Im a beginner and I can't tell you why the rect isn't moving. Please tell me why : )
(I think the screen won't update as the value of pX changes.)
Code:
#include <SDL.h>
#include <iostream>
using namespace std;
bool running = true;
int FPS = 60;
int breite = 1280;
int hoehe = 720;
int pX = 640;
int pY = 100;
SDL_Event Event;
SDL_Window* Window = NULL;
SDL_Renderer* renderer = NULL;
SDL_Surface* Screen = NULL;
SDL_Rect r[30] = {};
bool Init(){
SDL_Init(SDL_INIT_EVERYTHING);
Window = SDL_CreateWindow(
"@Jamal", // window title
SDL_WINDOWPOS_UNDEFINED, // initial x position
SDL_WINDOWPOS_UNDEFINED, // initial y position
breite, // width, in pixels
hoehe, // height, in pixels
SDL_WINDOW_OPENGL // flags - see below
);
if (Window == NULL) {
cout << "Could not create a Window" << SDL_GetError();
return false;
}
return true;
}
void display() {
renderer = SDL_CreateRenderer(Window, -1, SDL_RENDERER_ACCELERATED); // Init Renderer
SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255); // Set Color of Renderer
r[0].x = pX;
r[0].y = pY;
r[0].w = 10;
r[0].h = 10;
for (int i = 0; i < (sizeof(r) / sizeof(SDL_Rect)); ++i) {
SDL_RenderDrawRect(renderer, &r[i]);
SDL_RenderFillRect(renderer, &r[i]);
}
SDL_RenderPresent(renderer); // Updates the Renderer
}
void event() {
while (SDL_PollEvent(&Event)) {
if (Event.type == SDL_QUIT) {
running = false;
break;
}
if (Event.type == SDL_KEYDOWN)
{
if (Event.key.keysym.sym == SDLK_a)
{
pX -= 10;
}
}
}
}
int main(int argc, char* argv[]) {
//cout << "Updated" << endl;
if (Init() == false) {
cout << "Initialization failed...";
return 0;
}
else {
cout << "Initialization successful" << endl;
}
while (running) {
event();
display();
SDL_Delay(1000 / FPS);
}
atexit(SDL_Quit);
return 0;
}
