I've big problem with my university project.
I tried to make simple game in Allegro5, but I've stopped at making Main Menu.
I've basic code, but on 4 possibility: Start Game, Options, Credits,Exit. I can see just one of them ( exit ). Don't know how to fix it, can you help me ?
///////////// MENU
string menu[4] = { "Start Game", "Options", "Credits", "Exit" };
while (!quit)
{
ALLEGRO_EVENT ev;
al_wait_for_event(event_queue, &ev);
if (ev.type == ALLEGRO_EVENT_TIMER)
{
redraw = true;
}
if (ev.type == ALLEGRO_EVENT_KEY_DOWN)
{
switch (ev.keyboard.keycode)
{
case ALLEGRO_KEY_UP:
checked--;
break;
case ALLEGRO_KEY_DOWN:
checked++;
break;
case ALLEGRO_KEY_ESCAPE:
quit = true;
break;
case ALLEGRO_KEY_ENTER:
active = true;
break;
}
}
if (checked < 0) //JAK NAM WYJEDZIE PONIZEJ ZERA TO USTAWIAMY NA 3 (ZAPETLA SIE MENU, JAKBYS CHCIAL ZABLOKOWAC TO DAJ NA 0)
{
checked = 3;
}
if (checked > 3)
{
checked = 0;
}
else if (ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
{
break;
}
**if (redraw && al_is_event_queue_empty(event_queue)) // JEZELI NIE WYKRYWA ZADNEGO RUCHU TO
{
redraw = false; // PRZERYSOWANIE WYNOSI 0
al_clear_to_color(al_map_rgb(0, 0, 0));
for (int i = 0; i < 4; i++)
{
int color;
if (i == checked)
{
color = 255;
}
else
{
color = 11;
}
al_draw_bitmap(mmenu, 0, 0, NULL);
al_draw_text(font, al_map_rgb(123, color, 45), 50, i * 60, NULL, menu[i].c_str()); // I PISZEMY TEKST
}
}
/*else if () // JEDNAK JAK ZOSTANIE WYKRYTY RUCH TO
{
redraw = true; // NASTĘPUJE PRZERYSOWANIE BITMAPY ZE ZMIENIONA OPCJA MENU
}*/**
al_flip_display();
}
al_destroy_display(display);
al_destroy_timer(timer);
al_destroy_bitmap(mmenu);
al_destroy_event_queue(event_queue);
return 0;
}
Related
int main() {
sf::RenderWindow window;
sf::Vector2i centerWindow((sf::VideoMode::getDesktopMode().width / 2) - 445, (sf::VideoMode::getDesktopMode().height / 2) - 480);
window.create(sf::VideoMode(900, 900), "SFML Game", sf::Style::Titlebar | sf::Style::Close);
window.setPosition(centerWindow);
window.setKeyRepeatEnabled(true);
sf::Texture wallTxture;
sf::Sprite wall;
if (!wallTxture.loadFromFile("wall.png")) {
std::cerr << "Error\n";
}
wall.setTexture(wallTxture);
//Gravity Vars:
int groundHeight = 750;
bool isJumping = false;
//Movement Vars:
bool goingRight = false;
bool goingLeft = false;
//Set View Mode:
sf::View followPlayer;
followPlayer.reset(sf::FloatRect(0, 0, window.getSize().x, window.getSize().y));
Player player("newPlayer.png");
player.setPos({ 800, 800 });
sf::Vector2f position(window.getSize().x / 2, window.getSize().y / 2);
//Main Loop:
while (window.isOpen()) {
const float moveSpeed = 0.1;
sf::Event Event;
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) {
isJumping = true;
//Handle Movement While Jumping:
if (goingLeft == true) {
player.move({ -moveSpeed, -moveSpeed });
}
else if (goingRight == true) {
player.move({ moveSpeed, -moveSpeed });
}
else {
player.move({ 0, -moveSpeed });
}
}
else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) {
player.move({ 0, moveSpeed });
}
else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left)) {
player.move({ -moveSpeed, 0 });
goingLeft = true;
player.flipX('l');
}
else if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right)) {
player.move({ moveSpeed, 0 });
goingRight = true;
player.flipX('r');
}
//Event Loop:
while (window.pollEvent(Event)) {
switch (Event.type) {
case sf::Event::Closed:
window.close();
case sf::Event::KeyReleased:
if (Event.key.code == sf::Keyboard::Up) {
isJumping = false;
}
else if (Event.key.code == sf::Keyboard::Left) {
goingLeft = false;
}
else if (Event.key.code == sf::Keyboard::Right) {
goingRight = false;
}
}
}
if (player.getX() > window.getSize().x) {
position.x = player.getX();
}
else {
position.x = window.getSize().x;
}
//If player is in air and not jumping:
if (player.getY() < groundHeight && isJumping == false) {
