Added malfunctioning ship.

Currently it doesn't seem to be detecting the key preses.

CMakeLists.txt

@@ -42,7 +42,6 @@ include_directories(
 	SYSTEM ${ALLEG5_INCLUDE_DIRS})
 
 set(SRCS
-	src/display.c
 	src/event_manager.c
 	src/main.c
 	src/ship.c)

src/display.c

@@ -1,41 +0,0 @@
-/*
- * Copyright (C) 2018  Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
- * Author: Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "display.h"
-
-#ifdef DEBUG
-#	include <stdio.h>
-#endif
-
-int create_display(ALLEGRO_DISPLAY *display,
-		unsigned int width, unsigned int height) {
-	display = al_create_display(width, height);
-	if(!display)
-		return 0;
-#ifdef DEBUG
-	puts("Initialized display.");
-#endif
-	return 1;
-}
-
-void destroy_display(ALLEGRO_DISPLAY *display) {
-	al_destroy_display(display);
-#ifdef DEBUG
-	puts("Destroyed display.");
-#endif
-}

src/display.h

@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2018  Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
- * Author: Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#pragma once
-
-#include <allegro5/allegro.h>
-
-/**
- * @brief Create an allegro 5 display with a given width and height.
- *
- * @param display The display to create.
- * @param width The width of the display.
- * @param height The height of the display.
- *
- * @return If successful it will return 1, else it will return 0.
- */
-int create_display(ALLEGRO_DISPLAY *display,
-		unsigned int width, unsigned int height);
-
-/**
- * @brief Destroy the display (used for shutdown).
- *
- * @param display The display to destroy.
- */
-void destroy_display(ALLEGRO_DISPLAY *display);

src/event_manager.c

@@ -23,6 +23,7 @@
 #	include <stdio.h>
 #endif
 #include <stddef.h>
+#include <assert.h>
 #include <allegro5/allegro.h>
 
 static ALLEGRO_EVENT_QUEUE *event_queue;
@@ -30,6 +31,7 @@ static ALLEGRO_TIMER *timer;
 static int keys[KEY_MAX];
 
 int evnt_mngr_init(ALLEGRO_DISPLAY *display) {
+	assert(display);
 	if(!al_install_keyboard())
 		return 0;
 #ifdef DEBUG
@@ -133,13 +135,6 @@ void handle_event() {
 }
 
 int key_is_down(int code) {
-	if(code < 0 || code >= KEY_MAX)
+	assert(code >= 0 && code <= KEY_MAX);
-	{
+	return keys[code];
-#ifdef DEBUG
-		fprintf(stderr, "key_is_down(int): bad key code!\n");
-#endif
-		return 0;
-	}
-	else
-		return keys[code];
 }

src/event_manager.h

@@ -33,6 +33,9 @@ enum {
 /**
  * @brief Initialize the event handler.
  *
+ * @param display A pointer to the display (used to get
+ * event source).
+ *
  * @return 0 upon failure, 1 upon success.
  */
 int evnt_mngr_init(ALLEGRO_DISPLAY *display);

src/main.c

@@ -17,7 +17,6 @@
  */
 
 #include "globals.h"
-#include "display.h"
 #include "event_manager.h"
 #include "ship.h"
 
@@ -38,23 +37,32 @@ int main() {
 		fprintf(stderr, "alleg5: failed to initialize Allegro.\n");
 		return 1;
 	}
+#ifdef DEBUG
+	puts("Initialized allegro system.");
+#endif
 	if(!al_init_primitives_addon())
 	{
 		fprintf(stderr, "alleg5: failed to initialize primitives addon.\n");
 		return 1;
 	}
+#ifdef DEBUG
+	puts("Initialized primitives addon.");
+#endif
 
-	ALLEGRO_DISPLAY *display;
+	ALLEGRO_DISPLAY *display = al_create_display(800, 600);
-	if(!create_display(display, 800, 600))
+	if(!display)
 	{
-		fprintf(stderr, "alleg5: failed to create display.\n");
+		fprintf(stderr, "alleg5: failed to initialize display.\n");
 		return 1;
 	}
+#ifdef DEBUG
+	puts("Created display.");
+#endif
 
 	if(!evnt_mngr_init(display))
 	{
 		fprintf(stderr, "alleg5: failed to initialize event queue.\n");
-		destroy_display(display);
+		al_destroy_display(display);
 		return 1;
 	}
 
