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每当我运行这个程序时，按下按钮时“Car1”图片就会重复。我该如何解决这个问题？我找不到任何会导致这种情况的东西。提前感谢您的帮助。这是代码：

#include <iostream>
#include <SFML/Graphics.hpp>
using namespace std;


int main()
{   

//variables,etc

sf::RenderWindow window(sf::VideoMode(800,600), "Maze");
window.setFramerateLimit(60);
window.setKeyRepeatEnabled(false);
bool play = true;

bool Up = false;
bool rButton = false;
bool lButton = false;
bool down = false;

int xVelocity = 0, yVelocity = 0;
int xVelocity2 = 0; yVelocity2 = 0;
sf::Event event;
sf::Texture pic1;
pic1.loadFromFile("Data/Car1.png");

sf::Texture pic2;
pic2.loadFromFile("Data/Car2.png");

sf::RectangleShape road;
road.setSize(sf::Vector2f(100,200));
road.setPosition(100,220);
road.setFillColor(sf::Color::White);

sf::RectangleShape car1;
car1.setSize(sf::Vector2f(70,70));
car1.setPosition(0,0);
car1.setTexture(&pic1);

sf::RectangleShape car2;
car2.setSize(sf::Vector2f(70,70));
car2.setPosition(20,20);
car2.setTexture(&pic2);

//events 

while (play == true)
{
while(window.pollEvent(event))
{
if(event.type == sf::Event::Closed)
{
    play = false;
}
if(event.type == sf::Event::KeyPressed&&event.key.code==sf::Keyboard::Up)
{
Up = true;
}

if(event.type == sf::Event::KeyReleased&&event.key.code==sf::Keyboard::Up)
{
Up = false;
}

if(event.type == sf::Event::KeyPressed&&event.key.code==sf::Keyboard::Right)
{
rButton = true;
}

if(event.type == sf::Event::KeyReleased&&event.key.code==sf::Keyboard::Right)
{
rButton = false;
}

if(event.type == sf::Event::KeyPressed&&event.key.code==sf::Keyboard::Left)
{
lButton = true;
}

if(event.type == sf::Event::KeyReleased&&event.key.code==sf::Keyboard::Left)
{
lButton = false;
}


if(event.type == sf::Event::KeyPressed&&event.key.code==sf::Keyboard::Down)
{
down = true;
}

if(event.type == sf::Event::KeyReleased&&event.key.code==sf::Keyboard::Down)
{
down = false;
}

//Logic

if (rButton == true)
{
xVelocity = 5;
}
if(lButton == true)
{
 xVelocity = 5;
}

 if(lButton ==false&&rButton==false)
 {
 xVelocity = 0;
 }
 if(down == true)
 {
 yVelocity = 5;
 }

 if(Up == true)
 {
 yVelocity = -5;
 }

 if(Up && down == false)
 {
 yVelocity = 0;
 }

car1.move(xVelocity,yVelocity);



window.draw(car1);
window.draw(car2);
window.draw(road);
window.display();


}
}
}
4

1 回答 1

1

在渲染每一帧之前，您需要使用RenderWindow::Clear清除渲染表面。

于 2013-02-21T04:38:13.430 回答