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javascript 多图浏览超炫效果_图象特效

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發布： 2016-05-16 18:40:31

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<title>Wanna tell her - interactive DHTML </title> 
<meta http-equiv="imagetoolbar" content="no"> 
<style type="text/css"> 
html { 
overflow: hidden; 
} 
body { 
position: absolute; 
margin: 0px; 
padding: 0px; 
background: #fff; 
width: 100%; 
height: 100%; 
} 
#screen { 
position: absolute; 
left: 10%; 
top: 10%; 
width: 80%; 
height: 80%; 
background: #fff; 
} 
#screen img { 
position: absolute; 
cursor: pointer; 
width: 0px; 
height: 0px; 
-ms-interpolation-mode:nearest-neighbor; 
} 
#bankImages { 
visibility: hidden; 
} 
#FPS { 
position: absolute; 
right: 5px; 
bottom: 5px; 
font-size: 10px; 
color: #666; 
font-family: verdana; 
}

</style>

/* ==== on mouse over event ==== */ 
o.onmouseover = function () { 
if (this != tv.o) { 
this.point3D.z.target = tv.mouseZ; 
tv.camera.x.target = this.point3D.x; 
tv.camera.y.target = this.point3D.y; 
if (tv.o) tv.o.point3D.z.target = 0; 
tv.o = this; 
} 
return false; 
}

/* ==== on mousedown event ==== */ 
o.onmousedown = function () { 
if (this == tv.o) { 
if (this.point3D.z.target == tv.mouseZ) this.point3D.z.target = 0; 
else { 
tv.o = false; 
this.onmouseover(); 
} 
} 
}

/* ==== main 3D function ==== */ 
o.animate = function () { 
/* ==== 3D coordinates ==== */ 
var x = this.point3D.x - tv.camera.x.position; 
var y = this.point3D.y - tv.camera.y.position; 
this.point3D.z.move(this.point3D.z.target, this.point3D.z.target ? .15 : .08); 
/* ==== rotations ==== */ 
var xy = tv.angle.cx * y - tv.angle.sx * this.point3D.z.position; 
var xz = tv.angle.sx * y + tv.angle.cx * this.point3D.z.position; 
var yz = tv.angle.cy * xz - tv.angle.sy * x; 
var yx = tv.angle.sy * xz + tv.angle.cy * x; 
/* ==== 2D transform ==== */ 
var scale = tv.camera.focalLength / (tv.camera.focalLength + yz); 
x = yx * scale; 
y = xy * scale; 
var w = Math.round(Math.max(0, this.point3D.w * scale * this.point3D.sw)); 
var h = Math.round(Math.max(0, this.point3D.h * scale * this.point3D.sh)); 
/* ==== HTML rendering ==== */ 
var o = this.style; 
o.left = Math.round(x + tv.screen.w - w * .5) + 'px'; 
o.top = Math.round(y + tv.screen.h - h * .5) + 'px'; 
o.width = w + 'px'; 
o.height = h + 'px'; 
o.zIndex = 10000 + Math.round(scale * 1000); 
} 
},

/* ==== init script ==== */ 
init : function (structure, FL, mouseZ, rx, ry) { 
this.screen.obj = document.getElementById('screen'); 
this.screen.obj.onselectstart = function () { return false; } 
this.screen.obj.ondrag = function () { return false; } 
this.mouseZ = mouseZ; 
this.camera.focalLength = FL; 
this.angle.rx = rx; 
this.angle.ry = ry; 
/* ==== create objects ==== */ 
var i = 0, o; 
while( o = structure[i++] ) 
this.create3DHTML(o.img, o.x, o.y, o.z, o.sw, o.sh); 
/* ==== start script ==== */ 
this.resize(); 
mouse.y = this.screen.y + this.screen.h; 
mouse.x = this.screen.x + this.screen.w; 
/* ==== loop ==== */ 
setInterval(tv.run, 16); 
setInterval(tv.dFPS, 1000); 
},

/* ==== resize window ==== */ 
resize : function () { 
var o = tv.screen.obj; 
if (o) { 
tv.screen.w = o.offsetWidth / 2; 
tv.screen.h = o.offsetHeight / 2; 
for (tv.screen.x = 0, tv.screen.y = 0; o != null; o = o.offsetParent) { 
tv.screen.x += o.offsetLeft; 
tv.screen.y += o.offsetTop; 
} 
} 
},

/* ==== main loop ==== */ 
run : function () { 
tv.fps++; 
/* ==== motion ease ==== */ 
tv.angle.x.move(-(mouse.y - tv.screen.h - tv.screen.y) * tv.angle.rx, .1); 
tv.angle.y.move( (mouse.x - tv.screen.w - tv.screen.x) * tv.angle.ry, .1); 
tv.camera.x.move(tv.camera.x.target, .025); 
tv.camera.y.move(tv.camera.y.target, .025); 
/* ==== angles sin and cos ==== */ 
tv.angle.cx = Math.cos(tv.angle.x.position); 
tv.angle.sx = Math.sin(tv.angle.x.position); 
tv.angle.cy = Math.cos(tv.angle.y.position); 
tv.angle.sy = Math.sin(tv.angle.y.position); 
/* ==== loop through images ==== */ 
var i = 0, o; 
while( o = tv.O[i++] ) o.animate(); 
},

/* ==== trace frames per seconds ==== */ 
dFPS : function () { 
document.getElementById('FPS').innerHTML = tv.fps + ' FPS'; 
tv.fps = 0; 
} 
}

/* ==== global mouse position ==== */ 
var mouse = { 
x : 0, 
y : 0 
} 
document.onmousemove = function(e) { 
if (window.event) e = window.event; 
mouse.x = e.clientX; 
mouse.y = e.clientY; 
return false; 
}

/* ==== starting script ==== */ 
onload = function() { 
onresize = tv.resize; 
/* ==== build grid ==== */ 
var img = document.getElementById('bankImages').getElementsByTagName('img'); 
var structure = []; 
for (var i = -300; i <= 300; i += 120) 
for (var j = -300; j <= 300; j += 120) 
structure.push({ img:img[0], x:i, y:j, z:0, sw:.5, sh:.5 }); 
/* ==== let's go ==== */ 
tv.init(structure, 350, -200, .005, .0025); 
}

</script>

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