From 776d618160dfc8589bfbf42aa5ec9fc63324824c Mon Sep 17 00:00:00 2001
From: alteredq <postfilter@gmail.com>
Date: Sat, 25 Feb 2012 03:41:11 +0100
Subject: [PATCH] Added THREE.Math.sign

---
 build/Three.js              | 2 +-
 build/custom/ThreeCanvas.js | 2 +-
 build/custom/ThreeDOM.js    | 2 +-
 build/custom/ThreeSVG.js    | 2 +-
 build/custom/ThreeWebGL.js  | 2 +-
 src/core/Math.js            | 6 ++++++
 6 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/build/Three.js b/build/Three.js
index bb993726dc..90ec495572 100644
--- a/build/Three.js
+++ b/build/Three.js
@@ -29,7 +29,7 @@ THREE.Face4&&(g=E.multiplyVector3(g.copy(u[b.a].position)),e=E.multiplyVector3(e
 THREE.Rectangle=function(){function a(){g=d-b;e=f-c}var b,c,d,f,g,e,h=!0;this.getX=function(){return b};this.getY=function(){return c};this.getWidth=function(){return g};this.getHeight=function(){return e};this.getLeft=function(){return b};this.getTop=function(){return c};this.getRight=function(){return d};this.getBottom=function(){return f};this.set=function(g,e,k,q){h=!1;b=g;c=e;d=k;f=q;a()};this.addPoint=function(g,e){h?(h=!1,b=g,c=e,d=g,f=e):(b=b<g?b:g,c=c<e?c:e,d=d>g?d:g,f=f>e?f:e);a()};this.add3Points=
 function(g,e,k,q,m,o){h?(h=!1,b=g<k?g<m?g:m:k<m?k:m,c=e<q?e<o?e:o:q<o?q:o,d=g>k?g>m?g:m:k>m?k:m,f=e>q?e>o?e:o:q>o?q:o):(b=g<k?g<m?g<b?g:b:m<b?m:b:k<m?k<b?k:b:m<b?m:b,c=e<q?e<o?e<c?e:c:o<c?o:c:q<o?q<c?q:c:o<c?o:c,d=g>k?g>m?g>d?g:d:m>d?m:d:k>m?k>d?k:d:m>d?m:d,f=e>q?e>o?e>f?e:f:o>f?o:f:q>o?q>f?q:f:o>f?o:f);a()};this.addRectangle=function(g){h?(h=!1,b=g.getLeft(),c=g.getTop(),d=g.getRight(),f=g.getBottom()):(b=b<g.getLeft()?b:g.getLeft(),c=c<g.getTop()?c:g.getTop(),d=d>g.getRight()?d:g.getRight(),f=f>
 g.getBottom()?f:g.getBottom());a()};this.inflate=function(g){b-=g;c-=g;d+=g;f+=g;a()};this.minSelf=function(g){b=b>g.getLeft()?b:g.getLeft();c=c>g.getTop()?c:g.getTop();d=d<g.getRight()?d:g.getRight();f=f<g.getBottom()?f:g.getBottom();a()};this.intersects=function(a){return d<a.getLeft()||b>a.getRight()||f<a.getTop()||c>a.getBottom()?!1:!0};this.empty=function(){h=!0;f=d=c=b=0;a()};this.isEmpty=function(){return h}};
-THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,f){return d+(a-b)*(f-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())}};THREE.Matrix3=function(){this.m=[]};
+THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,f){return d+(a-b)*(f-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())},sign:function(a){return 0>a?-1:0<a?1:0}};THREE.Matrix3=function(){this.m=[]};
 THREE.Matrix3.prototype={constructor:THREE.Matrix3,transpose:function(){var a,b=this.m;a=b[1];b[1]=b[3];b[3]=a;a=b[2];b[2]=b[6];b[6]=a;a=b[5];b[5]=b[7];b[7]=a;return this},transposeIntoArray:function(a){var b=this.m;a[0]=b[0];a[1]=b[3];a[2]=b[6];a[3]=b[1];a[4]=b[4];a[5]=b[7];a[6]=b[2];a[7]=b[5];a[8]=b[8];return this}};
