initial commit

js/camera.js

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+//-------------------------------------------------------------------------
+// 3.2 Simple CAMERA
+//-------------------------------------------------------------------------
+
+function renderCamera() {
+  // ! Ich muss diese Funktion gegen eine mit CameraBox austauschen. Diese kann ich aber für TopDown/Overworld Level benutzen.
+
+  const cameraWidth = mapWidth * TILE
+  const cameraHeight = mapHeight * TILE
+
+  const camera = {
+    get x() {
+      if (player.x < scaledCanvas.width) return 0
+      if (player.x > cameraWidth - scaledCanvas.width)
+        return -(cameraWidth - scaledCanvas.width * 2)
+      else return -(player.x - scaledCanvas.width)
+    },
+    get y() {
+      if (player.y < scaledCanvas.height) return 0
+      if (player.y > cameraHeight - scaledCanvas.height)
+        return -(cameraHeight - scaledCanvas.height * 2)
+      else return -(player.y - scaledCanvas.height)
+    },
+  }
+
+  ctx.translate(camera.x, camera.y)
+}
+
+//-------------------------------------------------------------------------
+// Box CAMERA
+//-------------------------------------------------------------------------
+
+let cameraWithBox = {
+  position: {
+    x: 0,
+    y: 0,
+  },
+}
+
+function renderCameraWithBox() {
+  //console.log('log renderCameraWithBox position.x: ', cameraWithBox.position.x)
+  ctx.translate(cameraWithBox.position.x, cameraWithBox.position.y)
+}
+
+const cameraBox = {
+  // ! Die Werte stimme nur ungefähr, geben mir aber eine grobe CameraBox zurück.
+  get x() {
+    return -(canvas.width / 2 / 2 - 100 - player.x)
+  },
+  get y() {
+    return -(canvas.height / 2 / 2 - 150 - player.y)
+  },
+  width: canvas.width / 2 - 200,
+  height: canvas.height / 2 - 300,
+}
+
+// ! "camera" muss ich dann in der renderCamera() in der render Funktion anpassen.
+// ? Woher kommt this.velocity ?
+
+function shouldPanCameraToTheLeft({ canvas, camera }) {
+  const cameraboxRightSide = cameraBox.x + cameraBox.width
+  const scaledDownCanvasWidth = canvas.width / 2
+
+  // console.log('log cameraboxRightSide: ', cameraboxRightSide)
+  //console.log('log cameraboxRightSide >= 2048: ', cameraboxRightSide >= 2048)
+  // ! Woher kommt der Wert hier?
+  if (cameraboxRightSide >= 2048) return
+
+  //console.log('log player.x: ', player.x)
+
+  //console.log('log scaledDownCanvasWidth: ', scaledDownCanvasWidth)
+
+  /* console.log(
+    'log shouldPanCameraToTheLeft: ',
+    cameraboxRightSide >= scaledDownCanvasWidth
+  ) */
+
+  if (
+    cameraboxRightSide >=
+    scaledDownCanvasWidth + Math.abs(cameraWithBox.position.x)
+  ) {
+    cameraWithBox.position.x -= player.x - canvas.width / 2 / 2
+  }
+}
+
+function shouldPanCameraToTheRight({ canvas, cameraprop }) {
+  //console.log('log shouldPanCameraToTheRight')
+  //console.log('log entity x update: ', (player.x + step * player.dx).toFixed(2))
+  //console.log('log cameraBox.x <= 0: ', cameraBox.x <= 0)
+  if (cameraBox.x <= 0) return
+
+  if (cameraBox.x <= Math.abs(cameraWithBox.position.x)) {
+    cameraWithBox.position.x = cameraWithBox.position.x--
+  }
+}
+
+function shouldPanCameraDown({ canvas, camera }) {
+  //console.log('log shouldPanCameraDown')
+  /* if (cameraBox.position.y + this.velocity.y <= 0) return
+
+  if (cameraBox.position.y <= Math.abs(camera.position.y)) {
+    camera.position.y -= this.velocity.y
+  } */
+}
+
+function shouldPanCameraUp({ canvas, camera }) {
+  // console.log('log shouldPanCameraUp')
+  /* if (cameraBox.position.y + cameraBox.height + this.velocity.y >= 432) return
+
+  const scaledCanvasHeight = canvas.height / 4
+
+  if (
+    cameraBox.position.y + cameraBox.height >=
+    Math.abs(camera.position.y) + scaledCanvasHeight
+  ) {
+    camera.position.y -= this.velocity.y
+  } */
+}

js/input.js

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+//-------------------------------------------------------------------------
+// 3.1 INPUT
+//-------------------------------------------------------------------------
+
+function onkey(ev, key, down) {
+  switch (key) {
+    case KEY.LEFT:
+      player.left = down
+      shouldPanCameraToTheRight({ canvas, cameraWithBox })
+      ev.preventDefault()
+      return false
+    case KEY.RIGHT:
+      player.right = down
+      shouldPanCameraToTheLeft({ canvas, cameraWithBox })
+      ev.preventDefault()
+      return false
+    case KEY.X:
+      player.jump = down
+      // console.log('log Key X')
+      shouldPanCameraDown({ canvas, cameraWithBox })
+      ev.preventDefault()
+      return false
+    case KEY.Y:
+      console.log('log shoot')
+      //  player.shooting = down
+      shoot(player)
+      ev.preventDefault()
+      return false
+    case KEY.UP:
+      console.log('log Key Up')
+      player.up = down
+      shouldPanCameraDown({ canvas, cameraWithBox })
+      ev.preventDefault()
+      return false
+    case KEY.DOWN:
+      console.log('log Key Down')
+      player.down = down
+      ev.preventDefault()
+      return false
+    case KEY.ENTER:
+      console.log('log Key Enter')
+      player.interact = down
+      ev.preventDefault()
+      return false
+    case KEY.SPACE:
+      console.log('log Key Space')
+      ev.preventDefault()
+      return false
+  }
+}

