Creating The Game - 24/02/2013

This week there has been a large amount of work that has been done on the Game but there is still a lot of work to be done on the game. There has also been no meeting between the members of the group as with it being half term some members were unable to attend due to being out of the country, but I have spoken to Stephen during the week and he has given me the completed animation frames for the character allowing me to see for the first time what the character and animation will look like now that it is in the 32x64 dimensions.

This week I myself have concentrated on getting a pseudo gravity system into the game which I severely underestimated on the complexity of the coding that would have to go into this. To start off I figured out how to get a smooth jump from the character instead of just being able to walk up and down whenever the user pleased meaning that they can press the jump key once and the character will the perform the jump, the complex part of this was handling collisions while in the air allowing for the character to come back down if they were to collide with a block above them while jumping, but this was all figured out over the week and has been successfully implemented into the game along with the feature of the character changing its sprite depending on the direction it is facing, this means that if the user presses the left key the character will now face left but there is still no animation within the game, all of these features have been implemented into the game using the code below.

Jumping Gravity + Sprite Change

if ((input.isKeyPressed(Input.KEY_UP) || input.isKeyPressed(Input.KEY_W)) && !jumping){

   if(lastKeyLeft){
    player = jumpLeft;
   } else {
    player = jumpRight;
   }

   gravSpeeds = -12;
   jumping = true;
   }

   if(jumping && gravSpeeds < 12) { 
    gravSpeeds += 0.5; 
   } 

   if (jumping == false){
    gravSpeeds = 12;
    if (lastKeyLeft == true){
     player = moveLeft;
    } else {
     player = moveRight;
    }
   }

   y += gravSpeeds;
   origY = y - gravSpeeds;

   playerPoly.setY(y);
   if (entityCollisionWith()){

    if (jumping && gravSpeeds < ((gravSpeeds * (-1)))){
     gravSpeeds = 0;
     gravSpeeds += 0.5;
     y += gravSpeeds;
    }

    if ( gravSpeeds > 0) {
     gravSpeeds = 0;
     jumping = false;
     y = origY;
     playerPoly.setY(y);
    }  
   } 


   if (input.isKeyDown(Input.KEY_DOWN) || input.isKeyDown(Input.KEY_S))
   {
    y += floatDelta;
    playerPoly.setY(y);
    if (entityCollisionWith()){
     y -= floatDelta;
     playerPoly.setY(y);
    }
   }

   if (input.isKeyDown(Input.KEY_LEFT) || input.isKeyDown(Input.KEY_A))
   {
    lastKeyLeft = true;

    if (jumping){
     player = jumpLeft;
     jumpLeft.update(delta);
    } else {
     player = moveLeft;
     moveLeft.update(delta);
    }
    x -= floatDelta;
    playerPoly.setX(x);
    if (entityCollisionWith()){
     x += floatDelta;
     playerPoly.setX(x);
    }
   } else {
    moveLeft.setCurrentFrame(0);
   }

   if (input.isKeyDown(Input.KEY_RIGHT) || input.isKeyDown(Input.KEY_D))
   {
    lastKeyLeft = false;

    if (jumping){
     player = jumpRight;
     jumpRight.update(delta);
    } else {
     player = moveRight;
     moveRight.update(delta);
    }
    x += floatDelta;
    playerPoly.setX(x);
    if (entityCollisionWith()){
     x -= floatDelta;
     playerPoly.setX(x);
    }
   }
   else {
    moveRight.setCurrentFrame(0);
   }

Animation Code

  player = new Animation();
  player.setAutoUpdate(true);
  Image [] walkRight = {new Image ("data/Sprites/CharStand.png"), 
                        new Image ("data/Sprites/CharStep1.png"), 
                        new Image ("data/Sprites/CharStep2.png")};
  Image [] walkLeft = {new Image ("data/Sprites/CharStandBACKWARDS.png"), 
                       new Image ("data/Sprites/CharStep1BACKWARDS.png"), 
                       new Image ("data/Sprites/CharStep2BACKWARDS.png")};
  Image [] jumpingLeft = {new Image ("data/Sprites/CharJumpBACKWARDS.png")};
  Image [] jumpingRight = {new Image ("data/Sprites/CharJump.png")};

  moveRight = new Animation(walkRight, 200, false);
  moveLeft = new Animation(walkLeft , 200, false);
  jumpRight = new Animation(jumpingRight, 200, false);
  jumpLeft = new Animation(jumpingLeft, 200, false);

  jumpRight.setPingPong(true);
  jumpLeft.setPingPong(true);
  moveRight.setPingPong(true);
  moveLeft.setPingPong(true);

  player = moveRight;