【爱心表白-----使用HTML+CSS+JS实现（效果+源代码）】

scene = new THREE.Scene();

group = new THREE.Group();

scene.add( group );

// Get text from hash

var string = “LOVE U”;

var hash = document.location.hash.substr( 1 );

if ( hash.length !== 0 ) {

string = hash;

}

var text3d = new THREE.TextGeometry( string, {

size: 80,

height: 20,

curveSegments: 2,

font: “helvetiker”

});

text3d.computeBoundingBox();

var centerOffset = -0.5 * ( text3d.boundingBox.max.x - text3d.boundingBox.min.x );

var textMaterial = new THREE.MeshBasicMaterial( { color: Math.random() * 0xffffff, overdraw: 0.5 } );

text = new THREE.Mesh( text3d, textMaterial );

// Potentially, we can extract the vertices or faces of the text to generate particles too.

// Geo > Vertices > Position

text.position.x = centerOffset;

text.position.y = 100;

text.position.z = 0;

text.rotation.x = 0;

text.rotation.y = Math.PI * 2;

group.add( text );

particleCloud = new THREE.Object3D(); // Just a group

particleCloud.y = 800;

group.add( particleCloud );

// Create Particle Systems

// Heart

var x = 0, y = 0;

heartShape = new THREE.Shape();

heartShape.moveTo( x + 25, y + 25 );

heartShape.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y );

heartShape.bezierCurveTo( x - 30, y, x - 30, y + 35,x - 30,y + 35 );

heartShape.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 );

heartShape.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 );

heartShape.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y );

heartShape.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );

var hue = 0;

var hearts = function ( context ) {

context.globalAlpha = 0.5;

var x = 0, y = 0;

context.scale(0.05, -0.05); // Scale so canvas render can redraw within bounds

context.beginPath();

// From http://blog.burlock.org/html5/130-paths

context.bezierCurveTo( x + 2.5, y + 2.5, x + 2.0, y, x, y );

context.bezierCurveTo( x - 3.0, y, x - 3.0, y + 3.5,x - 3.0,y + 3.5 );

context.bezierCurveTo( x - 3.0, y + 5.5, x - 1.0, y + 7.7, x + 2.5, y + 9.5 );

context.bezierCurveTo( x + 6.0, y + 7.7, x + 8.0, y + 5.5, x + 8.0, y + 3.5 );

context.bezierCurveTo( x + 8.0, y + 3.5, x + 8.0, y, x + 5.0, y );

context.bezierCurveTo( x + 3.5, y, x + 2.5, y + 2.5, x + 2.5, y + 2.5 );

context.fill();

context.lineWidth = 0.5; //0.05

context.stroke();

}

var setTargetParticle = function() {

var material = new THREE.SpriteCanvasMaterial( {

program: hearts

} );

material.color.setHSL(hue, 1, 0.75);

hue += 0.001;

if (hue>1) hue-=1;

particle = new THREE.Sprite( material );

particle.scale.x = particle.scale.y = Math.random() * 40 + 40;

particleCloud.add( particle );

return particle;

};

var onParticleCreated = function( p ) {

p.target.position.copy( p.position );

};

var onParticleDead = function( particle ) {

particle.target.visible = false;

particleCloud.remove( particle.target );

};

sparksEmitter = new SPARKS.Emitter(new SPARKS.SteadyCounter(160));

emitterpos = new THREE.Vector3();

sparksEmitter.addInitializer(new SPARKS.Position( new SPARKS.PointZone( emitterpos ) ) );

sparksEmitter.addInitializer(new SPARKS.Lifetime(0,2));

sparksEmitter.addInitializer(new SPARKS.Target(null, setTargetParticle));

sparksEmitter.addInitializer(new SPARKS.Velocity(new SPARKS.PointZone(new THREE.Vector3(0,-50,10))));

// TOTRY Set velocity to move away from centroid

sparksEmitter.addAction(new SPARKS.Age());

//sparksEmitter.addAction(new SPARKS.Accelerate(0.2));

sparksEmitter.addAction(new SPARKS.Move());

sparksEmitter.addAction(new SPARKS.RandomDrift(50,50,2000));

sparksEmitter.addCallback(“created”, onParticleCreated);

sparksEmitter.addCallback(“dead”, onParticleDead);

sparksEmitter.addCallback(“updated”, function( particle ) {

particle.target.position.copy( particle.position );

});

sparksEmitter.start();

// End Particles

renderer = new THREE.CanvasRenderer();

renderer.setClearColor( 0xf0f0f0 );

renderer.setPixelRatio( window.devicePixelRatio );

renderer.setSize( window.innerWidth, window.innerHeight );

container.appendChild( renderer.domElement );

document.addEventListener( ‘mousedown’, onDocumentMouseDown, false );

document.addEventListener( ‘touchstart’, onDocumentTouchStart, false );

document.addEventListener( ‘touchmove’, onDocumentTouchMove, false );

window.addEventListener( ‘resize’, onWindowResize, false );

}

function onWindowResize() {

windowHalfX = window.innerWidth / 2;

windowHalfY = window.innerHeight / 2;

camera.aspect = window.innerWidth / window.innerHeight;

camera.updateProjectionMatrix();

renderer.setSize( window.innerWidth, window.innerHeight );

}

document.addEventListener( ‘mousemove’, onDocumentMouseMove, false );

function onDocumentMouseDown( event ) {

event.preventDefault();

mouseXOnMouseDown = event.clientX - windowHalfX;

targetRotationOnMouseDown = targetRotation;

if ( sparksEmitter.isRunning() ) {

sparksEmitter.stop();

} else {

sparksEmitter.start();

}

}

function onDocumentMouseMove( event ) {

mouseX = event.clientX - windowHalfX;

targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;

}

function onDocumentTouchStart( event ) {

if ( event.touches.length == 1 ) {

event.preventDefault();

mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;

targetRotationOnMouseDown = targetRotation;

}

}

function onDocumentTouchMove( event ) {

if ( event.touches.length == 1 ) {

event.preventDefault();

mouseX = event.touches[ 0 ].pageX - windowHalfX;

targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;

}

}

最后

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