Metroidvania风格小游戏

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html

css

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html

css

:root {
  --tile-line-height: 30px;
  --tile-size: 10px;
  --clr: gray;
  --pl-clr: 
    radial-gradient(circle at 75% 50%, white 1px, transparent 2px),
    radial-gradient(circle at 25% 50%, white 1px, transparent 2px),
    radial-gradient(circle at 75% 40%, black 3px, transparent 4px),
    radial-gradient(circle at 25% 40%, black 3px, transparent 4px),
    white;
}
html,
body {
  min-width: 100vw;
  min-height: 100vh;
  overflow: hidden;
  margin: 0;
  display: grid;
  place-items: center;
  background: #111;  
}

#game_console {
  width: 100%;
  max-width: 1000px;
  aspect-ratio: 16 / 9;
  position: relative;
  background: #200;  
  text-align: center;
  line-height: var(--tile-line-height);
  font-size: 0;
  color: transparent;
  user-select: none;
  box-shadow: 0 20px 20px black;
}

#game_alert {
  padding: 1rem 2rem;
  font-size: 16px; 
  font-family: system-ui, serif;
  color: white;
  background: rgba(0,0,0,.75);
/*   box-sizing: border-box; */
  border: 1px dashed white;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 99999;
  border-radius: 50px;
  transition: .5s;
  opacity: 0;
  pointer-events: none;
  user-select: none;
}

h2 {
  margin: 0;
  margin-bottom: 10px;
}

.tile {
  /*   outline: 1px dotted dimgray; */
}

.ground {
  background: dimgray;
  box-shadow: 
    inset 2px 2px 0 2px rgba(0,0,0,.25),
    inset -2px -2px 0 2px rgba(0,0,0,.5);
}

.door {
  box-shadow: none !important;
}

.cube {
  background: var(--clr);
  box-sizing: border-box;
  border-top: 5px solid rgba(0,0,0,.25);
  border-right: 5px solid rgba(0,0,0,.65);
  border-bottom: 5px solid rgba(0,0,0,.65);
  border-left: 5px solid rgba(0,0,0,.25);
}

.stripes {
  background:
    linear-gradient(to right, transparent 3px, rgba(0,0,0,.25) 2px),
    var(--clr);
  background-size: 6px 11px;
  background-repeat: repeat-x;
  background-position: 3px 5px;
}

.lava {
  background: 
    linear-gradient(to top, orangered, gold 90%, transparent 90%);
  background-size: 100% 200%;
  background-position: 0 0;
}

.key,
.finalgoal {
  box-sizing: border-box;
  border-top: 5px solid rgba(0,0,0,.25);
  border-right: 5px solid rgba(0,0,0,.65);
  border-bottom: 5px solid rgba(0,0,0,.65);
  border-left: 5px solid rgba(0,0,0,.25);
}

.highjump {
  clip-path: polygon(40% 100%, 60% 100%, 100% 0%, 0% 0%);
  background: linear-gradient(to bottom, aqua 3px, transparent 3px);
  background-size: 100% 6px;
}

#player,
#player:after {
  content:'';
  width: var(--tile-line-height);
  height: var(--tile-line-height);
  background: transparent;
  position: absolute;
  /*   left: calc(var(--tile-line-height)*27);
  top: calc(var(--tile-line-height)*13); */
  z-index: 10000;
  pointer-events: none;
}

#player:after {
  background: var(--pl-clr);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10000;
  border-radius: 5px;
  clip-path: polygon(0% 0%, 100% 0%, 100% 80%, 90% 80%, 90% 100%, 80% 100%, 80% 80%, 20% 80%, 20% 100%, 10% 100%, 10% 80%, 0% 80%);
  pointer-events: none;
  transform-origin: 50% 100%;

}

.goleft:after {
  transform: skewX(10deg);
  animation: moving .25s linear infinite;
}
.goright:after {
  transform: skewX(-10deg);  
  animation: moving .25s linear infinite;
}
@keyframes moving {
  50% {
    clip-path: polygon(0% 0%, 100% 0%, 100% 80%, 80% 80%, 80% 100%, 70% 100%, 70% 80%, 30% 80%, 30% 100%, 20% 100%, 20% 80%, 0% 80%)
  }
}

#level_mask {
  width: 200vw;
  height: 200vw;
  background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0), black 12.5%);
  position: absolute;
  left: 0;
  top: 0;
  transform: translate(-50%,-50%);
  opacity: 1;
}