 THREE.Matrix4=function(a,b,c,d,f,g,e,h,i,j,k,q,m,o,p,n){this.set(void 0!==a?a:1,b||0,c||0,d||0,f||0,void 0!==g?g:1,e||0,h||0,i||0,j||0,void 0!==k?k:1,q||0,m||0,o||0,p||0,void 0!==n?n:1);this.flat=Array(16);this.m33=new THREE.Matrix3};
 THREE.Matrix4.prototype={constructor:THREE.Matrix4,set:function(a,b,c,d,f,g,e,h,i,j,k,q,m,o,p,n){this.n11=a;this.n12=b;this.n13=c;this.n14=d;this.n21=f;this.n22=g;this.n23=e;this.n24=h;this.n31=i;this.n32=j;this.n33=k;this.n34=q;this.n41=m;this.n42=o;this.n43=p;this.n44=n;return this},identity:function(){this.set(1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1);return this},copy:function(a){this.set(a.n11,a.n12,a.n13,a.n14,a.n21,a.n22,a.n23,a.n24,a.n31,a.n32,a.n33,a.n34,a.n41,a.n42,a.n43,a.n44);return this},lookAt:function(a,
diff --git a/build/custom/ThreeCanvas.js b/build/custom/ThreeCanvas.js
index e4d22b7d8c..e7d21868d8 100644
--- a/build/custom/ThreeCanvas.js
+++ b/build/custom/ThreeCanvas.js
@@ -28,7 +28,7 @@ THREE.Face4&&(f=u.multiplyVector3(f.copy(E[b.a].position)),g=u.multiplyVector3(g
 THREE.Rectangle=function(){function a(){f=d-b;g=e-c}var b,c,d,e,f,g,h=!0;this.getX=function(){return b};this.getY=function(){return c};this.getWidth=function(){return f};this.getHeight=function(){return g};this.getLeft=function(){return b};this.getTop=function(){return c};this.getRight=function(){return d};this.getBottom=function(){return e};this.set=function(f,g,i,o){h=!1;b=f;c=g;d=i;e=o;a()};this.addPoint=function(f,g){h?(h=!1,b=f,c=g,d=f,e=g):(b=b<f?b:f,c=c<g?c:g,d=d>f?d:f,e=e>g?e:g);a()};this.add3Points=
 function(f,g,i,o,m,n){h?(h=!1,b=f<i?f<m?f:m:i<m?i:m,c=g<o?g<n?g:n:o<n?o:n,d=f>i?f>m?f:m:i>m?i:m,e=g>o?g>n?g:n:o>n?o:n):(b=f<i?f<m?f<b?f:b:m<b?m:b:i<m?i<b?i:b:m<b?m:b,c=g<o?g<n?g<c?g:c:n<c?n:c:o<n?o<c?o:c:n<c?n:c,d=f>i?f>m?f>d?f:d:m>d?m:d:i>m?i>d?i:d:m>d?m:d,e=g>o?g>n?g>e?g:e:n>e?n:e:o>n?o>e?o:e:n>e?n:e);a()};this.addRectangle=function(f){h?(h=!1,b=f.getLeft(),c=f.getTop(),d=f.getRight(),e=f.getBottom()):(b=b<f.getLeft()?b:f.getLeft(),c=c<f.getTop()?c:f.getTop(),d=d>f.getRight()?d:f.getRight(),e=e>
 f.getBottom()?e:f.getBottom());a()};this.inflate=function(f){b-=f;c-=f;d+=f;e+=f;a()};this.minSelf=function(f){b=b>f.getLeft()?b:f.getLeft();c=c>f.getTop()?c:f.getTop();d=d<f.getRight()?d:f.getRight();e=e<f.getBottom()?e:f.getBottom();a()};this.intersects=function(a){return d<a.getLeft()||b>a.getRight()||e<a.getTop()||c>a.getBottom()?!1:!0};this.empty=function(){h=!0;e=d=c=b=0;a()};this.isEmpty=function(){return h}};
-THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,e){return d+(a-b)*(e-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())}};THREE.Matrix3=function(){this.m=[]};
+THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,e){return d+(a-b)*(e-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())},sign:function(a){return 0>a?-1:0<a?1:0}};THREE.Matrix3=function(){this.m=[]};
