Lunar-Lander/game.cpp at master · emiid/Lunar-Lander · GitHub

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/*************************************************************
 * Description: Contains the implementations of the
 *  method bodies for the game class.
 *************************************************************/

#include "game.h"

#include "uiDraw.h"
#include "uiInteract.h"
#include "point.h"
#include "ground.h"
#include "lander.h"

/******************************************
 * GAME :: JUST LANDED
 * Did we land successfully?
 ******************************************/
bool Game :: justLanded() const
{
   bool landed = false;

   Point platformCenter = ground.getPlatformPosition();
   int width = ground.getPlatformWidth();

   float xDiff = lander.getPoint().getX() - platformCenter.getX();
   float yDiff = lander.getPoint().getY() - platformCenter.getY();

   float margin = width / 2.0;

   if (fabs(xDiff) < margin)
   {
      // between edges

      if (yDiff < 4 && yDiff >= 0)
      {
         // right above it

         if (fabs(lander.getVelocity().getDx()) < 3 && fabs(lander.getVelocity().getDy()) < 3)
         {
            // we're there!
            landed = true;
         }
      }
   }

   return landed;
}

/***************************************
 * GAME :: ADVANCE
 * advance the game one unit of time
 ***************************************/
void Game :: advance()
{
   if (lander.isAlive() && !lander.isLanded())
   {
      // advance the lander
      lander.applyGravity(GRAVITY_AMOUNT);
      lander.advance();

      // check for crash
      if (!ground.isAboveGround(lander.getPoint()))
      {
         lander.setAlive(false);
      }

      // check for just landed
      if (justLanded())
      {
         lander.setLanded(true);
      }
   }
}

/***************************************
 * GAME :: HANDLE INPUT
 * accept input from the user
 ***************************************/
void Game :: handleInput(const Interface & ui)
{
   if (lander.isAlive() && !lander.isLanded())
   {

      if (ui.isDown())
      {
         lander.applyThrustBottom();
      }

      if (ui.isLeft())
      {
         lander.applyThrustLeft();
      }

      if (ui.isRight())
      {
         lander.applyThrustRight();
      }
   }
}

/*********************************************
 * GAME :: DRAW
 * Draw everything on the screen
 *********************************************/
void Game :: draw(const Interface & ui)
{
   lander.draw();

   if (lander.isLanded())
   {
      //drawText(Point(), "You have successfully landed!");
      drawText(Point(), "Successful land!! Points earned: ");
      drawNumber(Point(), lander.getFuel());
   }

   if (!lander.isAlive())
   {
      drawText(Point(), "You have crashed!");
   }

   if (lander.canThrust())
   {
      drawLanderFlames(lander.getPoint(), ui.isDown(), ui.isLeft(), ui.isRight());
   }

   Point fuelLocation;
   fuelLocation.setX(topLeft.getX() + 5);
   fuelLocation.setY(topLeft.getY() - 5);

   drawNumber(fuelLocation, lander.getFuel());

   // draw ground
   ground.draw();
}