Quote:Original post by Unwise owl
My god, is that indentation caused by the transfer from code to forums or do you acually write like that? Putting the semicolons before the following statements is NOT the standard approach, eg. ";dtime = elapsed_time / 1000".
ifdef WIN32#pragma comment(lib, "SDL.lib")#pragma comment(lib, "SDLmain.lib")#endif#include "SDL.h"#include <stdlib.h>;void run(){ float start_time; start_time = SDL_GetTicks(); int i; i=5 // loop while(i=5) { float dtime; float end_time; float elapsed_time; float vvlosity; vvlosity = 5; SDL_Rect dest; dest.x = 2; dest.y = 2; end_time = SDL_GetTicks(); // now we have how much time passed in the last loop elapsed_time = end_time - start_time; // here's the new code, dtime must be a floating point number dtime = elapsed_time / 1000; // Get new start time start_time = SDL_GetTicks(); dest.x=dest.x + dtime *vvlosity; dest.y = dest.y + dtime *vvlosity; // end loop } int main( int argc, char* argv[] ) { //initialize systems SDL_Init ( SDL_INIT_VIDEO ) ; //set our at exit function atexit ( SDL_Quit ) ; SDL_Surface * screen = SDL_SetVideoMode( 800,600, 24, SDL_ANYFORMAT|SDL_DOUBLEBUF ); SDL_Surface * img = SDL_LoadBMP( "filename.bmp" ); SDL_Rect dest; dest.x = 2; dest.y = 2; SDL_Event event; SDL_Event a; SDL_Event b; SDL_Event Event; SDL_Rect coord; coord.x = 200; coord.y = 500; SDL_Surface * tdisplay = SDL_SetVideoMode( 800,600,24,SDL_ANYFORMAT|SDL_DOUBLEBUF ); SDL_Surface * imi = SDL_LoadBMP( "ad.bmp" ); SDL_Surface * bckg = SDL_LoadBMP ( "bg.bmp" ); Uint32 now; ; while(true) { SDL_BlitSurface(img,NULL,screen, &dest); SDL_PollEvent(&event); if(event.type == SDL_MOUSEBUTTONDOWN) { if(event.button.button == SDL_BUTTON_LEFT) { SDL_GetMouseState(&coord.x, &coord.y); SDL_BlitSurface(imi,NULL,tdisplay,&coord); SDL_Flip(tdisplay); ; } } } if(event.type == SDL_QUIT) { return 0; } SDL_Event up; while(true) { if(up.type == SDL_KEYDOWN) { if(up.key.keysym.sym == SDLK_SPACE) { run(); } } } } atexit(SDL_Quit); return run(); ;}
#ifdef WIN32#pragma comment(lib, "SDL.lib")#pragma comment(lib, "SDLmain.lib")#endif#include "SDL.h"#include <stdlib.h>; // <--- what is this semicolon for???void run(){ float start_time; start_time = SDL_GetTicks(); // loop while(true) // <--- ???? { float dtime; float end_time; float elapsed_time; float vvlosity; vvlosity = 5; SDL_Rect dest; dest.x = 2; dest.y = 2; end_time = SDL_GetTicks(); // now we have how much time passed in the last loop elapsed_time = end_time - start_time; // here's the new code, dtime must be a floating point number dtime = elapsed_time / 1000; // Get new start time start_time = SDL_GetTicks(); dest=dest + dtime *vvlosity; // end loop }} // <--- end run() function int main( int argc, char* argv[] ) { ; // <--- ???? // AFAIK you need to call SDL_Init() first... SDL_Surface * screen = SDL_SetVideoMode( 800,600, 24, SDL_ANYFORMAT|SDL_DOUBLEBUF ); SDL_Surface * img = SDL_LoadBMP( "filename.bmp" ); SDL_Rect dest; dest.x = 2; dest.y = 2; SDL_Event event; SDL_Event a; SDL_Event b; SDL_Event Event; SDL_Rect coord; coord.x = 200; coord.y = 500; // I didn't use SDL for years, but this is certainly wrong! // Why do you chenge the video mode again? SDL_Surface * tdisplay = SDL_SetVideoMode( 800,600,24,SDL_ANYFORMAT|SDL_DOUBLEBUF ); SDL_Surface * imi = SDL_LoadBMP( "ad.bmp" ); SDL_Surface * bckg = SDL_LoadBMP ( "bg.bmp" ); SDL_Flip( screen ); Uint32 now; ; // <--- ???? while(true) // <--- ???? { SDL_BlitSurface(img,NULL,screen, &dest); SDL_PollEvent(&event); if(event.type == SDL_MOUSEBUTTONDOWN) { if(event.button.button == SDL_BUTTON_LEFT) { SDL_BlitSurface(imi,NULL,tdisplay,&coord); SDL_Flip(tdisplay); ; // <--- ???? } } } if(event.type == SDL_QUIT) // <--- ???? { return 0; } SDL_Event up; while(true) // <--- ???? { if(up.type == SDL_KEYDOWN) { if(up.key.keysym.sym == SDLK_SPACE) { run(); } } } } atexit(SDL_Quit); // <--- ???? you already did that... return run(); ; // <--- ????}Quote:Original post by MPG
Ok I pput what neede to be in a into one big loop. In my run function would i still need a loop?