js/main.js

@@ -0,0 +1,97 @@
+function main() {
+  //-------------------------------------------------------------------------
+  // 6. THE GAME LOOP
+  //-------------------------------------------------------------------------
+
+  var counter = 0,
+    dt = 0,
+    now,
+    last = timestamp(),
+    fpsmeter = new FPSMeter({
+      decimals: 0,
+      graph: true,
+      theme: 'dark',
+      left: '5px',
+    })
+
+  function frame() {
+    fpsmeter.tickStart()
+    now = timestamp()
+    dt = dt + Math.min(1, (now - last) / 1000)
+    while (dt > step) {
+      dt = dt - step
+
+      // * Update wird pausiert bei Toggle 'p'.
+      if (!paused) {
+        update(step)
+      }
+    }
+
+    render(ctx, counter, dt, currentLevel)
+
+    last = now
+    counter++
+    fpsmeter.tick()
+    requestAnimationFrame(frame, canvas)
+  }
+
+  document.addEventListener(
+    'keydown',
+    function (ev) {
+      return onkey(ev, ev.key, true)
+    },
+    false
+  )
+  document.addEventListener(
+    'keyup',
+    function (ev) {
+      return onkey(ev, ev.key, false)
+    },
+    false
+  )
+
+  // * EventListener für Pause-Taste
+  window.addEventListener('keydown', function (e) {
+    var key = e.key
+    if (key === 'p') {
+      // p key
+      togglePause()
+    }
+  })
+  // * EventListener für DevInfos Toggle
+  window.addEventListener('keydown', function (e) {
+    var key = e.key
+    if (key === 'o') {
+      // p key
+      toggleDevInfos()
+    }
+  })
+
+  // ! Vielleicht kann ich statt des setup() an dieser Stelle auch eine gameStart() Funktion erstellen, die beim erstmaligen Start alles erledigt. Später wird dann ja immer die _initLevel() aufgerufen.
+  setup(currentLevel.levelData) // ! Was brauche ich hier, damit das variabel alle Level laden kann?
+
+  console.log('log monsters ', monsters)
+
+  frame()
+}
+
+// * window onload function
+;(function () {
+  //-------------------------------------------------------------------------
+  // POLYFILLS
+  //-------------------------------------------------------------------------
+
+  if (!window.requestAnimationFrame) {
+    // http://paulirish.com/2011/requestanimationframe-for-smart-animating/
+    window.requestAnimationFrame =
+      window.webkitRequestAnimationFrame ||
+      window.mozRequestAnimationFrame ||
+      window.oRequestAnimationFrame ||
+      window.msRequestAnimationFrame ||
+      function (callback, element) {
+        window.setTimeout(callback, 1000 / 60)
+      }
+  }
+
+  main()
+})()

