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- var BABYLON;!(function(e){var n=(function(e){function n(){var n=e.call(this)||this;return n.CLIPPLANE=!1,n.POINTSIZE=!1,n.FOG=!1,n.VERTEXCOLOR=!1,n.VERTEXALPHA=!1,n._keys=Object.keys(n),n}return __extends(n,e),n})(e.MaterialDefines),t=(function(t){function i(i,o){var a=t.call(this,i,o)||this;return a.luminance=1,a.turbidity=10,a.rayleigh=2,a.mieCoefficient=.005,a.mieDirectionalG=.8,a.distance=500,a.inclination=.49,a.azimuth=.25,a.sunPosition=new e.Vector3(0,100,0),a.useSunPosition=!1,a._cameraPosition=e.Vector3.Zero(),a._defines=new n,a._cachedDefines=new n,a}return __extends(i,t),i.prototype.needAlphaBlending=function(){return this.alpha<1},i.prototype.needAlphaTesting=function(){return!1},i.prototype.getAlphaTestTexture=function(){return null},i.prototype._checkCache=function(e,n,t){return!n||!(!n._materialDefines||!n._materialDefines.isEqual(this._defines))},i.prototype.isReady=function(t,i){if(this.checkReadyOnlyOnce&&this._wasPreviouslyReady)return!0;var o=this.getScene();if(!this.checkReadyOnEveryCall&&this._renderId===o.getRenderId()&&this._checkCache(o,t,i))return!0;o.getEngine();if(this._defines.reset(),o.clipPlane&&(this._defines.CLIPPLANE=!0),(this.pointsCloud||o.forcePointsCloud)&&(this._defines.POINTSIZE=!0),o.fogEnabled&&t&&t.applyFog&&o.fogMode!==e.Scene.FOGMODE_NONE&&this.fogEnabled&&(this._defines.FOG=!0),t&&t.useVertexColors&&t.isVerticesDataPresent(e.VertexBuffer.ColorKind)&&(this._defines.VERTEXCOLOR=!0,t.hasVertexAlpha&&(this._defines.VERTEXALPHA=!0)),!this._defines.isEqual(this._cachedDefines)||!this._effect){this._defines.cloneTo(this._cachedDefines),o.resetCachedMaterial();var a=new e.EffectFallbacks;this._defines.FOG&&a.addFallback(1,"FOG");var r=[e.VertexBuffer.PositionKind];this._defines.VERTEXCOLOR&&r.push(e.VertexBuffer.ColorKind);var s=this._defines.toString();this._effect=o.getEngine().createEffect("sky",r,["world","viewProjection","view","vFogInfos","vFogColor","pointSize","vClipPlane","luminance","turbidity","rayleigh","mieCoefficient","mieDirectionalG","sunPosition","cameraPosition"],[],s,a,this.onCompiled,this.onError)}return!!this._effect.isReady()&&(this._renderId=o.getRenderId(),this._wasPreviouslyReady=!0,t&&(t._materialDefines||(t._materialDefines=new n),this._defines.cloneTo(t._materialDefines)),!0)},i.prototype.bindOnlyWorldMatrix=function(e){this._effect.setMatrix("world",e)},i.prototype.bind=function(n,i){var o=this.getScene();if(this.bindOnlyWorldMatrix(n),this._effect.setMatrix("viewProjection",o.getTransformMatrix()),o.getCachedMaterial()!==this){if(o.clipPlane){var a=o.clipPlane;this._effect.setFloat4("vClipPlane",a.normal.x,a.normal.y,a.normal.z,a.d)}this.pointsCloud&&this._effect.setFloat("pointSize",this.pointSize)}o.fogEnabled&&i.applyFog&&o.fogMode!==e.Scene.FOGMODE_NONE&&this._effect.setMatrix("view",o.getViewMatrix()),e.MaterialHelper.BindFogParameters(o,i,this._effect);var r=o.activeCamera;if(r){var s=r.getWorldMatrix();this._cameraPosition.x=s.m[12],this._cameraPosition.y=s.m[13],this._cameraPosition.z=s.m[14],this._effect.setVector3("cameraPosition",this._cameraPosition)}if(this.luminance>0&&this._effect.setFloat("luminance",this.luminance),this._effect.setFloat("turbidity",this.turbidity),this._effect.setFloat("rayleigh",this.rayleigh),this._effect.setFloat("mieCoefficient",this.mieCoefficient),this._effect.setFloat("mieDirectionalG",this.mieDirectionalG),!this.useSunPosition){var c=Math.PI*(this.inclination-.5),l=2*Math.PI*(this.azimuth-.5);this.sunPosition.x=this.distance*Math.cos(l),this.sunPosition.y=this.distance*Math.sin(l)*Math.sin(c),this.sunPosition.z=this.distance*Math.sin(l)*Math.cos(c)}this._effect.setVector3("sunPosition",this.sunPosition),t.prototype.bind.call(this,n,i)},i.prototype.getAnimatables=function(){return[]},i.prototype.dispose=function(e){t.prototype.dispose.call(this,e)},i.prototype.clone=function(n){var t=this;return e.SerializationHelper.Clone((function(){return new i(n,t.getScene())}),this)},i.prototype.serialize=function(){var n=e.SerializationHelper.Serialize(this);return n.customType="BABYLON.SkyMaterial",n},i.Parse=function(n,t,o){return e.SerializationHelper.Parse((function(){return new i(n.name,t)}),n,t,o)},i})(e.Material);__decorate([e.serialize()],t.prototype,"luminance",void 0),__decorate([e.serialize()],t.prototype,"turbidity",void 0),__decorate([e.serialize()],t.prototype,"rayleigh",void 0),__decorate([e.serialize()],t.prototype,"mieCoefficient",void 0),__decorate([e.serialize()],t.prototype,"mieDirectionalG",void 0),__decorate([e.serialize()],t.prototype,"distance",void 0),__decorate([e.serialize()],t.prototype,"inclination",void 0),__decorate([e.serialize()],t.prototype,"azimuth",void 0),__decorate([e.serializeAsVector3()],t.prototype,"sunPosition",void 0),__decorate([e.serialize()],t.prototype,"useSunPosition",void 0),e.SkyMaterial=t})(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}";
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