Pixi Tile Wizard Demo (2)

The introduction

The previous chapter mainly describes the creation and use of pixi tiling wizard and parallax scrolling, this chapter mainly describes the optimization and new functions based on the previous demo.

1. New functions

1.1 fractional && speed

The score here is a little lazy, here is a direct cumulative operation in ticker, thinking about how many points can be achieved by the score, the overall speed of the game will increase a stage, of course, can also avoid obstacles to get points, if there are gold coins and other things can be further optimized.

app.ticker.add(() = > {
  // add up the score
  $('.score-ctn').text(` score:${score += 1}`);
  
  // Increase the speed
  score > 10000 && score < 20000 && (speed = 11);
  score > 20000 && score < 30000 && (speed = 12);
  score > 30000 && score < 40000 && (speed = 13);
  score > 40000 && (speed = 14);

  // Scroll indefinitely
  bgSpr.tilePosition.x -= 1;
  bgSpr.tilePosition.x %= PIXI.Loader.shared.resources['bg2_2'].texture.width;
  
  / / collision
  bump(role, monster) && (roleSmoothie.update = inverted.bind(this.3));
});

Copy the code

1.2 Upper Barrier

The top obstacle is the same as the monster, but in a different position, change the collision feedback when doing collision detection. Setup () new code:

let column = new PIXI.Sprite(PIXI.Loader.shared.resources['column'].texture);

let columnSmoothie = null; // The overhead barrier moves

column.position.set(7700.0);

app.stage.addChild(column);

// Foreground move
columnSmoothie = new Smoothie({
  engine: PIXI,
  renderer: app.renderer,
  root: app.stage,
  update: translate.bind(this, column, speed)
});
columnSmoothie.start();
Copy the code

1.3 Collision Detection

Collision detection and collision here to land obstacles feedback is different, when collision to land is directly deduct a little life value, the collision to the above obstacles will not directly deduct life values, but with the mobile launch screen his characters above obstacles will deduct life value, unlike collision to land barrier here above cannot be directly through the obstruction to the latter can pass through, However, health will be deducted directly.

The collision detection idea here is also relatively simple, Land obstacle will return true as long as the character’s x and y axis position intersects with the x and Y axis of the obstacle. It should be noted that the center point of the Sprite is now directly below, and the width / 2 of the Sprite should be added to the collision detection point, and the height of the obstacle should be subtracted from the Y value when the jump collision detection is performed. Returns true if the X-axis minus the obstacle X-axis is greater than or equal to half the negative width of the obstacle and less than half the width of the obstacle and y minus the obstacle y minus the obstacle height is greater than or equal to 20.

Since Sprite tiles are rectangular, it is possible to hit an extra right Angle of the tile during the jump, so a rough subtracting of 20 is considered to be at least zero. Circular collision detection can also be done to avoid right-angle misjudgment.

// Land barrier
function bottombump (spr1, spr2) {
  let spr1X = spr1.x + spr1.width / 2;
  let spr2Y = spr2.y - spr2.height;

  return spr1X - spr2.x <= spr2.width / 2 && spr1X - spr2.x >= -spr2.width / 2 && spr1.y - 					 spr2Y >= 20? true: false;
}

// Overhead barrier
function topbump (spr1, spr2) {
  return spr1.x - spr2.x < 30 && spr1.x - spr2.x > -30 && (spr1.y - spr1.height) - (spr2.y + 					spr2.height) <= 0? true: false;
}
Copy the code

Effect preview:

1.4 2

The second jump is triggered by pressing the jump button again before the first jump is completed and the drop frame is completed. The rest of the jump cannot be triggered. The jump animation configuration is defined at the top

One idea is to pre-define an animation frame with subscripts starting at 0 and ending at 4 frames. When the subscript is judged to be less than 4 and the height of the jump does not exceed a certain value, the subscript is accumulated. When the character’s Y-axis decreases, the y value increases and falls when the subscript is greater than 4. In the last frame, the subscript is restored to 0 to switch the running state.