player.move({ 0, moveSpeed });
}
followPlayer.setCenter(position);
window.clear();
window.setView(followPlayer);
window.draw(wall);
player.drawTo(window);
window.display();
}
}
this is my code. What I am trying to do is create a 2D platformer sidescroller. Everything works, except when the sprite goes past a certain point it'll just disappear. This also happens when I jump and move through the air at the same time. I cannot figure out why this is happening, any help would be greatly appreciated :)
I fixed the problem by just getting rid of my flipX function, and instead just creating a new sprite facing a different direction, then changing it everytime the user is facing a new direction
In the following code a sprite can by clicked with left mouse button and then moved around freely. Then you have to hit the right button to "free" it again.
Now what is, if I want to use left button for removing the focus, instead of right button. Is this possible and how? I can't imagine, how to do it. Many thanks in advance.
#include <SFML/Graphics.hpp>
#include <iostream>
#include <vector>
int main()
{
sf::RenderWindow mMainWindow(sf::VideoMode(600,600), "Map", sf::Style::Close);
mMainWindow.setFramerateLimit(60);
mMainWindow.setKeyRepeatEnabled(false);
sf::Image image;
image.create(50, 50, sf::Color::Red);
sf::Texture texture;
texture.loadFromImage(image);
std::vector<sf::Sprite> EnemyVector;
sf::Sprite* focus = nullptr;
bool move = false;
while (mMainWindow.isOpen())
{
sf::Event event;
bool creating = false;
bool leftclicked = false;
bool rightclicked = false;
sf::Vector2i mousePos;
while (mMainWindow.pollEvent(event))
{
switch (event.type)
{
case sf::Event::Closed:
mMainWindow.close();
break;
case sf::Event::KeyPressed:
creating = (event.key.code == sf::Keyboard::A);
break;
case sf::Event::MouseButtonPressed:
if (event.mouseButton.button == sf::Mouse::Left)
{
leftclicked = true;
mousePos = sf::Vector2i(event.mouseButton.x, event.mouseButton.y);
break;
}
if (event.mouseButton.button == sf::Mouse::Right)
{
rightclicked = true;
mousePos = sf::Vector2i(event.mouseButton.x, event.mouseButton.y);
break;
}
}
}
if (creating)
{
sf::Sprite sprite;
mousePos = (mousePos == sf::Vector2i(0, 0) ? sf::Mouse::getPosition(mMainWindow) : mousePos);
sprite.setTexture(texture);
sprite.setColor(sf::Color::Red);
sprite.setOrigin(static_cast<float>(sprite.getTextureRect().width) / 2, static_cast<float>(sprite.getTextureRect().height) / 2);
sprite.setPosition(static_cast<float>(mousePos.x), static_cast<float>(mousePos.y));
focus=nullptr;
EnemyVector.push_back(sprite);
}
if (leftclicked)
{
for (auto& enemy = EnemyVector.rbegin(); enemy != EnemyVector.rend(); ++enemy)
{
if (enemy->getGlobalBounds().contains(static_cast<float>(mousePos.x), static_cast<float>(mousePos.y)))
{
focus = &(*enemy);
move = true;
break;
}
}
}
if(rightclicked)
{
focus = nullptr;
}
if(move)
{
if(focus!=nullptr)
{
focus->move((sf::Mouse::getPosition(mMainWindow).x - focus->getPosition().x),(sf::Mouse::getPosition(mMainWindow).y - focus->getPosition().y));
}
}
mMainWindow.clear();
for (auto& enemy = EnemyVector.rbegin(); enemy != EnemyVector.rend(); ++enemy)
{
mMainWindow.draw(*enemy);
}
mMainWindow.display();
}
return 0;
}
try this
if (leftclicked)
{
for (auto& enemy = EnemyVector.rbegin(); enemy != EnemyVector.rend(); ++enemy)
{
if (enemy->getGlobalBounds().contains(static_cast<float>(mousePos.x), static_cast<float>(mousePos.y)))
{
focus = &(*enemy);
move = !move;
break;
}
}
}
I'm making a simple top down 2D shooter, where you move with WASD and shoot in the direction you're looking at with space. I can move and shoot just fine, but I can't do them both at the same time. For example if I'm shooting and start moving, my character will stop shooting until I release and press space again, and if I then start moving in another direction I have to release and press space again.