.rocket {
  /*   opacity: 0; */
}

#big_rocket {
  width: 40px;
  height: 125px;
  background:
    linear-gradient(to right, transparent 45%, firebrick 45%, firebrick 55%, transparent 55%),
    radial-gradient(circle at 50% 40%, rgba(255,255,255,1) 10%, #aaa 11%, #aaa 15%, transparent 16%),
    linear-gradient(to right, transparent 50%, rgba(0,0,0,.1) 50%),    
    linear-gradient(to bottom, firebrick 12%, transparent 12%),
    lightgray;
  background-size: 100% 40%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%;
  background-position: 50% 95%, 0 0, 0 0, 0 0, 0 0;
  background-repeat: no-repeat;
  border-radius: 50px 50px 50px 50px / 200px 200px 10px 10px;
  position: absolute;
  left: 54.25%;
  top: 0;
  box-shadow: 0 15px 0 -5px gray; 
}
#big_rocket:before {
  content:'';
  width: 200%;
  height: 50%;
  position: absolute;
  top: 55%;
  left: -50%;
  background: 
    radial-gradient(circle at 50% 100%, transparent 50%, firebrick 51%);
  clip-path: polygon(0% 0%, 25% 0%, 25% 100%, 75% 100%, 75% 0%, 100% 0%, 100% 100%, 0% 100%);
  border-radius: 100% 100% 0 0;
}
#big_rocket:after {
  content:'';
  width: 60%;
  height: 25%;
  position: absolute;
  top: 108%;
  left: 20%;
  background:
    linear-gradient(to bottom, orangered, gold);
  border-radius: 0 0 25% 25%;
  filter: blur(2px);
  opacity: .75;
  animation: blast_off .75s linear infinite;
}
@keyframes blast_off {
  33% { 
    background:
      linear-gradient(to bottom, orangered 25%, gold 75%);
  }
  66% { 
    background:
      linear-gradient(to bottom, orangered 50%, gold 90%);
  }
}

.adios {
  animation: adios 2s ease-in forwards;
}
@keyframes adios {
  100% {
    transform: translateY(-200%);
    opacity: 0;
  }
}

JavaScript

const gc = document.querySelector('#game_console')
const ga = document.querySelector('#game_alert')
const gc_loc = gc.getBoundingClientRect()
const pl = document.querySelector('#player')
var cols = 48 // multiple of 16
var rows = 27 // multiple of 9
const tile_size = gc_loc.width*(100/cols/100)
document.body.style.setProperty('--tile-line-height', tile_size+'px')

pl.style.top = (tile_size*13) + 'px'
pl.style.left = (tile_size*27) + 'px'
var pl_loc = pl.getBoundingClientRect() 
gc.style.width = '1000px'
gc.style.height = tile_size*rows+'px'

var gravity = 8,
    kd,
    x = pl_loc.left,
    x_speed = 5,
    pb_y = 0,
    score = 0,
    rot = 0,
    data_p = 0,
    bonus = 1,
    dead = false,
    kd_list = [],
    d = {},
    highjump = false,
    timer = 0;

const level = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
               0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,8,8,0,1,1,1,1,1,1,1,0,0,0,0,1,1,1,1,1,1,1,0,
               0,1,'B',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,8,8,8,1,9,1,1,1,1,1,1,0,0,0,1,1,1,1,1,1,1,0,
               0,1,0,1,1,1,1,0,0,0,1,1,0,0,0,1,1,0,0,0,0,0,1,1,1,0,8,8,0,0,0,1,1,1,1,1,1,1,0,0,1,1,1,0,0,1,1,0,
               0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,8,8,0,0,0,1,1,1,1,1,1,1,1,0,0,1,1,0,1,1,1,0,
               0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,8,8,0,0,0,1,1,1,1,1,1,1,1,0,1,1,1,0,1,1,1,0,
               0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,8,8,0,0,0,1,1,1,1,1,1,1,1,0,1,1,0,0,1,1,0,0,
               0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1,0,8,8,0,0,0,0,0,0,1,1,1,1,1,0,1,1,1,0,1,1,1,0,
               0,1,1,1,0,2,2,0,0,0,2,2,0,0,0,2,2,0,0,2,2,0,1,1,1,0,8,8,0,0,0,1,1,1,1,1,0,0,0,0,0,1,1,0,1,1,1,0,
               0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,1,1,0,0,1,1,0,
               0,'BD','BD',0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,0,0,1,0,1,1,1,0,
               0,1,1,1,0,1,'G',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,0,
               0,0,1,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1,0,2,2,0,1,1,1,1,1,1,0,'PD','PD',0,0,
               0,1,1,1,0,0,0,0,0,2,2,0,2,2,0,2,2,0,0,0,0,0,0,0,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,
               0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,1,1,1,1,1,1,1,'GD',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,
               0,1,1,1,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,'GD',1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,
               0,1,1,1,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,'BD',0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,1,1,0,
               0,0,1,1,0,0,0,1,1,1,1,0,0,0,0,0,0,1,1,1,1,1,1,0,1,1,0,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,
               0,1,1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,'P',1,0,1,1,0,1,1,1,1,'H',1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,0,
               0,1,1,1,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1,0,0,1,1,1,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,0,
               0,1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,1,1,1,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,
               0,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,0,1,1,0,0,1,1,1,1,1,0,0,1,1,1,1,1,1,1,1,1,1,1,0,0,
               0,0,1,1,1,1,1,1,1,0,1,1,1,0,0,0,1,1,1,1,1,1,1,0,0,1,0,1,1,1,1,1,1,0,0,0,1,1,1,1,1,1,1,1,1,1,1,0,
               0,0,0,1,1,1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,1,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,0,
               0,0,0,1,0,1,1,0,2,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,
               0,0,0,2,0,0,2,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,2,2,0,2,0,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,
               0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