js/render.js

@@ -0,0 +1,375 @@
+//-------------------------------------------------------------------------
+// 4. RENDERING
+//-------------------------------------------------------------------------
+
+function render(ctx, frame, dt, thiscurrentLevel) {
+  // ? Kann ich mich eigentlich mit scale und translate noch weiter an Pico-8 orientieren und in den variables sowas wie scale = ctx.scale oder so erstellen?
+  // * Disable Image Smoothing
+  ctx.mozImageSmoothingEnabled = false
+  ctx.webkitImageSmoothingEnabled = false
+  ctx.msImageSmoothingEnabled = false
+  ctx.imageSmoothingEnabled = false
+
+  ctx.save()
+  ctx.scale(
+    Math.round(thiscurrentLevel.scalingFactor / 2),
+    Math.round(thiscurrentLevel.scalingFactor / 2)
+  )
+
+  ctx.clearRect(0, 0, width, height)
+  renderCamera()
+  //renderCameraWithBox()
+  renderBackground(ctx, thiscurrentLevel.backgroundAtlas, bgCells)
+  renderMap(ctx, thiscurrentLevel.levelAtlas, cells)
+  renderPlayer(ctx, playerAtlas, dt, frame)
+  renderBullets(ctx, itemsAtlas, dt, frame)
+  renderMonsters(ctx, enemyAtlas, dt, frame)
+  renderTreasure(ctx, itemsAtlas, dt, frame)
+  renderPickups(ctx, itemsAtlas, dt, frame)
+  renderForeground(ctx, thiscurrentLevel.foregroundAtlas, fgCells)
+  renderLiquids(ctx, thiscurrentLevel.foregroundAtlas, fgCells)
+
+  // * Draw CameraBox
+  //renderCameraBox()
+  ctx.restore()
+  renderPause()
+  renderHud(ctx, meterAtlas, dt, frame)
+  renderHudSprites()
+  //fadeScreen(frame, dt)
+  renderDevInfos()
+}
+
+// Map Limit Variables
+
+// * Das hier ist die allgemeine Funktion um Tiles aus dem TileAtlas auf den Canvas zu malen.
+function drawTile(levelAtlas, cell, dx, dy, opacity) {
+  levelAtlas.sourceY =
+    Math.floor(cell / levelAtlas.atlasCol) * levelAtlas.tileSize
+  levelAtlas.sourceX = (cell % levelAtlas.atlasCol) * levelAtlas.tileSize
+  // ? Wofür stehen die Werte sWidth, sHeight, dWidth, dHeight
+
+  ctx.globalAlpha = opacity
+  // ! Kann ich die ganzen festen Zahlen als Variablen aus der Map holen?
+  ctx.drawImage(
+    levelAtlas.tileAtlas,
+    levelAtlas.sourceX,
+    levelAtlas.sourceY,
+    16,
+    16,
+    dx * 16,
+    dy * 16,
+    16,
+    16
+  )
+}
+
+function renderBackground(ctx, levelAtlas) {
+  var x, y, cell
+  for (y = 0; y < mapHeight; y++) {
+    for (x = 0; x < mapWidth; x++) {
+      cell = bgTcell(x, y, mapWidth)
+      if (cell) {
+        drawTile(levelAtlas, cell - levelAtlas.offset, x, y)
+      }
+    }
+  }
+}
+
+function renderForeground(ctx, levelAtlas) {
+  var x, y, cell
+  for (y = 0; y < mapHeight; y++) {
+    for (x = 0; x < mapWidth; x++) {
+      cell = fgTcell(x, y, mapWidth)
+      if (cell) {
+        drawTile(levelAtlas, cell - levelAtlas.offset, x, y)
+      }
+    }
+  }
+}
+
+function renderLiquids(ctx, levelAtlas) {
+  var x, y, cell
+  for (y = 0; y < mapHeight; y++) {
+    for (x = 0; x < mapWidth; x++) {
+      cell = lqTcell(x, y, mapWidth)
+      if (cell) {
+        drawTile(levelAtlas, cell - levelAtlas.offset, x, y, 0.5)
+      }
+    }
+  }
+}
+
+function renderMap(ctx, levelAtlas) {
+  var x, y, cell
+  for (y = 0; y < mapHeight; y++) {
+    for (x = 0; x < mapWidth; x++) {
+      cell = tcell(x, y, mapWidth)
+      if (cell) {
+        drawTile(levelAtlas, cell - levelAtlas.offset, x, y)
+      }
+    }
+  }
+}
+
+// * Sprite Animation
+function drawSprite(entity, spriteAtlas, dt, frame) {
+  /* entity.start.x === 48 &&
+    entity.start.y === 656 &&
+    console.log('log frame ', entity.sprites.idle)
+ */
+
+  let sprites = entity.sprites
+
+  let isJumping = entity.jumping || entity.falling
+
+  let isRunning =
+    (entity.right === true && !isJumping) ||
+    (entity.left === true && !isJumping)
+
+  let isShooting = entity.shooting || false
+
+  let sprite =
+    !!sprites.run && isRunning
+      ? sprites.run
+      : !!sprites.jump && isJumping
+      ? sprites.jump
+      : !!sprites.shoot && isShooting
+      ? sprites.shoot
+      : sprites.idle
+
+  const x = entity.bullet ? entity.x : entity.x + entity.dx * dt
+  const y = entity.bullet
+    ? entity.y - entity.height * 2
+    : entity.y + entity.dy * dt
+  const flipped = entity.flipped
+  const width = entity.bullet ? entity.width * 4 : entity.width
+  const height = entity.bullet ? entity.height * 4 : entity.height
+
+  let spriteTile = sprite.tiles[sprite.currentFrame]
+
+  /*   entity.pickups &&
+    console.log(
+      'log drawSprite currentFrame ',
+      sprite.tiles[sprite.currentFrame]
+    ) */
+
+  // make an image position using the
+  // current row and colum
+  spriteAtlas.sourceY =
+    Math.floor(spriteTile / spriteAtlas.atlasCol) * spriteAtlas.tileSize
+  spriteAtlas.sourceX =
+    (spriteTile % spriteAtlas.atlasCol) * spriteAtlas.tileSize
+
+  ctx.save()
+  // * Flip Sprite
+  ctx.scale(flipped ? -1 : 1, 1)
+  let dx = flipped ? -x - width : x
+
+  ctx.drawImage(
+    spriteAtlas.tileAtlas,
+    spriteAtlas.sourceX,
+    spriteAtlas.sourceY,
+    16, // * source Höhe
+    16, // * source Breite
+    dx,
+    y,
+    width, // * player Höhe
+    height // * player Breite
+  )
+
+  ctx.restore()
+  updateFrames(frame, sprite)
+
+  // entity.treasure && console.log('log drawSprite ', entity)
