botó per a donar energiaa les pilotes

source/ball.cpp

@@ -67,6 +67,7 @@ void Ball::update()
     {
         y = 0;
         vy = -vy;
+        vy = -vy * loss;
     }
 
     // Comprueba las colisiones con la parte inferior
@@ -89,7 +90,7 @@ void Ball::update()
         {
             vx = 0.0f;
             stopped = true;
-            //exit(0);
+            // exit(0);
         }
     }
 
@@ -103,4 +104,13 @@ void Ball::render()
 {
     sprite->setColor(color.r, color.g, color.b);
     sprite->render();
+}
+
+// Modifica la velocidad
+void Ball::modVel(float vx, float vy)
+{
+    this->vx = this->vx + vx;
+    this->vy = this->vy + vy;
+    onFloor = false;
+    stopped = false;
 }

source/ball.h

@@ -31,4 +31,7 @@ public:
 
     // Pinta la clase
     void render();
+
+    // Modifica la velocidad
+    void modVel(float vx, float vy);
 };

source/main.cpp

@@ -20,8 +20,9 @@ void initBalls(int value)
 {
 	for (int i = 0; i < test[value]; ++i)
 	{
-		const int sign = ((rand() % 2) * 2) - 1;;
+		const int sign = ((rand() % 2) * 2) - 1;
-		const float x = (rand()%(SCREEN_WIDTH/2)) + (SCREEN_WIDTH / 4);
+		;
+		const float x = (rand() % (SCREEN_WIDTH / 2)) + (SCREEN_WIDTH / 4);
 		const float vx = (((rand() % 20) + 10) * 0.1f) * sign;
 		const float vy = ((rand() % 60) - 30) * 0.1f;
 		const color_t color = {(rand() % 192) + 32, (rand() % 192) + 32, (rand() % 192) + 32};
@@ -30,6 +31,17 @@ void initBalls(int value)
 	}
 }
 
+void pushUpBalls()
+{
+	for (auto ball : balls)
+	{
+		const int sign = ((rand() % 2) * 2) - 1;
+		const float vx = (((rand() % 20) + 10) * 0.1f) * sign;
+		const float vy = ((rand() % 40) * 0.1f) + 5;
+		ball->modVel(vx, -vy);
+	}
+}
+
 bool init()
 {
 	// Initialization flag
@@ -87,7 +99,7 @@ bool init()
 
 	texture = new Texture(renderer, "resources/pelota.png");
 	ticks = SDL_GetTicks();
-	srand (time(NULL));
+	srand(time(NULL));
 	initBalls(2);
 
 	return success;
@@ -139,6 +151,14 @@ void checkEvents()
 			shouldExit = true;
 			break;
 		}
+
+		if (event->type == SDL_KEYDOWN)
+		{
+			if (event->key.keysym.sym == SDLK_SPACE)
+			{
+				pushUpBalls();
+			}
+		}
 	}
 }