我在Linux Mint 18.1上使用C++ 17學習了使用GUI的SFML 2.3.2。作爲Hello World之後的第二個項目,我試圖重新制作Snake,這款遊戲舊手機已經預裝了。大部分的東西一直工作到現在,除了一些小例外,我將不得不在稍後處理,一些由遊戲尚未完全完成。使用SFML中的精靈不顯示圖像
只是爲了確保正確理解此事,因爲我以前從未使用過較低級語言的GUI和圖像。首先將圖像加載到紋理中,然後將紋理添加到sprite,然後將該sprite繪製到窗口上?
該程序完美編譯,正確初始化所有內容,並且運行時沒有任何重大不明原因的問題。除了圖像不顯示。精靈在那裏,並以默認的單色背景顏色顯示,但不顯示任何圖像。
我該怎麼做,我該如何解決?謝謝!
// HEADERS
#include <iostream>
#include <SFML/Graphics.hpp>
#include <SFML/Graphics/Color.hpp>
#include <SFML/Graphics/Font.hpp>
#include <SFML/Graphics/Image.hpp>
#include <SFML/Graphics/Rect.hpp>
#include <SFML/Graphics/Sprite.hpp>
#include <SFML/Graphics/Texture.hpp>
#include <SFML/System/String.hpp>
#include <SFML/Window/Keyboard.hpp>
// CREATE NEW FONT
sf::Font create_font()
{
sf::Font f;
bool id = f.loadFromFile("/usr/share/fonts/truetype/ubuntu-font-family/Ubuntu-B.ttf");
if (id == false)
{
std::cerr << "Font:\tCould not be loaded." << std::endl;
}
else
{
std::cerr << "Font:\tLoaded successfully." << std::endl;
}
return f;
}
// CREATE NEW SPRITE USING TEXTURE, GIVEN ARE PATH WITH COORDINATES AND DIMENSIONS
sf::Sprite load_img(std::string path, long x, long y, long w, long h)
{
sf::Texture t;
bool id = t.loadFromFile(path);
if (id == false)
{
std::cerr << "Texture:\t" << path << "\tFailed to load." << std::endl;
}
else
{
std::cerr << "Texture:\t" << path << "\tLoaded successfully." << std::endl;
}
sf::Sprite s(t);
s.setTextureRect(sf::IntRect((int)x, (int)y, (int)w, (int)h));
s.setPosition(x, y);
return s;
}
// MAIN FUNCTION
int main()
{
// DECLARING/DEFINING VARIABLES
unsigned long window_width = 512;
unsigned long window_height = 512;
unsigned long score = 0;
unsigned long head_old_position_x, head_old_position_y;
std::string title = "Snek";
std::string wdir = "/home/kate/Documents/coding/snek/";
// WINDOW
sf::RenderWindow window(sf::VideoMode(window_width, window_height), title);
window.setFramerateLimit(60);
// SPRITES
sf::Sprite background = load_img(wdir + "img/background.png", 0, 0, 512, 512);
sf::Sprite head = load_img(wdir + "img/head.png", 47, 39, 8, 8);
sf::Sprite body = load_img(wdir + "img/body.png", 39, 39, 8, 8);
sf::Sprite poison = load_img(wdir + "img/poison.png", 119, 119, 8, 8);
sf::Sprite trap = load_img(wdir + "img/trap.png", 159, 159, 8, 8);
sf::Sprite candy = load_img(wdir + "img/candy.png", 199, 199, 8, 8);
// FONT
sf::Font font = create_font();
// TEXT
sf::Text score_display(title, font, 20);
sc// HEADERS
#include <iostream>
#include <SFML/Graphics.hpp>
#include <SFML/Graphics/Color.hpp>
#include <SFML/Graphics/Font.hpp>
#include <SFML/Graphics/Image.hpp>
#include <SFML/Graphics/Rect.hpp>
#include <SFML/Graphics/Sprite.hpp>
#include <SFML/Graphics/Texture.hpp>
#include <SFML/System/String.hpp>
#include <SFML/Window/Keyboard.hpp>
// CREATE NEW FONT
sf::Font create_font()
{
sf::Font f;
bool id = f.loadFromFile("/usr/share/fonts/truetype/ubuntu-font-family/Ubuntu-B.ttf");
if (id == false)
{
std::cerr << "Font:\tCould not be loaded." << std::endl;
}
else
{
std::cerr << "Font:\tLoaded successfully." << std::endl;
}
return f;
}
// CREATE NEW SPRITE USING TEXTURE, GIVEN ARE PATH WITH COORDINATES AND DIMENSIONS
sf::Sprite load_img(std::string path, long x, long y, long w, long h)
{
sf::Texture t;
bool id = t.loadFromFile(path);
if (id == false)
{
std::cerr << "Texture:\t" << path << "\tFailed to load." << std::endl;
}
else
{
std::cerr << "Texture:\t" << path << "\tLoaded successfully." << std::endl;
}
sf::Sprite s(t);
s.setTextureRect(sf::IntRect((int)x, (int)y, (int)w, (int)h));
s.setPosition(x, y);
return s;
}
// MAIN FUNCTION
int main()
{
// DECLARING/DEFINING VARIABLES
unsigned long window_width = 512;
unsigned long window_height = 512;
unsigned long score = 0;
unsigned long head_old_position_x, head_old_position_y;
