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b[0]=(h*D-i*C+j*B)*E,b[1]=(-d*D+e*C-f*B)*E,b[2]=(p*x-q*w+r*v)*E,b[3]=(-l*x+m*w-n*v)*E,b[4]=(-g*D+i*A-j*z)*E,b[5]=(c*D-e*A+f*z)*E,b[6]=(-o*x+q*u-r*t)*E,b[7]=(k*x-m*u+n*t)*E,b[8]=(g*C-h*A+j*y)*E,b[9]=(-c*C+d*A-f*y)*E,b[10]=(o*w-p*u+r*s)*E,b[11]=(-k*w+l*u-n*s)*E,b[12]=(-g*B+h*z-i*y)*E,b[13]=(c*B-d*z+e*y)*E,b[14]=(-o*v+p*t-q*s)*E,b[15]=(k*v-l*t+m*s)*E,b},mat4.toRotationMat=function(a,b){return b||(b=mat4.create()),b[0]=a[0],b[1]=a[1],b[2]=a[2],b[3]=a[3],b[4]=a[4],b[5]=a[5],b[6]=a[6],b[7]=a[7],b[8]=a[8],b[9]=a[9],b[10]=a[10],b[11]=a[11],b[12]=0,b[13]=0,b[14]=0,b[15]=1,b},mat4.toMat3=function(a,b){return b||(b=mat3.create()),b[0]=a[0],b[1]=a[1],b[2]=a[2],b[3]=a[4],b[4]=a[5],b[5]=a[6],b[6]=a[8],b[7]=a[9],b[8]=a[10],b},mat4.toInverseMat3=function(a,b){var c=a[0],d=a[1],e=a[2],f=a[4],g=a[5],h=a[6],i=a[8],j=a[9],k=a[10],l=k*g-h*j,m=-k*f+h*i,n=j*f-g*i,o=c*l+d*m+e*n;if(!o)return null;var p=1/o;return b||(b=mat3.create()),b[0]=l*p,b[1]=(-k*d+e*j)*p,b[2]=(h*d-e*g)*p,b[3]=m*p,b[4]=(k*c-e*i)*p,b[5]=(-h*c+e*f)*p,b[6]=n*p,b[7]=(-j*c+d*i)*p,b[8]=(g*c-d*f)*p,b},mat4.multiply=function(a,b,c){c||(c=a);var d=a[0],e=a[1],f=a[2],g=a[3],h=a[4],i=a[5],j=a[6],k=a[7],l=a[8],m=a[9],n=a[10],o=a[11],p=a[12],q=a[13],r=a[14],s=a[15],t=b[0],u=b[1],v=b[2],w=b[3],x=b[4],y=b[5],z=b[6],A=b[7],B=b[8],C=b[9],D=b[10],E=b[11],F=b[12],G=b[13],H=b[14],I=b[15];return c[0]=t*d+u*h+v*l+w*p,c[1]=t*e+u*i+v*m+w*q,c[2]=t*f+u*j+v*n+w*r,c[3]=t*g+u*k+v*o+w*s,c[4]=x*d+y*h+z*l+A*p,c[5]=x*e+y*i+z*m+A*q,c[6]=x*f+y*j+z*n+A*r,c[7]=x*g+y*k+z*o+A*s,c[8]=B*d+C*h+D*l+E*p,c[9]=B*e+C*i+D*m+E*q,c[10]=B*f+C*j+D*n+E*r,c[11]=B*g+C*k+D*o+E*s,c[12]=F*d+G*h+H*l+I*p,c[13]=F*e+G*i+H*m+I*q,c[14]=F*f+G*j+H*n+I*r,c[15]=F*g+G*k+H*o+I*s,c},mat4.multiplyVec3=function(a,b,c){c||(c=b);var d=b[0],e=b[1],f=b[2];return c[0]=a[0]*d+a[4]*e+a[8]*f+a[12],c[1]=a[1]*d+a[5]*e+a[9]*f+a[13],c[2]=a[2]*d+a[6]*e+a[10]*f+a[14],c},mat4.multiplyVec4=function(a,b,c){c||(c=b);var d=b[0],e=b[1],f=b[2],g=b[3];return c[0]=a[0]*d+a[4]*e+a[8]*f+a[12]*g,c[1]=a[1]*d+a[5]*e+a[9]*f+a[13]*g,c[2]=a[2]*d+a[6]*e+a[10]*f+a[14]*g,c[3]=a[3]*d+a[7]*e+a[11]*f+a[15]*g,c},mat4.translate=function(a,b,c){var d=b[0],e=b[1],f=b[2];if(!c||a==c)return a[12]=a[0]*d+a[4]*e+a[8]*f+a[12],a[13]=a[1]*d+a[5]*e+a[9]*f+a[13],a[14]=a[2]*d+a[6]*e+a[10]*f+a[14],a[15]=a[3]*d+a[7]*e+a[11]*f+a[15],a;var g=a[0],h=a[1],i=a[2],j=a[3],k=a[4],l=a[5],m=a[6],n=a[7],o=a[8],p=a[9],q=a[10],r=a[11];return c[0]=g,c[1]=h,c[2]=i,c[3]=j,c[4]=k,c[5]=l,c[6]=m,c[7]=n,c[8]=o,c[9]=p,c[10]=q,c[11]=r,c[12]=g*d+k*e+o*f+a[12],c[13]=h*d+l*e+p*f+a[13],c[14]=i*d+m*e+q*f+a[14],c[15]=j*d+n*e+r*f+a[15],c},mat4.scale=function(a,b,c){var d=b[0],e=b[1],f=b[2];return!c||a==c?(a[0]*=d,a[1]*=d,a[2]*=d,a[3]*=d,a[4]*=e,a[5]*=e,a[6]*=e,a[7]*=e,a[8]*=f,a[9]*=f,a[10]*=f,a[11]*=f,a):(c[0]=a[0]*d,c[1]=a[1]*d,c[2]=a[2]*d,c[3]=a[3]*d,c[4]=a[4]*e,c[5]=a[5]*e,c[6]=a[6]*e,c[7]=a[7]*e,c[8]=a[8]*f,c[9]=a[9]*f,c[10]=a[10]*f,c[11]=a[11]*f,c[12]=a[12],c[13]=a[13],c[14]=a[14],c[15]=a[15],c)},mat4.rotate=function(a,b,c,d){var e=c[0],f=c[1],g=c[2],h=Math.sqrt(e*e+f*f+g*g);if(!h)return null;h!=1&&(h=1/h,e*=h,f*=h,g*=h);var i=Math.sin(b),j=Math.cos(b),k=1-j,l=a[0],m=a[1],n=a[2],o=a[3],p=a[4],q=a[5],r=a[6],s=a[7],t=a[8],u=a[9],v=a[10],w=a[11],x=e*e*k+j,y=f*e*k+g*i,z=g*e*k-f*i,A=e*f*k-g*i,B=f*f*k+j,C=g*f*k+e*i,D=e*g*k+f*i,E=f*g*k-e*i,F=g*g*k+j;return d?a!=d&&(d[12]=a[12],d[13]=a[13],d[14]=a[14],d[15]=a[15]):d=a,d[0]=l*x+p*y+t*z,d[1]=m*x+q*y+u*z,d[2]=n*x+r*y+v*z,d[3]=o*x+s*y+w*z,d[4]=l*A+p*B+t*C,d[5]=m*A+q*B+u*C,d[6]=n*A+r*B+v*C,d[7]=o*A+s*B+w*C,d[8]=l*D+p*E+t*F,d[9]=m*D+q*E+u*F,d[10]=n*D+r*E+v*F,d[11]=o*D+s*E+w*F,d},mat4.rotateX=function(a,b,c){var d=Math.sin(b),e=Math.cos(b),f=a[4],g=a[5],h=a[6],i=a[7],j=a[8],k=a[9],l=a[10],m=a[11];return c?a!=c&&(c[0]=a[0],c[1]=a[1],c[2]=a[2],c[3]=a[3],c[12]=a[12],c[13]=a[13],c[14]=a[14],c[15]=a[15]):c=a,c[4]=f*e+j*d,c[5]=g*e+k*d,c[6]=h*e+l*d,c[7]=i*e+m*d,c[8]=f*-d+j*e,c[9]=g*-d+k*e,c[10]=h*-d+l*e,c[11]=i*-d+m*e,c},mat4.rotateY=function(a,b,c){var d=Math.sin(b),e=Math.cos(b),f=a[0],g=a[1],h=a[2],i=a[3],j=a[8],k=a[9],l=a[10],m=a[11];return c?a!=c&&(c[4]=a[4],c[5]=a[5],c[6]=a[6],c[7]=a[7],c[12]=a[12],c[13]=a[13],c[14]=a[14],c[15]=a[15]):c=a,c[0]=f*e+j*-d,c[1]=g*e+k*-d,c[2]=h*e+l*-d,c[3]=i*e+m*-d,c[8]=f*d+j*e,c[9]=g*d+k*e,c[10]=h*d+l*e,c[11]=i*d+m*e,c},mat4.rotateZ=function(a,b,c){var d=Math.sin(b),e=Math.cos(b),f=a[0],g=a[1],h=a[2],i=a[3],j=a[4],k=a[5],l=a[6],m=a[7];return c?a!=c&&(c[8]=a[8],c[9]=a[9],c[10]=a[10],c[11]=a[11],c[12]=a[12],c[13]=a[13],c[14]=a[14],c[15]=a[15]):c=a,c[0]=f*e+j*d,c[1]=g*e+k*d,c[2]=h*e+l*d,c[3]=i*e+m*d,c[4]=f*-d+j*e,c[5]=g*-d+k*e,c[6]=h*-d+l*e,c[7]=i*-d+m*e,c},mat4.frustum=function(a,b,c,d,e,f,g){g||(g=mat4.create());var h=b-a,i=d-c,j=f-e;return g[0]=e*2/h,g[1]=0,g[2]=0,g[3]=0,g[4]=0,g[5]=e*2/i,g[6]=0,g[7]=0,g[8]=(b+a)/h,g[9]=(d+c)/i,g[10]=-(f+e)/j,g[11]=-1,g[12]=0,g[13]=0,g[14]=-(f*e*2)/j,g[15]=0,g},mat4.perspective=function(a,b,c,d,e){var f=c*Math.tan(a*Math.PI/360),g=f*b;return mat4.frustum(-g,g,-f,f,c,d,e)},mat4.ortho=function(a,b,c,d,e,f,g){g||(g=mat4.create());var h=b-a,i=d-c,j=f-e;return g[0]=2/h,g[1]=0,g[2]=0,g[3]=0,g[4]=0,g[5]=2/i,g[6]=0,g[7]=0,g[8]=0,g[9]=0,g[10]=-2/j,g[11]=0,g[12]=-(a+b)/h,g[13]=-(d+c)/i,g[14]=-(f+e)/j,g[15]=1,g},mat4.lookAt=function(a,b,c,d){d||(d=mat4.create());var e=a[0],f=a[1],g=a[2],h=c[0],i=c[1],j=c[2],k=b[0],l=b[1],m=b[2];if(e==k&&f==l&&g==m)return mat4.identity(d);var n,o,p,q,r,s,t,u,v,w;return n=e-b[0],o=f-b[1],p=g-b[2],w=1/Math.sqrt(n*n+o*o+p*p),n*=w,o*=w,p*=w,q=i*p-j*o,r=j*n-h*p,s=h*o-i*n,w=Math.sqrt(q*q+r*r+s*s),w?(w=1/w,q*=w,r*=w,s*=w):(q=0,r=0,s=0),t=o*s-p*r,u=p*q-n*s,v=n*r-o*q,w=Math.sqrt(t*t+u*u+v*v),w?(w=1/w,t*=w,u*=w,v*=w):(t=0,u=0,v=0),d[0]=q,d[1]=t,d[2]=n,d[3]=0,d[4]=r,d[5]=u,d[6]=o,d[7]=0,d[8]=s,d[9]=v,d[10]=p,d[11]=0,d[12]=-(q*e+r*f+s*g),d[13]=-(t*e+u*f+v*g),d[14]=-(n*e+o*f+p*g),d[15]=1,d},mat4.str=function(a){return"["+a[0]+", "+a[1]+", "+a[2]+", "+a[3]+", "+a[4]+", "+a[5]+", "+a[6]+", "+a[7]+", "+a[8]+", "+a[9]+", "+a[10]+", "+a[11]+", "+a[12]+", "+a[13]+", "+a[14]+", "+a[15]+"]"},quat4={},quat4.create=function(a){var b=new glMatrixArrayType(4);return a&&(b[0]=a[0],b[1]=a[1],b[2]=a[2],b[3]=a[3]),b},quat4.set=function(a,b){return b[0]=a[0],b[1]=a[1],b[2]=a[2],b[3]=a[3],b},quat4.calculateW=function(a,b){var c=a[0],d=a[1],e=a[2];return!b||a==b?(a[3]=-Math.sqrt(Math.abs(1-c*c-d*d-e*e)),a):(b[0]=c,b[1]=d,b[2]=e,b[3]=-Math.sqrt(Math.abs(1-c*c-d*d-e*e)),b)},quat4.inverse=function(a,b){return!b||a==b?(a[0]*=-1,a[1]*=-1,a[2]*=-1,a):(b[0]=-a[0],b[1]=-a[1],b[2]=-a[2],b[3]=a[3],b)},quat4.length=function(a){var b=a[0],c=a[1],d=a[2],e=a[3];return Math.sqrt(b*b+c*c+d*d+e*e)},quat4.normalize=function(a,b){b||(b=a);var c=a[0],d=a[1],e=a[2],f=a[3],g=Math.sqrt(c*c+d*d+e*e+f*f);return g==0?