@kitware/vtk.js/Rendering/OpenGL/glsl/vtkStickMapperVS.glsl.js

Visualization Toolkit for the Web

var vtkStickMapperVS = "//VTK::System::Dec\n\n/*=========================================================================\n\n  Program:   Visualization Toolkit\n  Module:    vtkStickMapperVS.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// this shader implements imposters in OpenGL for Sticks\n\nattribute vec4 vertexMC;\nattribute vec3 orientMC;\nattribute vec4 offsetMC;\nattribute float radiusMC;\n\n// optional normal declaration\n//VTK::Normal::Dec\n\n//VTK::Picking::Dec\n\n// Texture coordinates\n//VTK::TCoord::Dec\n\nuniform mat3 normalMatrix; // transform model coordinate directions to view coordinates\n\n// material property values\n//VTK::Color::Dec\n\n// clipping plane vars\n//VTK::Clip::Dec\n\n// camera and actor matrix values\n//VTK::Camera::Dec\n\nvarying vec4 vertexVCVSOutput;\nvarying float radiusVCVSOutput;\nvarying float lengthVCVSOutput;\nvarying vec3 centerVCVSOutput;\nvarying vec3 orientVCVSOutput;\n\nuniform int cameraParallel;\n\nvoid main()\n{\n  //VTK::Picking::Impl\n\n  //VTK::Color::Impl\n\n  //VTK::Normal::Impl\n\n  //VTK::TCoord::Impl\n\n  //VTK::Clip::Impl\n\n  vertexVCVSOutput = MCVCMatrix * vertexMC;\n  centerVCVSOutput = vertexVCVSOutput.xyz;\n  radiusVCVSOutput = radiusMC;\n  lengthVCVSOutput = length(orientMC);\n  orientVCVSOutput = normalMatrix * normalize(orientMC);\n\n  // make sure it is pointing out of the screen\n  if (orientVCVSOutput.z < 0.0)\n    {\n    orientVCVSOutput = -orientVCVSOutput;\n    }\n\n  // make the basis\n  vec3 xbase;\n  vec3 ybase;\n  vec3 dir = vec3(0.0,0.0,1.0);\n  if (cameraParallel == 0)\n    {\n    dir = normalize(-vertexVCVSOutput.xyz);\n    }\n  if (abs(dot(dir,orientVCVSOutput)) == 1.0)\n    {\n    xbase = normalize(cross(vec3(0.0,1.0,0.0),orientVCVSOutput));\n    ybase = cross(xbase,orientVCVSOutput);\n    }\n  else\n    {\n    xbase = normalize(cross(orientVCVSOutput,dir));\n    ybase = cross(orientVCVSOutput,xbase);\n    }\n\n  vec3 offsets = offsetMC.xyz*2.0-1.0;\n  vertexVCVSOutput.xyz = vertexVCVSOutput.xyz +\n    radiusVCVSOutput*offsets.x*xbase +\n    radiusVCVSOutput*offsets.y*ybase +\n    0.5*lengthVCVSOutput*offsets.z*orientVCVSOutput;\n\n  gl_Position = VCPCMatrix * vertexVCVSOutput;\n}\n";

export { vtkStickMapperVS as v };