Messages

1

General / Re: Rotate against sprite

« on: March 22, 2016, 12:04:16 am »

I am currently using this code:

Code: [Select]

enemy->setOrigin(enemy->getGlobalBounds().width / 2, enemy->getGlobalBounds().height / 2);

float degrees = atan2(this->getPosition().y - enemy->getPosition().y, this->getPosition().x - enemy->getPosition().x) * 180 / PI;
degrees -= 90;

this->setRotation(degrees);

degrees -= 90;

if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Space) && !this->spaceKey){
this->entityManager->Add("Bullet", new Bullet(this->map, this->getPosition().x, this->getPosition().y, degrees, 500));
}

But I don't think I should have to add the -90. Also how should I fix the bullets. As I am shooting and the enemy is moving up, it does not hit the enemy

2

General / Re: Rotate against sprite

« on: March 21, 2016, 08:53:59 pm »

Does this seem right:


        float angle = atan2(this->getPosition().y - enemy->getPosition().y, this->getPosition().x - enemy->getPosition().x);
        float degrees = angle * 180 / PI;

        this->setRotation(degrees);

3

General / Re: Rotate against sprite

« on: March 21, 2016, 08:15:05 pm »

Yes, thanks, just had about IT in school

4

General / Re: Rotate against sprite

« on: March 21, 2016, 08:05:14 pm »

I know how to rotate a sprite. I am wondering how do i rotate the tower towards the enemy that is moving

5

General / Rotate against sprite

« on: March 21, 2016, 07:49:22 pm »

Hi, I am trying to make a tower defence game. I have made the map, which loads files so I don't have to rewrite everything, an enemy that moves within the path, and bullets. Since I am making a tower defence game, I think I should rotate the tower against the enemy. What is the algorithm, or how should I do it?

6

General / Re: C++ Lua scripting tutorial

« on: February 01, 2016, 08:34:05 pm »

Yes, or make a game, I would like to see how to implement them togheter.

7

General / C++ Lua scripting tutorial

« on: February 01, 2016, 05:24:41 pm »

Hi, I did not know where to put this, so I just put it here. I am kind off new to sfml programming, but i know much c++. I have read that lua is a great scripting language. So I am wondering if there is any c++, lua, sfml tutorials out there?

8

SFML projects / Strategy, building Hospital/Mall

« on: February 01, 2016, 12:52:08 pm »

Hi, I am a little new to SFML but know C++, I am planning on making a game like Prison Architect but with a hospital, or shopping mall. But I am wondering if someone wanted to work with me, PM me if interessted, or reply here with your skype or email.

9

General / Scrolling Background

« on: January 20, 2016, 05:38:16 pm »

Hi, I am trying to make a platform game, and have made an animation sprite, and a scrolling background by myself. I tried to make a scrolling background when I am walking backwards but I can't make it. Here is the relevant code. How can I make it so it will scroll if i walk backwards?

Code: [Select]

void main_game::ScrollingBackground(){
if (background1->getPosition().x < -background1->getGlobalBounds().width){
std::cout << "Out on the right side\n";
this->background1->setPosition(sf::Vector2f(this->background1->getGlobalBounds().width - 1, -50));
}
else if (background2->getPosition().x < -background2->getGlobalBounds().width){
std::cout << "Out on the right side\n";
this->background2->setPosition(sf::Vector2f(this->background2->getGlobalBounds().width - 1, -50));
}
}



10

General / DeltaTime

« on: January 11, 2016, 08:59:40 pm »

Hi, I am new to SFML and trying to make a moving rectangle. I am wondering if this is the correct use of deltaTime

while (window.isOpen()){
                sf::Event event;
               
                time = clock.restart();
                float dt = time.asSeconds();

                while (window.pollEvent(event)){

                        sf::Vector2f playerXY;
                       
                        if (acceleration > 1)
                                acceleration = 1;

                        if (event.type == sf::Event::Closed)
                                window.close();

                        else if (sf::Keyboard::isKeyPressed(sf::Keyboard::A)){
                                acceleration += 0.1;
                                playerXY = sf::Vector2f(-150.0f * dt, 0.0f);
                        }