std::string title = "Snek";
std::string wdir = "/home/kate/Documents/coding/snek/";
// WINDOW
sf::RenderWindow window(sf::VideoMode(window_width, window_height), title);
window.setFramerateLimit(60);
// SPRITES
sf::Sprite background = load_img(wdir + "/img/background.png", 0, 0, 512, 512);
sf::Sprite head = load_img(wdir + "/img/head.png", 47, 39, 8, 8);
sf::Sprite body = load_img(wdir + "/img/body.png", 39, 39, 8, 8);
sf::Sprite poison = load_img(wdir + "/img/poison.png", 119, 119, 8, 8);
sf::Sprite trap = load_img(wdir + "/img/trap.png", 159, 159, 8, 8);
sf::Sprite candy = load_img(wdir + "/img/candy.png", 199, 199, 8, 8);
// FONT
sf::Font font = create_font();
// TEXT
sf::Text score_display(title, font, 20);
score_display.setString(std::to_string(score));
score_display.setPosition(5, 5);
// LOOP
while (window.isOpen())
{
sf::Event event;
while (window.pollEvent(event))
{
if (event.type == sf::Event::Closed)
{ window.close(); }
head_old_position_x = head.getPosition().x;
head_old_position_y = head.getPosition().y;
// MOVEMENT BASED ON KEYBOARD INPUT
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
{
head.setPosition(head.getPosition().x - 8, head.getPosition().y);
body.setPosition(head_old_position_x, head_old_position_y);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
{
head.setPosition(head.getPosition().x, head.getPosition().y - 8);
body.setPosition(head_old_position_x, head_old_position_y);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
{
head.setPosition(head.getPosition().x + 8, head.getPosition().y);
body.setPosition(head_old_position_x, head_old_position_y);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
{
head.setPosition(head.getPosition().x, head.getPosition().y + 8);
body.setPosition(head_old_position_x, head_old_position_y);
}
if (body.getPosition().x == candy.getPosition().x && body.getPosition().y == candy.getPosition().y)
{
score ++;
score_display.setString(std::to_string(score));
}
// REFRESH WINDOW
window.clear();
window.draw(background);
window.draw(head);
window.draw(body);
window.draw(poison);
window.draw(trap);
window.draw(candy);
window.draw(score_display);
window.display();
}
}
return 0;
}
ore_display.setString(std::to_string(score));
score_display.setPosition(5, 5);
// LOOP
while (window.isOpen())
{
sf::Event event;
while (window.pollEvent(event))
{
if (event.type == sf::Event::Closed)
{ window.close(); }
head_old_position_x = head.getPosition().x;
head_old_position_y = head.getPosition().y;
// MOVEMENT BASED ON KEYBOARD INPUT
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
{
head.setPosition(head.getPosition().x - 8, head.getPosition().y);
body.setPosition(head_old_position_x, head_old_position_y);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
{
head.setPosition(head.getPosition().x, head.getPosition().y - 8);
body.setPosition(head_old_position_x, head_old_position_y);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
{
head.setPosition(head.getPosition().x + 8, head.getPosition().y);
body.setPosition(head_old_position_x, head_old_position_y);
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
{
head.setPosition(head.getPosition().x, head.getPosition().y + 8);
body.setPosition(head_old_position_x, head_old_position_y);
}
if (body.getPosition().x == candy.getPosition().x && body.getPosition().y == candy.getPosition().y)
{
score ++;
score_display.setString(std::to_string(score));
}
// REFRESH WINDOW
window.clear();
window.draw(background);
window.draw(head);
window.draw(body);
window.draw(poison);
window.draw(trap);
window.draw(candy);
window.draw(score_display);
window.display();
}
}
return 0;
}
控制檯中是否有任何消息? –
不顯示圖像的常見原因是因爲紋理超出了範圍,或者無法加載。 –
@ArnavBorborah不,沒有任何SFML功能。我自己的錯誤檢查確認一切*應該*按預期工作。 – Katembers