First commit

Makefile

@@ -0,0 +1,2 @@
+build:
+	gcc pong.c -o pong -lallegro_color -lallegro_ttf -lallegro_font -lallegro_image -lallegro_primitives -lallegro

pong.c

@@ -0,0 +1,111 @@
+#include <stdio.h>
+#include <allegro5/allegro.h>
+#include <allegro5/allegro_font.h>
+#include <allegro5/allegro_ttf.h>
+#include <allegro5/allegro_image.h>
+#include <allegro5/allegro_primitives.h>
+
+#define WIN_WIDTH 1000
+#define WIN_HEIGHT 600
+
+void alleg_init();
+
+void alleg_init() {
+	al_init();
+	al_install_keyboard();
+	al_install_mouse();
+	al_init_image_addon();
+	al_init_font_addon();
+	al_init_ttf_addon();
+
+	return;
+}
+
+
+int main(int argc, char** argv) {
+//	Initialization
+
+	alleg_init();
+	ALLEGRO_DISPLAY* disp = al_create_display(WIN_WIDTH, WIN_HEIGHT);
+	ALLEGRO_EVENT_QUEUE* queue  = al_create_event_queue();
+	al_register_event_source(queue,al_get_keyboard_event_source());
+	ALLEGRO_COLOR black = al_map_rgba(0,0,0,255);
+	ALLEGRO_COLOR white = al_map_rgba(255,255,255,255);
+	ALLEGRO_EVENT event;
+	bool running = true;
+	bool key_down_1 = false;
+	bool key_down_2 = false;
+
+	float width = 25;
+	float height = 150;
+	float start_x_1 = 10;
+	float start_y_1 = 10;
+	float start_x_2 = WIN_WIDTH - 10 - width;
+	float start_y_2 = 10;
+	float velocity_1 = 0;
+	float velocity_2 = 0;
+
+	al_clear_to_color(black);
+	al_draw_filled_rectangle(start_x_1, start_y_1, start_x_1 + width, start_y_1 + height, white);
+	al_draw_filled_rectangle(start_x_2, start_y_2, start_x_2 + width, start_y_2 + height, white);
+	al_flip_display();
+
+	while (running) {
+		// Code borrowed from: https://stackoverflow.com/a/30078011
+
+		while (!al_is_event_queue_empty(queue)) {
+			al_wait_for_event(queue, &event);
+
+			if (event.type == ALLEGRO_EVENT_KEY_DOWN) {
+				switch (event.keyboard.keycode) {
+					case ALLEGRO_KEY_W:
+						velocity_1 -= 5;
+						break;
+					case ALLEGRO_KEY_S:
+						velocity_1 += 5;
+						break; 
+					case ALLEGRO_KEY_UP:
+						velocity_2 -= 5;
+						break;
+					case ALLEGRO_KEY_DOWN:
+						velocity_2 += 5;
+						break;
+
+					case ALLEGRO_KEY_Q:
+						running = false;
+						break;
+				}
+
+			} else if (event.type == ALLEGRO_EVENT_KEY_UP) {
+				switch (event.keyboard.keycode) {
+					case ALLEGRO_KEY_W:
+						velocity_1 += 5;
+						break;
+					case ALLEGRO_KEY_S:
+						velocity_1 -= 5;
+						break;
+					case ALLEGRO_KEY_UP:
+						velocity_2 += 5;
+						break;
+					case ALLEGRO_KEY_DOWN:
+						velocity_2 -= 5;
+						break;
+
+				}
+			}
+		}
+
+		al_clear_to_color(black);
+		((velocity_1 < 0 && start_y_1  > 0) || (velocity_1 > 0 && start_y_1 + height < WIN_HEIGHT)) && (start_y_1 += velocity_1);
+		((velocity_2 < 0 && start_y_2  > 0) || (velocity_2 > 0 && start_y_2 + height < WIN_HEIGHT)) && (start_y_2 += velocity_2);
+		al_draw_filled_rectangle(start_x_1, start_y_1, start_x_1 + width, start_y_1 + height + velocity_1, white);		
+		al_draw_filled_rectangle(start_x_2, start_y_2, start_x_2 + width, start_y_2 + height + velocity_2, white);		
+		al_flip_display();
+	}
+
+//	Clean up
+	al_destroy_display(disp);
+	al_destroy_event_queue(queue);	
+	
+	return 0;
+}