                        else if (sf::Keyboard::isKeyPressed(sf::Keyboard::D)){
                                acceleration += 0.1;
                                playerXY = sf::Vector2f(150.0f * dt, 0.0f);
                        }
                        else{
                                acceleration = 0.2;
                        }

                        std::cout << dt << std::endl;

                        playerXY *= acceleration;

                        player.move(playerXY);
                       
                }
                window.clear();
                window.draw(player);
                window.display();
        }
 

11

General / Loading texture failing

« on: July 28, 2015, 11:32:55 pm »

Hi, im new to SFML and trying to load a texture. But I get an error message
failed to load image "images/SplashScreen.png". Reason: Unable to open file.
I have added the images folder to every class but it wont work. Does anyone know why? I use SDML 2.3

12

General / Re: SFML Window Quiting when I start program

« on: July 28, 2015, 04:12:02 pm »

Thanks it worked

13

General / SFML Window Quiting when I start program

« on: July 28, 2015, 03:12:54 pm »

Hi, I just started at a pang tutorial. It's made from SFML 1.6 but I have found and corrected what's wrong and updated it to the newest version. But I seem to have a error, whenever I load the window it quits. I can't seem to find out whats wrong. Heres my code

Game.h:

I have added the headers and everything else

Code: [Select]

public:
static void Start();

private:
static bool IsExisting();
static void GameLoop();

enum GameState { Unititialized, ShowingSplash, Paused,
ShowingMenu, Playing, Exiting };

static GameState _gameState;
static sf::RenderWindow _mainWindow;

Game.cpp

Code: [Select]

#include "stdafx.h"
#include "Game.h"

void Game::Start(void)
{
if (_gameState != Unititialized)
return;

_mainWindow.create(sf::VideoMode(1024, 768, 32), "Pang!");
_gameState = Game::Playing;

while (!IsExisting())
{
GameLoop();
}

_mainWindow.close();
}

bool Game::IsExisting()
{
if (_gameState == Game::Exiting)
return false;
else
return true;
}

void Game::GameLoop()
{
sf::Event currentEvent;
while (_mainWindow.pollEvent(currentEvent))
{

switch (_gameState)
{
case Game::Playing:
{
_mainWindow.clear(sf::Color(255, 0, 0));
_mainWindow.display();

if (currentEvent.type == sf::Event::Closed)
{
_gameState = Game::Exiting;
}
break;
}
}
}
}


Game::GameState Game::_gameState = Unititialized;
sf::RenderWindow Game::_mainWindow;

stadfax.h:

Code: [Select]

#pragma once

#include "targetver.h"

#include <stdio.h>
#include <tchar.h>

#include <SFML/System.hpp>
#include <SFML/Graphics.hpp>
#include <SFML/Window.hpp>
#include <SFML/Audio.hpp>

#include <map>
#include <iostream>
#include <cassert>

Thanks in advance

14

General / Rotate sprite around mouse

« on: June 12, 2015, 04:30:35 pm »

Hi,
I have been trying SFML for 3 weeks soon. I've found this thing about rotating a sprite around the mouse. From long range it looks good. But the clooser it comes the more unaccurat it becomes. My image is 960 x 540

Heres the relevant code:

Game::Game()
   : mWindow(sf::VideoMode(WindowWidth, WindowHeight), WindowName, sf::Style::Close)
   , mPlayerTexture()
   , mPlayer()
   , mIsMovingDown(false)
   , mIsMovingLeft(false)
   , mIsMovingRight(false)
   , mIsMovingUp(false)
{
   if (!mPlayerTexture.loadFromFile("Media/Texture/eagle.png"))
   { }
   mPlayer.setTexture(mPlayerTexture);
   mPlayer.setScale(sf::Vector2f(0.25, 0.25));
   mPlayer.setOrigin(sf::Vector2f(120.f, 135.f));
}

void Game::lookAtMouse(sf::RenderWindow &win)
{
   sf::Vector2f curPos = mPlayer.getPosition();
   sf::Vector2i position = sf::Mouse::getPosition(win);

   const float PI = 3.14159265;

   float dx = curPos.x - position.x;
   float dy = curPos.y - position.y;

   float rotation = (atan2(dy, dx)) * 180 / PI;

   mPlayer.setRotation(rotation + 180);
}