+}
+
+function updateFrames(frame, sprite) {
+  /* entity.start.x === 48 &&
+    entity.start.y === 656 &&
+   console.log('log  frame ', entity) */
+
+  if (frame % sprite.framebuffer === 0) {
+    if (sprite.currentFrame + 1 < sprite.tiles.length) sprite.currentFrame++
+    else if (sprite.loop) sprite.currentFrame = 0
+  }
+}
+// * Render Player
+function renderPlayer(ctx, spriteAtlas, dt, frame) {
+  if (player.vul === false) {
+    ctx.globalAlpha = 0.25 + tweenTreasure(frame * 3, 60)
+  }
+  drawSprite(player, spriteAtlas, dt, frame)
+  ctx.globalAlpha = 1
+}
+
+function renderHud(ctx, spriteAtlas, dt, frame) {
+  var n, max
+  const hudScaling = scalingFactor / 2
+
+  const hitpoints = globalObject.hitpoints
+  const killed = globalObject.killed
+  const collected = globalObject.collected
+
+  ctx.fillStyle = COLOR.GOLD
+  for (n = 0, max = collected; n < max; n++)
+    ctx.fillRect(
+      t2p(1 + n) * hudScaling,
+      t2p(1) * hudScaling,
+      (TILE / 2) * hudScaling,
+      (TILE / 2) * hudScaling
+    )
+
+  ctx.fillStyle = COLOR.SLATE
+  for (n = 0, max = killed; n < max; n++)
+    ctx.fillRect(
+      t2p(1 + n) * hudScaling,
+      t2p(2) * hudScaling,
+      (TILE / 2) * hudScaling,
+      (TILE / 2) * hudScaling
+    )
+
+  // ! provisorische Hitpoint-Anzeige
+  ctx.fillStyle = 'red'
+  if (hitpoints === 1) {
+    ctx.globalAlpha = 0.25 + tweenTreasure(frame, 60)
+  }
+  for (n = 0, max = hitpoints; n < max; n++)
+    ctx.fillRect(
+      t2p(1 + n) * hudScaling,
+      t2p(3) * hudScaling,
+      (TILE / 2) * hudScaling,
+      (TILE / 2) * hudScaling
+    )
+  // ! Der Atlas funktioniert so nicht weil die Tiles nicht quadratisch sind.
+  // drawSprite(t, spriteAtlas, dt, frame)
+  ctx.globalAlpha = 1
+}
+
+function fadeScreen(frame, dt) {
+  ctx.fillStyle = 'black'
+  ctx.globalAlpha = 0
+  let duration = 100
+
+  pulse = frame % duration
+
+  if (pulse < duration) {
+    opacity = pulse / duration
+  } else {
+    opacity = 0
+  }
+
+  ctx.fillRect(0, 0, width, height)
+  ctx.globalAlpha = opacity
+
+  //setInterval(show(), 800)
+  // console.log('log opacity ', opacity)
+  // console.log('log fade frame ', frame)
+  // console.log('log fade pulse ', pulse)
+}
+
+// * Render Pause Function
+function renderPause() {
+  if (paused) {
+    ctx.save()
+    ctx.scale(scalingFactor / 2, scalingFactor / 2)
+
+    ctx.font = '12px C64 TrueType'
+    ctx.fillStyle = 'white'
+    ctx.textAlign = 'center'
+    ctx.fillText('- pause -', scaledCanvas.width, scaledCanvas.height)
+    ctx.restore()
+  }
+}
+
+function renderCameraBox() {
+  ctx.fillStyle = 'rgba(0, 0, 255, 0.2)'
+  ctx.fillRect(cameraBox.x, cameraBox.y, cameraBox.width, cameraBox.height)
+}
+
+function renderMonsters(ctx, spriteAtlas, dt, frame) {
+  ctx.fillStyle = COLOR.SLATE
+  var n, max, monster
+  for (n = 0, max = monsters.length; n < max; n++) {
+    monster = monsters[n]
+
+    if (monster.sprites === undefined && !monster.dead)
+      ctx.fillRect(
+        monster.x + monster.dx * dt,
+        monster.y + monster.dy * dt,
+        TILE,
+        TILE
+      )
+    if (monster.sprites !== undefined && !monster.dead) {
+      drawSprite(monster, spriteAtlas, dt, frame)
+    }
+  }
+}
+
+function renderPickups(ctx, spriteAtlas, dt, frame) {
+  //ctx.globalAlpha = 0.25 + tweenTreasure(frame, 60)
+  var n, max, p
+  for (n = 0, max = pickups.length; n < max; n++) {
+    p = pickups[n]
+
+    //console.log('log p.sprites.currentsprite ', p.sprites.currentFrame)
+
+    if (p.sprites !== undefined && !p.collected) {
+      drawSprite(p, spriteAtlas, dt, frame)
+    }
+  }
+  //ctx.globalAlpha = 1
+}
+
+function renderTreasure(ctx, spriteAtlas, dt, frame) {
+  ctx.fillStyle = COLOR.GOLD
+  ctx.globalAlpha = 0.25 + tweenTreasure(frame, 60)
+  var n, max, t
+  for (n = 0, max = treasure.length; n < max; n++) {
+    t = treasure[n]
+    //if (!t.collected) ctx.fillRect(t.x, t.y + TILE / 3, TILE, (TILE * 2) / 3)
+
+    if (t.sprites !== undefined && !t.collected) {
+      // console.log('log treasure entity ', t)
+      drawSprite(t, spriteAtlas, dt, frame)
+    }
+  }
+  ctx.globalAlpha = 1
+}
+
+function tweenTreasure(frame, duration) {
+  const half = duration / 2
+  pulse = frame % duration
+  return pulse < half ? pulse / half : 1 - (pulse - half) / half
+}
+
+function renderBullets(ctx, spriteAtlas, dt, frame) {
+  ctx.fillStyle = COLOR.GOLD
+
+  var n, max, bullet
+
+  for (n = 0, max = bullets.length; n < max; n++) {
+    bullet = bullets[n]
+
+    switch (bullet.ammoType) {
+      case 'simpleGun':
+        bullet.sprites = simpleBullet.sprites
+        break
+      case 'advancedGun':
+        bullet.sprites = simpleBullet.sprites
+        break
+    }
+
+    //console.log('log bullet ', bullet.sprites)
+    //console.log('log bullet spriteAtlas ', spriteAtlas)
+
+    if (bullet !== undefined) {
+      if (bullet.sprites === undefined) {
+        ctx.fillRect(bullet.x, bullet.y, ammoType.width, ammoType.height)
+      }
+      if (bullet.sprites !== undefined) {
+        console.log('log bullet entity ', bullet)
+        drawSprite(bullet, spriteAtlas, dt, frame)
+      }
+    }
+  }
+}