Here's my main method:
int main(int argc, char* args[])
{
if (!init())
{
log("Failed to initialize!\n");
}
else
{
log("Initialized SDL and SDL subsystems. \nLoading assets:\n");
if (!loadAssets())
{
printf("Failed to load assets!\n");
}
else
{
log("All assets loaded successfully.\n");
bool running = true;
SDL_Event e;
std::vector<Shot> shots;
LTimer shotTimer;
float cooldown = 250.0f;
float previousCooldown = 0.0f;
Player player;
log("Game running.\n");
shotTimer.start();
while (running)
{
while (SDL_PollEvent(&e) != 0)
{
if (e.type == SDL_QUIT)
{
log("SDL_QUIT event triggered.\n");
running = false;
}
else if (e.type == SDL_KEYDOWN)
{
switch (e.key.keysym.sym)
{
case SDLK_ESCAPE:
{
running = false;
break;
}
}
}
player.handleEvent(e);
if (SDL_GetTicks() - previousCooldown > cooldown)
{
previousCooldown = SDL_GetTicks();
shots = shoot(e, player, shots);
}
}
player.move();
for (int i = 0; i < shots.size(); i++)
{
shots[i].move();
}
/*if (shotTimer.getTicks() >= cooldown)
shotTimer.restart();*/
SDL_SetRenderDrawColor(renderer, 0xff, 0xff, 0xff, 0xff);
SDL_RenderClear(renderer);
background.render(0, 0);
for (int i = 0; i < shots.size(); i++)
{
shots[i].render();
}
player.render();
SDL_RenderPresent(renderer);
}
}
}
close();
return 0;
}
Here's my shoot() function, which is probably what's causing this:
std::vector<Shot> shoot(SDL_Event& e, Player player, std::vector<Shot> shots)
{
bool shoot = false;
if (e.type = SDL_KEYDOWN && e.key.repeat == 1)
{
switch (e.key.keysym.sym)
{
case SDLK_SPACE:
{
shoot = true;
break;
}
}
}
else if (e.type = SDL_KEYUP && e.key.repeat == 1)
{
switch (e.key.keysym.sym)
{
case SDLK_SPACE:
{
shoot = false;
break;
}
}
}
if (shoot)
{
Shot newShot(player.getDir(), player);
shots.push_back(newShot);
}
return shots;
}
And this is how I move the player
void Player::handleEvent(SDL_Event& e)
{
if (e.type == SDL_KEYDOWN && e.key.repeat == 0)
{
switch (e.key.keysym.sym)
{
case SDLK_w: mVelY -= PLAYER_VEL; mDir = 0; break;
case SDLK_s: mVelY += PLAYER_VEL; mDir = 1; break;
case SDLK_d: mVelX += PLAYER_VEL; mDir = 2; break;
case SDLK_a: mVelX -= PLAYER_VEL; mDir = 3; break;
}
}
else if (e.type == SDL_KEYUP && e.key.repeat == 0)
{
switch (e.key.keysym.sym)
{
case SDLK_w: mVelY += PLAYER_VEL; break;
case SDLK_s: mVelY -= PLAYER_VEL; break;
case SDLK_d: mVelX -= PLAYER_VEL; break;
case SDLK_a: mVelX += PLAYER_VEL; break;
}
}
}
Separate your event polling from the rest of the game logic.