(b[0]=0,b[1]=0,b[2]=0,b[3]=0,b):(g=1/g,b[0]=c*g,b[1]=d*g,b[2]=e*g,b[3]=f*g,b)},quat4.multiply=function(a,b,c){c||(c=a);var d=a[0],e=a[1],f=a[2],g=a[3],h=b[0],i=b[1],j=b[2],k=b[3];return c[0]=d*k+g*h+e*j-f*i,c[1]=e*k+g*i+f*h-d*j,c[2]=f*k+g*j+d*i-e*h,c[3]=g*k-d*h-e*i-f*j,c},quat4.multiplyVec3=function(a,b,c){c||(c=b);var d=b[0],e=b[1],f=b[2],g=a[0],h=a[1],i=a[2],j=a[3],k=j*d+h*f-i*e,l=j*e+i*d-g*f,m=j*f+g*e-h*d,n=-g*d-h*e-i*f;return c[0]=k*j+n*-g+l*-i-m*-h,c[1]=l*j+n*-h+m*-g-k*-i,c[2]=m*j+n*-i+k*-h-l*-g,c},quat4.toMat3=function(a,b){b||(b=mat3.create());var c=a[0],d=a[1],e=a[2],f=a[3],g=c+c,h=d+d,i=e+e,j=c*g,k=c*h,l=c*i,m=d*h,n=d*i,o=e*i,p=f*g,q=f*h,r=f*i;return b[0]=1-(m+o),b[1]=k-r,b[2]=l+q,b[3]=k+r,b[4]=1-(j+o),b[5]=n-p,b[6]=l-q,b[7]=n+p,b[8]=1-(j+m),b},quat4.toMat4=function(a,b){b||(b=mat4.create());var c=a[0],d=a[1],e=a[2],f=a[3],g=c+c,h=d+d,i=e+e,j=c*g,k=c*h,l=c*i,m=d*h,n=d*i,o=e*i,p=f*g,q=f*h,r=f*i;return b[0]=1-(m+o),b[1]=k-r,b[2]=l+q,b[3]=0,b[4]=k+r,b[5]=1-(j+o),b[6]=n-p,b[7]=0,b[8]=l-q,b[9]=n+p,b[10]=1-(j+m),b[11]=0,b[12]=0,b[13]=0,b[14]=0,b[15]=1,b},quat4.slerp=function(a,b,c,d){d||(d=a);var e=a[0]*b[0]+a[1]*b[1]+a[2]*b[2]+a[3]*b[3];if(Math.abs(e)>=1)return d!=a&&(d[0]=a[0],d[1]=a[1],d[2]=a[2],d[3]=a[3]),d;var f=Math.acos(e),g=Math.sqrt(1-e*e);if(Math.abs(g)<.001)return d[0]=a[0]*.5+b[0]*.5,d[1]=a[1]*.5+b[1]*.5,d[2]=a[2]*.5+b[2]*.5,d[3]=a[3]*.5+b[3]*.5,d;var 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this.__visible},set:function(a){if(this.__visible==a)return;this.__visible=a,this.__graph.changed=!0}}),Object.defineProperty(h.prototype,"__data",{enumerable:!1,writable:!0,value:0}),Object.defineProperty(h.prototype,"data",{enumerable:!0,get:function(){return this.options.data},set:function(a){this.options.data=[],this.plot(a)}});var j={graph:f,series:i};Export(j)}(),function(){"use strict";var a={red:vec(1,0,0),green:vec(0,1,0),blue:vec(0,0,1),yellow:vec(1,1,0),orange:vec(1,.6,0),cyan:vec(0,1,1),magenta:vec(1,0,1),white:vec(1,1,1),black:vec(0,0,0),gray:function(a){return vec(a,a,a)},hsv_to_rgb:function(a){var b=a.x,c=a.y,d=a.z;if(c==0)return vec(d,d,d);var e=Math.floor(6*b),f=6*b-e,g=d*(1-c),h=d*(1-c*f),i=d*(1-c*(1-f)),e=e%6;switch(e){case 0:return vec(d,i,g);case 1:return vec(h,d,g);case 2:return vec(g,d,i);case 3:return vec(g,h,d);case 4

:return vec(i,g,d);case 5:return vec(d,g,h)}},rgb_to_hsv:function(a){var b=a.x,c=a.y,d=a.z,e=Math.max(b,c,d),f=Math.min(b,c,d),g=e;if(f==e)return vec(0,0,g);var h=(e-f)/e,i=(e-b)/(e-f),j=(e-c)/(e-f),k=(e-d)/(e-f),l;return b==e?l=k-j:c==e?l=2+i-k:l=4+j-i,l=l/6,l<0&&l++,vec(l,h,g)},to_html:function(a){var b=Math.floor(255*a.x),c=Math.floor(255*a.y),d=Math.floor(255*a.z);return"rgb("+b+","+c+","+d+")"},to_html_rgba:function(a,b){var c=Math.floor(255*a.x),d=Math.floor(255*a.y),e=Math.floor(255*a.z);return"rgba("+c+","+d+","+e+","+b+")"}},b={color:a};Export(b)}(),function(){function subclass(a,b){a.prototype=new b({visible:!1,canvas:null}),a.prototype.constructor=a}function id_to_falsecolor(a){var b=0,c=0,d=0;return a>=16777216&&(b=Math.floor(a/16777216),a-=b*16777216),a>=65536&&(c=Math.floor(a/65536),a-=c*65536),a>=256&&(d=Math.floor(a/256),a-=d*256),[b/255,c/255,d/255,a/255]}function init(a,b){b.canvas!==undefined?(a.canvas=b.canvas,delete b.canvas):a.canvas=canvas.selected,a.canvas&&(a.canvas.__activate(),a.__model=a.canvas.__renderer.models[a.constructor.name]);for(var c in b)a[c]=b[c];b.visible===undefined&&a.canvas!==null&&(a.visible=!0)}function initObject(a,b,c){if(a instanceof b)c===undefined&&(c={}),a.__tex={file:null,bumpmap:null,texture_ref:{reference:null},bumpmap_ref:{reference:null},left:!1,right:!1,sides:!1,flipx:!1,flipy:!1,turn:0,flags:0},c.pos===undefined&&(a.pos=a.pos),c.color===undefined&&(a.color=a.color),c.axis===undefined&&(a.axis=a.axis),c.up===undefined&&(a.up=a.up),c.size===undefined&&(a.size=a.size),init(a,c);else return new b(c)}function setup_texture(a,b,c){a.slice(0,1)==":"&&(a="images/"+a.slice(1)),b.canvas.__renderer.initTexture(a,b,c)}function Primitive(){}function box(a){return initObject(this,box,a)}function cylinder(a){return initObject(this,cylinder,a)}function cone(a){return initObject(this,cone,a)}function pyramid(a){return initObject(this,pyramid,a)}function sphere(a){return initObject(this,sphere,a)}function arrow(a){return initObject(this,arrow,a)}function curve(a){if(!(this instanceof curve))return new curve(a);a=a||{};if(a.texture!==undefined)throw new Error("Textures are not available for curve objects.");this.points=[],this.color=this.color,init(this,a),this.radius||(this.radius=.001*this.canvas.__range)}function point(a){if(!(this instanceof point))return new point(a);a instanceof vec&&(a={pos:a});for(var b in a)this[b]=a[b];if(this.pos===undefined)throw new Error("Must specify pos for a point on a curve")}function helix(a){return initObject(this,helix,a)}function ring(a){return initObject(this,ring,a)}function distant_light(a){if(!(this instanceof distant_light))return new distant_light(a);if(a.direction===undefined)throw new Error("Must specify the distant_light direction as {direction:..}");init(this,a),this.canvas.lights.push(this)}function local_light(a){if(!(this instanceof local_light))return new local_light(a);if(a.pos===undefined)throw new Error("Must specify the local_light position as {pos:..}");init(this,a),this.canvas.lights.push(this)}function draw(a){if(this instanceof draw)a=a||{},this.points=[],init(this,a),this.canvas.__overlay_objects.objects.push(this);else return new draw(a)}function label(a){if(this instanceof label)a=a||{},this.pos=this.pos,this.color=this.color,init(this,a),this.canvas.__overlay_objects.objects.push(this);else return new label(a)}function compound(a,b){if(!(this instanceof compound))return new compound(a,b);var c=b.visible===undefined?!0:b.visible;b.visible=!1,init(this,compound,b);var d=this.__model,e=new d.Mesh;for(var f=0;f<a.length;f++){var g=a[f];g.visible=!1,e.merge(g.getTransformedMesh())}this.__model=d(e),this.visible=c;var h=function(a){return this instanceof h?(this.__id=null,initObject(this,h,a)):new h(a)};h.prototype=this,h.prototype.constructor=h,this.clone=h}function attach_trail(a,b){if(!(this instanceof attach_trail))return new attach_trail(a,b);b===undefined&&(b={}),b.canvas===undefined&&(b.canvas=canvas.selected,typeof a!="function"&&(b.canvas=a.canvas));if(b.type===undefined)this.type="curve";else switch(b.type){case"curve":this.type=b.type,delete b.type;break;case"spheres":this.type=b.type,delete b.type,b.pickable=!1;break;default:throw new Error("attach_trail type must be 'curve' or 'spheres'")}this.retain=-1,b.retain!==undefined&&(this.retain=b.retain,delete b.retain),this.pps=0,b.pps!==undefined&&(this.pps=b.pps,delete b.pps);var c;this.obj=a,typeof a!="function"?(b.color===undefined&&(b.color=a.color),b.radius===undefined?c=.05*a.size.y:(c=b.radius,delete b.radius)):b.radius===undefined?c=.001*b.canvas.range:(c=b.radius,delete b.radius),this.type=="curve"?b.radius=c:b.size=vec(2*c,2*c,2*c),b.pickable=!1,this.options=b;var d=b.canvas;this.type=="curve"?this.curve=curve(this.options):this.spheres=[],this.last_pos=null,this.last_time=null,this.run=!0,this.elements=0,d.trails.push(this),this.start=function(){this.run=!0,this.type==="curve"&&(this.curve=curve(this.options))},this.stop=function(){this.run=!1},this.clear=function(){if(this.type=="curve")this.curve.clear();else{var a=this.spheres;for(var b=0;b<a.length;b++)a[b].visible=!1;this.spheres=[]}}}function attach_arrow(a,b,c){if(!