Andrej Cimperšek - diploma

/*

        Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.

        Available via Academic Free License >= 2.1 OR the modified BSD license.

        see: http://dojotoolkit.org/license for details

*/

if(!dojo._hasResource["dojox.gfx3d.object"]){

dojo._hasResource["dojox.gfx3d.object"]=true;

dojo.provide("dojox.gfx3d.object");

dojo.require("dojox.gfx");

dojo.require("dojox.gfx3d.lighting");

dojo.require("dojox.gfx3d.scheduler");

dojo.require("dojox.gfx3d.vector");

dojo.require("dojox.gfx3d.gradient");

var out=function(o,x){

if(arguments.length>1){

o=x;

}

var e={};

for(var i in o){

if(i in e){

continue;

}

}

};

dojo.declare("dojox.gfx3d.Object",null,{constructor:function(){

this.object=null;

this.matrix=null;

this.cache=null;

this.renderer=null;

this.parent=null;

this.strokeStyle=null;

this.fillStyle=null;

this.shape=null;

},setObject:function(_1){

this.object=dojox.gfx.makeParameters(this.object,_1);

return this;

},setTransform:function(_2){

this.matrix=dojox.gfx3d.matrix.clone(_2?dojox.gfx3d.matrix.normalize(_2):dojox.gfx3d.identity,true);

return this;

},applyRightTransform:function(_3){

return _3?this.setTransform([this.matrix,_3]):this;

},applyLeftTransform:function(_4){

return _4?this.setTransform([_4,this.matrix]):this;

},applyTransform:function(_5){

return _5?this.setTransform([this.matrix,_5]):this;

},setFill:function(_6){

this.fillStyle=_6;

return this;

},setStroke:function(_7){

this.strokeStyle=_7;

return this;

},toStdFill:function(_8,_9){

return (this.fillStyle&&typeof this.fillStyle["type"]!="undefined")?_8[this.fillStyle.type](_9,this.fillStyle.finish,this.fillStyle.color):this.fillStyle;

},invalidate:function(){

this.renderer.addTodo(this);

},destroy:function(){

if(this.shape){

var p=this.shape.getParent();

if(p){

p.remove(this.shape);

}

this.shape=null;

}

},render:function(_a){

throw "Pure virtual function, not implemented";

},draw:function(_b){

throw "Pure virtual function, not implemented";

},getZOrder:function(){

return 0;

},getOutline:function(){

return null;

}});

dojo.declare("dojox.gfx3d.Scene",dojox.gfx3d.Object,{constructor:function(){

this.objects=[];

this.todos=[];

this.schedule=dojox.gfx3d.scheduler.zOrder;

this._draw=dojox.gfx3d.drawer.conservative;

},setFill:function(_c){

this.fillStyle=_c;

dojo.forEach(this.objects,function(_d){

_d.setFill(_c);

});

return this;

},setStroke:function(_e){

this.strokeStyle=_e;

dojo.forEach(this.objects,function(_f){

_f.setStroke(_e);

});

return this;

},render:function(_10,_11){

var m=dojox.gfx3d.matrix.multiply(_10,this.matrix);

if(_11){

this.todos=this.objects;

}

dojo.forEach(this.todos,function(_12){

_12.render(m,_11);

});

},draw:function(_13){

this.objects=this.schedule(this.objects);

this._draw(this.todos,this.objects,this.renderer);

},addTodo:function(_14){

if(dojo.every(this.todos,function(_15){

return _15!=_14;

})){

this.todos.push(_14);

this.invalidate();

}

},invalidate:function(){

this.parent.addTodo(this);

},getZOrder:function(){

var _16=0;

dojo.forEach(this.objects,function(_17){

_16+=_17.getZOrder();

});

return (this.objects.length>1)?_16/this.objects.length:0;

}});

dojo.declare("dojox.gfx3d.Edges",dojox.gfx3d.Object,{constructor:function(){

this.object=dojo.clone(dojox.gfx3d.defaultEdges);

},setObject:function(_18,_19){

this.object=dojox.gfx.makeParameters(this.object,(_18 instanceof Array)?{points:_18,style:_19}:_18);

return this;

},getZOrder:function(){

var _1a=0;

dojo.forEach(this.cache,function(_1b){

_1a+=_1b.z;

});

return (this.cache.length>1)?_1a/this.cache.length:0;

