platformer's main.cpp as of 2024-03-21

#include <globals.hpp>
#include <player.hpp>

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

using namespace kit;


f64 frand(){
  u32 value = (rand()<<15) | rand();
  return (f64)value/(KIT_U32_MAX>>2);
}


//generate random sound effect speed, from a given range
f64 rss(f64 range = 0.1){
  return 1.0 + (frand()*2.0-1.0)*range;
}



AudioData* sfx_footstep     = nullptr;
AudioData* sfx_jump_landing = nullptr;
AudioData* sfx_jump         = nullptr;


Player player;


bool fullscreen = false;


bool handleEvents(){
  bool run = true;


  WindowEvent e;
  while(pollWindowEvent(&e))
  switch(e.type){
    case WINEVENT_WIN_CLOSE: _we_w_close: run = false; break;

    case WINEVENT_KEY_DOWN: {
      if(e.key.repeat) break;
      switch(e.key.vkey){
        case VKEY_ESCAPE    : goto _we_w_close;
        case VKEY_F11       : gl_win->setFullscreen(fullscreen^=1); break;
        case VKEY_BSLASH    : player.confused^=1; break;
        case VKEY_FSLASH    : player.enforceMaxVel^=1; break;
        case VKEY_ENTER     : {
          player.pos = shape::fpoint(CANVSIZ_X/2,CANVSIZ_Y/2-80);
          player.vel = shape::fpoint(0,0);
        }break;
        case VKEY_LEFT : player.acc.x += -PLAYER_SPEED; break;
        case VKEY_RIGHT: player.acc.x +=  PLAYER_SPEED; break;
        case VKEY_UP   : {
          if(player.ticksInAir < 2  &&  !player.jumped){
            player.jumped = true;
            player.vel.y = -PLAYER_JUMP_STRENGTH;
            gl_snd->sfxPlay(sfx_jump, 0.05f, 0.05f);
          }
        } break;
      }
    } break;

    case WINEVENT_KEY_UP: {
      switch(e.key.vkey){
        case VKEY_LEFT : player.acc.x -= -PLAYER_SPEED; break;
        case VKEY_RIGHT: player.acc.x -=  PLAYER_SPEED; break;
        case VKEY_UP   : {
          if(player.jumped && player.vel.y<0)
            player.vel.y *= PLAYER_JUMP_CANCEL;
        } break;
      }
    } break;

  }


  return run;
}




#define DBG_TXT(_l, _fmt, ...) gl_textf(1,1+(_l)*9, _fmt, 0, __VA_ARGS__)

int gameMain(int argc, char** argv){
  sfx_footstep = new AudioData("dat/sfx/footstep.qoa", gl_snd);
  sfx_jump_landing = new AudioData("dat/sfx/jump_landing.qoa", gl_snd);
  sfx_jump = new AudioData("dat/sfx/jump.qoa", gl_snd);


  player.pos.x = CANVSIZ_X/2;
  player.pos.y = CANVSIZ_Y/2 - 80;

  bool run = true;
  while(run){
    f64 timeStart = time::getUptime();
    gl_frameTimer->setTimer(0.25/60);


    if(!handleEvents()) break;


    player.vel.y += GRAVITY;
    player.update();


    if(     player.pos.x <          -PLAYER_HALF) player.pos.x = CANVSIZ_X+PLAYER_HALF;
    else if(player.pos.x > CANVSIZ_X+PLAYER_HALF) player.pos.x = -PLAYER_HALF;

    if(player.pos.y < -PLAYER_HALF){
      player.pos.y = CANVSIZ_Y/2;
      player.vel.y = fabsf(player.vel.y);

    } else if(player.pos.y > CANVSIZ_Y/2){
      if(player.ticksInAir > 1)
        gl_snd->sfxPlay(sfx_jump_landing, 0.08f, 0.08f, rss());
      player.pos.y  = CANVSIZ_Y/2;
      player.vel.y  = 0.0f;
      player.ticksInAir = 0;
      player.jumped = false;

    } else if(player.pos.y < CANVSIZ_Y/2){
      ++player.ticksInAir;

    }


    //play footstep sound when feet touch ground
    if(player.queryFootstep())
      gl_snd->sfxPlay(sfx_footstep, 0.025f, 0.025f, rss());


    gl_win->clear(0x7f7f7f);
    DBG_TXT(0, ".pos           = {%6.2f, %6.2f}", player.pos.x, player.pos.y);
    DBG_TXT(1, ".vel           = {%6.2f, %6.2f}", player.vel.x, player.vel.y);
    DBG_TXT(2, ".acc           = {%6.2f, %6.2f}", player.acc.x, player.acc.y);
    DBG_TXT(3, ".ticksInAir    = %u", player.ticksInAir);
    DBG_TXT(4, ".runningState  = %6.4f", player.runningState);
    DBG_TXT(5, ".facingRight   = %s", (player.facingRight)?"true":"false");
    DBG_TXT(6, ".enforceMaxVel = %s", (player.enforceMaxVel)?"true":"false");
    DBG_TXT(7, ".confused      = %s", (player.confused)?"true":"false");
    DBG_TXT(8, ".jumped        = %s", (player.jumped)?"true":"false");
    player.blit(PLAYER_SCALE, PLAYER_SCALE);
    shape::rect bottomHalf(0, CANVSIZ_Y/2+PLAYER_HALF, CANVSIZ_X, CANVSIZ_Y/2);
    gl_win->drawRectangles(&bottomHalf, 1, 0x3f3f3f);
    DBG_TXT(31, "controls: arrow keys, f11, enter, '\\', '/' (esc to quit)");
    gl_win->present();


    gl_frameTimer->wait();
    printf("%f\n",time::getUptime()-timeStart);
  }



  delete sfx_footstep;
  delete sfx_jump_landing;
  delete sfx_jump;

  return 0;
}