 THREE.Matrix3.prototype={constructor:THREE.Matrix3,transpose:function(){var a,b=this.m;a=b[1];b[1]=b[3];b[3]=a;a=b[2];b[2]=b[6];b[6]=a;a=b[5];b[5]=b[7];b[7]=a;return this},transposeIntoArray:function(a){var b=this.m;a[0]=b[0];a[1]=b[3];a[2]=b[6];a[3]=b[1];a[4]=b[4];a[5]=b[7];a[6]=b[2];a[7]=b[5];a[8]=b[8];return this}};
 THREE.Matrix4=function(a,b,c,d,e,f,g,h,l,j,i,o,m,n,p,k){this.set(void 0!==a?a:1,b||0,c||0,d||0,e||0,void 0!==f?f:1,g||0,h||0,l||0,j||0,void 0!==i?i:1,o||0,m||0,n||0,p||0,void 0!==k?k:1);this.flat=Array(16);this.m33=new THREE.Matrix3};
 THREE.Matrix4.prototype={constructor:THREE.Matrix4,set:function(a,b,c,d,e,f,g,h,l,j,i,o,m,n,p,k){this.n11=a;this.n12=b;this.n13=c;this.n14=d;this.n21=e;this.n22=f;this.n23=g;this.n24=h;this.n31=l;this.n32=j;this.n33=i;this.n34=o;this.n41=m;this.n42=n;this.n43=p;this.n44=k;return this},identity:function(){this.set(1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1);return this},copy:function(a){this.set(a.n11,a.n12,a.n13,a.n14,a.n21,a.n22,a.n23,a.n24,a.n31,a.n32,a.n33,a.n34,a.n41,a.n42,a.n43,a.n44);return this},lookAt:function(a,
diff --git a/build/custom/ThreeDOM.js b/build/custom/ThreeDOM.js
index b3c331bded..92482ce669 100644
--- a/build/custom/ThreeDOM.js
+++ b/build/custom/ThreeDOM.js
@@ -28,7 +28,7 @@ THREE.Face4&&(f=v.multiplyVector3(f.copy(y[b.a].position)),g=v.multiplyVector3(g
 THREE.Rectangle=function(){function a(){f=d-b;g=e-c}var b,c,d,e,f,g,h=!0;this.getX=function(){return b};this.getY=function(){return c};this.getWidth=function(){return f};this.getHeight=function(){return g};this.getLeft=function(){return b};this.getTop=function(){return c};this.getRight=function(){return d};this.getBottom=function(){return e};this.set=function(f,g,j,k){h=!1;b=f;c=g;d=j;e=k;a()};this.addPoint=function(f,g){h?(h=!1,b=f,c=g,d=f,e=g):(b=b<f?b:f,c=c<g?c:g,d=d>f?d:f,e=e>g?e:g);a()};this.add3Points=
 function(f,g,j,k,n,m){h?(h=!1,b=f<j?f<n?f:n:j<n?j:n,c=g<k?g<m?g:m:k<m?k:m,d=f>j?f>n?f:n:j>n?j:n,e=g>k?g>m?g:m:k>m?k:m):(b=f<j?f<n?f<b?f:b:n<b?n:b:j<n?j<b?j:b:n<b?n:b,c=g<k?g<m?g<c?g:c:m<c?m:c:k<m?k<c?k:c:m<c?m:c,d=f>j?f>n?f>d?f:d:n>d?n:d:j>n?j>d?j:d:n>d?n:d,e=g>k?g>m?g>e?g:e:m>e?m:e:k>m?k>e?k:e:m>e?m:e);a()};this.addRectangle=function(f){h?(h=!1,b=f.getLeft(),c=f.getTop(),d=f.getRight(),e=f.getBottom()):(b=b<f.getLeft()?b:f.getLeft(),c=c<f.getTop()?c:f.getTop(),d=d>f.getRight()?d:f.getRight(),e=e>
 f.getBottom()?e:f.getBottom());a()};this.inflate=function(f){b-=f;c-=f;d+=f;e+=f;a()};this.minSelf=function(f){b=b>f.getLeft()?b:f.getLeft();c=c>f.getTop()?c:f.getTop();d=d<f.getRight()?d:f.getRight();e=e<f.getBottom()?e:f.getBottom();a()};this.intersects=function(a){return d<a.getLeft()||b>a.getRight()||e<a.getTop()||c>a.getBottom()?!1:!0};this.empty=function(){h=!0;e=d=c=b=0;a()};this.isEmpty=function(){return h}};
-THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,e){return d+(a-b)*(e-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())}};THREE.Matrix3=function(){this.m=[]};
+THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,e){return d+(a-b)*(e-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())},sign:function(a){return 0>a?-1:0<a?1:0}};THREE.Matrix3=function(){this.m=[]};
 THREE.Matrix3.prototype={constructor:THREE.Matrix3,transpose:function(){var a,b=this.m;a=b[1];b[1]=b[3];b[3]=a;a=b[2];b[2]=b[6];b[6]=a;a=b[5];b[5]=b[7];b[7]=a;return this},transposeIntoArray:function(a){var b=this.m;a[0]=b[0];a[1]=b[3];a[2]=b[6];a[3]=b[1];a[4]=b[4];a[5]=b[7];a[6]=b[2];a[7]=b[5];a[8]=b[8];return this}};
 THREE.Matrix4=function(a,b,c,d,e,f,g,h,l,i,j,k,n,m,q,o){this.set(void 0!==a?a:1,b||0,c||0,d||0,e||0,void 0!==f?f:1,g||0,h||0,l||0,i||0,void 0!==j?j:1,k||0,n||0,m||0,q||0,void 0!==o?o:1);this.flat=Array(16);this.m33=new THREE.Matrix3};
 THREE.Matrix4.prototype={constructor:THREE.Matrix4,set:function(a,b,c,d,e,f,g,h,l,i,j,k,n,m,q,o){this.n11=a;this.n12=b;this.n13=c;this.n14=d;this.n21=e;this.n22=f;this.n23=g;this.n24=h;this.n31=l;this.n32=i;this.n33=j;this.n34=k;this.n41=n;this.n42=m;this.n43=q;this.n44=o;return this},identity:function(){this.set(1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1);return this},copy:function(a){this.set(a.n11,a.n12,a.n13,a.n14,a.n21,a.n22,a.n23,a.n24,a.n31,a.n32,a.n33,a.n34,a.n41,a.n42,a.n43,a.n44);return this},lookAt:function(a,
diff --git a/build/custom/ThreeSVG.js b/build/custom/ThreeSVG.js
index bfa294cede..f5942ae79a 100644
--- a/build/custom/ThreeSVG.js
+++ b/build/custom/ThreeSVG.js
@@ -28,7 +28,7 @@ THREE.Face4&&(f=r.multiplyVector3(f.copy(s[b.a].position)),g=r.multiplyVector3(g
 THREE.Rectangle=function(){function a(){f=d-b;g=e-c}var b,c,d,e,f,g,h=!0;this.getX=function(){return b};this.getY=function(){return c};this.getWidth=function(){return f};this.getHeight=function(){return g};this.getLeft=function(){return b};this.getTop=function(){return c};this.getRight=function(){return d};this.getBottom=function(){return e};this.set=function(f,g,j,m){h=!1;b=f;c=g;d=j;e=m;a()};this.addPoint=function(f,g){h?(h=!1,b=f,c=g,d=f,e=g):(b=b<f?b:f,c=c<g?c:g,d=d>f?d:f,e=e>g?e:g);a()};this.add3Points=
 function(f,g,j,m,n,l){h?(h=!1,b=f<j?f<n?f:n:j<n?j:n,c=g<m?g<l?g:l:m<l?m:l,d=f>j?f>n?f:n:j>n?j:n,e=g>m?g>l?g:l:m>l?m:l):(b=f<j?f<n?f<b?f:b:n<b?n:b:j<n?j<b?j:b:n<b?n:b,c=g<m?g<l?g<c?g:c:l<c?l:c:m<l?m<c?m:c:l<c?l:c,d=f>j?f>n?f>d?f:d:n>d?n:d:j>n?j>d?j:d:n>d?n:d,e=g>m?g>l?g>e?g:e:l>e?l:e:m>l?m>e?m:e:l>e?l:e);a()};this.addRectangle=function(f){h?(h=!1,b=f.getLeft(),c=f.getTop(),d=f.getRight(),e=f.getBottom()):(b=b<f.getLeft()?b:f.getLeft(),c=c<f.getTop()?c:f.getTop(),d=d>f.getRight()?d:f.getRight(),e=e>