},render:function(_1c){

var m=dojox.gfx3d.matrix.multiply(_1c,this.matrix);

this.cache=dojo.map(this.object.points,function(_1d){

return dojox.gfx3d.matrix.multiplyPoint(m,_1d);

});

},draw:function(){

var c=this.cache;

if(this.shape){

this.shape.setShape("");

}else{

this.shape=this.renderer.createPath();

}

var p=this.shape.setAbsoluteMode("absolute");

if(this.object.style=="strip"||this.object.style=="loop"){

p.moveTo(c[0].x,c[0].y);

dojo.forEach(c.slice(1),function(_1e){

p.lineTo(_1e.x,_1e.y);

});

if(this.object.style=="loop"){

p.closePath();

}

}else{

for(var i=0;i<this.cache.length;){

p.moveTo(c[i].x,c[i].y);

i++;

p.lineTo(c[i].x,c[i].y);

i++;

}

}

p.setStroke(this.strokeStyle);

}});

dojo.declare("dojox.gfx3d.Orbit",dojox.gfx3d.Object,{constructor:function(){

this.object=dojo.clone(dojox.gfx3d.defaultOrbit);

},render:function(_1f){

var m=dojox.gfx3d.matrix.multiply(_1f,this.matrix);

var _20=[0,Math.PI/4,Math.PI/3];

var _21=dojox.gfx3d.matrix.multiplyPoint(m,this.object.center);

var _22=dojo.map(_20,function(_23){

return {x:this.center.x+this.radius*Math.cos(_23),y:this.center.y+this.radius*Math.sin(_23),z:this.center.z};

},this.object);

_22=dojo.map(_22,function(_24){

return dojox.gfx3d.matrix.multiplyPoint(m,_24);

});

var _25=dojox.gfx3d.vector.normalize(_22);

_22=dojo.map(_22,function(_26){

return dojox.gfx3d.vector.substract(_26,_21);

});

var A={xx:_22[0].x*_22[0].y,xy:_22[0].y*_22[0].y,xz:1,yx:_22[1].x*_22[1].y,yy:_22[1].y*_22[1].y,yz:1,zx:_22[2].x*_22[2].y,zy:_22[2].y*_22[2].y,zz:1,dx:0,dy:0,dz:0};

var B=dojo.map(_22,function(_27){

return -Math.pow(_27.x,2);

});

var X=dojox.gfx3d.matrix.multiplyPoint(dojox.gfx3d.matrix.invert(A),B[0],B[1],B[2]);

var _28=Math.atan2(X.x,1-X.y)/2;

var _29=dojo.map(_22,function(_2a){

return dojox.gfx.matrix.multiplyPoint(dojox.gfx.matrix.rotate(-_28),_2a.x,_2a.y);

});

var a=Math.pow(_29[0].x,2);

var b=Math.pow(_29[0].y,2);

var c=Math.pow(_29[1].x,2);

var d=Math.pow(_29[1].y,2);

var rx=Math.sqrt((a*d-b*c)/(d-b));

var ry=Math.sqrt((a*d-b*c)/(a-c));

this.cache={cx:_21.x,cy:_21.y,rx:rx,ry:ry,theta:_28,normal:_25};

},draw:function(_2b){

if(this.shape){

this.shape.setShape(this.cache);

}else{

this.shape=this.renderer.createEllipse(this.cache);

}

this.shape.applyTransform(dojox.gfx.matrix.rotateAt(this.cache.theta,this.cache.cx,this.cache.cy)).setStroke(this.strokeStyle).setFill(this.toStdFill(_2b,this.cache.normal));

}});

dojo.declare("dojox.gfx3d.Path3d",dojox.gfx3d.Object,{constructor:function(){

this.object=dojo.clone(dojox.gfx3d.defaultPath3d);

this.segments=[];

this.absolute=true;

this.last={};

this.path="";

},_collectArgs:function(_2c,_2d){

for(var i=0;i<_2d.length;++i){

var t=_2d[i];

if(typeof (t)=="boolean"){

_2c.push(t?1:0);

}else{

if(typeof (t)=="number"){

_2c.push(t);

}else{

if(t instanceof Array){

this._collectArgs(_2c,t);

}else{

if("x" in t&&"y" in t){

_2c.push(t.x);

_2c.push(t.y);