function buildGame(){
  for(var i=0;i<cols*rows;i++) {
    var d = document.createElement('div')
    d.className = 'tile'
    if(level[i] == 0) {
      // d.className = Math.random() > .2 ? 'tile ground cube' : 'tile ground stripes'   
      d.className = 'tile ground' 
      // d.style.background = 'dimgray'
    }
    if(level[i] == 2) {
      d.className = 'tile lava'      
    }
    if(level[i] == 8) {
      // d.className = Math.random() > .2 ? 'tile rocket cube' : 'tile rocket stripes'
      d.className = 'tile rocket'
      d.style.background = 'dimgray'
    }
    if(level[i] == 9) {
      d.className = 'tile finalgoal'
      d.style.background = 'goldenrod'
      d.style.borderRadius = '50%'
    }
    if(level[i] == 'B') {
      d.className = 'tile key blue'
      d.style.background = 'dodgerblue'
      d.style.borderRadius = '50%'      
    }
    if(level[i] == 'BD') {
      d.className = 'tile door ground blue'
      d.style.background = 'linear-gradient(to bottom, transparent 20%, dodgerblue 20%, dodgerblue 40%, transparent 40%, transparent 60%, dodgerblue 60%, dodgerblue 80%, transparent 80%'      
    }
    if(level[i] == 'G') {
      d.className = 'tile key green'
      d.style.background = 'limegreen'
      d.style.borderRadius = '50%'      
    }
    if(level[i] == 'GD') {
      d.className = 'tile door ground green'
      d.style.background = 'linear-gradient(to right, transparent 20%, limegreen 20%, limegreen 40%, transparent 40%, transparent 60%, limegreen 60%, limegreen 80%, transparent 80%'      
    }
    if(level[i] == 'P') {
      d.className = 'tile key purple'
      d.style.background = 'MediumOrchid'
      d.style.borderRadius = '50%'      
    }
    if(level[i] == 'PD') {
      d.className = 'tile door ground purple'
      d.style.background = 'linear-gradient(to bottom, transparent 20%, MediumOrchid 20%, MediumOrchid 40%, transparent 40%, transparent 60%, MediumOrchid 60%, MediumOrchid 80%, transparent 80%'      
    }
    if(level[i] == 'H') {
      d.className = 'tile highjump'
      // d.style.background = 'goldenrod'
    }
    d.setAttribute('grid_loc', [i % cols,Math.floor(i/cols)])
    d.style.width = tile_size + 'px'
    d.style.height = tile_size + 'px'
    d.style.position = 'absolute'
    // d.innerHTML = i
    // d.style.outline = '1px dotted gray'
    d.style.left = (i % cols)*tile_size + 'px'
    d.style.top = Math.floor(i/cols)*tile_size + 'px'

gc.appendChild(d)
  }

}

buildGame()

function updatePlayer() {
  var pl_loc = pl.getBoundingClientRect()  
  var pl_center = document.elementFromPoint(pl_loc.x + (tile_size*.5), pl_loc.y + (tile_size*.5))
  var pl_xy1 = document.elementFromPoint(pl_loc.x + (pl_loc.width*.25), pl_loc.y + pl_loc.height + (gravity*.5))
  var pl_xy2 = document.elementFromPoint(pl_loc.x + (pl_loc.width*.75), pl_loc.y + pl_loc.height + (gravity*.5))
  var pl_xy3 = document.elementFromPoint(pl_loc.x - (x_speed*.5), pl_loc.y + (pl_loc.height*.5))
  var pl_xy4 = document.elementFromPoint(pl_loc.x + pl_loc.width + (x_speed*.5), pl_loc.y + (pl_loc.height*.5))
  var pl_xy5 = document.elementFromPoint(pl_loc.x + (pl_loc.width*.5), pl_loc.y - (gravity*.5))
  // var pl_xy6 = document.elementFromPoint(pl_loc.x + (pl_loc.width*.5), pl_loc.y + pl_loc.height)