The second jump requires two variables for judgment, one is used to record the number of clicks and jumps, and the other is used to judge whether the second jump is made. The person who jumps twice in a row is just before the fall of the first jump, and the height of the second jump is set lower than that of the first jump. After the second jump is completed, the person is at the highest point. Then add a jump animation on frame 5 to continue the fall of a jump.

let roleSprJumpIndex = 0;// a runout subscript

/ / jump
$('.jump').on('touchstart'.(e) = > {
  if (jumpNum < 2) { // Prohibit multiple jumps
    if(! isJump) { roleSmoothie.update = jump.bind(this); / / a jump
      isJump = true;
    } else {
      roleSmoothie.update = jump2.bind(this); / / 2
      isJump = false;
    }
  }
  jumpNum++;
})
/ / a jump
function jump () {
  role.texture = PIXI.Loader.shared.resources[config.jump[roleSprJumpIndex]].texture;
  / / jump
  if (roleSprJumpIndex <= 4 && role.position.y > 285) {
    roleSprJumpIndex++;
    role.position.y -= 40;
    isAction = false;
  }
  / / the whereabouts
  if (roleSprJumpIndex > 4 ) {
    if (role.position.y < 465) {
      role.position.y += 35;
    }
    roleSprJumpIndex++;
    isAction = true;
  }
  / / to the ground
  if (roleSprJumpIndex > 8) {
    roleSprJumpIndex = 0;
    role.position.y = 465;
    isAction = true;
    jumpNum = 0; // Reset the number of jumps
    isJump = false;
    roleSmoothie.update = go.bind(this); // Running state}}/ / 2
function jump2(){
  role.texture = PIXI.Loader.shared.resources[config.jump2[roleSprJumpIndex2]].texture;
  if (roleSprJumpIndex2 < 6) {
    roleSprJumpIndex2++;
    role.position.y -= 15;
  } else {
    roleSprJumpIndex = 5;
    roleSprJumpIndex2 = 0;
    roleSmoothie.update = jump.bind(this); }}Copy the code

Effect:

1.5 HP

Health in each collision is deducted a bit, ticker collision feedback added code:

Here, a bit of health will be deducted after being pushed out of the screen by the obstacle above, and the character will directly return to the original position. If the character slides to avoid the obstacle above before pushing out of the screen, the x axis of the character will gradually increase to the original position.

// Land obstacle feedback
if (isBottomBump || isBottomBump2) {
  role.tint = 0xFFFF660;
  if (isBlood && bloodNum >= 0) {
    bloodArr[bloodNum].style.display = 'none';
    bloodNum--;
    isBlood = false; }}else {
  role.tint = 0xFFFFFF;
  isBlood = true;
}

// Top obstacle feedback
if (topBupm) {
  role.x = column.x - 30;
  if (role.x < -100) {
    bloodArr[bloodNum].style.display = 'none';
    role.x = 400; bloodNum--; }}// increment to the original position
if (role.x < 400) {
  role.x = role.x + 1;
}
Copy the code

Effect:

1.6 score

I found two sound effects online, one background music, one button sound, plus sound effects to make the experience not so dull.

Howler.js is very simple to use:

// Background music
let bgBgm = new Howl({
  src: './demo_bg.mp3'.loop: true // Whether to loop
});
bgBgm.play(); / / play

// Button sound
let btnBgm = new Howl({
  src: './demo2.mp3'.loop: false
});
Copy the code

The button event triggers play.

2. Setup code

function setup () {
  / / the background
  let bgSpr = new PIXI.extras.TilingSprite(PIXI.Loader.shared.resources['bg'].texture, app.renderer.width, app.renderer.height);
  / / outlook
  let bridge = new PIXI.extras.TilingSprite(PIXI.Loader.shared.resources['bridge'].texture, 1600.437);
  / / character
  let role = new PIXI.Sprite(PIXI.Loader.shared.resources['role'].texture);
  / / the monster
  let monster = new PIXI.Sprite(PIXI.Loader.shared.resources['monster'].texture);
  let monster2 = new PIXI.Sprite(PIXI.Loader.shared.resources['monster2'].texture);
  // Overhead obstruction
  let column = new PIXI.Sprite(PIXI.Loader.shared.resources['column'].texture);