}

}

}

}

}

},_validSegments:{m:3,l:3,z:0},_pushSegment:function(_2e,_2f){

var _30=this._validSegments[_2e.toLowerCase()],_31;

if(typeof (_30)=="number"){

if(_30){

if(_2f.length>=_30){

_31={action:_2e,args:_2f.slice(0,_2f.length-_2f.length%_30)};

this.segments.push(_31);

}

}else{

_31={action:_2e,args:[]};

this.segments.push(_31);

}

}

},moveTo:function(){

var _32=[];

this._collectArgs(_32,arguments);

this._pushSegment(this.absolute?"M":"m",_32);

return this;

},lineTo:function(){

var _33=[];

this._collectArgs(_33,arguments);

this._pushSegment(this.absolute?"L":"l",_33);

return this;

},closePath:function(){

this._pushSegment("Z",[]);

return this;

},render:function(_34){

var m=dojox.gfx3d.matrix.multiply(_34,this.matrix);

var _35="";

var _36=this._validSegments;

dojo.forEach(this.segments,function(_37){

_35+=_37.action;

for(var i=0;i<_37.args.length;i+=_36[_37.action.toLowerCase()]){

var pt=dojox.gfx3d.matrix.multiplyPoint(m,_37.args[i],_37.args[i+1],_37.args[i+2]);

_35+=" "+pt.x+" "+pt.y;

}

});

this.cache=_35;

},_draw:function(){

return this.parent.createPath(this.cache);

}});

dojo.declare("dojox.gfx3d.Triangles",dojox.gfx3d.Object,{constructor:function(){

this.object=dojo.clone(dojox.gfx3d.defaultTriangles);

},setObject:function(_38,_39){

if(_38 instanceof Array){

this.object=dojox.gfx.makeParameters(this.object,{points:_38,style:_39});

}else{

this.object=dojox.gfx.makeParameters(this.object,_38);

}

return this;

},render:function(_3a){

var m=dojox.gfx3d.matrix.multiply(_3a,this.matrix);

var c=dojo.map(this.object.points,function(_3b){

return dojox.gfx3d.matrix.multiplyPoint(m,_3b);

});

this.cache=[];

var _3c=c.slice(0,2);

var _3d=c[0];

if(this.object.style=="strip"){

dojo.forEach(c.slice(2),function(_3e){

_3c.push(_3e);

_3c.push(_3c[0]);

this.cache.push(_3c);

_3c=_3c.slice(1,3);

},this);

}else{

if(this.object.style=="fan"){

dojo.forEach(c.slice(2),function(_3f){

_3c.push(_3f);

_3c.push(_3d);

this.cache.push(_3c);

_3c=[_3d,_3f];

},this);

}else{

for(var i=0;i<c.length;){

this.cache.push([c[i],c[i+1],c[i+2],c[i]]);

i+=3;

}

}

}

},draw:function(_40){

this.cache=dojox.gfx3d.scheduler.bsp(this.cache,function(it){

return it;

});

if(this.shape){

this.shape.clear();

}else{

this.shape=this.renderer.createGroup();

}

dojo.forEach(this.cache,function(_41){

this.shape.createPolyline(_41).setStroke(this.strokeStyle).setFill(this.toStdFill(_40,dojox.gfx3d.vector.normalize(_41)));

},this);

},getZOrder:function(){

var _42=0;

dojo.forEach(this.cache,function(_43){

_42+=(_43[0].z+_43[1].z+_43[2].z)/3;

});

return (this.cache.length>1)?_42/this.cache.length:0;

}});

dojo.declare("dojox.gfx3d.Quads",dojox.gfx3d.Object,{constructor:function(){

this.object=dojo.clone(dojox.gfx3d.defaultQuads);

},setObject:function(_44,_45){

this.object=dojox.gfx.makeParameters(this.object,(_44 instanceof Array)?{points:_44,style:_45}:_44);

return this;

},render:function(_46){

var m=dojox.gfx3d.matrix.multiply(_46,this.matrix),i;

var c=dojo.map(this.object.points,function(_47){

return dojox.gfx3d.matrix.multiplyPoint(m,_47);

});

this.cache=[];

if(this.object.style=="strip"){

var _48=c.slice(0,2);

for(i=2;i<c.length;){

_48=_48.concat([c[i],c[i+1],_48[0]]);

this.cache.push(_48);