js/setup.js

@@ -0,0 +1,150 @@
+//-------------------------------------------------------------------------
+// 5. LOAD THE MAP
+//-------------------------------------------------------------------------
+
+// ! Wenn ich die Setup-Funktion zum Levelwechsel aufrufe, dann werden die Variablen nicht upgedated!
+
+// * Die setup Funktion finde ich gut, weil sie alle Infos aus einer map mit mehreren Layern erhalten kann.
+function setup(map) {
+  var background = map.layers[0]?.data,
+    data = map.layers[1].data,
+    objects = map.layers[2].objects,
+    foreground = map.layers[3]?.data,
+    liquidTiles = map.layers[4]?.data || null,
+    n,
+    obj,
+    entity
+
+  for (n = 0; n < objects.length; n++) {
+    obj = objects[n]
+
+    const entityType = obj.type || obj.class
+    const entityName = obj.name
+    const entityClass = obj.class
+
+    const entityProperties = Array.isArray(obj.properties)
+      ? Object.fromEntries(
+          !!obj.properties &&
+            obj.properties?.map((obj) => [obj.name, obj.value])
+        )
+      : !!obj.properties
+      ? obj.properties
+      : {}
+
+    // * Hier werden alle actors/entities in die entsprechenden Ojekte gepushed.
+    entity = setupEntity(obj, entityType, entityProperties, entityName)
+
+    switch (entityType) {
+      case 'player':
+        player = entity
+        break
+      case 'monster':
+        monsters.push(entity)
+        break
+      case 'slimeMonster':
+        monsters.push(entity)
+        break
+      case 'treasure':
+        treasure.push(entity)
+        break
+
+      case 'ammo':
+        pickups.push(entity)
+        break
+      case 'health':
+        pickups.push(entity)
+        break
+      case 'extralife':
+        pickups.push(entity)
+        break
+
+      case 'water':
+        liquids.push(entity)
+        break
+      case 'door':
+        doors.push(entity)
+        break
+    }
+  }
+
+  cells = data
+  bgCells = background
+  fgCells = foreground
+  lqCells = liquidTiles
+}
+
+// * Diese Funktion entspricht grob meiner actor init Funktion.
+// ? Muss ich noch eine Sprite Animation Funktion erstellen, die ihre Daten aus dem Entity Object für alle Entities (player, monster, etc.) erhält?
+function setupEntity(obj, entityType, entityProperties, entityName) {
+  let entityTemplate =
+    entityName == 'monster'
+      ? bounderMonster
+      : entityName == 'player'
+      ? playerObject
+      : entityName == 'slimeMonster'
+      ? slimeMonster
+      : entityName == 'treasure'
+      ? coinTreasure
+      : entityName == 'ammo'
+      ? ammo
+      : entityName == 'health'
+      ? health
+      : entityName == 'extralife'
+      ? extralife
+      : entityName == 'door'
+      ? null
+      : null
+
+  let entitySprites = entityTemplate?.sprites
+
+  const entityMaxHitpoints =
+    entityType == 'player' ? playerObject.maxHitpoints : 1
+
+  const entityCurrentHitpoints =
+    entityType == 'player'
+      ? playerObject.currentHitpoints
+      : !!entityTemplate?.currentHitpoints
+      ? entityTemplate?.currentHitpoints
+      : 1
+
+  console.log('log entity ', entity)
+
+  var entity = {}
+  entity.x = obj.x
+  entity.y = obj.y
+  entity.dx = 0
+  entity.dy = 0
+  entity.gravity = METER * (entityProperties.gravity || GRAVITY)
+  entity.maxdx = METER * (entityProperties.maxdx || MAXDX)
+  entity.maxdy = METER * (entityProperties.maxdy || MAXDY)
+  entity.impulse = METER * (entityProperties.impulse || IMPULSE)
+  entity.accel = entity.maxdx / (entityProperties.accel || ACCEL)
+  entity.friction = entity.maxdx / (entityProperties.friction || FRICTION)
+  entity.monster = entityType == 'monster'
+  entity.slimeMonster = entityType == 'slimeMonster'
+  entity.player = entityType == 'player'
+  entity.treasure = entityType == 'treasure'
+  entity.ammo = entityType == 'ammo'
+  entity.health = entityType == 'health'
+  entity.extralife = entityType == 'extralife'
+  entity.water = entityType == 'water'
+  entity.door = entityType == 'door'
+  entity.leadsTo = entityProperties.leadsTo
+  entity.left = entityProperties.left
+  entity.right = entityProperties.right
+  entity.up = entityProperties.up || false
+  entity.down = entityProperties.down || false
+  entity.start = { x: obj.x, y: obj.y }
+  entity.killed = 0
+  entity.collected = false
+  entity.sprites = entitySprites
+  entity.flipped = false
+  entity.width = obj.width
+  entity.height = obj.height
+  entity.maxHitpoints = entityMaxHitpoints
+  entity.currentHitpoints = entityCurrentHitpoints
+  entity.hurt = false
+  entity.vul = true
+
+  return entity
+}