(this instanceof attach_arrow))return new attach_arrow(a,b,c);c===undefined&&(c={}),c.canvas===undefined&&(c.canvas=a.canvas),this.obj=a,this.attr=b,this.scale=1,c.scale!==undefined&&(this.scale=c.scale,delete c.scale),c.color===undefined&&(c.color=a.color),this.options=c;var d=c.canvas;this.arrow=arrow(this.options),this.arrow.visible=!1,this.arrow.pickable=!1,this.last_pos=null,this.run=!0,d.arrows.push(this),this.start=function(){this.arrow.visible=this.run=!0},this.stop=function(){this.arrow.visible=this.run=!1}}"use strict";var nextVisibleId=1,textures={flower:":flower_texture.jpg",granite:":granite_texture.jpg",gravel:":gravel_texture.jpg",metal:":metal_texture.jpg",rock:":rock_texture.jpg",rough:":rough_texture.jpg",rug:":rug_texture.jpg",stones:":stones_texture.jpg",stucco:":stucco_texture.jpg",wood:":wood_texture.jpg",wood_old:":wood_old_texture.jpg"},bumpmaps={gravel:":gravel_bumpmap.jpg",rock:":rock_bumpmap.jpg",stones:":stones_bumpmap.jpg",stucco:":stucco_bumpmap.jpg",wood_old:":wood_old_bumpmap.jpg"};property.declare(Primitive.prototype,{__id:null,__hasPosAtCenter:!1,__zx_camera:null,__zy_camera:null,__xmin:null,__ymin:null,__zmin:null,__xmax:null,__ymax:null,__zmax:null,pos:new attributeVector(null,0,0,0),color:new attributeVector(null,1,1,1),axis:new attributeVector(null,1,0,0),size:new attributeVector(null,1,1,1),up:new attributeVector(null,0,1,0),opacity:{value:1,onchanged:function(){this.__change()}},shininess:{value:.6,onchanged:function(){this.__change()}},emissive:{value:!1,onchanged:function(){this.__change()}},pickable:{value:!0,onchanged:function(){this.__change()}},ready:{get:function(){return this.__tex.file===null||this.__tex.texture_ref.reference!==null&&this.__tex.bumpmap===null||this.__tex.bumpmap_ref.reference!==null}},texture:{get:function(){return{file:this.__tex.file,bumpmap:this.__tex.bumpmap,left:this.__tex.left,right:this.__tex.right,sides:this.__tex.sides,flipx:this.__tex.flipx,flipy:this.__tex.flipy,turn:this.__tex.turn}},set:function(a){this.__tex={file:null,bumpmap:null,texture_ref:{reference:null},bumpmap_ref:{reference:null},left:!1,right:!1,sides:!1,flipx:!1,flipy:!1,turn:0,flags:0};if(a!==null)if(typeof a=="string")this.__tex.left=this.__tex.right=this.__tex.sides=!0,setup_texture(a,this,!1);else{if(a.file!==undefined&&typeof a.file=="string")setup_texture(a.file,this,!1);else throw new Error("You must specify a file name for a texture.");if(a.bumpmap!==undefined&&a.bumpmap!==null){if(typeof a.bumpmap!="string")throw new Error("You must specify a file name for a bumpmap.");setup_texture(a.bumpmap,this,!0)}a.flipx!==undefined&&(this.__tex.flipx=a.flipx),a.flipy!==undefined&&(this.__tex.flipy=a.flipy),a.turn!==undefined&&(this.__tex.turn=Math.round(a.turn));if(a.place!==undefined){typeof a.place=="string"&&(a.place=[a.place]);for(var b=0;b<a.place.length;b++)switch(a.place[b]){case"left":this.__tex.left=!0;break;case"right":this.__tex.right=!0;break;case"sides":this.__tex.sides=!0;break;case"ends":this.__tex.left=this.__tex.right=!0;break;case"all":this.__tex.left=this.__tex.right=this.__tex.sides=!0}}else this.__tex.left=this.__tex.right=this.__tex.sides=!0}this.__tex.flags=0,this.__tex.file!==null&&(this.__tex.flags+=1),this.__tex.bumpmap!==null&&(this.__tex.flags+=2),this.__tex.left&&(this.__tex.flags+=4),this.__tex.right&&(this.__tex.flags+=8),this.__tex.sides&&(this.__tex.flags+=16),this.__tex.flipx&&(this.__tex.flags+=32),this.__tex.flipy&&(this.__tex.flags+=64);var c=this.__tex.turn%4;c<0&&(c+=4),this.__tex.flags+=128*c,this.__change()}},visible:{get:function(){return this.__id!=null},set:function(a){if(a==(this.__id!=null))return;if(a)this.__id=nextVisibleId,nextVisibleId++,this.canvas.__visiblePrimitives[this.__id]=this,this.__falsecolor=id_to_falsecolor(this.__id),this.canvas.__changed[this.__id]=this;else{delete this.canvas.__visiblePrimitives[this.__id],delete this.canvas.__changed[this.__id],this.__model&&delete this.__model.id_object[this.__id];if(this.__components)for(var b=0;b<this.__components.length;b++)delete this.__components[b].__model.id_object[this.__components[b].__id];this.__id=null}}},__change:function(){this.__id&&(this.canvas.__changed[this.__id]=this)},__get_extent:function(a){Autoscale.find_extent(this,a)},__update:function(){var a=this.__pos,b=this.__size,c=this.__color,d=this.__axis,e=this.__up,f=this.__data;f||(this.__data=f=new Float32Array(20)),this.__model.id_object[this.__id]=this,f[0]=a.__x,f[1]=a.__y,f[2]=a.__z,f[3]=this.__shininess,f[4]=d.__x,f[5]=d.__y,f[6]=d.__z,f[7]=this.__emissive?1:0,f[8]=e.__x,f[9]=e.__y,f[10]=e.__z,f[11]=this.__tex.flags,f[12]=b.__x,f[13]=b.__y,f[14]=b.__z,f[16]=c.__x,f[17]=c.__y,f[18]=c.__z,f[19]=this.__opacity},rotate:function(a){if(a.angle===undefined)throw new Error("object.rotate() requires {angle:...}");var b=a.angle,c,d;a.axis===undefined?c=this.__axis:c=a.axis,a.origin===undefined?d=this.__pos:d=a.origin;var e=c.norm(),f=this.__up.norm(),g=e.cross(f).norm();g.dot(g)<1e-10&&(g=e.cross(vec(1,0,0)),g.dot(g)<1e-10&&(g=cross(e,vec(0,1,0))),f=g.cross(e)),this.pos=d.add(this.__pos.sub(d).rotate({angle:b,axis:c})),this.axis=this.__axis.rotate({angle:b,axis:c}),this.up=f.rotate({angle:b,axis:e})},getTransformedMesh:function(){var a=this.axis.norm(),b=a.cross(this.up.norm());b.mag2()<1e-10&&(b=a.cross(vec(1,0,0)),b.mag2()<1e-10&&(b=a.cross(vec(0,1,0)))),b=b.norm();var c=b.cross(a).norm();a=a.multiply(this.size.x),c=c.multiply(this.size.y),b=b.multiply(this.size.z);var d=this.pos,e=[a.x,a.y,a.z,0,c.x,c.y,c.z,0,b.x,b.y,b.z,0,d.x,d.y,d.z,1];return this.__model.mesh.transformed(e)}}),subclass(box,Primitive),box.prototype.__hasPosAtCenter=!0,subclass(cylinder,Primitive),subclass(cone,cylinder),subclass(pyramid,box),subclass(sphere,Primitive),sphere.prototype.__hasPosAtCenter=!0,subclass(arrow,Primitive),property.declare(arrow.prototype,{__primitiveCount:2,shaftwidth:0,headwidth:0,headlength:0,axis_and_length:{get:function(){return this.__axis.norm().multiply(this.__size.x)},set:function(a){this.axis=a,this.__size.x=a.mag()}},__update:function(){var a=this.__pos,b=this.__color,c=this.__axis,d=this.__size,e=this.__up,f=d.__x,g=c.norm(),h=this.__shaftwidth||f*.1,i=this.__headwidth||h*2,j=this.__headlength||h*3;if(h<f*.02){var k=f*.02/h;this.__shaftwidth||(h*=k),this.__headwidth||(i*=k),this.__headlength||(j*=k)}if(j>f*.5){var k=f*.5/j;this.__shaftwidth||(h*=k),this.__headwidth||(i*=k),this.__headlength||(j*=k)}var l=this.__components;if(!l){l=this.__components=[box({canvas:this.canvas,visible:0}),pyramid({canvas:this.canvas,visible:0})];for(var m=0;m<l.length;m++)l[m].__id=nextVisibleId++,l[m].__falsecolor=this.__falsecolor}var n=l[0],o=l[1];n.pos=a.add(g.multiply(.5*(f-j))),o.pos=a.add(g.multiply(f-j)),n.axis=o.axis=c,n.up=o.up=e,n.size=vec(f-j,h,h),o.size=vec(j,i,i),n.color=o.color=this.color,n.opacity=o.opacity=this.opacity,this.size=vec(f,i,i),n.__update(),o.__update()}}),property.declare(curve.prototype,{__id:null,radius:0,color:new attributeVector(null,1,1,1),__zx_camera:null,__zy_camera:null,__xmin:null,__ymin:null,__zmin:null,__xmax:null,__ymax:null,__zmax:null,pickable:!0,pick:null,visible:{get:function(){return this.__id!