Updated builds.

build/three.js

@@ -9028,11 +9028,43 @@ THREE.BufferGeometry.prototype = {
 		*/
 
 		return offsets;
+
 	},
 
-	merge: function () {
+	merge: function ( geometry, offset ) {
+
+		if ( geometry instanceof THREE.BufferGeometry === false ) {
+
+			console.error( 'THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.', geometry );
+			return;
+
+		}
+
+		if ( offset === undefined ) offset = 0;
+
+		var attributes = this.attributes;
+
+		for ( var key in attributes ) {
 
-		console.log( 'BufferGeometry.merge(): TODO' );
+			if ( geometry.attributes[ key ] === undefined ) continue;
+
+			var attribute1 = attributes[ key ];
+			var attributeArray1 = attribute1.array;
+
+			var attribute2 = geometry.attributes[ key ];
+			var attributeArray2 = attribute2.array;
+
+			var attributeSize = attribute2.itemSize;
+
+			for ( var i = 0, j = attributeSize * offset; i < attributeArray2.length; i ++, j ++ ) {
+
+				attributeArray1[ j ] = attributeArray2[ i ];
+
+			}
+
+		}
+
+		return this;
 
 	},
 

build/three.min.js

@@ -193,10 +193,10 @@ c[d+8]=q.z;this.normalizeNormals();a.normal.needsUpdate=!0}},computeTangents:fun
 e=this.attributes.normal.array,f=this.attributes.uv.array,g=d.length/3;void 0===this.attributes.tangent&&this.addAttribute("tangent",new THREE.BufferAttribute(new Float32Array(4*g),4));for(var h=this.attributes.tangent.array,k=[],n=[],p=0;p<g;p++)k[p]=new THREE.Vector3,n[p]=new THREE.Vector3;var q=new THREE.Vector3,m=new THREE.Vector3,r=new THREE.Vector3,t=new THREE.Vector2,s=new THREE.Vector2,u=new THREE.Vector2,v,x,E,w,M,y,C,D,A,B,G,S=new THREE.Vector3,K=new THREE.Vector3,I,V,L,J,R;0===this.drawcalls.length&&
 this.addDrawCall(0,c.length,0);var Y=this.drawcalls,p=0;for(V=Y.length;p<V;++p){I=Y[p].start;L=Y[p].count;var T=Y[p].index,g=I;for(I+=L;g<I;g+=3)L=T+c[g],J=T+c[g+1],R=T+c[g+2],a(L,J,R)}var ya=new THREE.Vector3,oa=new THREE.Vector3,Ca=new THREE.Vector3,O=new THREE.Vector3,Ga,xa,za,p=0;for(V=Y.length;p<V;++p)for(I=Y[p].start,L=Y[p].count,T=Y[p].index,g=I,I+=L;g<I;g+=3)L=T+c[g],J=T+c[g+1],R=T+c[g+2],b(L),b(J),b(R)}},computeOffsets:function(a){var b=a;void 0===a&&(b=65535);Date.now();a=this.attributes.index.array;
 for(var c=this.attributes.position.array,d=a.length/3,e=new Uint16Array(a.length),f=0,g=0,h=[{start:0,count:0,index:0}],k=h[0],n=0,p=0,q=new Int32Array(6),m=new Int32Array(c.length),r=new Int32Array(c.length),t=0;t<c.length;t++)m[t]=-1,r[t]=-1;for(c=0;c<d;c++){for(var s=p=0;3>s;s++)t=a[3*c+s],-1==m[t]?(q[2*s]=t,q[2*s+1]=-1,p++):m[t]<k.index?(q[2*s]=t,q[2*s+1]=-1,n++):(q[2*s]=t,q[2*s+1]=m[t]);if(g+p>k.index+b)for(k={start:f,count:0,index:g},h.push(k),p=0;6>p;p+=2)s=q[p+1],-1<s&&s<k.index&&(q[p+1]=
--1);for(p=0;6>p;p+=2)t=q[p],s=q[p+1],-1===s&&(s=g++),m[t]=s,r[s]=t,e[f++]=s-k.index,k.count++}this.reorderBuffers(e,r,g);return this.offsets=h},merge:function(){console.log("BufferGeometry.merge(): TODO")},normalizeNormals:function(){for(var a=this.attributes.normal.array,b,c,d,e=0,f=a.length;e<f;e+=3)b=a[e],c=a[e+1],d=a[e+2],b=1/Math.sqrt(b*b+c*c+d*d),a[e]*=b,a[e+1]*=b,a[e+2]*=b},reorderBuffers:function(a,b,c){var d={},e;for(e in this.attributes)"index"!=e&&(d[e]=new this.attributes[e].array.constructor(this.attributes[e].itemSize*
-c));for(var f=0;f<c;f++){var g=b[f];for(e in this.attributes)if("index"!=e)for(var h=this.attributes[e].array,k=this.attributes[e].itemSize,n=d[e],p=0;p<k;p++)n[f*k+p]=h[g*k+p]}this.attributes.index.array=a;for(e in this.attributes)"index"!=e&&(this.attributes[e].array=d[e],this.attributes[e].numItems=this.attributes[e].itemSize*c)},toJSON:function(){var a={metadata:{version:4,type:"BufferGeometry",generator:"BufferGeometryExporter"},uuid:this.uuid,type:this.type,data:{attributes:{}}},b=this.attributes,