// console.log(pl_center)

function endGame() {
    alert('you died')
  }

//if dead stop, else update player and everything else
  if(!pl_xy1 || !pl_xy2 || dead) {
    endGame()
  } else {

// set player top   
    // if player on ground set new top
    if((pl_xy1.classList.contains('ground') ||
        pl_xy2.classList.contains('ground'))) {
      gravity = 0
    } else {
      if(gravity < 8) {
        gravity += .51
      } else {
        gravity = 8
      }      
    }
    pl.style.top = pl_loc.top - gc_loc.top + gravity + 'px'
    // console.log(gravity)

// add jump-force
    if(d[38] && gravity == 0) {
      gravity = -8
      if(highjump) {
        gravity = -9
      }
    } 
    if(pl_xy5.classList.contains('ground')) {
      gravity = 5
    }
    pl.style.top = pl_loc.top - gc_loc.top + gravity + 'px'
    // track left/right movement
    if(d[37] && x > gc_loc.x) {
      if(!pl_xy3.classList.contains('ground')) {
        x -= x_speed
        pl.className = ''
        pl.classList.add('goleft')
      } else {
        pl.className = ''
      }
    }
    if(d[39] && x + pl_loc.width < gc_loc.x + gc_loc.width) {
      if(!pl_xy4.classList.contains('ground')) {
        x += x_speed
        pl.className = ''
        pl.classList.add('goright')
      } else {
        pl.className = ''
      }
    }  
    pl.style.left = x - gc_loc.left + 'px'

if(pl_center.classList.contains('lava')) {
      // console.log('lava')
      pl.style.top = (tile_size*13) + 'px'
      pl.style.left = (tile_size*27) + 'px'
      pl_loc = pl.getBoundingClientRect()
      x = pl_loc.left
    }
    if(pl_center.classList.contains('highjump')) {
      // console.log('lava')
      highjump = true
      pl_center.style.display = 'none'
      ga.innerHTML = 'You got high jump!'
      ga.style.opacity = '1'
      setTimeout(function(){
        ga.style.opacity = '0'
      },4000)      
    }
    if(pl_center.classList.contains('key')) {
      pl_center.style.display = 'none'      
      var clr = pl_center.classList[2]
      ga.innerHTML = 'You got the '+clr+' key!'
      ga.style.opacity = '1'
      setTimeout(function(){
        ga.style.opacity = '0'
      },4000)
      var doors = document.querySelectorAll('.door')
      doors.forEach(function(elm){
        if(elm.classList[3] == clr) {
          elm.classList.remove('ground')          
        }
      })            
    }
    if(pl_center.classList.contains('door')) {
      pl_center.style.display = 'none'
    }
    if(pl_center.classList.contains('finalgoal')) {
      pl_center.style.display = 'none'
      var clr = pl_center.style.background
      var doors = document.querySelectorAll('.rocket')
      doors.forEach(function(elm){
        elm.style.display = 'none'
      })

setTimeout(function(){
        pl.style.opacity = '0'
        document.body.style.setProperty('--pl-clr', 'transparent')
        document.querySelector('#big_rocket').classList.add('adios')
        setTimeout(function(){
          var time = (timer/30)
          ga.innerHTML = '<h2>YOU WIN!</h2>'+time.toFixed(2)+' seconds'
          ga.style.opacity = '1'
          // setTimeout(function(){
          //   ga.style.opacity = '0'
          // },4000)          
        }, 2250)
      }, 250)      
    }

timer++
    setTimeout(updatePlayer, 1000/30)
  }  
}

updatePlayer()

window.focus()

ga.innerHTML = '小键盘箭头键移动和跳跃'
ga.style.opacity = '1'
setTimeout(function(){
  ga.style.opacity = '0'
},4000)

window.addEventListener('keydown', function(e) { d[e.which] = true; })
window.addEventListener('keyup', function(e) {   
  d[e.which] = false; 
  pl.className = ''
})

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