=null},set:function(a){if(a==(this.__id!=null))return;if(a)this.__id=nextVisibleId,nextVisibleId++,this.canvas.__visiblePrimitives[this.__id]=this,this.canvas.__changed[this.__id]=this;else{delete this.canvas.__visiblePrimitives[this.__id],delete this.canvas.__changed[this.__id],this.__model&&delete this.__model.id_object[this.__id];if(this.__components)for(var b=0;b<this.__components.length;b++)delete this.__components[b].__model.id_object[this.__components[b].__id];this.__id=null}}},__change:function(){this.__id&&(this.canvas.__changed[this.__id]=this)},__get_extent:function(a){for(var b=0;b<this.points.length;b++)a.point_extent(this,this.points[b].pos)},__update:function(){for(var a=0;a<this.points.length;a++)this.points[a].__update()},moveto:function(a){var b=a.sub(this.points[0].pos),c=this.points;for(var d=0;d<c.length;d++)c[d].pos=c[d].pos.add(b)},rotate:function(a,b,c){if(a===undefined)throw new Error("curve.rotate() requires an angle");if(b===undefined)throw new Error("curve.rotate() requires an axis to rotate about");c===undefined&&(c=this.points[0].pos);var d=b.norm(),e=vec(0,1,0),f=d.cross(e).norm();f.dot(f)<1e-10&&(f=d.cross(vec(1,0,0)),f.dot(f)<1e-10&&(f=cross(d,vec(0,1,0))),e=f.cross(d));var g=this.points;for(var h=0;h<g.length;h++)g[h].pos=c.add(g[h].pos.sub(c).rotate(a,b))},push:function(a){var b=[],c;if(a.length!==undefined)b=a;else for(var d=0;d<arguments.length;d++)b.push(arguments[d]);for(var d=0;d<b.length;d++){c=point(b[d]),c.__curve=this,c.__id=nextVisibleId++,c.__falsecolor=id_to_falsecolor(c.__id);if(this.points.length){var e=this.points[this.points.length-1],f=c.__prevsegment=e.__nextsegment=new Float32Array(16);f[11]=f[15]=1,this.__model.id_object[c.__id]=c,e.__change()}this.points.push(c),c.__change()}this.__change()},pop:function(){var a=this.points.pop();return a.visible=!1,this.__change(),{pos:a.pos,color:a.color,radius:a.radius,visible:a.visible}},clear:function(){this.splice(0,this.points.length),this.__change()},shift:function(){var a=this.points.shift();return a.visible=!1,this.__change(),{pos:a.pos,color:a.color,radius:a.radius,visible:a.visible}},unshift:function(a){var b=[];if(a.length!==undefined)b=a;else for(var c=0;c<arguments.length;c++)b.push(arguments[c]);this.splice(0,0,b),this.__change()},splice:function(a){var b=arguments[0],c=arguments[1],d=[];for(var e=2;e<arguments.length;e++)d.push(arguments[e]);d.length==1&&d[0].length!==undefined&&(d=d[0]);var f=this.points.slice(b+c),g=[];for(var e=0;e<f.length;e++)g.push({pos:f[e].pos,color:f[e].color,radius:f[e].radius,visible:f[e].visible});for(var e=b;e<this.points.length;e++)this.points[e].visible=!1;this.points.splice(b),this.push(d),this.push(g),this.__change()},modify:function(a,b){b instanceof vec&&(b={pos:b});for(var c in b)c=="x"&&(this.points[a].pos.x=b[c]),c=="y"&&(this.points[a].pos.y=b[c]),c=="z"?this.points[a].pos.z=b[c]:this.points[a][c]=b[c];this.points[a].__change(),this.__change()},slice:function(a,b){var c=this.points.slice(a,b),d=[];for(var e=0;e<c.length;e++)d.push({pos:c[e].pos,color:c[e].color,radius:c[e].radius,visible:c[e].visible});return d}}),property.declare(point.prototype,{__curve:null,pos:new attributeVector(null,0,0,0),color:null,radius:null,visible:!0,pickable:!0,__change:function(){this.__id&&(this.__curve.canvas.__changed[this.__id]=this,this.__curve.canvas.__changed[this.__curve.__id]=this.__curve)},__update:function(){var a=this.__pos,b=this.radius||this.__curve.__radius,c=this.color||this.__curve.__color,d=this.__prevsegment;d&&(d[4]=a.x,d[5]=a.y,d[6]=a.z,d[7]=b,d[12]=c.x,d[13]=c.y,d[14]=c.z),d=this.__nextsegment,d&&(d[0]=a.x,d[1]=a.y,d[2]=a.z,d[3]=b,d[8]=c.x,d[9]=c.y,d[10]=c.z)}}),subclass(helix,Primitive),property.declare(helix.prototype,{__initialize:!0,thickness:{value:0,onchanged:function(){this.__change()}},coils:{value:5,onchanged:function(){this.__initialize=!0,this.__change()}},__update:function(){var a=20;this.__initialize&&(this.__helix!==undefined?this.__helix.clear():(this.__helix=curve(),this.__helix.__id=nextVisibleId++));var b=this.__helix;b.color=this.__color,b.radius=this.__thickness?this.__thickness/2:this.__size.y/40;var c=this.__axis.norm(),d,e;e=c.cross(this.__up),Math.abs(e.dot(e))<1e-10&&(e=c.cross(vec(1,0,0)),Math.abs(e.dot(e))<1e-10&&(e=c.cross(vec(0,1,0)))),e=e.norm(),d=e.cross(c);var f=this.__size.y/2,g=this.__coils*a,h=this.__axis.norm().multiply(this.__size.x/g),i=Math.sin(2*Math.PI/a),j=Math.cos(2*Math.PI/a),k=f*i,l=-f*(1-j),m,n=[];for(var o=0;o<a;o++)n.push(h.add(d.multiply(k)).add(e.multiply(l))),m=l*j-k*i,k=k*j+l*i,l=m;var p=this.__pos.add(e.multiply(f));for(var o=0;o<=g;o++)this.__initialize?b.push(p):b.modify(o,{pos:p}),p=p.add(n[o%a]);b.__update(),this.__initialize=!1}}),subclass(ring,Primitive),property.declare(ring.prototype,{__initialize:!0,__hasPosAtCenter:!0,__size:new attributeVector(null,.1,1,1),__update:function(){if(this.__initialize)if(this.__ring!==undefined){for(var a=0;a<this.__ring.points.length;a++)this.__ring.points[a].pos=this.__pos;this.__ring.__update(),this.__ring.points=[]}else this.__ring=curve(),this.__ring.__id=nextVisibleId++;var b=this.__ring;b.color=this.__color,b.radius=this.__size.x/2;var c=this.__axis.norm(),d,e;e=c.cross(this.__up),Math.abs(e.dot(e))<1e-10&&(e=c.cross(vec(1,0,0)),Math.abs(e.dot(e))<1e-10&&(e=c.cross(vec(0,1,0)))),e=e.norm(),d=e.cross(c);var f=100,g=(this.__size.y-this.__size.x)/2,h=g,i=0,j,k=Math.sin(2*Math.PI/f),l=Math.cos(2*Math.PI/f),m=this.__pos;for(var a=0;a<=f;a++){var n=m.add(d.multiply(i)).add(e.multiply(h));this.__initialize?b.push(point(n)):b.points[a].pos=n,j=i*l+h*k,h=h*l-i*k,i=j}b.__update(),this.__initialize=!1}}),property.declare(distant_light.prototype,{direction:new attributeVector(null,0,0,1),color:new attributeVector(null,1,1,1),__change:function(){}}),property.declare(local_light.prototype,{pos:new attributeVector(null,0,0,0),color:new attributeVector(null,1,1,1),__change:function(){}}),property.declare(draw.prototype,{color:{value:null,type:property.nullable_attributeVector},fillcolor:{value:null,type:property.nullable_attributeVector},linewidth:{value:1,onchanged:function(){this.__change()}},opacity:{value:.66,onchanged:function(){this.__change()}},visible:{value:!1,onchanged:function(){this.__change()}},__update:function(a,b){var c=this.points.length;if(c<2)return;if(this.fillcolor!=null){a.lineWidth=1,a.fillStyle=color.to_html_rgba(this.fillcolor,this.opacity),a.beginPath();for(var d=0;d<c;d++)d==0?a.moveTo(this.points[d].x,this.points[d].y):a.lineTo(this.points[d].x,this.points[d].y);a.fill()}if(this.color!=null){a.lineWidth=this.linewidth,a.strokeStyle=color.to_html_rgba(this.color,this.opacity),a.beginPath();for(var d=0;d<c;d++)d==0?a.moveTo(this.points[d].x,this.points[d].y):d==c-1&&this.points[d].equals(this.points[0])?a.closePath():a.lineTo(this.points[d].x,this.points[d].y);a.stroke()}},__change:function(){this.canvas.__overlay_objects.__changed=!0}}),property.declare(label.prototype,{pos:new attributeVector(null,0,0,0),color:{value:null,type:property.nullable_attributeVector},line:{value:!0,onchanged:function(){this.