Fireballs and shadows.

elements/fireball.go

@@ -0,0 +1,118 @@
+package elements
+
+import (
+	"image"
+	"math"
+	"mover/assets"
+	"mover/gamedata"
+
+	"github.com/hajimehoshi/ebiten/v2"
+)
+
+type FireBall struct {
+	Sprite   *ebiten.Image
+	position gamedata.Coordinates
+	angle    float64
+	velocity float64
+	cycle    int
+}
+
+func NewFireBall(angle, velocity float64) *FireBall {
+	fb := &FireBall{
+		Sprite:   ebiten.NewImage(50, 50),
+		cycle:    0,
+		angle:    angle,
+		velocity: velocity,
+	}
+	return fb
+}
+
+func (fb *FireBall) Update() error {
+
+	fb.position.X += fb.velocity * math.Cos(fb.angle)
+	fb.position.Y += fb.velocity * math.Sin(fb.angle)
+
+	fb.cycle++
+	return nil
+}
+
+func (fb *FireBall) Draw() {
+	fb.Sprite.Clear()
+	//fb.Sprite.Fill(color.RGBA{R: 0xff, G: 0x00, B: 0x00, A: 0xff})
+
+	idx := fb.cycle / 8 % 5
+	x0 := idx * 50
+	x1 := x0 + 50
+	y0 := 0
+	y1 := 50
+
+	fb.Sprite.DrawImage(assets.ImageBank[assets.Fireball].SubImage(image.Rect(x0, y0, x1, y1)).(*ebiten.Image), nil)
+}
+
+func (fb *FireBall) GetPosition() gamedata.Coordinates {
+	return fb.position
+}
+
+func (fb *FireBall) SetPosition(pos gamedata.Coordinates) {
+	fb.position = pos
+}
+
+func (fb *FireBall) SetTarget(gamedata.Coordinates) {
+
+}
+
+func (fb *FireBall) GetAngle() float64 {
+	return fb.angle
+}
+
+func (fb *FireBall) GetVelocity() float64 {
+	return fb.velocity
+}
+
+func (fb *FireBall) GetSprite() *ebiten.Image {
+	return fb.Sprite
+}
+
+func (fb *FireBall) ClearTouched() {
+
+}
+
+func (fb *FireBall) ExplosionInitiated() bool {
+	return false
+}
+
+func (fb *FireBall) GetEnemyState() gamedata.EnemyState {
+	return gamedata.EnemyStateDefault
+}
+
+func (fb *FireBall) SetHit() {
+
+}
+
+func (fb *FireBall) SetToggle() {
+
+}
+
+func (fb *FireBall) IsToggled() bool {
+	return false
+}
+
+func (fb *FireBall) SetTouched() {
+
+}
+
+func (fb *FireBall) IsTouched() bool {
+	return false
+}
+
+func (fb *FireBall) SetExplosionInitiated() {
+
+}
+
+func (fb *FireBall) Health() int {
+	return 0
+}
+
+func (fb *FireBall) MaxHealth() int {
+	return 1
+}