js/update.js

@@ -0,0 +1,411 @@
+//-------------------------------------------------------------------------
+// 3. UPDATE LOOP
+//-------------------------------------------------------------------------
+
+function update(dt) {
+  updatePlayer(dt)
+  updateBullets(dt)
+  updateMonsters(dt)
+  checkTreasure()
+  checkPickups()
+  checkLiquids()
+  // updateDoors(dt)
+  checkDoors()
+
+  // ! Vielleicht eigene update Funktion für Musik schreiben
+  // theme.level1.play()
+}
+
+function updatePlayer(dt) {
+  updateEntity(player, dt)
+}
+
+function updateMonsters(dt) {
+  var n, max
+  for (n = 0, max = monsters.length; n < max; n++)
+    updateMonster(monsters[n], dt)
+}
+
+function updateMonster(monster, dt) {
+  monster.slimeMonster && console.log('log monster ', monster)
+  if (!monster.dead) {
+    updateEntity(monster, dt)
+    if (
+      overlap(player.x, player.y, TILE, TILE, monster.x, monster.y, TILE, TILE)
+    ) {
+      if (player.dy > 0 && monster.y - player.y > TILE / 2) killMonster(monster)
+      else if (player.vul) {
+        reduceHitpoints(player, 1)
+      }
+    }
+  }
+}
+
+function shoot(player) {
+  //globalObject.ammo > 0 ? sfx.shoot.play() : sfx.click.play()
+  if (player.shooting) return
+  player.shooting = true
+  const bulletX = player.x
+  const bulletY = player.y
+  const direction = player.flipped
+  const weaponType = player?.currentWeapon || 'simpleGun'
+
+  if (globalObject.ammo > 0) {
+    sfx.shoot.play()
+    globalObject.ammo--
+    bullets.push({
+      bullet: true,
+      width: 4,
+      height: 4,
+      flipped: player.flipped,
+      originX: bulletX,
+      originY: bulletY,
+      x: bulletX,
+      y: bulletY + player.height / 2,
+      directionLeft: direction,
+      ammoType: weaponType,
+      damage: 1,
+    })
+  } else {
+    sfx.click.play()
+  }
+  setTimeout(() => {
+    player.shooting = false
+  }, 200)
+}
+
+function updateBullets(dt) {
+  var n, max
+  for (n = 0, max = bullets.length; n < max; n++) updateBullet(bullets[n], dt)
+}
+
+function updateBullet(bullet, dt) {
+  if (!!bullet) {
+    if (bullet.directionLeft) {
+      bullet.x = bullet.x - ammoType.velocity
+    } else {
+      bullet.x = bullet.x + ammoType.velocity
+    }
+    var n, max, monster, thisBullet
+    for (n = 0, max = monsters.length; n < max; n++) {
+      monster = monsters[n]
+      thisBullet = bullet
+      if (!monster.dead) {
+        if (
+          overlap(
+            thisBullet.x,
+            thisBullet.y,
+            ammoType.width,
+            ammoType.height,
+            monster.x,
+            monster.y,
+            TILE,
+            TILE
+          )
+        )
+          reduceHitpoints(monster, bullet.damage),
+            sfx.explode.play(),
+            destroyBullet(bullet)
+      }
+    }
+    if (
+      (!bullet.directionLeft &&
+        bullet.x > bullet.originX + ammoType.distance) ||
+      (bullet.directionLeft && bullet.x < bullet.originX - ammoType.distance)
+    ) {
+      destroyBullet(bullet)
+    }
+  }
+}
+
+function destroyBullet(bullet) {
+  const index = bullets.indexOf(bullet)
+  if (index > -1) {
+    bullets.splice(index, 1)
+  }
+}
+
+function checkTreasure() {
+  var n, max, t
+  for (n = 0, max = treasure.length; n < max; n++) {
+    t = treasure[n]
+    if (
+      !t.collected &&
+      overlap(player.x, player.y, TILE, TILE, t.x, t.y, TILE, TILE)
+    )
+      collectTreasure(t)
+  }
+}
+
+function checkPickups() {
+  var n, max, p
+  for (n = 0, max = pickups.length; n < max; n++) {
+    p = pickups[n]
+    if (
+      !p.collected &&
+      overlap(player.x, player.y, TILE, TILE, p.x, p.y, TILE, TILE)
+    )
+      collectPickup(p)
+  }
+}
+
+function collectPickup(p) {
+  // console.log('log pickup ', p)
+
+  if (p.extralife) {
+    addExtraLife(p)
+  }
+  if (p.ammo) {
+    addAmmo(p)
+  }
+  if (p.health) {
+    addHitPoints(p)
+  }
+}
+
+function addExtraLife(p) {
+  globalObject.lifes++
+  p.collected = true
+  sfx.smb_powerup.play()
+}
+
+function addHitPoints(p) {
+  if (globalObject.hitpoints < globalObject.maxHitpoints) {
+    globalObject.hitpoints++
+    p.collected = true
+    sfx.stomp.play()
+  }
+}
+
+function addAmmo(p) {
+  if (globalObject.ammo < globalObject.maxAmmo) {
+    globalObject.ammo++
+    p.collected = true
+    sfx.kick.play()
+  }
+}
+
+function checkLiquids() {
+  var n, max, l
+  for (n = 0, max = liquids.length; n < max; n++) {
+    l = liquids[n]
+    if (overlap(player.x, player.y, TILE, TILE, l.x, l.y, l.width, l.height)) {
+      !player.swimming && sfx.splash.play()
+      player.dy = player.dy / 1.15
+      if (!player.swimming) player.jumping = false
+      player.swimming = true
+    } else {
+      player.swimming = false
+    }
+  }
+}
+
+function checkDoors() {
+  // ! Hier habe ich rudimentär einen Levelwechsel eingebaut.
+  // ! Was noch fehlt ist, dass ein globales Player-Objekt beibehalten wird.
+  var n, max, t
+  for (n = 0, max = doors.length; n < max; n++) {
+    t = doors[n]
+    if (
+      overlap(
+        player.x,
+        player.y,
+        TILE * 2,
+        TILE * 2,
+        t.x,
+        t.y,
+        TILE * 2,
+        TILE * 2
+      )
+    )
+      player.interact && useDoor(t)
+  }
+}
+
+function useDoor(t) {
+  let leadsTo
+  switch (t.leadsTo) {
+    case 'level1':
+      leadsTo = levelObject.level1
+      break
+    case 'level2':
+      leadsTo = levelObject.level2
+      break
+    case 'level3':
+      leadsTo = levelObject.level3
+      break
+  }
+  sfx.openDoor.play()
+  levelTransition(leadsTo)
+}
+
+function levelTransition(level) {
+  setTimeout(() => {
+    _initLevel(level)
+  }, 800)
+}
+
+function killMonster(monster) {
+  globalObject.killed++
+  monster.dead = true
+  sfx.killMonster.play()
+}
+
+// * Take Damage Function
+function reduceHitpoints(entity, damage) {
+  if (
+    entity.player ? globalObject.hitpoints > 1 : entity.currentHitpoints > 1
+  ) {
+    entity.player
+      ? (globalObject.hitpoints -= damage)
+      : (entity.currentHitpoints -= damage)
+    entity.vul = false
+    entity.hurt = true
+    sfx.takeDamage.play()
+    setTimeout(() => {
+      entity.vul = true
+      entity.hurt = false
+    }, 1500)
+  } else killEntity(entity)
+}
+
+function killEntity(entity) {
+  console.log('killEntity: ', entity)
+  if (entity.player === true) {
+    killPlayer(entity)
+  }
+  if (entity.monster === true) {
+    killMonster(entity)
+  }
+}
+
+function killPlayer(player) {
+  sfx.die.play()
+  player.x = player.start.x
+  player.y = player.start.y
+  player.dx = player.dy = 0
+  globalObject.hitpoints = player.maxHitpoints
+  globalObject.lifes--
+  console.log('log globalObject: ', globalObject.lifes)
+}
+
+function collectTreasure(t) {
+  globalObject.collected++
+  t.collected = true
+  sfx.pickup.play()
+}
+
+function updateEntity(entity, dt) {
+  var wasleft = entity.dx < 0,
+    wasright = entity.dx > 0,
+    falling = entity.falling,
+    swimming = entity.swimming || false,
+    friction =
+      entity.friction * (falling && !swimming ? 0.5 : swimming ? 0.1 : 1),
+    impulse = entity.impulse,
+    swimImpulse = entity.impulse / 3,
+    accel = entity.accel * (falling && !swimming ? 0.5 : swimming ? 0.1 : 1),
+    gravity = swimming ? METER * 8 : METER * GRAVITY
+
+  entity.ddx = 0
+  entity.ddy = gravity // ! Hier wir gravity angewandt
+
+  // * Hier wird die Entity bewegt.
+  if (entity.left) (entity.ddx = entity.ddx - accel), (entity.flipped = true)
+  else if (wasleft) entity.ddx = entity.ddx + friction
+
+  if (entity.right) (entity.ddx = entity.ddx + accel), (entity.flipped = false)
+  else if (wasright) entity.ddx = entity.ddx - friction
+
+  if (entity.jump) {
+    if (!entity.jumping && !falling && !swimming) {
+      jump(entity)
+    } else if (!entity.jumping && swimming) {
+      swim(entity)
+    }
+  }
+
+  function jump(entity) {
+    sfx.jump.play()
+    entity.ddy = entity.ddy - impulse // an instant big force impulse
+    entity.jumping = true
+  }
+
+  function swim(entity) {
+    sfx.swim.play()
+    entity.ddy = entity.down
+      ? entity.ddy + swimImpulse
+      : entity.up
+      ? entity.ddy - swimImpulse * 2
+      : entity.ddy - swimImpulse
+    entity.jumping = true
+    setTimeout(() => {
+      entity.jumping = false
+    }, 400)
+  }
+
+  // ! "dt" ist hier identisch mit "step", was in der index.js in die update() gegeben wird. Konstant bei ca. 0.01666
+  //console.log('log entity.x + dt * entity.dx: ', player.x + dt * player.dx)
+
+  entity.x = entity.x + dt * entity.dx
+  entity.y = entity.y + dt * entity.dy
+  entity.dx = bound(entity.dx + dt * entity.ddx, -entity.maxdx, entity.maxdx)
+  entity.dy = bound(entity.dy + dt * entity.ddy, -entity.maxdy, entity.maxdy)
+
+  if ((wasleft && entity.dx > 0) || (wasright && entity.dx < 0)) {
+    entity.dx = 0 // clamp at zero to prevent friction from making us jiggle side to side
+  }
+
+  var tx = p2t(entity.x),
+    ty = p2t(entity.y),
+    nx = entity.x % TILE,
+    ny = entity.y % TILE,
+    cell = tcell(tx, ty, mapWidth), //! Was ist das hier?
+    cellright = tcell(tx + 1, ty, mapWidth),
+    celldown = tcell(tx, ty + 1, mapWidth),
+    celldiag = tcell(tx + 1, ty + 1, mapWidth)
+
+  // ? Ist das hier der Collision Check?
+
+  if (entity.dy > 0) {
+    if ((celldown && !cell) || (celldiag && !cellright && nx)) {
+      entity.y = t2p(ty)
+      entity.dy = 0
+      entity.falling = false
+      entity.jumping = false
+      ny = 0
+    }
+  } else if (entity.dy < 0) {
+    if ((cell && !celldown) || (cellright && !celldiag && nx)) {
+      entity.y = t2p(ty + 1)
+      entity.dy = 0
+      cell = celldown
+      cellright = celldiag
+      ny = 0
+    }
+  }
+
+  if (entity.dx > 0) {
+    if ((cellright && !cell) || (celldiag && !celldown && ny)) {
+      entity.x = t2p(tx)
+      entity.dx = 0
+    }
+  } else if (entity.dx < 0) {
+    if ((cell && !cellright) || (celldown && !celldiag && ny)) {
+      entity.x = t2p(tx + 1)
+      entity.dx = 0
+    }
+  }
+
+  if (entity.monster || entity.slimeMonster) {
+    if (entity.left && (cell || !celldown)) {
+      entity.left = false
+      entity.right = true
+    } else if (entity.right && (cellright || !celldiag)) {
+      entity.right = false
+      entity.left = true
+    }
+  }
+
+  entity.falling = !(celldown || (nx && celldiag))
+}