Poll all events once per frame in a separate function and store the state of the keystates into an array. Then, when you need the state, simply check the array.
You can also use SDL_GetKeyboardState to sample the surrent state of the keys, without having to handle the key events yourself.
I've been following LazyFoo's tutorial for a while. But I haven't been able to get this to initialize a week a go. I went back to it recently, after error checking, I found it that the window initializes properly, but the images won't load. What is the reason for it?
#include "SDL/SDL.h"
#include <string>
//setting screen info
const int SCH=640;
const int SCW=480;
const int BBP=32;
const char* name = "TEHGAEM";
// sprite height and width
const int SPH=45;
const int SPW=45;
//initilize event
SDL_Event event;
//loading surfaces for screen, sprite, and temp sprite
SDL_Surface *screen=NULL;
SDL_Surface *sprite=NULL;
SDL_Surface *temp = NULL;
//making class for movable objects
class Player
{
private:
int x,y;
int xVel,yVel;
public:
Player();
void show();
void move();
void handle_input();
};
//initializing variables
Player::Player()
{
x=0;
y=0;
xVel=0;
yVel=0;
}
//intended to show player picture
void Player::show()
{
SDL_Rect pos;
pos.x=x;
pos.y=y;
SDL_BlitSurface(sprite, NULL, screen, &pos);
SDL_UpdateRects(screen, 1, &pos);
}
//setting input
void Player::handle_input()
{
if (event.type ==SDL_KEYDOWN)
{
switch (event.key.keysym.sym)
{
case SDLK_UP: yVel -= SPH /2; break;
case SDLK_DOWN: yVel += SPH /2; break;
case SDLK_LEFT: xVel -=SPW /2; break;
case SDLK_RIGHT: xVel +=SPW /2; break;
}
}
if (event.type == SDL_KEYUP)
{
switch(event.key.keysym.sym)
{
case SDLK_UP: yVel += SPH /2; break;
case SDLK_DOWN: yVel -= SPH /2; break;
case SDLK_LEFT: xVel +=SPW /2; break;
case SDLK_RIGHT: xVel -=SPW /2; break;
}
}
}
void Player::move()
{
x=+xVel;
y=+yVel;
if (x >= SCW)
{
x-10;
}
if (y >= SCH)
{
y-10;
}
}
//initializing program
bool init()
{
if (SDL_Init(SDL_INIT_EVERYTHING)==-1)
{
return false;
}
screen = SDL_SetVideoMode(SCH,SCW,BBP, SDL_SWSURFACE);
if (screen == NULL)
{
return false;
}
SDL_WM_SetCaption(name, NULL);
return true;
}
//loading images
bool somethings()
{
temp = SDL_LoadBMP("sprite.bmp");
if (temp == NULL)
{
return false;
}
sprite = SDL_DisplayFormat (temp);
if (sprite ==NULL)
{
return false;
}
SDL_FreeSurface(temp);
return true;
}
//clean up function
void clean()
{
SDL_FreeSurface(sprite);
SDL_Quit();
}
int main(int argc, char* args[])
{
Player P1;
bool quit;
if (init() == false)
{
return 1;
}
if (somethings() ==false)
{
return 1;
}
while (quit ==false)
{
while (SDL_PollEvent(&event))
{
P1.handle_input();
if (event.type == SDL_QUIT)
{
quit == true;
}
}
if (SDL_Flip(screen) ==-1)
{
return 1;
}
P1.move();
P1.show();
}
clean();
return 0;
}
This isn't completely related to your problem but the varible bool quit; isn't defined as true or false before the main while( quit == false ) { ... }loop. This could produce undefined while loop behavior.
int main(int argc, char* args[])
{
Player P1;
bool quit = false; // CHANGE THIS AND SEE WHAT HAPPENS
if (init() == false)
{
return 1;
}
if (somethings() ==false)
{
return 1;
}
while (quit ==false)
{
while (SDL_PollEvent(&event))
{
P1.handle_input();
if (event.type == SDL_QUIT)
{
quit == true;
}
}
if (SDL_Flip(screen) ==-1)
{
return 1;
}
P1.move();
P1.show();
}
clean();
return 0;
}
About the images not loading, step through your program with a debugger and watch your somethings()function and follow the variables temp and sprite.
