飞行游戏

下载代码

html

css

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html

css

body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  color: white;
  font-family: Courier New, Courier, monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
}

.GUI {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
}

.score {
  position: absolute;
  top: 60px;
  left: 30px;
  font-size: 2rem;
}

.instructions {
  position: absolute;
  top: 30px;
  left: 30px;
}

.overlay-wrapper {
  visibility: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.overlay {
  display: flex;
  flex-direction: column;
  padding: 40px;
  background-color: rgba(0, 0, 0, .3);
  border: 3px solid rgba(0, 0, 0, .2);
  text-align: center;
}

.overlay-title {
  margin: 0;
  position: relative;
  text-transform: uppercase;
  font-size: 4rem;
  line-height: 1;
  font-weight: 300;
  mix-blend-mode: screen;

&::before {
    content: "Game Over";
    position: absolute;
    font-weight: 700;
    background-image: linear-gradient(to bottom, #00ffff 0%, #ff00ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: blur(3px);
    z-index: -1;
    text-shadow: none;
  }
}

.overlay-score {
  margin: 30px 0;
  font-size: 1.6rem;
  text-shadow: 0 0 12px rgba(0, 255, 255, .8);
}

.overlay-button {
  margin: 0 auto;
  padding: 15px 30px;
  border: 3px solid white;
  position: relative;
  text-shadow: 0 0 12px rgba(0, 255, 255, .8);
  appearance: none;
  cursor: pointer;
  outline: none;
  background-color: transparent;
  color: white;
  font-family: Courier New, Courier, monospace;
  font-size: 1.6rem;

&::before {
    content: "";
    display: block;
    width: calc(100% + 6px);
    height: calc(100% + 6px);
    border: 3px solid white;
    border-image: linear-gradient(to bottom, #00ffff 0%, #ff00ff 100%) 10;
    position: absolute;
    top: -3px;
    left: -3px;
    z-index: -1;
    transition-duration: 200ms;
    transition-property: filter, border-width, top, left, width, height;
  }
}

.overlay-button:hover::before {
  border-width: 9px;
  filter: blur(2px);
  top: -6px;
  left: -6px;
  width: calc(100% + 12px);
  height: calc(100% + 12px);
}

JavaScript

const spaceshipModel = {
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}

const RGB = {
  fragPars: '#define RGB( r, g, b ) vec3( float( r ) / 255.0, float( g ) / 255.0, float( b ) / 255.0 )',
};

const spaceshipShader = {
  vertexShader: `
    varying vec2 vUv;
    varying vec3 vPosition;

void main() {
      vUv = uv;
      vPosition = position;
      gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
    }
  `,
  fragmentShader: `
    precision mediump float;

${RGB.fragPars}

varying vec2 vUv;
    varying vec3 vPosition;

void main() {
      vec4 color1 = vec4(RGB(255, 0, 255), 0.0);
      vec4 color2 = vec4(RGB(0, 255, 255), 0.0);
      // if (vUv.y > .7) {
      //   color = vec4(RGB(0, 255, 255), 0.0);
      // }
      gl_FragColor = mix(color1, color2, vPosition.y / 10. + .5);
    }
  `,
  wireframe: true,
};

const treeShader = {
  uniforms: THREE.UniformsLib.fog,
  vertexShader: `
    uniform vec3 mvPosition;
    varying vec2 vUv;

varying float fogDepth;

void main() {
      fogDepth = -mvPosition.z;
      vUv = uv;
      gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
    }
  `,
  fragmentShader: `
    precision mediump float;

${THREE.ShaderChunk.fog_pars_fragment}

varying vec2 vUv;

void main() {
      vec4 color = vec4(.0, 1. - (vUv.y * 1.6), 1. - (vUv.y * .8), 1.); // 1. - vUv.y * 2.
      gl_FragColor = color;
      
      #ifdef USE_FOG
        #ifdef USE_LOGDEPTHBUF_EXT
          float depth = gl_FragDepthEXT / gl_FragCoord.w;
        #else
          float depth = gl_FragCoord.z / gl_FragCoord.w;
        #endif
        float fogFactor = smoothstep(fogNear, fogFar, depth);
        gl_FragColor.a = gl_FragColor.a * (1. - fogFactor);
      #endif
    }
  `,
  fog: true,
  transparent: true,
};

const backgroundShader = {
  uniforms: {},
  vertexShader: `
    attribute vec3 position;

uniform mat4 modelViewMatrix;
    uniform mat4 projectionMatrix;

varying vec2 vUv;
    
    void main() {
      gl_Position = vec4(position, 1.0);
      vUv = vec2(position.x, position.y) * 0.5 + 0.5;
    }
  `,
  fragmentShader: `
    precision mediump float;

${RGB.fragPars}

varying vec2 vUv;

float lmap(in float val, in float inMin, in float inMax, in float outMin, in float outMax) {
      return clamp(outMin + ((outMax - outMin) * (val - inMin)) / (inMax - inMin), outMin, outMax);
    }