__change()}},linecolor:{value:null,type:property.nullable_attributeVector},background:{value:null,type:property.nullable_attributeVector},opacity:{value:.66,onchanged:function(){this.__change()}},text:{value:"",onchanged:function(){this.__change()}},font:{value:"Verdana",onchanged:function(){this.__change()}},height:{value:13,onchanged:function(){this.__change()}},visible:{value:!1,onchanged:function(){this.__change()}},align:{value:"center",onchanged:function(){this.__change()}},box:{value:!0,onchanged:function(){this.__change()}},border:{value:5,onchanged:function(){this.__change()}},linewidth:{value:1,onchanged:function(){this.__change()}},xoffset:{value:0,onchanged:function(){this.__change()}},yoffset:{value:0,onchanged:function(){this.__change()}},space:{value:0,onchanged:function(){this.__change()}},pixel_pos:{value:!1,onchanged:function(){this.__change()}},__update:function(a,b){var c=this.__xoffset,d=this.__yoffset,e,f;if(this.__pixel_pos)e=this.__pos.x,f=this.__pos.y,d=-d;else{if(this.canvas.__width>=this.canvas.__height)var g=2*this.canvas.__range/this.canvas.__height;else var g=2*this.canvas.__range/this.canvas.__width;var h=mat4.multiplyVec3(mat4.rotateY(mat4.rotateX(mat4.identity(mat4.create()),b.angleY),b.angleX),vec3.create([this.pos.x-this.canvas.center.x,this.pos.y-this.canvas.center.y,this.pos.z-this.canvas.center.z])),i=b.distance,j=(1+h[2]/(i-h[2]))/g;e=Math.round(j*h[0]+this.canvas.__width/2),f=Math.round(-j*h[1]+this.canvas.__height/2)}a.font=this.__height+"px "+this.__font,a.textAlign="left",a.textBaseline="middle",a.lineWidth=this.__linewidth;var k=vec(1,1,1);this.canvas.__background.equals(vec(1,1,1))&&(k=vec(0,0,0)),a.strokeStyle=color.to_html(this.__linecolor||this.__color||k);var l=e,m=f,n=a.measureText(this.__text).width,o,p,q,r,s,t;o=Math.ceil(n),p=Math.ceil(this.__height+2*this.__border),q=Math.floor(l-this.__border)+.5,r=Math.ceil(m-.4*p)-.5;if(c||d){Math.abs(d)>Math.abs(c)?(d>0?(r-=d+p/2,m-=d+p/2,t=r+p):(r-=d-p/2,m-=d-p/2,t=r),l+=c-o/2,q=l-this.border,s=l+o/2):(c>0?(q+=c,l+=c,s=q):(l+=c-o,q=l-this.border,s=l+o+this.border),m-=d,r-=d,t=r+p/2);if(this.__line){a.beginPath();if(this.space>0){var u=vec(s-e,t-f,0).norm().multiply(j*this.space);u=u.add(vec(e,f,0)),a.moveTo(u.x,u.y)}else a.moveTo(e,f);a.lineTo(s,t),a.stroke()}}else switch(this.__align){case"center":l-=n/2,q-=n/2;break;case"right":l-=n,q-=n}o+=2*this.__border;var v;this.__background==null?v=this.canvas.__background:v=this.__background,a.fillStyle=color.to_html_rgba(v,this.__opacity),a.fillRect(q,r,o,p),this.__box&&(a.beginPath(),a.moveTo(q,r),a.lineTo(q+o,r),a.lineTo(q+o,r+p),a.lineTo(q,r+p),a.closePath(),a.stroke()),a.fillStyle=color.to_html(this.__color||k),a.fillText(this.__text,l,m)},__change:function(){this.canvas!==undefined&&(this.canvas.__overlay_objects.__changed=!0)}}),subclass(compound,box),eval("0");var exports={box:box,cylinder:cylinder,cone:cone,pyramid:pyramid,sphere:sphere,arrow:arrow,curve:curve,helix:helix,ring:ring,draw:draw,label:label,distant_light:distant_light,local_light:local_light,compound:compound,attach_trail:attach_trail,attach_arrow:attach_arrow,textures:textures,bumpmaps:bumpmaps};Export(exports)}(),function(){function a(a,b){function c(){b()}setTimeout(c,1e3*a)}function b(b){a(0,b)}function d(b,d){if(d===undefined)throw new Error("rate(iterations_per_second, wait) called without wait");var e=1/b;c+=e;var f=(new Date).getTime()*.001;c>f?a(c-f,d):(c<f-.1&&(c=f),a(0,d))}"use strict",$.fn.waitfor=function(a,b){function d(e){c.unbind(a,d),b(null,e)}var c=this;this.bind(a,d)},$.fn.pause=function(a,b){function d(e){a.visible=!1,c.unbind("click",d),b(null,e)}var c=this;this.bind("click",d)};var c=0,e={sqrt:Math.sqrt,pi:Math.PI,abs:Math.abs,sin:Math.sin,cos:Math.cos,tan:Math.tan,asin:Math.asin,acos:Math.acos,atan:Math.atan,atan2:Math.atan2,exp:Math.exp,log:Math.log,pow:Math.pow,radians:function(a){return a*Math.PI/180},degrees:function(a){return a*180/Math.PI},sleep:a,update:b,rate:d};Export(e)}(),Export({shaders:{curve_render_vertex:'// Vertex shader for rendering curve segments, parameterized by\n// pos1, pos2, radius, color\n\n#ifdef GL_ES\nprecision highp float;\n#endif\n\nattribute vec4 position; // position.w is 0 at the beginning of the segment and 1 at the end; \n // position.xyz are relative to that end in an normal basis with x pointing along the segment and scaled by radius\nattribute vec3 normal;\nattribute vec2 texcoord;\nattribute vec3 bumpaxis;\n\nuniform vec4 segmentData[4];\n#define segmentPosR(i) segmentData[i].xyzw\n#define segmentColor(i) segmentData[2+i].rgba\n\nuniform mat4 viewMatrix;\nuniform mat4 projMatrix;\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump, flipx, flipy, turn\n\nmat3 getSegmentRotation() {\n // Construct the object rotation matrix. A waste to do this per vertex, but GPU >> CPU, especially javascript...\n vec3 X = normalize( segmentData[1].xyz - segmentData[0].xyz );\n float hemi = dot(X,vec3(1,0,0)); // need to prevent flip of texture seam in > pi/2 rotation\n if (hemi > 0.0) {\n hemi = 1.0; // object axis and <1,0,0> in same hemisphere\n } else {\n hemi = -1.0;\n } \n vec3 Z = cross(X,normalize(vec3(0,1,0)));\n if ( dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(1,0,0));\n if (dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(0,1,0));\n }\n }\n Z = normalize(Z);\n return mat3( X, hemi*normalize(cross(Z,X)), hemi*Z );\n}\n\nvoid main(void) { \n // A rotation matrix with x pointed along the segment\n mat3 rot = getSegmentRotation();\n\n // The position and radius of "this" end of the segment in world space\n vec4 ws_segmentEnd = segmentPosR(0) * (1.-position.w) + segmentPosR(1) * position.w;\n\n // The position of this vertex in world space\n vec3 ws_pos = ws_segmentEnd.xyz + rot * (ws_segmentEnd.w*position.xyz);\n\n vec4 pos4 = viewMatrix * vec4( ws_pos, 1.0);\n es_position = pos4.xyz;\n es_normal = (viewMatrix * vec4(rot * normal, 0.0)).xyz;\n // no texture or bump map yet for curve object:\n parameters = vec4(0.0, 0.0, 0.0, 0.0);\n bumpX = bumpaxis;\n mat_pos = texcoord;\n mat_color = segmentColor(0) * (1.-position.w) + segmentColor(1) * position.w;\n gl_Position = projMatrix * pos4;\n}\n',extent_vertex:"// Vertex shader for rendering standard 'objects' parameterized by\n// pos, axis, up, scale, color\n\n#ifdef GL_ES\nprecision highp float;\n#endif\nattribute vec3 position;\nattribute vec3 normal;\nattribute vec2 texcoord;\nattribute vec3 bumpaxis;\n\nuniform vec4 objectData[5];\n#define objectPos objectData[0].xyz\n#define objectShininess objectData[0].w\n#define objectAxis objectData[1].xyz\n#define objectEmissive objectData[1].w\n#define objectUp objectData[2].xyz\n#define flags objectData[2].w\n#define objectScale objectData[3].xyz\n#define objectColor objectData[4].rgba\n\nuniform mat4 viewMatrix;\nuniform mat4 projMatrix;\nuniform vec3 center;\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump, flipx, flipy, turn\n\nvec3 encode_float(float k) { // assumes k is >= 0\n if (k <= 0.0) return vec3(0.0, 0.0, 0.0);\n float logk = log(k);\n if (logk < 0.0) {\n logk = -logk + 128.0;\n }\n return vec3(\n floor(logk)/255.0,\n floor(256.0*fract(logk))/255.0,\n