_48=_48.slice(2,4);

i+=2;

}

}else{

for(i=0;i<c.length;){

this.cache.push([c[i],c[i+1],c[i+2],c[i+3],c[i]]);

i+=4;

}

}

},draw:function(_49){

this.cache=dojox.gfx3d.scheduler.bsp(this.cache,function(it){

return it;

});

if(this.shape){

this.shape.clear();

}else{

this.shape=this.renderer.createGroup();

}

for(var x=0;x<this.cache.length;x++){

this.shape.createPolyline(this.cache[x]).setStroke(this.strokeStyle).setFill(this.toStdFill(_49,dojox.gfx3d.vector.normalize(this.cache[x])));

}

},getZOrder:function(){

var _4a=0;

for(var x=0;x<this.cache.length;x++){

var i=this.cache[x];

_4a+=(i[0].z+i[1].z+i[2].z+i[3].z)/4;

}

return (this.cache.length>1)?_4a/this.cache.length:0;

}});

dojo.declare("dojox.gfx3d.Polygon",dojox.gfx3d.Object,{constructor:function(){

this.object=dojo.clone(dojox.gfx3d.defaultPolygon);

},setObject:function(_4b){

this.object=dojox.gfx.makeParameters(this.object,(_4b instanceof Array)?{path:_4b}:_4b);

return this;

},render:function(_4c){

var m=dojox.gfx3d.matrix.multiply(_4c,this.matrix);

this.cache=dojo.map(this.object.path,function(_4d){

return dojox.gfx3d.matrix.multiplyPoint(m,_4d);

});

this.cache.push(this.cache[0]);

},draw:function(_4e){

if(this.shape){

this.shape.setShape({points:this.cache});

}else{

this.shape=this.renderer.createPolyline({points:this.cache});

}

this.shape.setStroke(this.strokeStyle).setFill(this.toStdFill(_4e,dojox.gfx3d.matrix.normalize(this.cache)));

},getZOrder:function(){

var _4f=0;

for(var x=0;x<this.cache.length;x++){

_4f+=this.cache[x].z;

}

return (this.cache.length>1)?_4f/this.cache.length:0;

},getOutline:function(){

return this.cache.slice(0,3);

}});

dojo.declare("dojox.gfx3d.Cube",dojox.gfx3d.Object,{constructor:function(){

this.object=dojo.clone(dojox.gfx3d.defaultCube);

this.polygons=[];

},setObject:function(_50){

this.object=dojox.gfx.makeParameters(this.object,_50);

},render:function(_51){

var a=this.object.top;

var g=this.object.bottom;

var b={x:g.x,y:a.y,z:a.z};

var c={x:g.x,y:g.y,z:a.z};

var d={x:a.x,y:g.y,z:a.z};

var e={x:a.x,y:a.y,z:g.z};

var f={x:g.x,y:a.y,z:g.z};

var h={x:a.x,y:g.y,z:g.z};

var _52=[a,b,c,d,e,f,g,h];

var m=dojox.gfx3d.matrix.multiply(_51,this.matrix);

var p=dojo.map(_52,function(_53){

return dojox.gfx3d.matrix.multiplyPoint(m,_53);

});

a=p[0];

b=p[1];

c=p[2];

d=p[3];

e=p[4];

f=p[5];

g=p[6];

h=p[7];

this.cache=[[a,b,c,d,a],[e,f,g,h,e],[a,d,h,e,a],[d,c,g,h,d],[c,b,f,g,c],[b,a,e,f,b]];

},draw:function(_54){

this.cache=dojox.gfx3d.scheduler.bsp(this.cache,function(it){

return it;

});

var _55=this.cache.slice(3);

if(this.shape){

this.shape.clear();

}else{

this.shape=this.renderer.createGroup();

}

for(var x=0;x<_55.length;x++){

this.shape.createPolyline(_55[x]).setStroke(this.strokeStyle).setFill(this.toStdFill(_54,dojox.gfx3d.vector.normalize(_55[x])));

}

},getZOrder:function(){

var top=this.cache[0][0];

var _56=this.cache[1][2];

return (top.z+_56.z)/2;

}});

dojo.declare("dojox.gfx3d.Cylinder",dojox.gfx3d.Object,{constructor:function(){

this.object=dojo.clone(dojox.gfx3d.defaultCylinder);