 f.getBottom()?e:f.getBottom());a()};this.inflate=function(f){b-=f;c-=f;d+=f;e+=f;a()};this.minSelf=function(f){b=b>f.getLeft()?b:f.getLeft();c=c>f.getTop()?c:f.getTop();d=d<f.getRight()?d:f.getRight();e=e<f.getBottom()?e:f.getBottom();a()};this.intersects=function(a){return d<a.getLeft()||b>a.getRight()||e<a.getTop()||c>a.getBottom()?!1:!0};this.empty=function(){h=!0;e=d=c=b=0;a()};this.isEmpty=function(){return h}};
-THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,e){return d+(a-b)*(e-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())}};THREE.Matrix3=function(){this.m=[]};
+THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,e){return d+(a-b)*(e-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())},sign:function(a){return 0>a?-1:0<a?1:0}};THREE.Matrix3=function(){this.m=[]};
 THREE.Matrix3.prototype={constructor:THREE.Matrix3,transpose:function(){var a,b=this.m;a=b[1];b[1]=b[3];b[3]=a;a=b[2];b[2]=b[6];b[6]=a;a=b[5];b[5]=b[7];b[7]=a;return this},transposeIntoArray:function(a){var b=this.m;a[0]=b[0];a[1]=b[3];a[2]=b[6];a[3]=b[1];a[4]=b[4];a[5]=b[7];a[6]=b[2];a[7]=b[5];a[8]=b[8];return this}};
 THREE.Matrix4=function(a,b,c,d,e,f,g,h,k,i,j,m,n,l,p,o){this.set(void 0!==a?a:1,b||0,c||0,d||0,e||0,void 0!==f?f:1,g||0,h||0,k||0,i||0,void 0!==j?j:1,m||0,n||0,l||0,p||0,void 0!==o?o:1);this.flat=Array(16);this.m33=new THREE.Matrix3};
 THREE.Matrix4.prototype={constructor:THREE.Matrix4,set:function(a,b,c,d,e,f,g,h,k,i,j,m,n,l,p,o){this.n11=a;this.n12=b;this.n13=c;this.n14=d;this.n21=e;this.n22=f;this.n23=g;this.n24=h;this.n31=k;this.n32=i;this.n33=j;this.n34=m;this.n41=n;this.n42=l;this.n43=p;this.n44=o;return this},identity:function(){this.set(1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1);return this},copy:function(a){this.set(a.n11,a.n12,a.n13,a.n14,a.n21,a.n22,a.n23,a.n24,a.n31,a.n32,a.n33,a.n34,a.n41,a.n42,a.n43,a.n44);return this},lookAt:function(a,
diff --git a/build/custom/ThreeWebGL.js b/build/custom/ThreeWebGL.js
index 7e2feebaca..3081f32860 100644
--- a/build/custom/ThreeWebGL.js
+++ b/build/custom/ThreeWebGL.js
@@ -28,7 +28,7 @@ THREE.Face4&&(g=A.multiplyVector3(g.copy(x[b.a].position)),h=A.multiplyVector3(h
 THREE.Rectangle=function(){function a(){g=d-b;h=e-c}var b,c,d,e,g,h,i=!0;this.getX=function(){return b};this.getY=function(){return c};this.getWidth=function(){return g};this.getHeight=function(){return h};this.getLeft=function(){return b};this.getTop=function(){return c};this.getRight=function(){return d};this.getBottom=function(){return e};this.set=function(g,h,j,n){i=!1;b=g;c=h;d=j;e=n;a()};this.addPoint=function(g,h){i?(i=!1,b=g,c=h,d=g,e=h):(b=b<g?b:g,c=c<h?c:h,d=d>g?d:g,e=e>h?e:h);a()};this.add3Points=