@@ -81,7 +89,7 @@ int main() {
 			 */
 			ship_update(&ship);
 			al_clear_to_color(al_map_rgb(0, 0, 0));
-			// TODO: run simulation draw functions
+			ship_draw(&ship);
 			if(show_info)
 			{
 				// TODO: draw simulation stats
@@ -97,7 +105,7 @@ int main() {
 	}
 
 	evnt_mngr_deinit();
-	destroy_display(display);
+	al_destroy_display(display);
 	al_shutdown_primitives_addon();
 #ifdef DEBUG
 	puts("Shutdown primitives addon.");

src/ship.c

@@ -20,10 +20,9 @@
 #include "event_manager.h"
 #include "globals.h"
 
-#ifdef DEBUG
-#	include <stdio.h>
-#endif
 #include <math.h>
+#include <assert.h>
+#include <allegro5/allegro_primitives.h>
 
 #ifndef M_PI
 #	define M_PI 3.14159265f
@@ -31,16 +30,10 @@
 
 #define ACCEL 5.0f
 #define TURN_ACCEL (M_PI / FPS)  // turn at pi radians / sec
+#define SHIP_RADIUS 10.0f  // radius of the ship in pixels
 
 void ship_init(struct ship *ship, int x, int y) {
-	if(!ship)
+	assert(ship);
-	{
-#ifdef DEBUG
-		fprintf(stderr,
-				"ship_init(struct ship*,int,int): invalid ship.\n");
-#endif
-		return;
-	}
 	ship->x = x;
 	ship->y = y;
 	ship->velX = ship->velY = 0;
@@ -48,15 +41,7 @@ void ship_init(struct ship *ship, int x, int y) {
 }
 
 void ship_update(struct ship *ship) {
-	if(!ship)
+	assert(ship);
-	{
-#ifdef DEBUG
-		fprintf(stderr,
-				"ship_update(struct ship*): invalid ship.\n");
-#endif
-		return;
-	}
-
 	if(key_is_down(KEY_UP))
 	{
 		ship->velX += cos(ship->direction) * ACCEL;
@@ -79,3 +64,21 @@ void ship_update(struct ship *ship) {
 	else if(ship->direction < 0)
 		ship->direction += M_PI * 2;
 }
+
+void ship_draw(struct ship *ship) {
+	assert(ship);
+	const float x0 = ship->x + (cos(ship->direction) *
+			SHIP_RADIUS);
+	const float y0 = ship->y + (sin(ship->direction) *
+			SHIP_RADIUS);
+	const float x1 = ship->x + (cos(ship->direction +
+				M_PI * 0.8f) * SHIP_RADIUS);
+	const float y1 = ship->y + (sin(ship->direction +
+				M_PI * 0.8f) * SHIP_RADIUS);
+	const float x2 = ship->x + (cos(ship->direction +
+				M_PI * 1.2f) * SHIP_RADIUS);
+	const float y2 = ship->y + (sin(ship->direction +
+				M_PI * 1.2f) * SHIP_RADIUS);
+	al_draw_filled_triangle(x0, y0, x1, y1, x2, y2,
+			al_map_rgb(0xFF, 0x0, 0x0));
+}

src/ship.h

@@ -18,6 +18,8 @@
 
 #pragma once
 
+#include <allegro5/allegro.h>
+
 struct ship {
 	float x, y; ///< The x and y coordinates of the ship.
 	float velX, velY; ///< The x and y velocities of the ship.
@@ -44,3 +46,10 @@ void ship_init(struct ship *ship, int x, int y);
  * @param ship A pointer to the ship object.
  */
 void ship_update(struct ship *ship);
+
+/**
+ * @brief Draw the ship.
+ *
+ * @param ship Ship object to draw.
+ */
+void ship_draw(struct ship *ship);