Refactor to use better interfaces and event callbacks.

screens/game.go

@@ -62,6 +62,7 @@ func NewGame() *Game {
 		musicInitialized: false,
 		boss:             elements.NewBoss(),
 	}
+
 	return g
 }
 
@@ -195,6 +196,14 @@ func (g *Game) Draw(screen *ebiten.Image) {
 			op.GeoM.Translate(-MOVER_WIDTH, -MOVER_HEIGHT)
 			op.GeoM.Translate(g.boss.Pos.X, g.boss.Pos.Y)
 			screen.DrawImage(g.boss.Sprite, op)
+
+			//text.Draw(screen, fmt.Sprintf("%d", g.boss.Health), fonts.SurviveFont.Arcade, 100, 50, color.White)
+
+			//boss health bar
+			x0 := g.boss.Pos.X - 96
+			y0 := g.boss.Pos.Y - 60
+			vector.DrawFilledRect(screen, float32(x0), float32(y0), 204, 12, color.Black, true)
+			vector.DrawFilledRect(screen, float32(x0+2), float32(y0+2), float32(g.boss.Health)*2, 8, color.RGBA{R: 0xff, G: 0x00, B: 0x00, A: 0xff}, true)
 		}
 
 		g.projectileMask.Clear()
@@ -280,14 +289,15 @@ func (g *Game) StepGame() {
 			//append new projectiles
 			g.AppendProjectiles()
 
-			//add new target with increasing frequency
-			g.SpawnEnemies()
-
 			//handle pulsewave updates
 			g.HandlePulseWaveUpdate()
 
-			if !g.boss.Spawned && g.counter > 600 {
-				g.SpawnBoss()
+			if !g.boss.Spawned {
+				//add new target with increasing frequency
+				g.SpawnEnemies()
+				if g.counter > 2000 {
+					g.SpawnBoss()
+				}
 			}
 
 		}
@@ -346,6 +356,20 @@ func (g *Game) HandlePulseWaveUpdate() {
 				//target.SetHit()
 			}
 		}
+
+		//check for boss
+		if g.boss.Spawned {
+			dx := g.boss.Pos.X - g.hero.Pos.X
+			dy := g.boss.Pos.Y - g.hero.Pos.Y
+			r := math.Sqrt(dx*dx + dy*dy)
+
+			if r >= g.explosion.Radius-40 && r <= g.explosion.Radius+40 &&
+				g.boss.Action <= elements.MoverActionDamaged && !g.boss.Touched {
+				g.boss.ToggleColor()
+				g.boss.Touched = true
+				//target.SetHit()
+			}
+		}
 	}
 }
 
@@ -393,10 +417,10 @@ func (g *Game) UpdateProjectiles() {
 			}
 		}
 
-		//boss check first, boundary check
+		//boss check: first, boundary check
 		if p.Pos.X >= g.boss.Pos.X-MOVER_WIDTH && p.Pos.X <= g.boss.Pos.X+MOVER_WIDTH &&
 			p.Pos.Y >= g.boss.Pos.Y-MOVER_HEIGHT && p.Pos.Y <= g.boss.Pos.Y+MOVER_HEIGHT &&
-			g.boss.Action < elements.MoverActionDying {
+			g.boss.Action == elements.MoverActionDamaged {
 			//fmt.Println("potential collision")
 
 			//the following computes total collisions in the image using a projectile mask that is a duplicate of what is on screen
@@ -476,6 +500,7 @@ func (g *Game) ResetTargetTouches() {
 	for _, t := range g.targets {
 		t.Touched = false
 	}
+	g.boss.Touched = false
 }
 
 func (g *Game) AppendProjectiles() {
@@ -636,6 +661,7 @@ func (g *Game) UpdateBoss() {
 	g.boss.Update()
 
 	if g.boss.Action == elements.MoverActionExploding && !g.boss.SplodeInitiated {
+		g.score += 10
 		player := audioContext.NewPlayerFromBytes(assets.Splode)
 		player.Play()
 		g.boss.SplodeInitiated = true
@@ -697,3 +723,7 @@ func (g *Game) HasCollided(mask *ebiten.Image, size int) bool {
 	}
 	return result
 }
+
+func (g *Game) SetInputs(gamedata.GameInputs) {
+
+}