Muchos pequeños cambios para estandarizar y mejorar la demo

source/main.cpp

@@ -1,4 +1,3 @@
-#include <SDL2/SDL.h>
 #include "texture.h"
 #include "ball.h"
 #include "defines.h"
@@ -54,13 +53,19 @@ bool init()
 
 	event = new SDL_Event();
 
-	texture = new Texture(renderer, "resources/pelota.png");
+	texture = new Texture(renderer, TEXTURE_FILE);
 	for (int i = 0; i < NUM_BALLS; ++i)
 	{
-		ball[i] = new Ball(rand() % SCREEN_WIDTH, rand() % SCREEN_HEIGHT, 24, 24, 1, 1, texture);
+		const int vx = rand() % 2 == 0 ? 1 : -1;
+		const int vy = rand() % 2 == 0 ? 1 : -1;
+		const int x = rand() % SCREEN_WIDTH;
+		const int y = rand() % SCREEN_HEIGHT;
+		const int size = BALL_SIZE;
+		ball[i] = new Ball(x, y, size, size, vx, vy, texture);
 	}
 
 	ticks = SDL_GetTicks();
+	srand(time(NULL));
 
 	return success;
 }
@@ -106,6 +111,19 @@ void checkEvents()
 			shouldExit = true;
 			break;
 		}
+
+		if (event->type == SDL_KEYDOWN && event->key.repeat == 0)
+		{
+			switch (event->key.keysym.sym)
+			{
+			case SDLK_ESCAPE:
+				shouldExit = true;
+				break;
+			
+			default:
+				break;
+			}
+		}
 	}
 }
 
@@ -124,7 +142,7 @@ void update()
 
 void render()
 {
-	SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+	SDL_SetRenderDrawColor(renderer, BG_R, BG_G, BG_B, 255);
 	SDL_RenderClear(renderer);
 
 	for (int i = 0; i < NUM_BALLS; ++i)