-c=this.offsets,d=this.boundingSphere,e;for(e in b){for(var f=b[e],g=[],h=f.array,k=0,n=h.length;k<n;k++)g[k]=h[k];a.data.attributes[e]={itemSize:f.itemSize,type:f.array.constructor.name,array:g}}0<c.length&&(a.data.offsets=JSON.parse(JSON.stringify(c)));null!==d&&(a.data.boundingSphere={center:d.center.toArray(),radius:d.radius});return a},clone:function(){var a=new THREE.BufferGeometry,b;for(b in this.attributes)a.addAttribute(b,this.attributes[b].clone());b=0;for(var c=this.offsets.length;b<c;b++){var d=
-this.offsets[b];a.offsets.push({start:d.start,index:d.index,count:d.count})}return a},dispose:function(){this.dispatchEvent({type:"dispose"})}};THREE.EventDispatcher.prototype.apply(THREE.BufferGeometry.prototype);
+-1);for(p=0;6>p;p+=2)t=q[p],s=q[p+1],-1===s&&(s=g++),m[t]=s,r[s]=t,e[f++]=s-k.index,k.count++}this.reorderBuffers(e,r,g);return this.offsets=h},merge:function(a,b){if(!1===a instanceof THREE.BufferGeometry)console.error("THREE.BufferGeometry.merge(): geometry not an instance of THREE.BufferGeometry.",a);else{void 0===b&&(b=0);var c=this.attributes,d;for(d in c)if(void 0!==a.attributes[d])for(var e=c[d].array,f=a.attributes[d],g=f.array,h=0,f=f.itemSize*b;h<g.length;h++,f++)e[f]=g[h];return this}},
+normalizeNormals:function(){for(var a=this.attributes.normal.array,b,c,d,e=0,f=a.length;e<f;e+=3)b=a[e],c=a[e+1],d=a[e+2],b=1/Math.sqrt(b*b+c*c+d*d),a[e]*=b,a[e+1]*=b,a[e+2]*=b},reorderBuffers:function(a,b,c){var d={},e;for(e in this.attributes)"index"!=e&&(d[e]=new this.attributes[e].array.constructor(this.attributes[e].itemSize*c));for(var f=0;f<c;f++){var g=b[f];for(e in this.attributes)if("index"!=e)for(var h=this.attributes[e].array,k=this.attributes[e].itemSize,n=d[e],p=0;p<k;p++)n[f*k+p]=h[g*
+k+p]}this.attributes.index.array=a;for(e in this.attributes)"index"!=e&&(this.attributes[e].array=d[e],this.attributes[e].numItems=this.attributes[e].itemSize*c)},toJSON:function(){var a={metadata:{version:4,type:"BufferGeometry",generator:"BufferGeometryExporter"},uuid:this.uuid,type:this.type,data:{attributes:{}}},b=this.attributes,c=this.offsets,d=this.boundingSphere,e;for(e in b){for(var f=b[e],g=[],h=f.array,k=0,n=h.length;k<n;k++)g[k]=h[k];a.data.attributes[e]={itemSize:f.itemSize,type:f.array.constructor.name,
+array:g}}0<c.length&&(a.data.offsets=JSON.parse(JSON.stringify(c)));null!==d&&(a.data.boundingSphere={center:d.center.toArray(),radius:d.radius});return a},clone:function(){var a=new THREE.BufferGeometry,b;for(b in this.attributes)a.addAttribute(b,this.attributes[b].clone());b=0;for(var c=this.offsets.length;b<c;b++){var d=this.offsets[b];a.offsets.push({start:d.start,index:d.index,count:d.count})}return a},dispose:function(){this.dispatchEvent({type:"dispose"})}};THREE.EventDispatcher.prototype.apply(THREE.BufferGeometry.prototype);
 THREE.Geometry=function(){Object.defineProperty(this,"id",{value:THREE.GeometryIdCount++});this.uuid=THREE.Math.generateUUID();this.name="";this.type="Geometry";this.vertices=[];this.colors=[];this.faces=[];this.faceVertexUvs=[[]];this.morphTargets=[];this.morphColors=[];this.morphNormals=[];this.skinWeights=[];this.skinIndices=[];this.lineDistances=[];this.boundingSphere=this.boundingBox=null;this.hasTangents=!1;this.dynamic=!0;this.groupsNeedUpdate=this.lineDistancesNeedUpdate=this.colorsNeedUpdate=
 this.tangentsNeedUpdate=this.normalsNeedUpdate=this.uvsNeedUpdate=this.elementsNeedUpdate=this.verticesNeedUpdate=!1};
 THREE.Geometry.prototype={constructor:THREE.Geometry,applyMatrix:function(a){for(var b=(new THREE.Matrix3).getNormalMatrix(a),c=0,d=this.vertices.length;c<d;c++)this.vertices[c].applyMatrix4(a);c=0;for(d=this.faces.length;c<d;c++){a=this.faces[c];a.normal.applyMatrix3(b).normalize();for(var e=0,f=a.vertexNormals.length;e<f;e++)a.vertexNormals[e].applyMatrix3(b).normalize()}this.boundingBox instanceof THREE.Box3&&this.computeBoundingBox();this.boundingSphere instanceof THREE.Sphere&&this.computeBoundingSphere()},