 function(g,h,j,n,l,r){i?(i=!1,b=g<j?g<l?g:l:j<l?j:l,c=h<n?h<r?h:r:n<r?n:r,d=g>j?g>l?g:l:j>l?j:l,e=h>n?h>r?h:r:n>r?n:r):(b=g<j?g<l?g<b?g:b:l<b?l:b:j<l?j<b?j:b:l<b?l:b,c=h<n?h<r?h<c?h:c:r<c?r:c:n<r?n<c?n:c:r<c?r:c,d=g>j?g>l?g>d?g:d:l>d?l:d:j>l?j>d?j:d:l>d?l:d,e=h>n?h>r?h>e?h:e:r>e?r:e:n>r?n>e?n:e:r>e?r:e);a()};this.addRectangle=function(g){i?(i=!1,b=g.getLeft(),c=g.getTop(),d=g.getRight(),e=g.getBottom()):(b=b<g.getLeft()?b:g.getLeft(),c=c<g.getTop()?c:g.getTop(),d=d>g.getRight()?d:g.getRight(),e=e>
 g.getBottom()?e:g.getBottom());a()};this.inflate=function(g){b-=g;c-=g;d+=g;e+=g;a()};this.minSelf=function(g){b=b>g.getLeft()?b:g.getLeft();c=c>g.getTop()?c:g.getTop();d=d<g.getRight()?d:g.getRight();e=e<g.getBottom()?e:g.getBottom();a()};this.intersects=function(a){return d<a.getLeft()||b>a.getRight()||e<a.getTop()||c>a.getBottom()?!1:!0};this.empty=function(){i=!0;e=d=c=b=0;a()};this.isEmpty=function(){return i}};
-THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,e){return d+(a-b)*(e-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())}};THREE.Matrix3=function(){this.m=[]};
+THREE.Math={clamp:function(a,b,c){return a<b?b:a>c?c:a},clampBottom:function(a,b){return a<b?b:a},mapLinear:function(a,b,c,d,e){return d+(a-b)*(e-d)/(c-b)},random16:function(){return(65280*Math.random()+255*Math.random())/65535},randInt:function(a,b){return a+Math.floor(Math.random()*(b-a+1))},randFloat:function(a,b){return a+Math.random()*(b-a)},randFloatSpread:function(a){return a*(0.5-Math.random())},sign:function(a){return 0>a?-1:0<a?1:0}};THREE.Matrix3=function(){this.m=[]};
 THREE.Matrix3.prototype={constructor:THREE.Matrix3,transpose:function(){var a,b=this.m;a=b[1];b[1]=b[3];b[3]=a;a=b[2];b[2]=b[6];b[6]=a;a=b[5];b[5]=b[7];b[7]=a;return this},transposeIntoArray:function(a){var b=this.m;a[0]=b[0];a[1]=b[3];a[2]=b[6];a[3]=b[1];a[4]=b[4];a[5]=b[7];a[6]=b[2];a[7]=b[5];a[8]=b[8];return this}};
 THREE.Matrix4=function(a,b,c,d,e,g,h,i,m,k,j,n,l,r,o,p){this.set(void 0!==a?a:1,b||0,c||0,d||0,e||0,void 0!==g?g:1,h||0,i||0,m||0,k||0,void 0!==j?j:1,n||0,l||0,r||0,o||0,void 0!==p?p:1);this.flat=Array(16);this.m33=new THREE.Matrix3};
 THREE.Matrix4.prototype={constructor:THREE.Matrix4,set:function(a,b,c,d,e,g,h,i,m,k,j,n,l,r,o,p){this.n11=a;this.n12=b;this.n13=c;this.n14=d;this.n21=e;this.n22=g;this.n23=h;this.n24=i;this.n31=m;this.n32=k;this.n33=j;this.n34=n;this.n41=l;this.n42=r;this.n43=o;this.n44=p;return this},identity:function(){this.set(1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1);return this},copy:function(a){this.set(a.n11,a.n12,a.n13,a.n14,a.n21,a.n22,a.n23,a.n24,a.n31,a.n32,a.n33,a.n34,a.n41,a.n42,a.n43,a.n44);return this},lookAt:function(a,
diff --git a/src/core/Math.js b/src/core/Math.js
index f0c7543121..7895290752 100644
--- a/src/core/Math.js
+++ b/src/core/Math.js
@@ -59,6 +59,12 @@ THREE.Math = {
 
 		return range * ( 0.5 - Math.random() );
 
+	},
+
+	sign: function ( x ) {
+
+		return ( x < 0 ) ? -1 : ( ( x > 0 ) ? 1 : 0 );
+
 	}
 
 };
-- 
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