Messages

16

Graphics / White box glitch when creating multiple objects in a loop

« on: October 10, 2016, 11:12:29 pm »

I know about the white box drawing error when you load things wrong, and I fixed that in previous programs. But I can't figure out how to prevent this from happening when I create multiple objects in a loop and add them to a list. Here is my code:

Platform.h

#ifndef PLATFORM_H
#define PLATFORM_H
#include <SFML/Graphics.hpp>
#include <iostream>

using namespace sf;
using namespace std;

class Platform {
    private:
        string textStr;
        Sprite sprite;
        Texture image;
        Texture t;
    public:
        Platform(string, int, int, int, int);
        Sprite getSprite();
        Texture getTexture();
        string getTextureStr();
};

#endif // PLATFORM_H
 

Platform.cpp

#include "Platform.h"
#include <SFML/Graphics.hpp>

using namespace sf;

//  Default constructor
Platform::Platform(string ima, int x, int y, int w, int h) {
    //  Setting a texture to the path input
    image.loadFromFile(ima);
    //  Setting it so it keeps drawing the texture to the sprite
    image.setRepeated(true);
    //  Setting the private path to the path input
    textStr = ima;
    //  Setting the sprite to the texture, creating the rect and setting the position
    sprite.setTexture(image);
    sprite.setTextureRect(IntRect(x, y, w * 40, h * 40));
    sprite.setPosition(x, y);
}

//  Sprite returning function
Sprite Platform::getSprite() {
    return sprite;
}

//  Texture returning function
Texture Platform::getTexture() {
    return image;
}

string Platform::getTextureStr() {
    return textStr;
}
 

relevant parts of main.cpp

//  Creating a vector that contains all the platforms
vector<Platform> platforms;

//  An array of all the platforms in level 1 - x, y, width and height (in pixels)
int level1[] = {100, 600, 8, 1};

//  Looping through all the ints in the level list, and creating platforms
for (unsigned i = 0; i < (sizeof(level1)/4) - 1; i += 4) {
    platforms.push_back(Platform("brick.png", level1[i], level1[i + 1], level1[i + 2], level1[i + 3]));
}

 

17

Graphics / Re: How to move sprite with keyboard?

« on: October 10, 2016, 11:05:08 pm »

Sprite.move(int x, int y);
 

this function moves the sprite in either direction, so you could say

using namespace sf;

int changeX = 0;
int changeY = 0;
 

and then when you poll for events in the game loop

if (isKeyPressed(Keyboard::A)) {
    changeX = -2;
} else if (isKeyPressed(Keyboard::D) {
    changeX = 2;
} else {
    changeX = 0;
} if (isKeyPressed(Keyboard::W) {
    changeY = -2;
} else if (isKeyPressed(Keyboard::S)) {
    changeY = 2;
} else {
    changeY = 0;
}
 

and when your updating

Sprite.move(changeX, changeY);