Make sure your "sprite.bmp" file is located in the running directory of this program. I tested it and it works for me.
Also this has no effect:
if (x >= SCW)
{
x-10;
}
if (y >= SCH)
{
y-10;
}
You probably wanted to say x -= 10; and y -= 10;.
This makes your 'player' jump back to the original position immediately:
if (event.type == SDL_KEYUP)
{
switch(event.key.keysym.sym)
{
case SDLK_UP: yVel += SPH /2; break;
case SDLK_DOWN: yVel -= SPH /2; break;
case SDLK_LEFT: xVel +=SPW /2; break;
case SDLK_RIGHT: xVel -=SPW /2; break;
}
}
You probably only need to handle SDL_KEYDOWN event.
Hope that helps.
There are big chances that you aren't loading the bitmap. But anything that you are trying to print on the screen and wasn't loaded can terminate the app.
I'm new in Allegro 5, I've written some code with the few tutorials there are so far, but I cannot get the joystick sticks input.
Here the code, it is just two bars moving perpendicularly(and a very lazy approach, just swapped the x an y coordinates on the second bar).
#pragma comment (lib,"allegro-5.0.2-monolith-md-debug.lib")
#include <stdio.h>
#include <string>
#include <iostream>
#include <allegro5/allegro.h>
#include <allegro5/allegro_font.h>
#include <allegro5/allegro_ttf.h>
#define FPS 0xFF
#define SCREEN_W 1000
#define SCREEN_H 750
#define BAR_W 75
#define BAR_H 10
enum KEYS
{
KEY_LEFT, KEY_RIGHT
};
int main(int argc, char **argv)
{
ALLEGRO_DISPLAY *display = NULL;
ALLEGRO_EVENT_QUEUE *event_queue = NULL;
ALLEGRO_JOYSTICK *joystick = NULL;
ALLEGRO_TIMER *timer = NULL;
ALLEGRO_BITMAP *bouncer = NULL;
float bouncer_x = SCREEN_W / 2.0 - BAR_W / 2.0;
float bouncer_y = SCREEN_H - BAR_H;
bool key[2] = {false, false};
bool redraw = true;
bool doexit = false;
if(!al_init())
{
fprintf(stderr, "failed to initialize allegro!\n");
return -1;
}
if(!al_install_keyboard())
{
fprintf(stderr, "failed to initialize the keyboard!\n");
return -1;
}
if(!al_install_joystick())
{
fprintf(stderr, "failed to initialize the joystick!\n");
}
al_reconfigure_joysticks();
joystick=al_get_joystick(al_get_num_joysticks()-1);
timer = al_create_timer(1.0 / FPS);
if(!timer)
{
fprintf(stderr, "failed to create timer!\n");
return -1;
}
display = al_create_display(SCREEN_W, SCREEN_H);
if(!display)
{
fprintf(stderr, "failed to create display!\n");
al_destroy_timer(timer);
return -1;
}
bouncer = al_create_bitmap(BAR_W, BAR_H);
if(!bouncer)
{
fprintf(stderr, "failed to create bouncer bitmap!\n");
al_destroy_display(display);
al_destroy_timer(timer);
return -1;
}
al_set_target_bitmap(bouncer);
al_clear_to_color(al_map_rgb(0, 0, 255));
al_set_target_bitmap(al_get_backbuffer(display));
event_queue = al_create_event_queue();
if(!event_queue)
{
fprintf(stderr, "failed to create event_queue!\n");
al_destroy_bitmap(bouncer);
al_destroy_display(display);
al_destroy_timer(timer);
return -1;
}
al_register_event_source(event_queue, al_get_display_event_source(display));
