@kitware/vtk.js/Rendering/OpenGL/SurfaceLIC/glsl/vtkLineIntegralConvolution2D_CE.glsl.js

Visualization Toolkit for the Web

var vtkLineIntegralConvolution2D_CE = "//VTK::System::Dec\n\n//=========================================================================\n//\n//  Program:   Visualization Toolkit\n//  Module:    vtkLineIntegralConvolution2D_CE.glsl\n//\n//  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen\n//  All rights reserved.\n//  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.\n//\n//     This software is distributed WITHOUT ANY WARRANTY; without even\n//     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR\n//     PURPOSE.  See the above copyright notice for more information.\n//\n//=========================================================================\n\n// gray scale contrast enhance stage implemented via histogram stretching\n// if the min and max are tweaked it can generate out-of-range values\n// these will be clamped in 0 to 1\n\n// the output of this shader\nlayout(location = 0) out vec4 LICOutput;\nlayout(location = 1) out vec4 SeedOutput;\n\n\nuniform sampler2D texLIC;  // most recent lic pass\nuniform float uMin;        // min gray scale color value\nuniform float uMaxMinDiff; // max-min\n\nin vec2 tcoordVC;\n\nvoid main( void )\n{\n  vec4 lic = texture2D(texLIC, tcoordVC.st);\n  if (lic.g!=0.0)\n    {\n    LICOutput = lic;\n    }\n  else\n    {\n    float CElic = clamp((lic.r - uMin)/uMaxMinDiff, 0.0, 1.0);\n    LICOutput = vec4(CElic, lic.gb, 1.0);\n    }\n    SeedOutput = vec4(0.0, 0.0, 0.0, 0.0);\n}\n";

export { vtkLineIntegralConvolution2D_CE as v };