  let roleSmoothie = null; // Character animation
  let monsterSmoothie = null; // Monster animation
  let monster2Smoothie = null;
  let bridgeSmoothie = null; // Foreground animation
  let columnSmoothie = null; // Animation of obstacles above

  let roleSprGoIndex = 0; // walk action picture subscript
  let roleSprRunIndex = 0; // Run action picture subscript
  let roleSprJumpIndex = 0; // runout is used to subscript the image
  let roleSprJumpIndex2 = 0;
  let roleSprInverIndex = 0; // reverse action picture subscript

  let speed = 10; // Roll speed
  
  let jumpNum = 0; // Number of jumps
  let isJump = false; // Jump state
  
  let isBlood = true; 
  let bloodNum = 2; // Health subscript
  let bloodArr = $('.blood-ctn').children(); // Health array
  
  let score = 0; / / score

  let isAction = true; // Action state
  
  // Background music
  let bgBgm = new Howl({
    src: './demo_bg.mp3'.loop: true // Whether to loop
  });
  bgBgm.play(); / / play

  // Button sound
  let btnBgm = new Howl({
    src: './demo2.mp3'.loop: false
  });
  
  / / center
  role.anchor.set(0.5.1);
  monster.anchor.set(0.5.1);
  monster2.anchor.set(0.5.1);

  // Scale
  role.scale.set(1.5.1.5);
  monster2.scale.set(0.9.0.9);

  / / position
  role.position.set(400.465);
  monster.position.set(2000.465);
  monster2.position.set(3200.465);
  bridge.position.set(0.440);
  column.position.set(7700.0);

  // Add to the stage
  app.stage.addChild(bgSpr, bridge, role, monster, monster2, column);
  
  / / translation
  function translate (spr, num) {
    spr.tilePosition.x -= num;
    spr.tilePosition.x %= PIXI.Loader.shared.resources['prospect'].texture.width;
  };

  // The monster moves
  function monsterTranslate (spr, num, x) {
    spr.position.x -= num;
    spr.position.x < -x && (spr.position.x = 1600);
  };
 
  / / run
  function go () {
    role.texture = PIXI.Loader.shared.resources[config.go[roleSprGoIndex]].texture;
    roleSprGoIndex < 6? roleSprGoIndex++ : roleSprGoIndex = 0;
  };

  / / jump
  function jump () {
    role.texture = PIXI.Loader.shared.resources[config.jump[roleSprJumpIndex]].texture;
    if (roleSprJumpIndex <= 4 && role.position.y > 285) {
      roleSprJumpIndex++;
      role.position.y -= 40;
      isAction = false;
    }
    if (roleSprJumpIndex > 4 ) {
      if (role.position.y < 465) {
        role.position.y += 35;
      }
      roleSprJumpIndex++;
      isAction = true;
    }
    if (roleSprJumpIndex > 8) {
      roleSprJumpIndex = 0;
      role.position.y = 465;
      isAction = true;
      jumpNum = 0;
      isJump = false;
      roleSmoothie.update = go.bind(this); }}/ / 2
  function jump2(){
    role.texture = PIXI.Loader.shared.resources[config.jump2[roleSprJumpIndex2]].texture;
    if (roleSprJumpIndex2 < 6) {
      roleSprJumpIndex2++;
      role.position.y -= 15;
    } else {
      roleSprJumpIndex = 5;
      roleSprJumpIndex2 = 0;
      roleSmoothie.update = jump.bind(this); }}/ / slide
  function slip (num) {
    role.texture = PIXI.Loader.shared.resources['sprite4_0'].texture;
  }
  // The character moves
  roleSmoothie = new Smoothie({
    engine: PIXI,
    renderer: app.renderer,
    root: app.stage,
    fps: 8.update: go.bind(this)}); roleSmoothie.start();// The monster moves
  monsterSmoothie = new Smoothie({
    engine: PIXI,
    renderer: app.renderer,
    root: app.stage,
    update: monsterTranslate.bind(this, monster, 7.100)}); monsterSmoothie.start();// Foreground move
  prospectSmoothie = new Smoothie({
    engine: PIXI,
    renderer: app.renderer,
    root: app.stage,
    update: translate.bind(this, prospectSpr, 3)}); prospectSmoothie.start();// The column moves
  columnSmoothie = new Smoothie({
    engine: PIXI,
    renderer: app.renderer,
    root: app.stage,
    update: monsterTranslate.bind(this, column, speed)
  });
  columnSmoothie.start();