js/utils.js

@@ -0,0 +1,165 @@
+//-------------------------------------------------------------------------
+// 1. UTILITIES
+//-------------------------------------------------------------------------
+
+function timestamp() {
+  return window.performance && window.performance.now
+    ? window.performance.now()
+    : new Date().getTime()
+}
+
+function bound(x, min, max) {
+  return Math.max(min, Math.min(max, x))
+}
+
+/* function get(url, onsuccess) {
+    var request = new XMLHttpRequest();
+    request.onreadystatechange = function () {
+      if (request.readyState == 4 && request.status == 200) onsuccess(request);
+    };
+    request.open("GET", url, true);
+    request.send();
+  } */
+
+function overlap(x1, y1, w1, h1, x2, y2, w2, h2) {
+  return !(
+    x1 + w1 - 1 < x2 ||
+    x2 + w2 - 1 < x1 ||
+    y1 + h1 - 1 < y2 ||
+    y2 + h2 - 1 < y1
+  )
+}
+
+// * SFX function
+function sound(src, volume) {
+  this.sound = document.createElement('audio')
+  this.sound.src = src
+  this.sound.setAttribute('preload', 'auto')
+  this.sound.setAttribute('controls', 'none')
+  this.sound.style.display = 'none'
+  document.body.appendChild(this.sound)
+  this.sound.volume = volume
+  this.play = function () {
+    this.sound.play()
+  }
+  this.stop = function () {
+    this.sound.pause()
+  }
+}
+
+// * Music function
+function music(src, volume) {
+  this.music = document.createElement('audio')
+  this.music.src = src
+  this.music.setAttribute('preload', 'auto')
+  this.music.setAttribute('controls', 'none')
+  this.music.setAttribute('loop', 'loop')
+  this.music.style.display = 'none'
+  document.body.appendChild(this.music)
+  this.music.volume = volume
+  this.play = function () {
+    this.music.play()
+  }
+  this.stop = function () {
+    this.music.pause()
+  }
+}
+
+// * Pause function
+function togglePause() {
+  console.log('log togglePause', paused)
+  if (!paused) {
+    paused = true
+  } else if (paused) {
+    paused = false
+  }
+}
+
+function toggleDevInfos() {
+  if (!showDevInfo) {
+    showDevInfo = true
+  } else if (showDevInfo) {
+    showDevInfo = false
+  }
+}
+
+function renderHudSprites() {
+  const hudObject = {
+    player_hitpoints: player.currentHitpoints,
+    player_collected: player.collected,
+    player_lifes: globalObject.lifes,
+    player_ammo: globalObject.ammo,
+  }
+
+  function hitpoints() {
+    ctx.save()
+    ctx.scale(scalingFactor / 4, scalingFactor / 4)
+    ctx.textAlign = 'left'
+    ctx.font = '12px C64 TrueType'
+
+    ctx.fillStyle = 'white'
+    ctx.fillText(`lifes: ${hudObject.player_lifes}`, 50, 50)
+    ctx.fillText(`ammo: ${hudObject.player_ammo}`, 200, 50)
+    ctx.restore()
+  }
+  hitpoints()
+}
+
+// * Renderfunktion für DevInfos
+function renderDevInfos() {
+  ctx.save()
+  ctx.scale(scalingFactor / 6, scalingFactor / 6)
+  if (showDevInfo) {
+    const backgroundColor = 'rgba(18, 64, 90, 0.15)'
+    const color = 'white'
+    const lineHeight = 18
+
+    const devObject = {
+      player_accel: player.accel,
+      player_ddx: player.ddx,
+      player_ddy: player.ddy,
+      player_dx: player.dx,
+      player_dy: player.dy,
+      player_interact: player.interact,
+      player_falling: player.falling,
+      player_friction: player.friction,
+      player_gravity: player.gravity,
+      player_impulse: player.impulse,
+      player_jumping: player.jumping,
+      player_swimming: player.swimming,
+      player_shooting: player.shooting,
+      player_left: player.left,
+      player_maxdx: player.maxdx,
+      player_maxdy: player.maxdy,
+      player_right: player.right,
+      player_x: player.x,
+      player_y: player.y,
+      player_vul: player.vul,
+      player_hurt: player.hurt,
+      player_flipped: player.flipped,
+      canvas_width: canvas.height,
+      cameraWithBox_x: cameraWithBox.position.x,
+    }
+
+    const canvas_width = canvas.width
+    const canvas_height = canvas.height
+
+    function text() {
+      ctx.textAlign = 'left'
+      ctx.font = '12px C64 TrueType'
+      for (const [index, [key, value]] of Object.entries(
+        Object.entries(devObject)
+      )) {
+        const newIndex = Number(index) + 1
+        const newValue = typeof value === 'number' ? value.toFixed(2) : value
+        ctx.fillStyle = backgroundColor
+        ctx.fillRect(15, lineHeight * newIndex - 15, 500, lineHeight)
+        ctx.fillStyle = color
+        ctx.fillText(`${key}: ${newValue}`, 15, lineHeight * newIndex)
+      }
+    }
+
+    text()
+  }
+  ctx.restore()
+}

