implementar explosão de balas

main.go

@@ -2,13 +2,17 @@ package main
 
 import (
 	"fmt"
+	"math"
 	"strconv"
 
 	rl "github.com/gen2brain/raylib-go/raylib"
 )
 
+// diz para um inimigo como ele deve se mover
 type movementPattern func(*enemy)rl.Vector2
+// diz para um inimigo em que condições atirar. acionado pelo movementPattern
 type shootingPattern func(*enemy)
+// diz para uma bala como ela deve se mover.
 type bulletMovementPattern func(*bullet)rl.Vector2
 
 type hazard interface { // inimigos e projéteis
@@ -73,6 +77,36 @@ func (b *bullet) update(g *game, index int) {
     rl.DrawCircleV(b.pos, b.size, rl.Yellow)
 }
 
+func bulletExplosion(g *game, rate, amount int, bulletSpeed, size float32) shootingPattern {
+    return func(e *enemy) {
+        if g.frame % rate != 0 {
+            return
+        }
+
+        // radius := e.hitBoxRadius
+
+        var bullets []*bullet
+
+        for i := 0; i < amount; i++ {
+            angle := 2.0 * math.Pi * float64(i) / float64(amount)
+            cos := math.Cos(angle)
+            sin := math.Sin(angle)
+            direction := rl.Vector2{X: float32(cos), Y: float32(sin)}
+            direction = rl.Vector2Scale(direction, bulletSpeed)
+
+            bullets = append(bullets, &bullet{
+                speed: direction,
+                size: size,
+                dmg: 1,
+                enemy: true,
+                pos: e.pos,
+            })
+        }
+
+        g.bullets = append(g.bullets, bullets...)
+    }
+}
+
 func ShootAtPlayer(g *game, p *player, rate int, 
 bulletMoveSpeed float32) shootingPattern {
     return func(e *enemy) {
@@ -93,7 +127,6 @@ bulletMoveSpeed float32) shootingPattern {
     }
 }
 
-
 func burstShootAtPlayer(g *game, p *player, 
 rate int, bulletMoveSpeed float32) shootingPattern {
     flag := true
@@ -287,7 +320,7 @@ func (p *player) shoot(g *game){
         return
     }
 
-    if g.frame % 5 != 0 {
+    if g.frame % 3 != 0 {
         return
     }
 
@@ -368,8 +401,8 @@ func main() {
         },
         moveSpeed: 4,
         focusSpeedDecrease: 0.5,
-        bulletMoveSpeed: 13,
-        bulletSize: 8,
+        bulletMoveSpeed: 6,
+        bulletSize: 9,
         hitBoxRadius: 5,
     }
 
@@ -383,31 +416,22 @@ func main() {
             health: 100,
             hitBoxRadius: 20,
             move: horizonalPattern(state),
-            shoot: burstShootAtPlayer(state, &player, 8, 4),
+            shoot: bulletExplosion(state, 60, 20, 2, 11),
         },
         {
-            pos: rl.Vector2{X: 169, Y: 285},
-            health: 10,
-            hitBoxRadius:10,
+            pos: rl.Vector2{X: 100, Y: 100},
+            health: 100,
+            hitBoxRadius: 20,
             move: horizonalPattern(state),
-            shoot: ShootAtPlayer(state, &player, 16, 3),
+            shoot: burstShootAtPlayer(state, &player, 20, 4),
+        },
+        {
+            pos: rl.Vector2{X: 50, Y: 250},
+            health: 100,
+            hitBoxRadius: 20,
+            move: horizonalPattern(state),
+            shoot: bulletExplosion(state, 60, 20, 2, 11),
         },
-        // {
-        //     pos: rl.Vector2{X: 400, Y: 400},
-        //     health: 10,
-        //     hitBoxRadius:10,
-        //     bulletMoveSpeed: 6,
-        //     move: foobarPattern(state),
-        //     shoot: shootStraightDown(state),
-        // },
-        // {
-        //     pos: rl.Vector2{X: 200, Y: 200},
-        //     health: 10,
-        //     hitBoxRadius:10,
-        //     bulletMoveSpeed: 6,
-        //     move: shootStill(),
-        //     shoot: shootStraightDown(state),
-        // },
     }
 
     currectScore := 0
@@ -437,6 +461,8 @@ func main() {
         currectScore += (state.score - currectScore) / 11
 		rl.DrawText(strconv.Itoa(currectScore), state.arenaWidth, 0, 50, rl.White)
 
+		rl.DrawText(strconv.Itoa(len(state.bullets)), state.arenaWidth, 50, 50, rl.White)
+
 		rl.EndDrawing()
 	}