SFML雪碧白方块 [英] SFML Sprite white square
问题描述
我昨天问了一个关于 SFML 平滑运动的问题...问题解决了,但这次我使用的精灵显示为一个白色方块.
I have asked a question about SFML smooth movement yesterday... and that problem was solved, but this time the sprite that im using is showing up as a white square.
我试图将精灵发送到 drawship
函数作为参考,但由于我在 main.cpp
上使用该函数,所以我无法执行上面的说明这个答案.所以我想知道如何解决这个问题.
I have tried to send the sprite to drawship
function as reference but since i am using that function on main.cpp
i am not able to do what is told on this answer. So Im wondering how I can fix this problem.
#include <SFML/Audio.hpp>
#include <SFML/Graphics.hpp>
#include "Spaceship.hpp"
#include <vector>
#include "ResourcePath.hpp"
int main(int, char const**)
{
// Create the main window
sf::RenderWindow window(sf::VideoMode(800, 600), "SpaceShuttle");
window.setFramerateLimit(30);
// Call to non-static member function without an object argument
// Set the Icon
sf::Image icon;
if (!icon.loadFromFile(resourcePath() + "space-shuttle.png")) {
return EXIT_FAILURE;
}
window.setIcon(icon.getSize().x, icon.getSize().y, icon.getPixelsPtr());
// Load a sprite to display
sf::Texture texture;
if (!texture.loadFromFile(resourcePath() + "bg.png")) {
return EXIT_FAILURE;
}
sf::Sprite sprite(texture);
// Create a graphical text to display
sf::Font font;
if (!font.loadFromFile(resourcePath() + "sansation.ttf")) {
return EXIT_FAILURE;
}
sf::Text text("SpaceShuttle K1LLM33K", font, 50);
text.setFillColor(sf::Color::White);
text.setPosition(100.0, 130.0);
// Load a music to play
/* sf::Music music; if (!music.openFromFile(resourcePath() + "nice_music.ogg")) { return EXIT_FAILURE; }
// Play the music
music.play();
*/
Spaceship spaceship(window);
sf::Clock sf_clock;
// Start the game loop
while (window.isOpen()) {
// Get time elapsed since last frame
float dt = sf_clock.restart().asSeconds();
// Process events
sf::Event event;
while (window.pollEvent(event)) {
// Close window: exit
if (event.type == sf::Event::Closed) {
window.close();
}
// Escape pressed: exit
if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Escape) {
window.close();
}
}
//move spaceship
if(sf::Keyboard::isKeyPressed(sf::Keyboard::Left)) { spaceship.moveship(dt, 'l'); }
else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Right)) { spaceship.moveship(dt, 'r'); }
else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) { spaceship.moveship(dt, 'u'); }
else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) { spaceship.moveship(dt, 'd'); }
// Clear screen
window.clear();
// Draw the sprite(s)
window.draw(sprite);
//
// To draw the Spaceship
//
spaceship.drawsprite(window);
// Draw the string(s)
window.draw(text);
// Update the window
window.display();
}
return EXIT_SUCCESS;
}
spaceship.cpp
#include <SFML/Audio.hpp>
#include <SFML/Graphics.hpp>
#include "ResourcePath.hpp"
#include "Spaceship.hpp"
Spaceship::Spaceship(sf::RenderWindow& game_window){
auto surface = game_window.getSize();
ss_x = ss_y = 0.5f;
ss_speed_x = 250.f / surface.x;
ss_speed_y = 250.f / surface.y;
ss_width = 128;
ss_height = 128;
ss_radius = ss_width/2;
sf::Texture ship;
if (!ship.loadFromFile(resourcePath() + "space-shuttle-64.png")) {
return EXIT_FAILURE;
}
ss_sprite = sf::Sprite(ship);
ss_sprite.setOrigin(ss_width / 2, ss_height / 2);
}
void Spaceship::drawsprite(sf::RenderWindow& game_window){
auto size = game_window.getSize();
ss_sprite.setPosition(ss_x * size.x, ss_y * size.y);
game_window.draw(ss_sprite);
}
void Spaceship::moveship(float dt, char move){
switch (move) {
case 'l': ss_x -= dt * ss_speed_x; break;
case 'r': ss_x += dt * ss_speed_x; break;
case 'u': ss_y -= dt * ss_speed_y; break;
case 'd': ss_y += dt * ss_speed_y; break;
}
}
Spaceship::~Spaceship(){}
太空飞船.hpp
#ifndef Spaceship_hpp
#define Spaceship_hpp
#include <iostream>
#include <SFML/Audio.hpp>
#include <SFML/Graphics.hpp>
#include <stdio.h>
using namespace std;
class Spaceship {
public:
Spaceship();
Spaceship(sf::RenderWindow&);
~Spaceship();
void moveship(float, char);
void drawsprite(sf::RenderWindow&);
private:
float ss_x, ss_y;
float ss_speed_x, ss_speed_y;
int ss_width, ss_height, ss_radius;
sf::Sprite ss_sprite;
};
#endif /* Spaceship_hpp */
推荐答案
根据 到文档,只要精灵使用它,纹理就必须存在.实际上,精灵不存储自己的纹理副本",所以只需移动 sf::Texture
从构造函数到 Spaceship
的成员应该修复它.
According to the docs, "The texture must exist as long as the sprite uses it. Indeed, the sprite doesn't store its own copy of the texture", so just moving the sf::Texture
from the constructor to a member of Spaceship
should fix it.
class Spaceship {
// Some stuff
sf::Texture ss_ship_texture;
};
Spaceship::Spaceship(const sf::RenderWindow& window) {
// Some stuff
ss_ship_texture.loadFromFile("path/to/ship/image");
ss_ship.setTexture(ss_ship_texture);
}
这篇关于SFML雪碧白方块的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!