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- var BABYLON,__extends=this&&this.__extends||(function(){var i=function(e,t){return(i=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(e,t){e.__proto__=t}||function(e,t){for(var n in t)t.hasOwnProperty(n)&&(e[n]=t[n])})(e,t)};return function(e,t){function n(){this.constructor=e}i(e,t),e.prototype=null===t?Object.create(t):(n.prototype=t.prototype,new n)}})(),__decorate=this&&this.__decorate||function(e,t,n,i){var o,a=arguments.length,r=a<3?t:null===i?i=Object.getOwnPropertyDescriptor(t,n):i;if("object"==typeof Reflect&&"function"==typeof Reflect.decorate)r=Reflect.decorate(e,t,n,i);else for(var c=e.length-1;0<=c;c--)(o=e[c])&&(r=(a<3?o(r):3<a?o(t,n,r):o(t,n))||r);return 3<a&&r&&Object.defineProperty(t,n,r),r};!(function(l){var s=(function(t){function e(){var e=t.call(this)||this;return e.CLIPPLANE=!1,e.CLIPPLANE2=!1,e.CLIPPLANE3=!1,e.CLIPPLANE4=!1,e.POINTSIZE=!1,e.FOG=!1,e.VERTEXCOLOR=!1,e.VERTEXALPHA=!1,e.rebuild(),e}return __extends(e,t),e})(l.MaterialDefines),e=(function(i){function o(e,t){var n=i.call(this,e,t)||this;return n.luminance=1,n.turbidity=10,n.rayleigh=2,n.mieCoefficient=.005,n.mieDirectionalG=.8,n.distance=500,n.inclination=.49,n.azimuth=.25,n.sunPosition=new l.Vector3(0,100,0),n.useSunPosition=!1,n._cameraPosition=l.Vector3.Zero(),n}return __extends(o,i),o.prototype.needAlphaBlending=function(){return this.alpha<1},o.prototype.needAlphaTesting=function(){return!1},o.prototype.getAlphaTestTexture=function(){return null},o.prototype.isReadyForSubMesh=function(e,t,n){if(this.isFrozen&&this._wasPreviouslyReady&&t.effect)return!0;t._materialDefines||(t._materialDefines=new s);var i=t._materialDefines,o=this.getScene();if(!this.checkReadyOnEveryCall&&t.effect&&this._renderId===o.getRenderId())return!0;if(l.MaterialHelper.PrepareDefinesForMisc(e,o,!1,this.pointsCloud,this.fogEnabled,!1,i),l.MaterialHelper.PrepareDefinesForAttributes(e,i,!0,!1),i.isDirty){i.markAsProcessed(),o.resetCachedMaterial();var a=new l.EffectFallbacks;i.FOG&&a.addFallback(1,"FOG");var r=[l.VertexBuffer.PositionKind];i.VERTEXCOLOR&&r.push(l.VertexBuffer.ColorKind);var c=i.toString();t.setEffect(o.getEngine().createEffect("sky",r,["world","viewProjection","view","vFogInfos","vFogColor","pointSize","vClipPlane","vClipPlane2","vClipPlane3","vClipPlane4","luminance","turbidity","rayleigh","mieCoefficient","mieDirectionalG","sunPosition","cameraPosition"],[],c,a,this.onCompiled,this.onError),i)}return!(!t.effect||!t.effect.isReady())&&(this._renderId=o.getRenderId(),this._wasPreviouslyReady=!0)},o.prototype.bindForSubMesh=function(e,t,n){var i=this.getScene();if(n._materialDefines){var o=n.effect;if(o){this._activeEffect=o,this.bindOnlyWorldMatrix(e),this._activeEffect.setMatrix("viewProjection",i.getTransformMatrix()),this._mustRebind(i,o)&&(l.MaterialHelper.BindClipPlane(this._activeEffect,i),this.pointsCloud&&this._activeEffect.setFloat("pointSize",this.pointSize)),i.fogEnabled&&t.applyFog&&i.fogMode!