floor(256.0*fract(256.0*logk))/255.0);\n}\n\nmat3 getObjectRotation() {\n // Construct the object rotation matrix. A waste to do this per vertex, but GPU >> CPU\n vec3 X = normalize(objectAxis);\n float hemi = dot(X,vec3(1,0,0)); // need to prevent flip of texture seam in > pi/2 rotation\n if (hemi > 0.0) {\n hemi = 1.0; // object axis and <1,0,0> in same hemisphere\n } else {\n hemi = -1.0;\n } \n vec3 Z = cross(X,normalize(objectUp));\n if ( dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(1,0,0));\n if (dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(0,1,0));\n }\n }\n Z = normalize(Z);\n return mat3( X, hemi*normalize(cross(Z,X)), hemi*Z );\n}\n\nvoid main(void) {\n mat3 rot = getObjectRotation();\n // The position of this vertex in world space\n vec3 ws_pos = rot*(objectScale*position) + objectPos;\n vec4 pos4 = viewMatrix * vec4( ws_pos, 1.0);\n es_position = pos4.xyz;\n es_normal = (viewMatrix * vec4(rot*normal, 0.0)).xyz;\n vec4 pos = projMatrix * pos4;\n bumpX = (viewMatrix * vec4(rot*bumpaxis, 0.0)).xyz;\n mat_pos = texcoord;\n float extent = abs(ws_pos.x-center.x);\n extent = max(abs(ws_pos.y-center.y), extent);\n extent = max(abs(ws_pos.z-center.z), extent);\n mat_color = vec4(encode_float(extent), 1.0);\n // Setting gl_Position.xy to (-1.0, -1.0) should store into pixel (0, 0), but doesn't work:\n gl_Position = vec4(-1.0, -1.0, 1e-20*extent, 1.0);\n //gl_Position = pos;\n parameters = vec4(objectShininess, objectEmissive, 0.0, 0.0);\n}\n",final_fragment:"#ifdef GL_ES\nprecision highp float;\n#endif\n\nuniform sampler2D FINAL;\nvarying vec2 mat_pos;\n\nvoid main(void) {\n gl_FragColor = vec4( texture2D(FINAL, mat_pos).xyz, 1.0);\n}\n",merge_fragment:"#ifdef GL_ES\nprecision highp float;\n#endif\n\nuniform int light_count;\nuniform vec4 light_pos[8];\nuniform vec3 light_color[8];\nuniform vec3 light_ambient;\n\nuniform sampler2D texmap; // TEXTURE0 - user texture\nuniform sampler2D bumpmap; // TEXTURE1 - user bumpmap\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\n\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump\n#define shininess parameters[0]\n#define emissive parameters[1]\n#define hasTexture parameters[2]\n#define hasBump parameters[3]\n\nuniform sampler2D C0; // TEXTURE2 - opaque color map (minormode 4)\nuniform sampler2D D2; // TEXTURE5 - 2nd of two ping-pong depth maps (minormode 7); also used for C4\nuniform sampler2D C1; // TEXTURE6 - color map for transparency render 1 (minormode 8)\nuniform sampler2D C2; // TEXTURE7 - color map for transparency render 2 (minormode 9)\nuniform sampler2D C3; // TEXTURE8 - color map for transparency render 3 (minormode 10)\nuniform vec2 canvas_size;\n\n// This code is a horrible kludge to work on Mac Snow Leopard and Linux.\n// Change almost anything, and it fails. Presumably there's something wrong\n// elsewhere in the GlowScript code, but where is unknown.\n// Obviously this (reduced) lightAt routine should be unnecessary.\n\nvec3 lightAt( vec3 normal, vec3 pos, vec3 diffuse_color, vec3 specular_color )\n{\n vec3 color;\n if (hasBump < 0.0) { // hasBump is never negative; block this code\n vec3 Y = cross(normal, bumpX);\n vec3 Nb = texture2D(bumpmap, mat_pos).xyz;\n Nb = 2.0*Nb - 1.0;\n normal = normalize(Nb.x*bumpX + Nb.y*Y + Nb.z*normal);\n }\n if (emissive < 0.0) { // emissive is never negative; block this code\n // From VPython materials.emissive:\n float d = dot(normalize(-pos), normal);\n d = pow(d * 1.5, 0.4) * 1.1;\n if (d > 1.0) d = 1.0;\n color = diffuse_color * d;\n return color;\n }\n color = light_ambient * diffuse_color;\n return diffuse_color;\n}\n\nvoid main(void) {\n // need to combine colors from C0, C1, C2, C3, C4\n vec2 loc = vec2( gl_FragCoord.x/canvas_size.x, gl_FragCoord.y/canvas_size.y);\n vec4 c0 = texture2D(C0, loc);\n vec4 c1 = texture2D(C1, loc);\n vec4 c2 = texture2D(C2, loc);\n vec4 c3 = texture2D(C3, loc);\n vec4 c4 = texture2D(D2, loc);\n vec3 mcolor = c1.rgb*c1.a + \n (1.0-c1.a)*(c2.rgb*c2.a +\n (1.0-c2.a)*(c3.rgb*c3.a +\n (1.0-c3.a)*(c4.rgb*c4.a + \n (1.0-c4.a)*c0.rgb)));\n \n // Kludge code to make things work on Snow Leopard and Linux\n vec3 color = lightAt(normalize(es_normal), es_position, mcolor, vec3(.8,.8,.8));\n gl_FragColor = vec4 (color, 1.0);\n}\n",merge_vertex:"// Vertex shader for rendering standard 'objects' parameterized by\n// pos, axis, up, scale, color\n\n#ifdef GL_ES\nprecision highp float;\n#endif\n\nattribute vec3 position;\nattribute vec3 normal;\nattribute vec2 texcoord;\nattribute vec3 bumpaxis;\n\nuniform vec4 objectData[5];\n#define objectPos objectData[0].xyz\n#define objectShininess objectData[0].w\n#define objectAxis objectData[1].xyz\n#define objectEmissive objectData[1].w\n#define objectUp objectData[2].xyz\n#define flags objectData[2].w\n#define objectScale objectData[3].xyz\n#define objectColor objectData[4].rgba\n\nuniform mat4 viewMatrix;\nuniform mat4 projMatrix;\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump, flipx, flipy, turn\n\nmat3 getObjectRotation() {\n // Construct the object rotation matrix. A waste to do this per vertex, but GPU >> CPU\n vec3 X = normalize(objectAxis);\n float hemi = dot(X,vec3(1,0,0)); // need to prevent flip of texture seam in > pi/2 rotation\n if (hemi > 0.0) {\n hemi = 1.0; // object axis and <1,0,0> in same hemisphere\n } else {\n hemi = -1.0;\n } \n vec3 Z = cross(X,normalize(objectUp));\n if ( dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(1,0,0));\n if (dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(0,1,0));\n }\n }\n Z = normalize(Z);\n return mat3( X, hemi*normalize(cross(Z,X)), hemi*Z );\n}\n\nvoid main(void) {\n mat3 rot = getObjectRotation();\n // The position of this vertex in world space\n vec3 ws_pos = rot*(objectScale*position) + objectPos;\n vec4 pos4 = viewMatrix * vec4( ws_pos, 1.0);\n es_position = pos4.xyz;\n //es_normal = (viewMatrix * vec4(rot*normal, 0.0)).xyz;\n vec4 pos = projMatrix * pos4;\n bumpX = (viewMatrix * vec4(rot*bumpaxis, 0.0)).xyz;\n mat_pos = texcoord;\n mat_color = objectColor;\n //gl_Position = pos;\n parameters = vec4(objectShininess, objectEmissive, 0.0, 0.0);\n \n es_normal = normal;\n gl_Position = vec4(position, 1.0);\n}\n"

