text: import { Effect } from "@babylonjs/core/Materials/effect";
  import "@babylonjs/core/Shaders/ShadersInclude/fogFragmentDeclaration";
  import "@babylonjs/core/Shaders/ShadersInclude/fogFragment";
  import "@babylonjs/core/Shaders/ShadersInclude/imageProcessingCompatibility";
  var name = 'gridPixelShader';
  var shader = "#extension GL_OES_standard_derivatives : enable\n#define SQRT2 1.41421356\n#define PI 3.14159\nprecision highp float;\nuniform vec3 mainColor;\nuniform vec3 lineColor;\nuniform vec4 gridControl;\nuniform vec3 gridOffset;\n\nvarying vec3 vPosition;\nvarying vec3 vNormal;\n#include<fogFragmentDeclaration>\n\n#ifdef OPACITY\nvarying vec2 vOpacityUV;\nuniform sampler2D opacitySampler;\nuniform vec2 vOpacityInfos;\n#endif\nfloat getVisibility(float position) {\n\nfloat majorGridFrequency=gridControl.y;\nif (floor(position+0.5) == floor(position/majorGridFrequency+0.5)*majorGridFrequency)\n{\nreturn 1.0;\n}\nreturn gridControl.z;\n}\nfloat getAnisotropicAttenuation(float differentialLength) {\nconst float maxNumberOfLines=10.0;\nreturn clamp(1.0/(differentialLength+1.0)-1.0/maxNumberOfLines,0.0,1.0);\n}\nfloat isPointOnLine(float position,float differentialLength) {\nfloat fractionPartOfPosition=position-floor(position+0.5);\nfractionPartOfPosition/=differentialLength;\nfractionPartOfPosition=clamp(fractionPartOfPosition,-1.,1.);\nfloat result=0.5+0.5*cos(fractionPartOfPosition*PI);\nreturn result;\n}\nfloat contributionOnAxis(float position) {\nfloat differentialLength=length(vec2(dFdx(position),dFdy(position)));\ndifferentialLength*=SQRT2;\n\nfloat result=isPointOnLine(position,differentialLength);\n\nfloat visibility=getVisibility(position);\nresult*=visibility;\n\nfloat anisotropicAttenuation=getAnisotropicAttenuation(differentialLength);\nresult*=anisotropicAttenuation;\nreturn result;\n}\nfloat normalImpactOnAxis(float x) {\nfloat normalImpact=clamp(1.0-3.0*abs(x*x*x),0.0,1.0);\nreturn normalImpact;\n}\nvoid main(void) {\n\nfloat gridRatio=gridControl.x;\nvec3 gridPos=(vPosition+gridOffset.xyz)/gridRatio;\n\nfloat x=contributionOnAxis(gridPos.x);\nfloat y=contributionOnAxis(gridPos.y);\nfloat z=contributionOnAxis(gridPos.z);\n\nvec3 normal=normalize(vNormal);\nx*=normalImpactOnAxis(normal.x);\ny*=normalImpactOnAxis(normal.y);\nz*=normalImpactOnAxis(normal.z);\n\nfloat grid=clamp(x+y+z,0.,1.);\n\nvec3 color=mix(mainColor,lineColor,grid);\n#ifdef FOG\n#include<fogFragment>\n#endif\nfloat opacity=1.0;\n#ifdef TRANSPARENT\nopacity=clamp(grid,0.08,gridControl.w*grid);\n#endif\n#ifdef OPACITY\nopacity*=texture2D(opacitySampler,vOpacityUV).a;\n#endif\n\ngl_FragColor=vec4(color.rgb,opacity);\n#ifdef TRANSPARENT\n#ifdef PREMULTIPLYALPHA\ngl_FragColor.rgb*=opacity;\n#endif\n#else\n#endif\n#include<imageProcessingCompatibility>\n}";
  Effect.ShadersStore[name] = shader;
  /** @hidden */
  export var gridPixelShader = { name: name, shader: shader };
  //# sourceMappingURL=grid.fragment.js.map