poder slow motion

main.go

@@ -23,10 +23,11 @@ type game struct {
     arenaWidth int32
     arenaHeight int32
     interfaceWidth int32
-    frame int
+    frame float32
     enemies []*enemy
     bullets []*bullet
     score int
+    gameSpeed float32 // 1 = velocidade normal
 }
 
 type bullet struct {
@@ -67,7 +68,7 @@ func (g *game) removeBullet(index int) {
 }
 
 func (b *bullet) update(g *game, index int) {
-    b.pos = rl.Vector2Add(b.pos, b.speed)
+    b.pos = rl.Vector2Add(b.pos, rl.Vector2Scale(b.speed, g.gameSpeed))
 
     if !g.insideArena(b.pos) {
         g.removeBullet(index)
@@ -79,7 +80,7 @@ func (b *bullet) update(g *game, index int) {
 
 func bulletExplosion(g *game, rate, amount int, bulletSpeed, size float32) shootingPattern {
     return func(e *enemy) {
-        if g.frame % rate != 0 {
+        if int(g.frame) % rate != 0 {
             return
         }
 
@@ -110,7 +111,7 @@ func bulletExplosion(g *game, rate, amount int, bulletSpeed, size float32) shoot
 func ShootAtPlayer(g *game, p *player, rate int, 
 bulletMoveSpeed float32) shootingPattern {
     return func(e *enemy) {
-        if g.frame % rate != 0 {
+        if int(g.frame) % rate != 0 {
             return
         }
         direction := rl.Vector2Subtract(p.pos, e.pos)
@@ -131,7 +132,7 @@ func burstShootAtPlayer(g *game, p *player,
 rate int, bulletMoveSpeed float32) shootingPattern {
     flag := true
     return func(e *enemy) {
-        if g.frame % 100 == 0 {
+        if int(g.frame) % 100 == 0 {
             flag = !flag
         }
 
@@ -139,7 +140,7 @@ rate int, bulletMoveSpeed float32) shootingPattern {
             return
         }
 
-        if g.frame % rate != 0 {
+        if int(g.frame) % rate != 0 {
             return
         }
 
@@ -159,7 +160,7 @@ rate int, bulletMoveSpeed float32) shootingPattern {
 
 func shootStraightDown(g *game) shootingPattern {
     return func(e *enemy) {
-        if g.frame % 10 != 0 {
+        if int(g.frame) % 10 != 0 {
             return
         }
         g.bullets = append(g.bullets, &bullet{
@@ -175,7 +176,7 @@ func shootStraightDown(g *game) shootingPattern {
 func shootStill() movementPattern {
     return func(e *enemy) rl.Vector2 { 
         e.shoot(e)
-        return e.pos 
+        return rl.Vector2{X: 0, Y: 0} 
     }
 }
 
@@ -183,56 +184,52 @@ func horizonalPattern(g *game) movementPattern {
     direction := rl.Vector2{X: 4, Y: 0}
 
     return func(e *enemy) rl.Vector2 {
-        result := rl.Vector2Add(direction, e.pos)
-
         e.shoot(e)
 
+        result := rl.Vector2Add(direction, e.pos)
         if !g.insideArena(result) {
             direction = rl.Vector2Negate(direction)
         }
-        return result
+        return direction
     }
 }
 
-// func aimPlayerPattern(g *game, p *player) movementPattern {
+// func foobarPattern(g *game) movementPattern {
+//
+//     pos := rl.Vector2{}
+//     state := 0
+//     wait := 0
+//
+//     return func(e *enemy) rl.Vector2 {
+//
+//         switch state {
+//         case 0: // init
+//             pos.X = e.pos.X
+//             state = 1
+//             return pos
+//         case 1: // descer
+//             pos.Y += 1
+//             if pos.Y >= 100 { state = 2; wait = 50 }
+//             return pos
+//         case 2: // atirar por um tempo
+//             e.shoot(e)
+//             wait -= 1
+//             if wait <= 0 { state = 3; wait = 60 }
+//             return pos
+//         case 3: // wait
+//             wait -= 1
+//             if wait <= 0 { state = 4 }
+//             return pos
+//         case 4: // retornar
+//             pos.Y -= 3
+//             if pos.Y - e.hitBoxRadius < 0 {
+//                 e.health = 0
+//             }
+//             return pos
+//         }
+//         panic(state)
+//     }
 // }
-
-func foobarPattern(g *game) movementPattern {
-
-    pos := rl.Vector2{}
-    state := 0
-    wait := 0
-
-    return func(e *enemy) rl.Vector2 {
-
-        switch state {
-        case 0: // init
-            pos.X = e.pos.X
-            state = 1
-            return pos
-        case 1: // descer
-            pos.Y += 1
-            if pos.Y >= 100 { state = 2; wait = 50 }
-            return pos
-        case 2: // atirar por um tempo
-            e.shoot(e)
-            wait -= 1
-            if wait <= 0 { state = 3; wait = 60 }
-            return pos
-        case 3: // wait
-            wait -= 1
-            if wait <= 0 { state = 4 }
-            return pos
-        case 4: // retornar
-            pos.Y -= 3
-            if pos.Y - e.hitBoxRadius < 0 {
-                e.health = 0
-            }
-            return pos
-        }
-        panic(state)
-    }
-}
 
 func (e *enemy) checkHit(g *game) (bool, *bullet, int) {
     for index, bullet := range g.bullets {
@@ -261,7 +258,8 @@ func (e *enemy) update(g *game, index int) {
     enemyColor := rl.Blue
 
     if e.move != nil {
-        e.pos = e.move(e)
+        e.pos = rl.Vector2Add(rl.Vector2Scale(e.move(e), g.gameSpeed), e.pos)
+        // e.pos = e.move(e)
     }
 
     if hit, bullet, idx := e.checkHit(g); hit {
@@ -320,7 +318,7 @@ func (p *player) shoot(g *game){
         return
     }
 
-    if g.frame % 3 != 0 {
+    if int(g.frame) % 3 != 0 {
         return
     }
 
@@ -392,7 +390,7 @@ func (p *player) update(g *game) {
 
 func main() {
 
-    state := &game{arenaWidth: 450, arenaHeight: 700, interfaceWidth: 300}
+    state := &game{arenaWidth: 450, arenaHeight: 700, interfaceWidth: 300, gameSpeed: 1}
 
     player := player{
         pos: rl.Vector2{
@@ -436,7 +434,7 @@ func main() {
 
     currectScore := 0
 
-    for ; !rl.WindowShouldClose(); state.frame += 1 {
+    for ; !rl.WindowShouldClose(); state.frame += state.gameSpeed {
         rl.BeginDrawing()
         rl.ClearBackground(rl.Black)
 
@@ -463,6 +461,12 @@ func main() {
 
 		rl.DrawText(strconv.Itoa(len(state.bullets)), state.arenaWidth, 50, 50, rl.White)
 
+        if player.focusMode {
+            state.gameSpeed = 0.3
+        } else {
+            state.gameSpeed = 1
+        }
+
 		rl.EndDrawing()
 	}