},render:function(_57){

var m=dojox.gfx3d.matrix.multiply(_57,this.matrix);

var _58=[0,Math.PI/4,Math.PI/3];

var _59=dojox.gfx3d.matrix.multiplyPoint(m,this.object.center);

var _5a=dojo.map(_58,function(_5b){

return {x:this.center.x+this.radius*Math.cos(_5b),y:this.center.y+this.radius*Math.sin(_5b),z:this.center.z};

},this.object);

_5a=dojo.map(_5a,function(_5c){

return dojox.gfx3d.vector.substract(dojox.gfx3d.matrix.multiplyPoint(m,_5c),_59);

});

var A={xx:_5a[0].x*_5a[0].y,xy:_5a[0].y*_5a[0].y,xz:1,yx:_5a[1].x*_5a[1].y,yy:_5a[1].y*_5a[1].y,yz:1,zx:_5a[2].x*_5a[2].y,zy:_5a[2].y*_5a[2].y,zz:1,dx:0,dy:0,dz:0};

var B=dojo.map(_5a,function(_5d){

return -Math.pow(_5d.x,2);

});

var X=dojox.gfx3d.matrix.multiplyPoint(dojox.gfx3d.matrix.invert(A),B[0],B[1],B[2]);

var _5e=Math.atan2(X.x,1-X.y)/2;

var _5f=dojo.map(_5a,function(_60){

return dojox.gfx.matrix.multiplyPoint(dojox.gfx.matrix.rotate(-_5e),_60.x,_60.y);

});

var a=Math.pow(_5f[0].x,2);

var b=Math.pow(_5f[0].y,2);

var c=Math.pow(_5f[1].x,2);

var d=Math.pow(_5f[1].y,2);

var rx=Math.sqrt((a*d-b*c)/(d-b));

var ry=Math.sqrt((a*d-b*c)/(a-c));

if(rx<ry){

var t=rx;

rx=ry;

ry=t;

_5e-=Math.PI/2;

}

var top=dojox.gfx3d.matrix.multiplyPoint(m,dojox.gfx3d.vector.sum(this.object.center,{x:0,y:0,z:this.object.height}));

var _61=this.fillStyle.type=="constant"?this.fillStyle.color:dojox.gfx3d.gradient(this.renderer.lighting,this.fillStyle,this.object.center,this.object.radius,Math.PI,2*Math.PI,m);

if(isNaN(rx)||isNaN(ry)||isNaN(_5e)){

rx=this.object.radius,ry=0,_5e=0;

}

this.cache={center:_59,top:top,rx:rx,ry:ry,theta:_5e,gradient:_61};

},draw:function(){

var c=this.cache,v=dojox.gfx3d.vector,m=dojox.gfx.matrix,_62=[c.center,c.top],_63=v.substract(c.top,c.center);

if(v.dotProduct(_63,this.renderer.lighting.incident)>0){

_62=[c.top,c.center];

_63=v.substract(c.center,c.top);

}

var _64=this.renderer.lighting[this.fillStyle.type](_63,this.fillStyle.finish,this.fillStyle.color),d=Math.sqrt(Math.pow(c.center.x-c.top.x,2)+Math.pow(c.center.y-c.top.y,2));

if(this.shape){

this.shape.clear();

}else{

this.shape=this.renderer.createGroup();

}

this.shape.createPath("").moveTo(0,-c.rx).lineTo(d,-c.rx).lineTo(d,c.rx).lineTo(0,c.rx).arcTo(c.ry,c.rx,0,true,true,0,-c.rx).setFill(c.gradient).setStroke(this.strokeStyle).setTransform([m.translate(_62[0]),m.rotate(Math.atan2(_62[1].y-_62[0].y,_62[1].x-_62[0].x))]);

if(c.rx>0&&c.ry>0){

this.shape.createEllipse({cx:_62[1].x,cy:_62[1].y,rx:c.rx,ry:c.ry}).setFill(_64).setStroke(this.strokeStyle).applyTransform(m.rotateAt(c.theta,_62[1]));

}

}});

dojo.declare("dojox.gfx3d.Viewport",dojox.gfx.Group,{constructor:function(){

this.dimension=null;

this.objects=[];

this.todos=[];

this.renderer=this;

this.schedule=dojox.gfx3d.scheduler.zOrder;

this.draw=dojox.gfx3d.drawer.conservative;

this.deep=false;

this.lights=[];

this.lighting=null;