  // Jump events
  $('.jump').on('touchstart'.(e) = > {
    if (jumpNum < 2) {
      if(! isJump) { roleSmoothie.update = jump.bind(this);
        isJump = true;
      } else {
        roleSmoothie.update = jump2.bind(this);
        isJump = false;
      }
    }
    jumpNum++;
    btnBgm.play();
  });
  
  // Drop events
  $('.slip').on('touchstart'.(e) = > {
    roleSmoothie.update = slip.bind(this);
    roleSprJumpIndex = 0;
    roleSprJumpIndex2 = 0;
    jumpNum = 0;
    isJump = false;
    
    btnBgm.play();
  });
  
  // End of slide
  $('.slip').on('touchend'.(e) = > {
    roleSmoothie.update = go.bind(this);
  });
  
  app.ticker.add(() = >{$('.score-ctn').text(` score:${score += 1}`);

    // Increase the speed
    score > 10000 && score < 20000 && (speed = 11);
    score > 20000 && score < 30000 && (speed = 12);
    score > 30000 && score < 40000 && (speed = 13);
    score > 40000 && (speed = 14);

    // Scroll indefinitely
    bgSpr.tilePosition.x -= 1;
    bgSpr.tilePosition.x %= PIXI.Loader.shared.resources['bg2_2'].texture.width;

    isBottomBump = bottombump(role, monster);
    isBottomBump2 = bottombump(role, monster2);
    topBupm = topbump(role, column);

    // Monster collision
    if (isBottomBump || isBottomBump2) {
      role.tint = 0xFFFF660;
      if (isBlood && bloodNum >= 0) {
        bloodArr[bloodNum].style.display = 'none';
        bloodNum--;
        isBlood = false; }}else {
      role.tint = 0xFFFFFF;
      isBlood = true;
    }

    // Column collision
    if (topBupm) {
      role.x = column.x - 30;
      if (role.x < -100) {
        bloodArr[bloodNum].style.display = 'none';
        role.x = 400; bloodNum--; }}if (role.x < 400) {
      role.x = role.x + 1; }})});// Monster collision
  function bottombump (spr1, spr2) {
    let spr1X = spr1.x + spr1.width / 2;
    let spr2Y = spr2.y - spr2.height;

    return spr1X - spr2.x <= spr2.width / 2 && spr1X - spr2.x >= -spr2.width / 2 && spr1.y - spr2Y >= 20? true: false;
  }
  
  // Column collision
  function topbump (spr1, spr2) {
    return spr1.x - spr2.x < 30 && spr1.x - spr2.x > -30 && (spr1.y - spr1.height) - (spr2.y + spr2.height) <= 0? true: false;
  }
Copy the code

Project link: Demo

3, summarize

This demo for now, though it’s not a difficult point, but it is only belong to can run up and coarser, many details still need to optimize, continue to do, of course, there must be a challenge, such as the zulus are fixed, need to change to be random, and pillars and couldn’t be a monster on the Y axis, There are also some new advanced features like gold coins, flying, broken Bridges and so on.

4. Learn more

Pixi Tile wizard Demo (2)

Wechat search public number: DigitMagic magic laboratory

mo4tech.com (Moment For Technology) is a global community with thousands techies from across the global hang out!Passionate technologists, be it gadget freaks, tech enthusiasts, coders, technopreneurs, or CIOs, you would find them all here.

The introduction

directory

1. New functions

1.1 fractional && speed

1.2 Upper Barrier

1.3 Collision Detection

1.4 2

1.5 HP

1.6 score

2. Setup code

3, summarize

4. Learn more

Pixi Tile Wizard Demo (2)

The introduction

directory

1. New functions

1.1 fractional && speed

1.2 Upper Barrier

1.3 Collision Detection

1.4 2

1.5 HP

1.6 score

2. Setup code

3, summarize

4. Learn more

Related Posts

Js – array

CSS is really not good JS what matter

Quickly complete an IM front-end project with Flutter