js/variables.js

@@ -0,0 +1,363 @@
+//-------------------------------------------------------------------------
+// 2. GAME CONSTANTS AND VARIABLES
+//-------------------------------------------------------------------------
+
+// ! Globales Test-Objekt
+let globalObject = {
+  lifes: 3,
+  hitpoints: 3,
+  maxHitpoints: 5,
+  collected: null,
+  killed: null,
+  ammo: 10,
+  maxAmmo: 10,
+}
+
+// * Import tiles and level map //
+
+const tileAtlas1 = new Image()
+tileAtlas1.src = './img/tiles.png'
+
+const tileAtlas2 = new Image()
+tileAtlas2.src = './img/Grotto-escape-2-files/PNG/environment-tiles.png'
+
+const tileAtlasBg = new Image()
+tileAtlasBg.src = './img/Grotto-escape-2-files/PNG/environment-background.png'
+
+let tileSize = 16
+let tileOutputSize = 2 // can set to 1 for 32px or higher
+
+const level1Atlas = {
+  tileAtlas: tileAtlas1,
+  offset: 1,
+  tileSize: 16,
+  tileOutputSize: 2,
+  updatedTileSize: tileSize * tileOutputSize,
+  atlasCol: 8,
+  atlasRow: 5,
+  mapIndex: 0,
+  sourceX: 0,
+  sourceY: 0,
+}
+
+const level2Atlas = {
+  tileAtlas: tileAtlas2,
+  offset: 1,
+  tileSize: 16,
+  tileOutputSize: 2,
+  updatedTileSize: tileSize * tileOutputSize,
+  atlasCol: 42,
+  atlasRow: 16,
+  mapIndex: 0,
+  sourceX: 0,
+  sourceY: 0,
+}
+
+const backgroundAtlas = {
+  tileAtlas: tileAtlasBg,
+  offset: 673,
+  tileSize: 16,
+  tileOutputSize: 2,
+  updatedTileSize: tileSize * tileOutputSize,
+  atlasCol: 28,
+  atlasRow: 10,
+  mapIndex: 0,
+  sourceX: 0,
+  sourceY: 0,
+}
+
+// * end of Import tiles and level map //
+
+// * Test Sprite Imports
+
+const playerSpriteAtlas = new Image()
+playerSpriteAtlas.src = './img/player.png'
+
+const playerAtlas = {
+  tileAtlas: playerSpriteAtlas,
+  tileSize: 16,
+  tileOutputSize: 2,
+  updatedTileSize: tileSize * tileOutputSize,
+  atlasCol: 4,
+  atlasRow: 2,
+  mapIndex: 0,
+  sourceX: 0,
+  sourceY: 0,
+}
+
+const enemySpriteAtlas = new Image()
+enemySpriteAtlas.src = './img/enemies.png'
+
+const enemyAtlas = {
+  tileAtlas: enemySpriteAtlas,
+  tileSize: 16,
+  tileOutputSize: 2,
+  updatedTileSize: tileSize * tileOutputSize,
+  atlasCol: 4,
+  atlasRow: 3,
+  mapIndex: 0,
+  sourceX: 0,
+  sourceY: 0,
+}
+
+const itemsSpriteAtlas = new Image()
+itemsSpriteAtlas.src = './img/items.png'
+
+const itemsAtlas = {
+  tileAtlas: itemsSpriteAtlas,
+  tileSize: 16,
+  tileOutputSize: 2,
+  updatedTileSize: tileSize * tileOutputSize,
+  atlasCol: 4,
+  atlasRow: 4,
+  mapIndex: 0,
+  sourceX: 0,
+  sourceY: 0,
+}
+
+const meterSpriteAtlas = new Image()
+meterSpriteAtlas.src = './img/meter.png'
+
+const meterAtlas = {
+  tileAtlas: meterSpriteAtlas,
+  tileSize: 7,
+  tileOutputSize: 2,
+  updatedTileSize: tileSize * tileOutputSize,
+  atlasCol: 4,
+  atlasRow: 6,
+  mapIndex: 0,
+  sourceX: 0,
+  sourceY: 0,
+}
+
+// * End Test Sprite Imports
+
+// * Das currentLevel Objekt sollte durch irgendeine Funktion befüllt werden, wenn ein Level gewechselt wird.
+
+let levelObject = {
+  level1: {
+    scalingFactor: 8,
+    levelData: level1,
+    levelAtlas: level2Atlas,
+    backgroundAtlas: backgroundAtlas,
+    foregroundAtlas: level2Atlas,
+    playerStartCoordinates: { x: 96, y: 480 }, // * Für wenn man das Level durch eine Tür erneut betritt.
+  },
+  level2: {
+    scalingFactor: 4,
+    levelData: level2,
+    levelAtlas: level2Atlas,
+    backgroundAtlas: backgroundAtlas,
+    foregroundAtlas: level2Atlas,
+    playerStartCoordinates: { x: 96, y: 480 }, // * Für wenn man das Level durch eine Tür erneut betritt.
+  },
+  level3: {
+    scalingFactor: 8,
+    levelData: level3,
+    levelAtlas: level2Atlas,
+    backgroundAtlas: backgroundAtlas,
+    foregroundAtlas: level2Atlas,
+    playerStartCoordinates: { x: 96, y: 480 }, // * Für wenn man das Level durch eine Tür erneut betritt.
+  },
+}
+
+let currentLevel = levelObject.level1 // ! hier kann ich noch eine function draus machen, die das currentLevel immer auf dem aktuellen Stand hält. Vorläufig erstmal mit einem Button-Press
+
+let mapWidth = currentLevel.levelData.width
+let mapHeight = currentLevel.levelData.height
+
+let MAP = { tw: mapWidth, th: mapHeight }
+let TILE = 16
+let METER = TILE
+
+let GRAVITY = 60
+
+let MAXDX = 15, // * default max horizontal speed (15 tiles per second)
+  MAXDY = 60, // * default max vertical speed   (60 tiles per second)
+  ACCEL = 1 / 2, // * default take 1/2 second to reach maxdx (horizontal acceleration)
+  FRICTION = 1 / 6, // * default take 1/6 second to stop from maxdx (horizontal friction)
+  IMPULSE = 1500, // * default player jump impulse
+  COLOR = {
+    BLACK: '#000000',
+    YELLOW: '#ECD078',
+    BRICK: '#D95B43',
+    PINK: '#C02942',
+    PURPLE: '#542437',
+    GREY: '#333',
+    SLATE: '#53777A',
+    GOLD: 'gold',
+  },
+  COLORS = [COLOR.YELLOW, COLOR.BRICK, COLOR.PINK, COLOR.PURPLE, COLOR.GREY],
+  KEY = {
+    SPACE: ' ',
+    LEFT: 'ArrowLeft',
+    UP: 'ArrowUp',
+    RIGHT: 'ArrowRight',
+    DOWN: 'ArrowDown',
+    PAUSE: 'p',
+    ENTER: 'Enter',
+    X: 'x',
+    Y: 'y',
+    L: 'l',
+  }
+
+const ammoType = {
+  width: 4,
+  height: 4,
+  distance: 100,
+  velocity: 3,
+}
+
+let fps = 60,
+  step = 1 / fps,
+  canvas = document.getElementById('canvas'),
+  ctx = canvas.getContext('2d'),
+  player = {},
+  monsters = [],
+  pickups = [],
+  treasure = [],
+  doors = [], // ! Hier sammel ich alle Door Objekte.
+  liquids = [], // ! Alle Bereich, die mit Wasser gefüllt sind.
+  bullets = [],
+  cells = [], // ! vielleicht kann ich hieraus aber auch einfach ein Objekt machen, das Arrays für collCells, bgCells und fgCells beinhaltet
+  bgCells = [], // * Die sind für die background cells.
+  fgCells = [], // * Die sind für die foreground cells.
+  lqCells = [],
+  paused = false,
+  showDevInfo = false
+
+canvas.width = mapWidth * TILE
+canvas.height = mapHeight * TILE
+
+let width = (canvas.width = mapWidth * TILE) // * Das ist clever, weil ich so der Canvas immer von der Map Size abhängig ist. Zusammen mit ctx.scale und ctx.translate bekomme ich so auch eine Camera hin!
+let height = (canvas.height = mapHeight * TILE)
+
+let scalingFactor = currentLevel.scalingFactor // * 8 fühlt sich ungefähr nach 8bit Grafik an.
+
+let scaledCanvas = {
+  width: canvas.width / scalingFactor,
+  height: canvas.height / scalingFactor,
+}
+
+let t2p = function (t) {
+    return t * TILE
+  },
+  p2t = function (p) {
+    return Math.floor(p / TILE)
+  },
+  cell = function (x, y) {
+    return tcell(p2t(x), p2t(y), mapWidth)
+  },
+  tcell = function (tx, ty, mapWidth) {
+    // ! Hier brauche ich entweder eine allgemeinere Funktion oder noch weiter für bgCells ud fgCells.
+    return cells[tx + ty * mapWidth]
+  },
+  bgTcell = function (tx, ty, mapWidth) {
+    return bgCells[tx + ty * mapWidth]
+  },
+  fgTcell = function (tx, ty, mapWidth) {
+    return fgCells[tx + ty * mapWidth]
+  },
+  lqTcell = function (tx, ty, mapWidth) {
+    return !!lqCells && lqCells[tx + ty * mapWidth]
+  }
+
+// * Init Level Funtion
+function _initLevel(newLevel) {
+  monsters = []
+  treasure = []
+  pickups = []
+  doors = []
+  liquids = []
+  cells = []
+  currentLevel = newLevel
+  player.collected = 0
+
+  mapWidth = currentLevel.levelData.width
+  mapHeight = currentLevel.levelData.height
+
+  canvas.width = mapWidth * TILE
+  canvas.height = mapHeight * TILE
+
+  scalingFactor = currentLevel.scalingFactor
+
+  scaledCanvas = {
+    width: canvas.width / scalingFactor,
+    height: canvas.height / scalingFactor,
+  }
+
+  setup(newLevel.levelData)
+}
+
+// * Const Sfx from audio files //
+// ! Achtung: utils müssen in index.html vor den variables geladen werden.
+
+let sfxVolume = 0.2
+let musicVolume = 0.5
+
+let sfx = {
+  jump: new sound('./audio/Jump.wav', sfxVolume),
+  pickup: new sound('./audio/Pickup_Coin.wav', sfxVolume),
+  lowHealth: new sound('./audio/LA_LowHealth.wav', sfxVolume),
+  die: new sound('./audio/Explosion.wav', sfxVolume),
+  takeDamage: new sound('./audio/Randomize3.wav', sfxVolume),
+  killMonster: new sound('./audio/Randomize.wav', sfxVolume),
+  powerup: new sound('./audio/Powerup.wav', sfxVolume),
+  openDoor: new sound('./audio/LA_Chest_Open.wav', sfxVolume),
+  shoot: new sound('./audio/Laser2.wav', sfxVolume),
+  explode: new sound('./audio/Explosion.wav', sfxVolume),
+  splash: new sound('./audio/Oracle_Rock_Shatter.wav', sfxVolume),
+  swim: new sound('./audio/SML2_Swim.ogg', sfxVolume),
+  click: new sound('./audio/click.wav', sfxVolume),
+
+  stomp: new sound('./audio/smb_stomp.wav', sfxVolume),
+  kick: new sound('./audio/smb_kick.wav', sfxVolume),
+  extraLife: new sound('./audio/smb_1-up.wav', sfxVolume),
+  smb_powerup: new sound('./audio/smb_powerup.wav', sfxVolume),
+}
+
+let theme = {
+  level1: new music('./audio/music/8BitCave.wav', musicVolume),
+}
+
+let globalPlayer = {
+  collected: 0,
+  killed: 0,
+  maxHitpoints: 5,
+  currentHitpoints: 3,
+  vul: true,
+  hurt: false,
+  interact: false,
+  shooting: false,
+  swimming: false,
+  sprites: {
+    idle: {
+      tiles: [5],
+      framerate: 5,
+      framebuffer: 8,
+      loop: true,
+      currentFrame: 0,
+    },
+    run: {
+      tiles: [0, 1, 2, 1],
+      framerate: 5,
+      framebuffer: 10,
+      loop: true,
+      currentFrame: 0,
+    },
+    jump: {
+      tiles: [4],
+      framerate: 5,
+      framebuffer: 8,
+      loop: true,
+      currentFrame: 0,
+    },
+    shoot: {
+      tiles: [3],
+      framerate: 5,
+      framebuffer: 8,
+      loop: true,
+      currentFrame: 0,
+    },
+  },
+}