},setCameraTransform:function(_65){

this.camera=dojox.gfx3d.matrix.clone(_65?dojox.gfx3d.matrix.normalize(_65):dojox.gfx3d.identity,true);

this.invalidate();

return this;

},applyCameraRightTransform:function(_66){

return _66?this.setCameraTransform([this.camera,_66]):this;

},applyCameraLeftTransform:function(_67){

return _67?this.setCameraTransform([_67,this.camera]):this;

},applyCameraTransform:function(_68){

return this.applyCameraRightTransform(_68);

},setLights:function(_69,_6a,_6b){

this.lights=(_69 instanceof Array)?{sources:_69,ambient:_6a,specular:_6b}:_69;

var _6c={x:0,y:0,z:1};

this.lighting=new dojox.gfx3d.lighting.Model(_6c,this.lights.sources,this.lights.ambient,this.lights.specular);

this.invalidate();

return this;

},addLights:function(_6d){

return this.setLights(this.lights.sources.concat(_6d));

},addTodo:function(_6e){

if(dojo.every(this.todos,function(_6f){

return _6f!=_6e;

})){

this.todos.push(_6e);

}

},invalidate:function(){

this.deep=true;

this.todos=this.objects;

},setDimensions:function(dim){

if(dim){

var w=dojo.isString(dim.width)?parseInt(dim.width):dim.width;

var h=dojo.isString(dim.height)?parseInt(dim.height):dim.height;

var trs=this.rawNode.style;

trs.height=h;

trs.width=w;

this.dimension={width:w,height:h};

}else{

this.dimension=null;

}

},render:function(){

if(!this.todos.length){

return;

}

var m=dojox.gfx3d.matrix;

for(var x=0;x<this.todos.length;x++){

this.todos[x].render(dojox.gfx3d.matrix.normalize([m.cameraRotateXg(180),m.cameraTranslate(0,this.dimension.height,0),this.camera]),this.deep);

}

this.objects=this.schedule(this.objects);

this.draw(this.todos,this.objects,this);

this.todos=[];

this.deep=false;

}});

dojox.gfx3d.Viewport.nodeType=dojox.gfx.Group.nodeType;

dojox.gfx3d._creators={createEdges:function(_70,_71){

return this.create3DObject(dojox.gfx3d.Edges,_70,_71);

},createTriangles:function(_72,_73){

return this.create3DObject(dojox.gfx3d.Triangles,_72,_73);

},createQuads:function(_74,_75){

return this.create3DObject(dojox.gfx3d.Quads,_74,_75);

},createPolygon:function(_76){

return this.create3DObject(dojox.gfx3d.Polygon,_76);

},createOrbit:function(_77){

return this.create3DObject(dojox.gfx3d.Orbit,_77);

},createCube:function(_78){

return this.create3DObject(dojox.gfx3d.Cube,_78);

},createCylinder:function(_79){

return this.create3DObject(dojox.gfx3d.Cylinder,_79);

},createPath3d:function(_7a){

return this.create3DObject(dojox.gfx3d.Path3d,_7a);

},createScene:function(){

return this.create3DObject(dojox.gfx3d.Scene);

},create3DObject:function(_7b,_7c,_7d){

var obj=new _7b();

this.adopt(obj);

if(_7c){

obj.setObject(_7c,_7d);

}

return obj;

},adopt:function(obj){

obj.renderer=this.renderer;

obj.parent=this;

this.objects.push(obj);

this.addTodo(obj);

return this;

},abandon:function(obj,_7e){

for(var i=0;i<this.objects.length;++i){

if(this.objects[i]==obj){

this.objects.splice(i,1);

}

}

obj.parent=null;

return this;

},setScheduler:function(_7f){

this.schedule=_7f;

},setDrawer:function(_80){

this.draw=_80;

}};

dojo.extend(dojox.gfx3d.Viewport,dojox.gfx3d._creators);

dojo.extend(dojox.gfx3d.Scene,dojox.gfx3d._creators);

delete dojox.gfx3d._creators;

dojo.extend(dojox.gfx.Surface,{createViewport:function(){

var _81=this.createObject(dojox.gfx3d.Viewport,null,true);

_81.setDimensions(this.getDimensions());

return _81;

}});

}