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html5的canvas实现3d雪花飘舞效果

时间2024-01-24 10:05:49发布访客分类HTML浏览912
导读:收集整理的这篇文章主要介绍了html5的canvas实现3d雪花飘舞效果,觉得挺不错的,现在分享给大家,也给大家做个参考。 复制代码代码如下:VAR SCREEN_WIDTH = window.innerWidth; var...
收集整理的这篇文章主要介绍了html5的canvas实现3d雪花飘舞效果,觉得挺不错的,现在分享给大家,也给大家做个参考。


复制代码代码如下:
VAR SCREEN_WIDTH = window.innerWidth;
var SCREEN_HeiGHT = window.innerHeight; /p> p> var container; /p> p> var particle; /p> p> var camera;
var scene;
var renderer; /p> p> var mouseX = 0;
var mouseY = 0; /p> p> var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;

var particles = [];
var particleImage = new Image(); //ThrEE.ImageUtils.loadTexture( "img/ParticlESMoke.png" );
particleImage.src = 'images/ParticleSmoke.png'; /p> p>

function inIT() { /p> p> container = document.createElement('div');
document.body.apPEndChild(container); /p> p> camera = new THREE.PerspectiveCamera( 75, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
camera.position.z = 1000; /p> p> scene = new THREE.Scene();
scene.add(camera);

renderer = new THREE.CanvasRenderer();
renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
var MATErial = new THREE.ParticleBasicMaterial( { map: new THREE.Texture(particleImage) } );

for (var i = 0; i 500; i++) { /p> p> particle = new Particle3D( material);
particle.position.x = Math.random() * 2000 - 1000;
particle.position.y = Math.random() * 2000 - 1000;
particle.position.z = Math.random() * 2000 - 1000;
particle.scale.x = particle.scale.y = 1;
scene.add( particle );

particles.push(particle);
} /p> p> container.appendChild( renderer.domElement ); /p> p>
document.addEventListener( 'mouSEMove', onDocumentMouseMove, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );

setInterval( loop, 1000 / 60 );

}

function onDocumentMouseMove( event ) { /p> p> mouseX = event.clientX - windowHalfX;
mouseY = event.clientY - windowHalfY;
} /p> p> function onDocumentTouchStart( event ) { /p> p> if ( event.touches.length == 1 ) { /p> p> event.preventDefault(); /p> p> mouseX = event.touches[ 0 ].pageX - windowHalfX;
mouseY = event.touches[ 0 ].pageY - windowHalfY;
}
} /p> p> function onDocumentTouchMove( event ) { /p> p> if ( event.touches.length == 1 ) { /p> p> event.PReventDefault(); /p> p> mouseX = event.touches[ 0 ].pageX - windowHalfX;
mouseY = event.touches[ 0 ].pageY - windowHalfY;
}
} /p> p> ///p> p> function loop() { /p> p> for(var i = 0; iparticles.length; i++)
{ /p> p> var particle = particles[i];
particle.updatePhysics();

with(particle.position)
{
if(y-1000) y+=2000;
if(x> 1000) x-=2000;
else if(x-1000) x+=2000;
if(z> 1000) z-=2000;
else if(z-1000) z+=2000;
}
}

camera.position.x += ( mouseX - camera.position.x ) * 0.05;
camera.position.y += ( - mouseY - camera.position.y ) * 0.05;
camera.lookAt(scene.position); /p> p> renderer.render( scene, camera ); /p> p>
}

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