Demo: añadido efecto al degradado

main.cpp

@@ -20,6 +20,10 @@ SDL_Renderer *renderer;
 int ticks = 0;
 int ticksSpeed = 15;
 int counter = 0;
+int gradColorMin = 64;		 // Minimo color más alto del degradado
+int gradColorMax = 192;		 // Minimo color más alto del degradado
+int gradCurrentColor = 192;	 // Color actual más alto del degradado
+int gradBreathDirection = 0; // Indica si gradCurrentColor crece o decrece
 
 int main(int argc, char *argv[])
 {
@@ -123,15 +127,51 @@ int main(int argc, char *argv[])
 			// Actualiza el sprite
 			if (sprite->getPosX() + sprite->getWidth() > options->gameWidth or sprite->getPosX() < 0)
 			{
-				sprite->setVelX(sprite->getVelX() * -1);
+				sprite->undoMoveX();
+				int spr_direction = 1;
+				int spr_force = 1;
+				if (sprite->getVelX() > 0)
+				{
+					spr_direction = -1;
+				}
+				if (SDL_GetTicks() % 2 == 0)
+				{
+					spr_force = 2;
+				}
+				sprite->setVelX(spr_force * spr_direction);
 				JA_PlaySound(sound);
 			}
 			if (sprite->getPosY() + sprite->getHeight() > options->gameHeight or sprite->getPosY() < 0)
 			{
-				sprite->setVelY(sprite->getVelY() * -1);
+				sprite->undoMoveY();
+				int spr_direction = 1;
+				int spr_force = 1;
+				if (sprite->getVelY() > 0)
+				{
+					spr_direction = -1;
+				}
+				if (SDL_GetTicks() % 2 == 0)
+				{
+					spr_force = 2;
+				}
+				sprite->setVelY(spr_force * spr_direction);
 				JA_PlaySound(sound);
 			}
 			sprite->update();
+
+			// Actualiza el degradado
+			//if (counter % 4 == 0)
+			{
+				gradBreathDirection == 0 ? gradCurrentColor-- : gradCurrentColor++;
+				if (gradCurrentColor == gradColorMin)
+				{
+					gradBreathDirection = 1;
+				}
+				if (gradCurrentColor == gradColorMax)
+				{
+					gradBreathDirection = 0;
+				}
+			}
 		}
 
 		// Dibuja en pantalla
@@ -142,12 +182,11 @@ int main(int argc, char *argv[])
 		const int gradLastLine = options->gameHeight;
 		const int gradNumLines = gradLastLine - gradFirstLine;
 		const int gradColorFrom = 0;
-		const int gradColorTo = 192;
 
 		for (int i = gradFirstLine; i < gradLastLine; ++i)
 		{
 			float step = ((float)(i - gradFirstLine) / gradNumLines);
-			int color = gradColorFrom + ((gradColorTo - gradColorFrom) * step);
+			int color = gradColorFrom + ((gradCurrentColor - gradColorFrom) * step);
 			SDL_SetRenderDrawColor(renderer, color, 0x00, 0x00, 0xFF);
 			SDL_RenderDrawLine(renderer, 0, i, options->gameWidth, i);
 		}