==l.Scene.FOGMODE_NONE&&this._activeEffect.setMatrix("view",i.getViewMatrix()),l.MaterialHelper.BindFogParameters(i,t,this._activeEffect);var a=i.activeCamera;if(a){var r=a.getWorldMatrix();this._cameraPosition.x=r.m[12],this._cameraPosition.y=r.m[13],this._cameraPosition.z=r.m[14],this._activeEffect.setVector3("cameraPosition",this._cameraPosition)}if(0<this.luminance&&this._activeEffect.setFloat("luminance",this.luminance),this._activeEffect.setFloat("turbidity",this.turbidity),this._activeEffect.setFloat("rayleigh",this.rayleigh),this._activeEffect.setFloat("mieCoefficient",this.mieCoefficient),this._activeEffect.setFloat("mieDirectionalG",this.mieDirectionalG),!this.useSunPosition){var c=Math.PI*(this.inclination-.5),s=2*Math.PI*(this.azimuth-.5);this.sunPosition.x=this.distance*Math.cos(s),this.sunPosition.y=this.distance*Math.sin(s)*Math.sin(c),this.sunPosition.z=this.distance*Math.sin(s)*Math.cos(c)}this._activeEffect.setVector3("sunPosition",this.sunPosition),this._afterBind(t,this._activeEffect)}}},o.prototype.getAnimatables=function(){return[]},o.prototype.dispose=function(e){i.prototype.dispose.call(this,e)},o.prototype.clone=function(e){var t=this;return l.SerializationHelper.Clone((function(){return new o(e,t.getScene())}),this)},o.prototype.serialize=function(){var e=l.SerializationHelper.Serialize(this);return e.customType="BABYLON.SkyMaterial",e},o.prototype.getClassName=function(){return"SkyMaterial"},o.Parse=function(e,t,n){return l.SerializationHelper.Parse((function(){return new o(e.name,t)}),e,t,n)},__decorate([l.serialize()],o.prototype,"luminance",void 0),__decorate([l.serialize()],o.prototype,"turbidity",void 0),__decorate([l.serialize()],o.prototype,"rayleigh",void 0),__decorate([l.serialize()],o.prototype,"mieCoefficient",void 0),__decorate([l.serialize()],o.prototype,"mieDirectionalG",void 0),__decorate([l.serialize()],o.prototype,"distance",void 0),__decorate([l.serialize()],o.prototype,"inclination",void 0),__decorate([l.serialize()],o.prototype,"azimuth",void 0),__decorate([l.serializeAsVector3()],o.prototype,"sunPosition",void 0),__decorate([l.serialize()],o.prototype,"useSunPosition",void 0),o})(l.PushMaterial);l.SkyMaterial=e})(BABYLON||(BABYLON={})),BABYLON.Effect.ShadersStore.skyVertexShader="precision highp float;\n\nattribute vec3 position;\n#ifdef VERTEXCOLOR\nattribute vec4 color;\n#endif\n\nuniform mat4 world;\nuniform mat4 view;\nuniform mat4 viewProjection;\n#ifdef POINTSIZE\nuniform float pointSize;\n#endif\n\nvarying vec3 vPositionW;\n#ifdef VERTEXCOLOR\nvarying vec4 vColor;\n#endif\n#include<clipPlaneVertexDeclaration>\n#include<fogVertexDeclaration>\nvoid main(void) {\ngl_Position=viewProjection*world*vec4(position,1.0);\nvec4 worldPos=world*vec4(position,1.0);\nvPositionW=vec3(worldPos);\n\n#include<clipPlaneVertex>\n\n#include<fogVertex>\n\n#ifdef VERTEXCOLOR\nvColor=color;\n#endif\n\n#ifdef POINTSIZE\ngl_PointSize=pointSize;\n#endif\n}\n",BABYLON.Effect.ShadersStore.skyPixelShader="precision highp float;\n\nvarying vec3 vPositionW;\n#ifdef VERTEXCOLOR\nvarying vec4 vColor;\n#endif\n#include<clipPlaneFragmentDeclaration>\n\nuniform vec3 cameraPosition;\nuniform float luminance;\nuniform float turbidity;\nuniform float rayleigh;\nuniform float mieCoefficient;\nuniform float mieDirectionalG;\nuniform vec3 sunPosition;\n\n#include<fogFragmentDeclaration>\n\nconst float e=2.71828182845904523536028747135266249775724709369995957;\nconst float pi=3.141592653589793238462643383279502884197169;\nconst float n=1.0003;\nconst float N=2.545E25;\nconst float pn=0.035;\nconst vec3 lambda=vec3(680E-9,550E-9,450E-9);\nconst vec3 K=vec3(0.686,0.678,0.666);\nconst float v=4.0;\nconst float rayleighZenithLength=8.4E3;\nconst