,opaque_render_fragment:"#ifdef GL_ES\nprecision highp float;\n#endif\n\nuniform int light_count;\nuniform vec4 light_pos[8];\nuniform vec3 light_color[8];\nuniform vec3 light_ambient;\n\nuniform sampler2D texmap; // TEXTURE0 - user texture\nuniform sampler2D bumpmap; // TEXTURE1 - user bumpmap\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump\n#define shininess parameters[0]\n#define emissive parameters[1]\n#define hasTexture parameters[2]\n#define hasBump parameters[3]\n\n// Return lit surface color based on the given surface properties and the lights\n// specified by the light_* uniforms.\nvec3 lightAt( vec3 normal, vec3 pos, vec3 diffuse_color, vec3 specular_color )\n{\n vec3 color;\n if (hasTexture != 0.0) {\n diffuse_color = diffuse_color * texture2D(texmap, mat_pos).xyz;\n }\n if (hasBump != 0.0) {\n vec3 Y = cross(normal, bumpX);\n vec3 Nb = texture2D(bumpmap, mat_pos).xyz;\n Nb = 2.0*Nb - 1.0;\n normal = normalize(Nb.x*bumpX + Nb.y*Y + Nb.z*normal);\n }\n if (emissive != 0.0) {\n // From VPython materials.emissive:\n float d = dot(normalize(-pos), normal);\n d = pow(d * 1.5, 0.4) * 1.1;\n if (d > 1.0) d = 1.0;\n color = diffuse_color * d;\n return color;\n }\n color = light_ambient * diffuse_color;\n\n for(int i=0; i<8; i++) {\n if (i >= light_count) break;\n vec3 L = light_pos[i].xyz - pos*light_pos[i].w; // w == 0 for distant_light\n L = normalize(L);\n color += (light_color[i].rgb * max(dot(normal,L), 0.0))*diffuse_color;\n if (shininess > 0.0) {\n vec3 R = reflect(L,normal);\n color += specular_color * light_color[i].rgb * pow(max(dot(R,normalize(pos)),0.0),100.0*shininess);\n }\n }\n return color;\n}\n\nvoid main(void) {\n vec3 color = lightAt(normalize(es_normal), es_position, mat_color.rgb, vec3(.8,.8,.8));\n gl_FragColor = vec4( color, 1.0 );\n}\n",peel_color_fragment:"#ifdef GL_ES\nprecision highp float;\n#endif\n\nuniform int light_count;\nuniform vec4 light_pos[8];\nuniform vec3 light_color[8];\nuniform vec3 light_ambient;\nuniform vec2 canvas_size;\n// minormode = 0 render, 1 pick, 2 autoscale, 4 C0, 5 D0, 6 D1, 7 D2, 8 C1, 9 C2, 10 C3, 11 C4\nuniform int minormode;\n\nuniform sampler2D texmap; // TEXTURE0 - user texture\nuniform sampler2D bumpmap; // TEXTURE1 - user bumpmap\nuniform sampler2D D0; // TEXTURE3 - opaque depth map (minormode 5)\nuniform sampler2D D1; // TEXTURE4 - 1st of two ping-pong depth maps (minormode 6)\nuniform sampler2D D2; // TEXTURE5 - 2nd of two ping-pong depth maps (minormode 7); also used for C4\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump\n#define shininess parameters[0]\n#define emissive parameters[1]\n#define hasTexture parameters[2]\n#define hasBump parameters[3]\n\n// Return lit surface color based on the given surface properties and the lights\n// specified by the light_* uniforms.\nvec3 lightAt( vec3 normal, vec3 pos, vec3 diffuse_color, vec3 specular_color )\n{\n vec3 color;\n if (hasTexture != 0.0) {\n diffuse_color = diffuse_color * texture2D(texmap, mat_pos).xyz;\n }\n if (hasBump != 0.0) {\n vec3 Y = cross(normal, bumpX);\n vec3 Nb = texture2D(bumpmap, mat_pos).xyz;\n Nb = 2.0*Nb - 1.0;\n normal = normalize(Nb.x*bumpX + Nb.y*Y + Nb.z*normal);\n }\n if (emissive != 0.0) {\n // From VPython materials.emissive:\n float d = dot(normalize(-pos), normal);\n d = pow(d * 1.5, 0.4) * 1.1;\n if (d > 1.0) d = 1.0;\n color = diffuse_color * d;\n return color;\n }\n color = light_ambient * diffuse_color;\n\n for(int i=0; i<8; i++) {\n if (i >= light_count) break;\n vec3 L = light_pos[i].xyz - pos*light_pos[i].w; // w == 0 for distant_light\n L = normalize(L);\n color += (light_color[i].rgb * max(dot(normal,L), 0.0))*diffuse_color;\n if (shininess > 0.0) {\n vec3 R = reflect(L,normal);\n color += specular_color * light_color[i].rgb * pow(max(dot(R,normalize(pos)),0.0),100.0*shininess);\n }\n }\n return color;\n}\n\nvec4 encode(float k) { // assumes k is >= 0\n if (k <= 0.0) return vec4(0.0, 0.0, 0.0, 0.0);\n return vec4(\n floor(256.0*k)/255.0,\n floor(256.0*fract(256.0*k))/255.0,\n floor(256.0*fract(65536.0*k))/255.0,\n 0.0);\n}\n\nfloat decode(vec4 d) {\n if (length(d) == 0.0) return 0.0;\n return (65536.0*d[0] + 256.0*d[1] + d[2])/16777216.0;\n}\n\nvoid main(void) {\n // create transparency color map - C1 (8), C2 (9), C3 (10), C4 (11)\n vec3 color = lightAt(normalize(es_normal), es_position, mat_color.rgb, vec3(.8,.8,.8));\n vec2 loc = vec2(gl_FragCoord.x/canvas_size.x, gl_FragCoord.y/canvas_size.y);\n float z = decode(encode(1.0-gl_FragCoord.z)); // bigger number => closer to camera; distance out of screen\n float zmin = decode(texture2D(D0, loc));\n float zmax;\n if (minormode == 8) { // C1\n if (z > zmin) {\n gl_FragColor = vec4( color, mat_color.a );\n } else {\n discard;\n }\n } else {\n if (minormode == 10) { // C3\n zmax = decode(texture2D(D2, loc));\n } else { // C2 or C4\n zmax = decode(texture2D(D1, loc));\n }\n if (zmin < z && z < zmax) {\n gl_FragColor = vec4( color, mat_color.a );\n } else {\n discard;\n }\n }\n}\n",peel_depth_fragment:"#ifdef GL_ES\nprecision highp float;\n#endif\n\nuniform int light_count;\nuniform vec4 light_pos[8];\nuniform vec3 light_color[8];\nuniform vec3 light_ambient;\n\nuniform sampler2D texmap; // TEXTURE0 - user texture\nuniform sampler2D bumpmap; // TEXTURE1 - user bumpmap\n\nuniform vec2 canvas_size;\nuniform sampler2D D0; // TEXTURE3 - opaque depth map (minormode 5)\nuniform sampler2D D1; // TEXTURE4 - 1st of two ping-pong depth maps (minormode 6)\nuniform sampler2D D2; // TEXTURE5 - 2nd of two ping-pong depth maps (minormode 7); also used for C4\n// minormode = 0 render, 1 pick, 2 autoscale, 4 C0, 5 D0, 6 D1, 7 D2, 8 C1, 9 C2, 10 C3, 11 C4\nuniform int minormode;\n// depthreference = 0 if no reference to max depth map, 1 if refers to D1, 2 if refers to D2\nuniform int depthreference;\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\n\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump\n#define shininess parameters[0]\n#define emissive parameters[1]\n#define hasTexture parameters[2]\n#define hasBump parameters[3]\n\nvec4 encode(float k) { // assumes k is >= 0\n if (k <= 0.0) return vec4(0.0, 0.0, 0.0, 0.0);\n return vec4(\n floor(256.0*k)/255.0,\n floor(256.0*fract(256.0*k))/255.0,\n floor(256.0*fract(65536.0*k))/255.0,\n 0.0);\n}\n\nfloat decode(vec4 d) {\n if (length(d) == 0.0) return 0.0;\n return (65536.0*d[0] + 256.0*d[1] + d[2])/16777216.0;\n}\n\n// This code is a horrible kludge to work on Mac Snow Leopard and Linux.\n// Change almost anything, and it fails. Presumably there's something wrong\n// elsewhere in the GlowScript code, but where is unknown.\n// Obviously this (reduced) lightAt routine should be unnecessary.\n\nvec3 lightAt( vec3 normal, vec3 pos, vec3 diffuse_color, vec3 specular_color )\n{\n vec3 color;\n if (hasBump < 0.0) { // hasBump is never negative; block this code\n vec3 Y = cross(normal, bumpX);\n vec3 Nb = texture2D(bumpmap, mat_pos).xyz;\n Nb = 2.0*Nb - 1.0;\n normal = normalize(Nb.x*bumpX + Nb.y*Y + Nb.z*normal);\n }\n if (emissive < 0.0) { // emissive is never negative; block this code\n // From VPython materials.emissive:\n float d = dot(normalize(-pos), normal);\n d = pow(d * 1.5, 0.4) * 1.1;\n if (d > 1.0) d = 1.0;\n color = diffuse_color * d;\n return color;\n }\n color = light_ambient * diffuse_color;\n return mat_color.rgb;\n}\n\nvoid main(void) {\n // Kludge code to make things work on Snow Leopard and Linux\n vec3 color = lightAt(normalize(es_normal), es_position, mat_color.rgb, vec3(.8,.8,.8));\n gl_FragColor = vec4(color, mat_color.a);\n \n // create depth map, D0 (5); ping-pong D1 (6) and D2 (7)\n vec4 c = encode(1.0-gl_FragCoord.z);\n float z = decode(c);\n if (minormode == 5) { // D0\n gl_FragColor = c;\n } else {\n vec2 loc = vec2(gl_FragCoord.x/canvas_size.x, gl_FragCoord.y/canvas_size.y);\n float zmin = decode(texture2D(D0, loc));\n float zmax;\n if (depthreference == 0) { // first creation of D1\n if (z > zmin) {\n gl_FragColor = c;\n } else {\n discard;\n }\n } else {\n if (depthreference == 1) {\n zmax = decode(texture2D(D1, loc));\n } else {\n zmax = decode(texture2D(D2, loc));\n }\n if (zmin < z && z < zmax) {\n gl_FragColor = c;\n } else {\n discard;\n }\n }\n }\n}\n",pick_fragment:"#ifdef GL_ES\nprecision highp float;\n#endif\n\nuniform int light_count;\nuniform vec4 light_pos[8];\nuniform vec3 light_color[8];\nuniform vec3 light_ambient;\n\nuniform sampler2D texmap; // TEXTURE0 - user texture\nuniform sampler2D bumpmap; // TEXTURE1 - user bumpmap\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\n\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump\n#define shininess parameters[0]\n#define emissive parameters[1]\n#define hasTexture parameters[2]\n#define hasBump parameters[3]\n\n// This code is a horrible kludge to work on Mac Snow Leopard and Linux.