Bullet support

weapons/handgun.go

@@ -0,0 +1,134 @@
+package weapons
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
+	"gitlab.com/kbr4/9heroja/collision"
+	"gitlab.com/kbr4/9heroja/configuration"
+	"gitlab.com/kbr4/9heroja/resources"
+	"image"
+	"log"
+	"slices"
+	"time"
+)
+
+const BulletSpeedMs = 300
+
+var (
+	handgunBulletImage *ebiten.Image
+)
+
+type Handgun struct {
+	direction       configuration.Direction
+	IsFlying        bool
+	X               float64
+	Y               float64
+	OffsetX         float64
+	OffsetY         float64
+	IsDisintegrated bool
+	flyingTicker    *time.Ticker
+}
+
+func (h *Handgun) DrawHandgunBullet(screen *ebiten.Image) {
+
+	screenWidth := screen.Bounds().Max.X
+	screenHeight := screen.Bounds().Max.Y
+
+	if h.X > float64(screenWidth) || h.X < 0 || h.Y > float64(screenHeight) || h.Y < 0 {
+		h.Stop()
+	}
+
+	if !h.IsDisintegrated && h.IsFlying {
+		ebitenutil.DebugPrint(screen, fmt.Sprintf("\n\n\n\n\n\n\ndx: %f y:%f   isint: %t, flying: %t", h.X, h.Y, h.IsDisintegrated, h.IsFlying))
+		op := &ebiten.DrawImageOptions{}
+		op.GeoM.Reset()
+		op.GeoM.Translate(h.X+h.OffsetX, h.Y+h.OffsetY)
+		op.GeoM.Scale(1, 1)
+
+		screen.DrawImage(
+			handgunBulletImage,
+			op,
+		)
+	}
+}
+
+func init() {
+	img, _, err := image.Decode(bytes.NewReader(resources.Handgun_png))
+	if err != nil {
+		log.Fatal(err)
+	}
+	handgunBulletImage = ebiten.NewImageFromImage(img)
+
+}
+
+func NewHandgun() *Handgun {
+	handgun := &Handgun{
+		IsFlying:        false,
+		IsDisintegrated: false,
+	}
+	return handgun
+}
+
+func (h *Handgun) Fire(direction configuration.Direction) {
+	h.direction = direction
+	h.flyingTicker = time.NewTicker(BulletSpeedMs * time.Millisecond)
+	if !h.IsFlying {
+		//	h.flyingTicker.Reset(BulletSpeedMs * time.Millisecond)
+		h.IsFlying = true
+		h.IsDisintegrated = false
+	}
+
+}
+
+func (h *Handgun) Stop() {
+	h.IsFlying = false
+	h.IsDisintegrated = true
+	fmt.Println("Bullet stopped")
+}
+
+func (h *Handgun) CollisionShape() collision.Polygon {
+	if !h.IsDisintegrated {
+		return collision.Polygon{
+			Points: []collision.Point{
+				{X: h.X + h.OffsetX, Y: h.Y + h.OffsetY},
+				{X: h.X + h.OffsetX + 4, Y: h.Y + h.OffsetY},
+				{X: h.X + h.OffsetX + 4, Y: h.Y + h.OffsetY + 4},
+				{X: h.X + h.OffsetX, Y: h.Y + h.OffsetY + 4},
+			},
+		}
+	} else {
+		return collision.Polygon{
+			Points: []collision.Point{},
+		}
+	}
+}
+
+func (h *Handgun) CollisionObjectType() collision.ObjectType {
+	return collision.Bullet
+}
+
+func (h *Handgun) HandleCollisionEvent(other collision.Collidable) {
+	coll := other.CollisionObjectType()
+	switch coll {
+	case collision.Zombie:
+		fmt.Println("Bullet hit zombie")
+		h.Stop()
+	}
+}
+func (h *Handgun) Move() {
+	if slices.Contains([]configuration.Direction{configuration.North, configuration.NorthEast, configuration.NorthWest}, h.direction) {
+		h.Y -= 1
+	}
+	if slices.Contains([]configuration.Direction{configuration.South, configuration.SouthEast, configuration.SouthWest}, h.direction) {
+		h.Y += 1
+	}
+	if slices.Contains([]configuration.Direction{configuration.East, configuration.NorthEast, configuration.SouthEast}, h.direction) {
+		h.X += 1
+	}
+	if slices.Contains([]configuration.Direction{configuration.West, configuration.NorthWest, configuration.SouthWest}, h.direction) {
+		h.X -= 1
+	}
+
+}