float mieZenithLength=1.25E3;\nconst vec3 up=vec3(0.0,1.0,0.0);\nconst float EE=1000.0;\nconst float sunAngularDiameterCos=0.999956676946448443553574619906976478926848692873900859324;\nconst float cutoffAngle=pi/1.95;\nconst float steepness=1.5;\nvec3 totalRayleigh(vec3 lambda)\n{\nreturn (8.0*pow(pi,3.0)*pow(pow(n,2.0)-1.0,2.0)*(6.0+3.0*pn))/(3.0*N*pow(lambda,vec3(4.0))*(6.0-7.0*pn));\n}\nvec3 simplifiedRayleigh()\n{\nreturn 0.0005/vec3(94,40,18);\n}\nfloat rayleighPhase(float cosTheta)\n{ \nreturn (3.0/(16.0*pi))*(1.0+pow(cosTheta,2.0));\n}\nvec3 totalMie(vec3 lambda,vec3 K,float T)\n{\nfloat c=(0.2*T )*10E-18;\nreturn 0.434*c*pi*pow((2.0*pi)/lambda,vec3(v-2.0))*K;\n}\nfloat hgPhase(float cosTheta,float g)\n{\nreturn (1.0/(4.0*pi))*((1.0-pow(g,2.0))/pow(1.0-2.0*g*cosTheta+pow(g,2.0),1.5));\n}\nfloat sunIntensity(float zenithAngleCos)\n{\nreturn EE*max(0.0,1.0-exp((-(cutoffAngle-acos(zenithAngleCos))/steepness)));\n}\nfloat A=0.15;\nfloat B=0.50;\nfloat C=0.10;\nfloat D=0.20;\nfloat EEE=0.02;\nfloat F=0.30;\nfloat W=1000.0;\nvec3 Uncharted2Tonemap(vec3 x)\n{\nreturn ((x*(A*x+C*B)+D*EEE)/(x*(A*x+B)+D*F))-EEE/F;\n}\nvoid main(void) {\n\n#include<clipPlaneFragment>\n\nfloat sunfade=1.0-clamp(1.0-exp((sunPosition.y/450000.0)),0.0,1.0);\nfloat rayleighCoefficient=rayleigh-(1.0*(1.0-sunfade));\nvec3 sunDirection=normalize(sunPosition);\nfloat sunE=sunIntensity(dot(sunDirection,up));\nvec3 betaR=simplifiedRayleigh()*rayleighCoefficient;\nvec3 betaM=totalMie(lambda,K,turbidity)*mieCoefficient;\nfloat zenithAngle=acos(max(0.0,dot(up,normalize(vPositionW-cameraPosition))));\nfloat sR=rayleighZenithLength/(cos(zenithAngle)+0.15*pow(93.885-((zenithAngle*180.0)/pi),-1.253));\nfloat sM=mieZenithLength/(cos(zenithAngle)+0.15*pow(93.885-((zenithAngle*180.0)/pi),-1.253));\nvec3 Fex=exp(-(betaR*sR+betaM*sM));\nfloat cosTheta=dot(normalize(vPositionW-cameraPosition),sunDirection);\nfloat rPhase=rayleighPhase(cosTheta*0.5+0.5);\nvec3 betaRTheta=betaR*rPhase;\nfloat mPhase=hgPhase(cosTheta,mieDirectionalG);\nvec3 betaMTheta=betaM*mPhase;\nvec3 Lin=pow(sunE*((betaRTheta+betaMTheta)/(betaR+betaM))*(1.0-Fex),vec3(1.5));\nLin*=mix(vec3(1.0),pow(sunE*((betaRTheta+betaMTheta)/(betaR+betaM))*Fex,vec3(1.0/2.0)),clamp(pow(1.0-dot(up,sunDirection),5.0),0.0,1.0));\nvec3 direction=normalize(vPositionW-cameraPosition);\nfloat theta=acos(direction.y);\nfloat phi=atan(direction.z,direction.x);\nvec2 uv=vec2(phi,theta)/vec2(2.0*pi,pi)+vec2(0.5,0.0);\nvec3 L0=vec3(0.1)*Fex;\nfloat sundisk=smoothstep(sunAngularDiameterCos,sunAngularDiameterCos+0.00002,cosTheta);\nL0+=(sunE*19000.0*Fex)*sundisk;\nvec3 whiteScale=1.0/Uncharted2Tonemap(vec3(W));\nvec3 texColor=(Lin+L0); \ntexColor*=0.04 ;\ntexColor+=vec3(0.0,0.001,0.0025)*0.3;\nfloat g_fMaxLuminance=1.0;\nfloat fLumScaled=0.1/luminance; \nfloat fLumCompressed=(fLumScaled*(1.0+(fLumScaled/(g_fMaxLuminance*g_fMaxLuminance))))/(1.0+fLumScaled); \nfloat ExposureBias=fLumCompressed;\nvec3 curr=Uncharted2Tonemap((log2(2.0/pow(luminance,4.0)))*texColor);\n\n\n\nvec3 retColor=curr*whiteScale;\n\n\nfloat alpha=1.0;\n#ifdef VERTEXCOLOR\nretColor.rgb*=vColor.rgb;\n#endif\n#ifdef VERTEXALPHA\nalpha*=vColor.a;\n#endif\n\nvec4 color=clamp(vec4(retColor.rgb,alpha),0.0,1.0);\n\n#include<fogFragment>\ngl_FragColor=color;\n}\n";
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