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« on: October 02, 2010, 05:54:46 am »
I'm trying to put together an asteroid clone, but nothing's being drawn in my window. I was going through the tutorials, and was able to load a sprite image, display it on the screen, and get keyboard input to get the sprite to move. Then I started a new project. The only thing I did different was make a class called Ship for the ship in the asteroids game.
To make sure I installed SFML 1.6 correctly, I copied and pasted the source code from the project I made from the tutorials, and it was able to display the sprite. Here's my source code:
main.cpp
/*
* Headers, will add later
*/
#include <SFML/Graphics.hpp>
#include "Ship.h"
int main()
{
// Create the main rendering window
sf::RenderWindow App(sf::VideoMode(800, 600, 32), "Asteroid Clone");
//Loading ship image
Ship ship1;
ship1.loadImage("ship.png");
while(App.IsOpened())
{
sf::Event Event;
while (App.GetEvent(Event))
{
// Close window : exit
if (Event.Type == sf::Event::Closed)
App.Close();
}
if(App.GetInput().IsKeyDown(sf::Key::Up))
ship1.moveForward(App);
if(App.GetInput().IsKeyDown(sf::Key::Right))
ship1.rotateRight(App);
if(App.GetInput().IsKeyDown(sf::Key::Left))
ship1.rotateLeft(App);
}
App.Clear(sf::Color(0, 0, 0));
//Drawing of sprites
ship1.drawShip(App);
App.Display();
return EXIT_SUCCESS;
}
Ship.h
/*
* Ship.h
* Header file for the ship in the asteroids game
*/
#include <SFML/Graphics.hpp>
#include <string>
using namespace std;
class Ship
{
public:
void loadImage(string imagefilename); // Function loads image and turns it into a sprite
void rotateRight(sf::RenderWindow &game);
void rotateLeft(sf::RenderWindow &game);
void moveForward(sf::RenderWindow &game);
void drawShip(sf::RenderWindow &game);
private:
sf::Sprite shipSprite;
float directionfacingX;
float directionfacingY;
};
Ship.cpp
/*
* Ship.cpp
* Implementation file for the Ship class
*/
#include <SFML/Graphics.hpp>
#include <string>
#include <cmath>
#include <iostream>
using namespace std;
#include "Ship.h"
// This function loads an image, then converts it to a sprite
void Ship::loadImage(string imagefilename)
{
sf::Image Image;
if (!Image.LoadFromFile(imagefilename))
cout << "Error loading file" << endl;
shipSprite.SetImage(Image);
directionfacingX = 0.0;
directionfacingY = 0.0;
shipSprite.SetColor(sf::Color(0,255,255,128));
shipSprite.SetCenter(10,10);
}
// Used when right arrow key is hit
// Rotates the image and sets new X and Y for movement
void Ship::rotateRight(sf::RenderWindow &game)
{
float ElapsedTime = game.GetFrameTime();
shipSprite.Rotate(-100 * ElapsedTime);
directionfacingX = cos((shipSprite.GetRotation()*3.14)/180);
directionfacingY = sin((shipSprite.GetRotation()*3.14)/180);
}
// Used when left arrow key is hit
// Rotates the image and sets new X and Y for movement
void Ship::rotateLeft(sf::RenderWindow &game)
{
float ElapsedTime = game.GetFrameTime();
shipSprite.Rotate(+100 * ElapsedTime);
directionfacingX = cos((shipSprite.GetRotation()*3.14)/180);
directionfacingY = sin((shipSprite.GetRotation()*3.14)/180);
}
void Ship::moveForward(sf::RenderWindow &game)
{
float ElapsedTime = game.GetFrameTime();
shipSprite.Move(directionfacingX, directionfacingY);
}
void Ship::drawShip(sf::RenderWindow &game)
{
game.Draw(shipSprite);
}
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