Quote:
EDIT: darookie, I don't know how thoose semi-colons got there ut,there not in my editor.
#ifdef WIN32# pragma comment(lib, "SDL.lib")# pragma comment(lib, "SDLmain.lib")#endif#include <SDL/SDL.h> // <-- you might need to change that into #include "sdl.h"#include <cstdio>#include <cstdlib> // window setup - change to 800 and 600 if you likestatic const int WINDOW_WIDTH = 640;static const int WINDOW_HEIGHT= 480;// Initialise SDL// - returns boolean result: true if succeeded false// otherwisebool Initialise() { if (SDL_Init(SDL_INIT_VIDEO) < 0) { fprintf(stderr, "Could not initialize SDL: %s\n", SDL_GetError()); return false; } atexit(SDL_Quit); return true;}// Setup SDL video mode// - returns Screen surface or NULL pointer on failureSDL_Surface *SetupVideoMode() { SDL_Surface *screen = 0; screen = SDL_SetVideoMode(WINDOW_WIDTH, WINDOW_HEIGHT, 16, SDL_SWSURFACE|SDL_ANYFORMAT|SDL_DOUBLEBUF); if( !screen ) { fprintf(stderr, "Couldn't create a surface: %s\n", SDL_GetError()); } return screen;} // Main program entry pointint main(int argc, char *argv[]) { // step 1) - initialisation if (!Initialise()) { return -1; } // step 2) - setup video mode SDL_Surface *screen = SetupVideoMode(); if (!screen) { return -2; } // step 3) - load resources SDL_Surface * background; // this is my background image, it matches the window size SDL_Surface * sprite; // some small sprite image background = SDL_LoadBMP("bkgnd.bmp"); sprites = SDL_LoadBMP("sprites.bmp"); if (!background || !sprites) { fprintf(stderr, "Failed to load image: %s\n", SDL_GetError()); return -3; } // the position of the sprite on screen SDL_Rect spritePosition; spritePosition.x = 0; spritePosition.y = WINDOW_HEIGHT / 2; // place it somewhere in the middle of the window // step 4) - event loop SDL_Event event; bool exitRequested = false; // this flag terminates the loop when set to "true" while (!exitRequested) { // draw background and sprite SDL_BlitSurface(background, 0, screen, 0); SDL_BlitSurface(sprites, 0, screen, &spritePosition); // check for events while (SDL_PollEvent(&event)) { switch (event.type) { case SDL_QUIT: exitRequested = true; break; case SDL_KEYDOWN: switch (event.key.keysym.sym) { // escape key exits case SDLK_ESCAPE: exitRequested = true; break; // hitting left cursor moves the prite left case SDLK_LEFT: if (spritePosition.x > 0) spritePosition.x += 4; break; // same as above but in the other direction case SDLK_RIGHT: if (spritePosition.x < WINDOW_WIDTH-60) spritePosition.x += 4; break; default: break; } break; } } // update screen content SDL_Flip(screen); } return 0;}