al_register_event_source(event_queue, al_get_timer_event_source(timer));
al_register_event_source(event_queue, al_get_keyboard_event_source());
al_register_event_source(event_queue, al_get_joystick_event_source());
al_clear_to_color(al_map_rgb(0,0,0));
al_flip_display();
al_start_timer(timer);
while(!doexit)
{
ALLEGRO_EVENT ev;
al_wait_for_event(event_queue, &ev);
if(ev.type == ALLEGRO_EVENT_TIMER)
{
if(key[KEY_LEFT] && bouncer_x >= 2.0)
bouncer_x -= 2.0;
if(key[KEY_RIGHT] && bouncer_x <= SCREEN_W - BAR_W - 2.0)
bouncer_x += 2.0;
redraw = true;
}
else if(ev.type == ALLEGRO_EVENT_JOYSTICK_AXIS
&& ev.joystick.stick == 0
&& ev.joystick.axis == 0)
{
float joypos=ev.joystick.pos;
if(joypos<0 && bouncer_x >= 2.0)
bouncer_x-=joypos;
if(joypos>0 && bouncer_x <= SCREEN_W - BAR_W - 2.0)
bouncer_x+=joypos;
if(joypos=0)
bouncer_x=SCREEN_W/2;
}
else if(ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
break;
else if(ev.type == ALLEGRO_EVENT_KEY_DOWN)
{
switch(ev.keyboard.keycode)
{
case ALLEGRO_KEY_LEFT:
key[KEY_LEFT] = true;
break;
case ALLEGRO_KEY_RIGHT:
key[KEY_RIGHT] = true;
break;
}
}
else if(ev.type == ALLEGRO_EVENT_KEY_UP)
{
switch(ev.keyboard.keycode)
{
case ALLEGRO_KEY_LEFT:
key[KEY_LEFT] = false;
break;
case ALLEGRO_KEY_RIGHT:
key[KEY_RIGHT] = false;
break;
case ALLEGRO_KEY_ESCAPE:
doexit = true;
break;
}
}
if(redraw && al_is_event_queue_empty(event_queue))
{
std::string str=al_get_joystick_name(joystick);
redraw = false;
al_clear_to_color(al_map_rgb(0,0,0));
al_draw_bitmap(bouncer, bouncer_x, bouncer_y, 0);
al_draw_bitmap(bouncer, bouncer_y, bouncer_x, 0);
std::cout << ev.joystick.pos << " ";
std::cout << str << " ";
std::cout << al_get_joystick_active(joystick) << std::endl;
al_flip_display();
}
}
al_destroy_bitmap(bouncer);
al_destroy_timer(timer);
al_destroy_display(display);
al_destroy_event_queue(event_queue);
return 0;
}
Now, the trouble: ev.joystick.pos has a relatively static value (viewed trough MSVC2010 debugger), no matter if I have all the axis of my joystick at the max position.
Also, I don't know how to get the value of an specific axis of an specific stick. I managed to get the bar move only when an specific axis and stick changes, but not "how much" it changes.
Thanks in advance.
I can't see what you're doing wrong, but I got the controller working in my game, so maybe my code will shed some insight. By the way, I'm using an Xbox 360 controller. Actually, I'm using a GameStop brand 360 controller, so it's not technically official. Anyway, here's my relevant code (the full source is a monster):
if(ev.type == ALLEGRO_EVENT_JOYSTICK_AXIS){
if(ev.type == ALLEGRO_EVENT_JOYSTICK_AXIS){
if(ev.joystick.stick == 0){ //float joys[3][2]
joys[ev.joystick.stick][ev.joystick.axis] = ev.joystick.pos;
}
}
void SetPosition(){
int leftStick = 0;
int rightStick = 1;
int dPad = 2;
int x = 0;
int y = 1;
int z = 2;
bitmapX += joys[leftStick][x];
bitmapY += joys[leftStick][y];
}