\n// Change almost anything, and it fails. Presumably there's something wrong\n// elsewhere in the GlowScript code, but where is unknown.\n// Obviously this (reduced) lightAt routine should be unnecessary.\n\nvec3 lightAt( vec3 normal, vec3 pos, vec3 diffuse_color, vec3 specular_color )\n{\n vec3 color;\n if (hasBump < 0.0) { // hasBump is never negative; block this code\n vec3 Y = cross(normal, bumpX);\n vec3 Nb = texture2D(bumpmap, mat_pos).xyz;\n Nb = 2.0*Nb - 1.0;\n normal = normalize(Nb.x*bumpX + Nb.y*Y + Nb.z*normal);\n }\n if (emissive < 0.0) { // emissive is never negative; block this code\n // From VPython materials.emissive:\n float d = dot(normalize(-pos), normal);\n d = pow(d * 1.5, 0.4) * 1.1;\n if (d > 1.0) d = 1.0;\n color = diffuse_color * d;\n return color;\n }\n color = light_ambient * diffuse_color;\n return mat_color.rgb;\n}\n\nvoid main(void) {\n // Kludge code to make things work on Snow Leopard and Linux\n vec3 color = lightAt(normalize(es_normal), es_position, mat_color.rgb, vec3(.8,.8,.8));\n gl_FragColor = vec4(color, mat_color.a);\n}\n",pick_vertex:"// Vertex shader for rendering standard 'objects' parameterized by\n// pos, axis, up, scale, color\n\n#ifdef GL_ES\nprecision highp float;\n#endif\n\nattribute vec3 position;\nattribute vec3 normal;\nattribute vec2 texcoord;\nattribute vec3 bumpaxis;\n\nuniform vec4 objectData[5];\n#define objectPos objectData[0].xyz\n#define objectShininess objectData[0].w\n#define objectAxis objectData[1].xyz\n#define objectEmissive objectData[1].w\n#define objectUp objectData[2].xyz\n#define flags objectData[2].w\n#define objectScale objectData[3].xyz\n#define objectColor objectData[4].rgba\n\nuniform mat4 viewMatrix;\nuniform mat4 projMatrix;\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump, flipx, flipy, turn\n\nmat3 getObjectRotation() {\n // Construct the object rotation matrix. A waste to do this per vertex, but GPU >> CPU\n vec3 X = normalize(objectAxis);\n float hemi = dot(X,vec3(1,0,0)); // need to prevent flip of texture seam in > pi/2 rotation\n if (hemi > 0.0) {\n hemi = 1.0; // object axis and <1,0,0> in same hemisphere\n } else {\n hemi = -1.0;\n } \n vec3 Z = cross(X,normalize(objectUp));\n if ( dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(1,0,0));\n if (dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(0,1,0));\n }\n }\n Z = normalize(Z);\n return mat3( X, hemi*normalize(cross(Z,X)), hemi*Z );\n}\n\nvoid main(void) {\n mat3 rot = getObjectRotation();\n // The position of this vertex in world space\n vec3 ws_pos = rot*(objectScale*position) + objectPos;\n vec4 pos4 = viewMatrix * vec4( ws_pos, 1.0);\n es_position = pos4.xyz;\n es_normal = (viewMatrix * vec4(rot*normal, 0.0)).xyz;\n vec4 pos = projMatrix * pos4;\n bumpX = (viewMatrix * vec4(rot*bumpaxis, 0.0)).xyz;\n mat_pos = texcoord;\n mat_color = objectColor;\n gl_Position = pos;\n parameters = vec4(objectShininess, objectEmissive, 0.0, 0.0);\n}\n",render_vertex:"// Vertex shader for rendering standard 'objects' parameterized by\n// pos, axis, up, scale, color\n\n#ifdef GL_ES\nprecision highp float;\n#endif\n\nattribute vec3 position;\nattribute vec3 normal;\nattribute vec2 texcoord;\nattribute vec3 bumpaxis;\n\nuniform vec4 objectData[5];\n#define objectPos objectData[0].xyz\n#define objectShininess objectData[0].w\n#define objectAxis objectData[1].xyz\n#define objectEmissive objectData[1].w\n#define objectUp objectData[2].xyz\n#define flags objectData[2].w\n#define objectScale objectData[3].xyz\n#define objectColor objectData[4].rgba\n\nuniform mat4 viewMatrix;\nuniform mat4 projMatrix;\n\nvarying vec3 es_position; // eye space surface position\nvarying vec3 es_normal; // eye space surface normal\nvarying vec2 mat_pos; // surface material position in [0,1]^2\nvarying vec4 mat_color;\nvarying vec3 bumpX;\nvarying vec4 parameters; // shininess, emissive, hasTexture, hasBump, flipx, flipy, turn\n\nmat3 getObjectRotation() {\n // Construct the object rotation matrix. A waste to do this per vertex, but GPU >> CPU\n vec3 X = normalize(objectAxis);\n float hemi = dot(X,vec3(1,0,0)); // need to prevent flip of texture seam in > pi/2 rotation\n if (hemi > 0.0) {\n hemi = 1.0; // object axis and <1,0,0> in same hemisphere\n } else {\n hemi = -1.0;\n } \n vec3 Z = cross(X,normalize(objectUp));\n if ( dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(1,0,0));\n if (dot(Z,Z) < 1e-10 ) {\n Z = cross(X, vec3(0,1,0));\n }\n }\n Z = normalize(Z);\n return mat3( X, hemi*normalize(cross(Z,X)), hemi*Z );\n}\n\nvoid main(void) {\n mat3 rot = getObjectRotation();\n // The position of this vertex in world space\n vec3 ws_pos = rot*(objectScale*position) + objectPos;\n vec4 pos4 = viewMatrix * vec4( ws_pos, 1.0);\n es_position = pos4.xyz;\n es_normal = (viewMatrix * vec4(rot*normal, 0.0)).xyz;\n vec4 pos = projMatrix * pos4;\n bumpX = (viewMatrix * vec4(rot*bumpaxis, 0.0)).xyz;\n mat_pos = texcoord;\n mat_color = objectColor;\n gl_Position = pos;\n float f = flags; // turn, flipy, flipx, sides, right, left, bumpmap, texture\n float turn = floor(f/128.0);\n f -= 128.0*turn;\n float flipy = floor(f/64.0);\n f -= 64.0*flipy;\n float flipx = floor(f/32.0);\n f -= 32.0*flipx;\n float sides = floor(f/16.0);\n f -= 16.0*sides;\n float right = floor(f/8.0);\n f -= 8.0*right;\n float left = floor(f/4.0);\n f -= 4.0*left;\n float B = floor(f/2.0);\n f -= 2.0*B;\n float T = f;\n if (T != 0.0) {\n if (flipx != 0.0) {\n mat_pos.x = 1.0 - mat_pos.x;\n }\n if (flipy != 0.0) {\n mat_pos.y = 1.0 - mat_pos.y;\n }\n if (turn > 0.0 && turn <= 3.0) {\n if (turn == 1.0) {\n mat_pos = vec2(mat_pos.y,1.0 - mat_pos.x);\n } else if (turn == 2.0) {\n mat_pos = vec2(1.0 - mat_pos.x,1.0 - mat_pos.y);\n } else {\n mat_pos = vec2(1.0 - mat_pos.y,mat_pos.x);\n }\n }\n T = 0.0;\n bool L = (normal.x == -1.0);\n bool R = (normal.x == 1.0);\n bool S = !L && !R;\n if (L && left == 1.0) T = 1.0;\n if (R && right == 1.0) T = 1.0;\n if (S && sides == 1.0) T = 1.0;\n if (T == 0.0) {\n B = 0.0;\n } else if (left == 0.0 || right == 0.0 || sides == 0.0) {\n // don't mix texture and object color if texture doesn't cover entire object\n mat_color = vec4(1.0, 1.0, 1.0, 1.0);\n }\n }\n parameters = vec4(objectShininess, objectEmissive, T, B);\n}\n"}})/*This is a combined, compressed file. Look at https://bitbucket.org/davidscherer/glowscript for source code and copyright information.*/

;(function(){})();