// gradient with multiple colors in non-equal intervals
    vec3 getColor(in float perc) {
      vec3 uColors[4];
      float uStops[4];
      const int uNumColors = 4;

uStops[0] = 0.0;
      uStops[1] = 0.28;
      uStops[2] = 0.58;
      uStops[3] = 1.0;

uColors[0] = RGB(255, 146, 48);
      uColors[1] = RGB(202, 84, 194);
      uColors[2] = RGB(36, 16, 142);
      uColors[3] = RGB(2, 0, 36);

for (int i = 1; i < uNumColors; i ++) {
          if (perc < uStops[i]) {
              float stopPct = lmap(perc, uStops[i-1], uStops[i], 0.0, 1.0);
              return mix(uColors[i-1], uColors[i], stopPct);
          }
      }
      // edge case, in case the last stop is not at 1.0
      return uColors[uNumColors - 1];
    }

float blendColorDodge(float base, float blend) {
      return (blend==1.0)?blend:min(base/(1.0-blend),1.0);
    }

vec3 blendColorDodge(vec3 base, vec3 blend) {
      return vec3(blendColorDodge(base.r,blend.r), blendColorDodge(base.g,blend.g), blendColorDodge(base.b,blend.b));
    }

vec3 blendColorDodge(vec3 base, vec3 blend, float opacity) {
      return blendColorDodge(base, blend) * opacity + base * (1.0 - opacity);
    }

vec3 radialGradient(vec2 center, float radius) {
      float distance = length( center - vUv.xy );

float maxDistance = radius;//pow( radius, 0.23);
      float quadDistance = distance;//pow( distance, 0.23);

float quadIntensity = 1.0 - min( quadDistance, maxDistance )/maxDistance;

return vec3(quadIntensity);
    }

void main() {

float y = vUv.y * 1.1 - .25;
      vec3 color = RGB(140, 0, 255) * y; // vec3(0.0, y, y); //vec3(0.0, y, y);

if (vUv.y > .5) {
        vec3 sunset = getColor((vUv.y - .5) * 2.);
        vec3 light = radialGradient(vec2(.5,.2), .8);
        color = blendColorDodge(sunset, light);
      }

gl_FragColor = vec4(color, 1.0);
    }
  `,
  side: THREE.DoubleSide,
  depthTest: false,
};

const keys = {
  W: 1 << 0,
  A: 1 << 1,
  S: 1 << 2,
  D: 1 << 3,
  SPACE: 1 << 4,
  ENTER: 1 << 5,
  ESC: 1 << 6,
  SHIFT: 1 << 7,
  CTRL: 1 << 8,
  LEFT: 1 << 9,
  UP: 1 << 10,
  RIGHT: 1 << 11,
  DOWN: 1 << 12,
};

const keyCodes = {
  87: keys.W,
  65: keys.A,
  83: keys.S,
  68: keys.D,
  32: keys.SPACE,
  13: keys.ENTER,
  27: keys.ESC,
  16: keys.SHIFT,
  17: keys.CTRL,
  37: keys.LEFT,
  38: keys.UP,
  39: keys.RIGHT,
  40: keys.DOWN,
};

let keysPressed = 0;

const isKeyDown = keyFlag => Boolean(keysPressed & keyFlag);

const onKeyDown = ({ keyCode }) => {
  const keyFlag = keyCodes[keyCode];
  keysPressed |= keyFlag;
};

const onKeyUp = ({ keyCode }) => {
  keysPressed &= ~keyCodes[keyCode];
};

window.addEventListener('keyup', onKeyUp);
window.addEventListener('keydown', onKeyDown);

const addUniformsToShader = (shader, uniforms) => ({ ...shader, uniforms: { ...shader.uniforms, ...uniforms } });

const random = (min, max, round = false) => {
  const num = (Math.random() * (max - min)) + min;
  return round ? Math.floor(num + 1) : num;
}

let scene, camera, renderer;
let playerGeometry, playerMaterial, player;
let backgroundGeometry, backgroundMaterial, background;

let time = performance.now();
let timePlaying = 0;

const trees = [];
const treeCount = 500;
const treeHeight = 100;
let treePlaceInterval;
let treePlaceLastTime = time;

let score = 0;
const scoreIncrease = 10;
const scoreUpdateInterval = 500;
let scoreUpdateLastTime = time;
const scoreNodes = document.querySelectorAll('.js-score');

let speed = 600;
const speedIncrease = 3;
let playerSpeed = 0;
const playerAcceleration = 70;
const playerMaxSpeed = 700;

const gameStates = {
  PLAYING: 1,
  GAME_OVER: 2,
};
let gameState = gameStates.PLAYING;

loadAssets();

function init() {
  scene = new THREE.Scene();
  scene.fog = new THREE.Fog(0xFF00FF, 1100, 2000);

camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 10000);
  camera.position.set(0, 50, 0);

renderer = new THREE.WebGLRenderer({ antialias: true });
  renderer.setSize(window.innerWidth, window.innerHeight);

document.body.appendChild(renderer.domElement);

window.addEventListener('resize', resize);
  attachDOMListeners();

createObjects();

requestAnimationFrame(update);
}

function loadAssets() {
  const loader = new THREE.JSONLoader();
  playerGeometry = loader.parse(spaceshipModel).geometry;
  init();
}

function reset() {
  hideGameOver();

while (scene.children.length) {
    scene.remove(scene.children[0]);
  }
  trees.length = 0;
  score = 0;

createObjects();

time = performance.now();
  timePlaying = 0;
  gameState = gameStates.PLAYING;
}

function createObjects() {
  backgroundGeometry = new THREE.PlaneGeometry(2, 2, 1);
  backgroundMaterial = new THREE.RawShaderMaterial(backgroundShader);
  background = new THREE.Mesh(backgroundGeometry, backgroundMaterial);
  background.frustumCulled = false;
  scene.add(background);

playerMaterial = new THREE.ShaderMaterial(spaceshipShader);
  player = new THREE.Mesh(playerGeometry, playerMaterial);
  player.position.set(0, 20, -45);
  scene.add(player);

createTrees();
}

for (let i = 0; i < treeCount; i++) {
    const mesh = new THREE.Mesh(geometry, material);
    const scale = random(1, 2);
    mesh.scale.set(1, scale, 1);
    mesh.rotateY(Math.PI * random(0, 0.5));
    mesh.inUse = false;
    mesh.visible = false;
    trees.push(mesh);
    scene.add(mesh);
  }
}

function getTree() {
  let tree;
  let i = 0;

do {
    tree = trees[i];
    i++;
  } while (tree.inUse === true && i < treeCount);

return tree;
}

function placeTree() {
  const tree = getTree();
  const offsetY = (treeHeight * tree.scale.y) / 2;
  tree.inUse = true;
  tree.visible = true;
  tree.position.set(random(camera.position.x - 2500, camera.position.x + 2500), offsetY, -2000);
}

function removeTree(i) {
  trees[i].inUse = false;
  trees[i].visible = false;
}

function updateTrees(delta) {
  for (let i = 0; i < trees.length; i++) {
    if (!trees[i].inUse === true) continue;
    trees[i].position.z += speed * delta;
    checkCollision(trees[i].position.x, trees[i].position.z);

if (trees[i].position.z > 10) {
      removeTree(i);
    }
  }

if (time - treePlaceLastTime >= treePlaceInterval) {
    placeTree();
    treePlaceLastTime = time;
  }
}

function updatePlayer(delta) {
  let targetSpeed = 0;

if (isKeyDown(keys.A) || isKeyDown(keys.LEFT)) {
    targetSpeed = -playerMaxSpeed;
  } else if (isKeyDown(keys.D) || isKeyDown(keys.RIGHT)) {
    targetSpeed = playerMaxSpeed;
  }

if (playerSpeed < targetSpeed) {
    playerSpeed += playerAcceleration;
  } else if (playerSpeed > targetSpeed) {
    playerSpeed -= playerAcceleration;
  }

player.position.x += playerSpeed * delta;
  player.rotation.z = -playerSpeed * 0.0006;
  camera.position.x = player.position.x;
  camera.updateProjectionMatrix();
}

function checkCollision(x, z) {
  if (Math.abs(player.position.z - z) < 20 && Math.abs(player.position.x - x) < 25) {
    gameState = gameStates.GAME_OVER;
    showGameOver();
  }
}

function attachDOMListeners() {
  const nodes = document.querySelectorAll('.js-play');
  Array.prototype.forEach.call(nodes, node => node.addEventListener('click', reset));
}

function updateScore() {
  if (time - scoreUpdateLastTime >= scoreUpdateInterval) {
    score += scoreIncrease;
    scoreUpdateLastTime = time;
  }

Array.prototype.forEach.call(scoreNodes, node => node.innerHTML = score);
}

function showGameOver() {
  document.getElementById('gameover').style.visibility = 'visible';
}

function hideGameOver() {
  document.getElementById('gameover').style.visibility = 'hidden';
}

function resize() {
  camera.aspect = window.innerWidth / window.innerHeight;
  camera.updateProjectionMatrix();
  renderer.setSize(window.innerWidth, window.innerHeight);
}

function update(newTime) {
  requestAnimationFrame(update);

const delta = (newTime - time) / 1000;
  time = newTime;

if (delta > 0.5) return;

renderer.render(scene, camera);

if (gameState !== gameStates.PLAYING) return;

timePlaying += delta;
  speed += speedIncrease * delta;
  treePlaceInterval = (1 / speed) * 40 * 1000;

updateTrees(delta);
  updatePlayer(delta);
  updateScore();
}

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