game-loop.cx

package main

var GETREADY_LIMIT f64 = 2.0D
var GETREADY_TIMER f64

var GAMEMODE_GETREADY i32
var GAMEMODE_PLAYING  i32 = 1
var GAMEMODE_WONBOARD i32 = 2
var GAMEMODE_DYING    i32 = 3
var GAMEMODE_GAMEOVER i32 = 4
var GAMEMODE_MENU     i32 = 5

var gameMode i32

func main() {
  initGLFW()
  var program i32 = 
  initOpenGL()

  newlevel_label:

  // Initializes all game objects
  initScene()

  // Game loop
  for bool.not(glfw.ShouldClose("window")) &&
      gameMode != GAMEMODE_GAMEOVER {
    
    if gameMode == GAMEMODE_GETREADY {
      if isTimerOver(GETREADY_TIMER, GETREADY_LIMIT) {
        gameMode = GAMEMODE_PLAYING
      }
    } else
    if gameMode == GAMEMODE_PLAYING {
      updateGamePlay()
    }

    renderGame(program)

		glfw.PollEvents()
    glfw.SwapBuffers("window")
  }
}

func updateGamePlay() {
  for i:=0; i<4; i++ {
    updateGhostMode(ghosts[i])
  }

  movePlayerByHeldKeys()
  manageAnyDotEating()
  maybeMoveGhosts()
  maybeReleaseGhost()

  if isLevelCompleted() {
    levelUp()
    goto newlevel_label
  }
}

func manageAnyDotEating() {
  for i:=0; i<points_count; i++ {
    if       points[i].active &&
      i32.eq(points[i].index_x, player.index_x) &&
      i32.eq(points[i].index_y, player.index_y) {
      
      points[i].active = false
      if i32.eq(points[i].ptype, PATH_CELL_WITH_SUPER_POINT) {
        for j:=0; j<4; j++ {
          if bool.not(i32.eq(ghosts[j].status, GHOST_MODE_IN_HOUSE)) {
            ghosts[j].status = GHOST_MODE_FRIGHTENED
            ghosts[j].direction = reverseDirection(ghosts[j].direction)
            GHOST_FRIGHTENED_TIMER = glfw.GetTime()
          }
        }
      }
    }
  }
}

func maybeMoveGhosts() {
  if isTimerOver(GHOST_MOVEMENT_TIMER, GHOST_MOVEMENT_LIMIT) {
    // move all ghosts
    for i:=0; i<4; i++ {
      moveGhost(ghosts[i])
      checkPlayerGhostCollision(ghosts[i])
    }
    
    GHOST_MOVEMENT_TIMER = glfw.GetTime()
  }
}

func maybeReleaseGhost() {
  if isTimerOver(GHOST_RELEASE_TIMER, GHOST_CHASE_LIMIT) {
    // Does not release ghosts during frightened mode
    if isTimerOver(GHOST_FRIGHTENED_TIMER, GHOST_FRIGHTENED_LIMIT) {
      releaseGhost()
    }
    
    GHOST_RELEASE_TIMER = glfw.GetTime()
  }
}