c++ - 3D / FPS Camera Issues - SDL2 -

-

i got problem code, i'm trying make first person 3d camera. use sdl_getkeyboardstate(null) pressed keys.

when press 1 of defined keys nothing happens, why?

camera (controll):

void control(float movevel, float mousevel, bool mi, sdl_window* window) { if (mi)  //if mouse in screen {     int midx = 640 / 2;   //middle of screen     int midy = 480 / 2;     sdl_showcursor(sdl_disable);    //we don't show cursor     int tmpx, tmpy;     sdl_getmousestate(&tmpx, &tmpy); //get current position of cursor     camyaw += mousevel*(midx - tmpx);   //get rotation, example, if mouse current position 315, 5*0.2, y     campitch += mousevel*(midy - tmpy); //this x     lockcamera();     //sdl_warpmouse(midx, midy);       //move cursor center of screen     sdl_warpmouseinwindow(window, midx, midy);      const uint8* kstate = sdl_getkeyboardstate(null);      if (kstate[sdlk_w])     {         if (campitch != 90 && campitch != -90)         {       //if facing directly or down, don't go forward, commented out, when there gravity             movecamera(movevel, 0.0);        //move forward         }          movecameraup(movevel, 0.0);      //move up/down     }      if (kstate[sdlk_s])     {         //same, use 180 degrees, move @ different direction (move back)         if (campitch != 90 && campitch != -90)         {             movecamera(movevel, 180.0);         }          movecameraup(movevel, 180.0);     }      if (kstate[sdlk_a])     {       //move left         movecamera(movevel, 90.0);     }      if (kstate[sdlk_d])     {  //move right         movecamera(movevel, 270);     } }  glrotatef(-campitch, 1.0, 0.0, 0.0); glrotatef(-camyaw, 0.0, 1.0, 0.0); }

main (loop)

while (running) {     glclear(gl_color_buffer_bit | gl_depth_buffer_bit);     glloadidentity();      sdl_event ev;     while (sdl_pollevent(&ev))     {         switch (ev.type)         {             case sdl_quit:                 running = false;                 break;             case sdl_keydown:                 int x, y;                  sdl_getmousestate(&x, &y);                 main::handlekeys(ev.key.keysym.scancode, x, y);                 break;         }     }      main::update(window);     main::render(window);      sdl_gl_swapwindow(window); }

main (update):

void main::update(sdl_window* window) { control(0.2, 0.2, mousein, window); updatecamera(0.2); //move camera new location }

use sdl_pumpevents() update state array. (from sdl_getkeyboardstate() wiki). believe if do:

sdl_pumpevents(); sdl_getkeyboardstate(null);

you should results looking for. (you need sdl_pumpevents every loop sdl_getkeyboardstate obviously)

(edit) option:

    case sdl_keydown:         switch(event.key.keysym.sym){             case sdlk_w                 (... code)                 break;             case sdlk_s:                 (... code)                 break;             case sdlk_a:                 (... code)                 break;             case sdlk_d:                 (... code)                 break;

you can send event.key.keysym.sym function , use ofcourse.


Comments

Post a Comment

Popular posts from this blog

c# - Unity IoC Lifetime per HttpRequest for UserStore -

-
i'm trying clean default implementation of accountcontroller.cs comes out of box in new mvc5/owin security implementation. have modified constructor this: private usermanager<applicationuser> usermanager; public accountcontroller(usermanager<applicationuser> usermanager) { this.usermanager = usermanager; } also, have created lifetime manager unity looks this: public class httpcontextlifetimemanager<t> : lifetimemanager, idisposable { private httpcontextbase _context = null; public httpcontextlifetimemanager() { _context = new httpcontextwrapper(httpcontext.current); } public httpcontextlifetimemanager(httpcontextbase context) { if (context == null) throw new argumentnullexception("context"); _context = context; } public void dispose() { this.removevalue(); } public override object get...
Read more

Change the color of an oval at click in Java AWT -

-
i have draw ovals in java, , @ click change color. beginning tried change color after 20 ms, doesn't work. my code is: public class mycomponentnew extends frame { public graphics2d g2d; public mycomponentnew(string title) { super(title); setsize(400, 550); } @override public void paint(graphics g) { this.g2d = (graphics2d) g; this.g2d.setcolor(color.red); this.g2d.filloval(10, 55, 50, 100); } public void changecolor () { this.g2d.setcolor(color.blue); this.g2d.filloval(10, 55, 50, 100); } } and in class main method have: mycomponentnew m; m = new mycomponentnew("fereastra cu baloane"); m.setvisible(true); m.addwindowlistener(new windowadapter() { @override public void windowclosing(windowevent we) { system.exit(0); } }); try { thread.sleep(20); } catch(interruptedexception e) {} m.changecolor(); the color of oval remains red. ...
Read more

I am trying to solve the error message 'incompatible ranks 0 and 1 in assignment' in a fortran 95 program. -

-
i writing program in fortran find velocity of parachuting person in relation time. keep getting error can't fix. new programming , appreciated. the error is v(i+1)=v(i)+[32-((c*v(i)*v(i))/m)]*(h) 1 error: incompatible ranks 0 , 1 in assignment @ (1) and program is program para integer :: real :: v(11) !velocity real :: q !initial velocity real :: h !time step real :: c !drag coefficient real :: m !mass ! gravity equal 32 ft/s^2 write (*,*)'enter time step' read(*,*)h write(*,*)'enter initial velocity' read(*,*)q write(*,*)'enter drag coefficient' read(*,*)c write(*,*)'enter mass' read(*,*)m i=1,10 ! 1 10, 1 being interval. end v(i+1)=v(i)+[32-((c*v(i)*v(i))/m)]*(h) q=v(1) end program you cannot use [] normal parenthesis in expressions. array constructor, [ items ] means array items elements. end do should after line.
Read more