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<!DOCTYPE html> |
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<html> |
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<head> |
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<title>Finite State Machine Demo with 3D Bird Swarm</title> |
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<script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script> |
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</head> |
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<body> |
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<a-scene> |
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<a-assets> |
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<img id="groundTexture" src="https://cdn.aframe.io/a-painter/images/floor.jpg"> |
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<img id="skyTexture" src="https://cdn.aframe.io/a-painter/images/sky.jpg"> |
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</a-assets> |
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<a-sky src="#skyTexture"></a-sky> |
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<a-plane src="#groundTexture" rotation="-90 0 0" height="100" width="100"></a-plane> |
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<a-entity id="player" position="0 1.5 -5" movement></a-entity> |
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<a-entity id="bird-swarm"> |
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<a-sphere color="#F44336" position="0 1.5 -10" radius="0.5"></a-sphere> |
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<a-sphere color="#E91E63" position="0 1.5 -11" radius="0.5"></a-sphere> |
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<a-sphere color="#9C27B0" position="0 1.5 -12" radius="0.5"></a-sphere> |
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<a-sphere color="#2196F3" position="0 1.5 -13" radius="0.5"></a-sphere> |
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<a-sphere color="#4CAF50" position="0 1.5 -14" radius="0.5"></a-sphere> |
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</a-entity> |
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</a-scene> |
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<script src="https://cdnjs.cloudflare.com/ajax/libs/javascript-state-machine/3.0.0/state-machine.min.js"></script> |
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<script> |
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AFRAME.registerComponent('movement', { |
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init: function () { |
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var el = this.el; |
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var playerState = 'idle'; |
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var stateMachine = new StateMachine({ |
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init: 'idle', |
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transitions: [ |
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{ name: 'moveForward', from: ['idle', 'moveBackward'], to: 'moveForward' }, |
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{ name: 'moveBackward', from: ['idle', 'moveForward'], to: 'moveBackward' }, |
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{ name: 'stop', from: ['moveForward', 'moveBackward'], to: 'idle' } |
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], |
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methods: { |
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onEnterMoveForward: function () { |
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el.setAttribute('animation', 'property: position; to: 0 1.5 -2; dur: 2000'); |
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}, |
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onEnterMoveBackward: function () { |
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el.setAttribute('animation', 'property: position; to: 0 1.5 -8; dur: 2000'); |
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}, |
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onLeaveMoveForward: function () { |
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el.setAttribute('animation', ''); |
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}, |
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onLeaveMoveBackward: function () { |
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el.setAttribute('animation', ''); |
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} |
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} |
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}); |
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document.addEventListener('keydown', function (event) { |
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switch (event.key) { |
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case 'ArrowUp': |
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stateMachine.moveForward(); |
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break; |
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case 'ArrowDown': |
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stateMachine.moveBackward(); |
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break; |
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} |
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}); |
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document.addEventListener('keyup', function (event) { |
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switch (event.key) { |
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case 'ArrowUp': |
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case 'ArrowDown': |
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stateMachine.stop(); |
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break; |
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} |
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}); |
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var birdSwarm = document.querySelector('#bird-swarm'); |
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var birdState = 'idle'; |
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var birdStateMachine = new StateMachine({ |
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init: 'follow', |
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transitions: [ |
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{ name: 'follow', from: 'idle', to: 'follow' }, |
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{ name: 'stop', from: 'follow', to: 'idle' } |
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], |
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methods: { |
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onEnterFollow: function () { |
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birdSwarm.setAttribute('animation', 'property: position; to: 0 1.5 -6; dur: 2000'); |
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}, |
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onLeaveFollow: function () { |
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birdSwarm.setAttribute('animation', ''); |
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} |
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} |
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}); |
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function updateBirdPosition () { |
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var playerPosition = el.getAttribute('position'); |
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birdSwarm.setAttribute('position', playerPosition.x + ' ' + playerPosition.y + ' ' + (playerPosition.z - 5)); |
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} |
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setInterval(function () { |
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updateBirdPosition(); |
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}, 100); |
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document.addEventListener('keydown', function (event) { |
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switch (event.key) { |
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case 'ArrowUp': |
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case 'ArrowDown': |
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birdStateMachine.follow(); |
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break; |
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} |
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}); |
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document.addEventListener('keyup', function (event) { |
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switch (event.key) { |
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case 'ArrowUp': |
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case 'ArrowDown': |
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birdStateMachine.stop(); |
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break; |
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} |
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}); |
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} |
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}); |
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</script> |
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</body> |
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</html> |
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