamedata.GameEvent]bool)
 
-	p.elements = append(p.elements, gameelement.NewBackground(gamedata.Area{Width: 640, Height: 480}))
+	//create background layer
+	p.elements = append(p.elements, gameelement.NewBackground(gamearea))
 
-	canvas := gameelement.NewCanvas(gamedata.Area{Width: 640, Height: 480})
+	//create canvas (game) layer
+	canvas := gameelement.NewCanvas(gamearea)
 	canvas.RegisterEvents(gamedata.GameEventPlayerDeath, p.EventHandlerPlayerDeath)
 	canvas.RegisterEvents(gamedata.GameEventCharge, p.EventHandlerCharge)
 	canvas.RegisterEvents(gamedata.GameEventNewShot, p.EventHandlerNewShot)
 	canvas.RegisterEvents(gamedata.GameEventTargetHit, p.EventHandlerTargetHit)
 	canvas.RegisterEvents(gamedata.GameEventExplosion, p.EventHandlerExplosion)
-
 	p.elements = append(p.elements, canvas)
 
+	//create foreground cloud layer
+	clouds := gameelement.NewCloudLayer(gamearea)
+	clouds.Initialize()
+	p.elements = append(p.elements, clouds)
+
 	return p
 }