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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 | 1x 1x 1x 1x | import * as macro from 'vtk.js/Sources/macros';
import vtkOpenGLPolyDataMapper from 'vtk.js/Sources/Rendering/OpenGL/PolyDataMapper';
import vtkShaderProgram from 'vtk.js/Sources/Rendering/OpenGL/ShaderProgram';
import vtkOpenGLSurfaceLICInterface from 'vtk.js/Sources/Rendering/OpenGL/SurfaceLIC/SurfaceLICInterface';
import vtkSurfaceLICInterface from 'vtk.js/Sources/Rendering/Core/SurfaceLICInterface';
import { registerOverride } from 'vtk.js/Sources/Rendering/OpenGL/ViewNodeFactory';
const { vtkErrorMacro } = macro;
// ----------------------------------------------------------------------------
// vtkOpenGLSurfaceLICMapper methods
// ----------------------------------------------------------------------------
function vtkOpenGLSurfaceLICMapper(publicAPI, model) {
model.classHierarchy.push('vtkOpenGLSurfaceLICMapper');
const superClass = { ...publicAPI };
publicAPI.getNeedToRebuildShaders = (cellBO, ren, actor) =>
model.rebuildLICShaders ||
superClass.getNeedToRebuildShaders(cellBO, ren, actor);
publicAPI.replaceShaderValues = (shaders, ren, actor) => {
const prevComplexity = model.lastBoundBO.getReferenceByName(
'lastLightComplexity'
);
// add some code to handle the LIC vectors and mask
let VSSource = shaders.Vertex;
let FSSource = shaders.Fragment;
const array = model.renderable.getInputArrayToProcess(0);
if (array && model.canDrawLIC) {
FSSource = vtkShaderProgram.substitute(FSSource, '//VTK::Output::Dec', [
'//VTK::Output::Dec',
'layout(location = 2) out vec4 vectorTexture;',
'layout(location = 3) out vec4 maskVectorTexture;',
]).result;
const arrayName = array.getName();
const attributeName = `${arrayName}MC`;
// We need normals even with no lighting
if (prevComplexity === 0) {
model.lastBoundBO.set({ lastLightComplexity: 1 }, true);
}
VSSource = vtkShaderProgram.substitute(VSSource, '//VTK::TCoord::Dec', [
`attribute vec3 ${attributeName};`,
'out vec3 licOutput;',
'//VTK::TCoord::Dec',
]).result;
VSSource = vtkShaderProgram.substitute(VSSource, '//VTK::TCoord::Impl', [
`licOutput = ${attributeName};`,
'//VTK::TCoord::Impl',
]).result;
// 0/1, when 1 V is projected to surface for |V| computation.
FSSource = vtkShaderProgram.substitute(FSSource, '//VTK::TCoord::Dec', [
'uniform int uMaskOnSurface;',
'uniform mat3 normalMatrix;',
'in vec3 licOutput;',
'//VTK::TCoord::Dec',
]).result;
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::TCoord::Impl',
[
'// projected vectors',
' vec3 tcoordLIC = normalMatrix * licOutput;',
' vec3 normN = normalize(normalVCVSOutput);',
' float k = dot(tcoordLIC, normN);',
' vec3 projected = (tcoordLIC - k*normN);',
' vectorTexture = vec4(projected.x, projected.y, 0.0 , 1.0);',
'// vectors for fragment masking',
' if (uMaskOnSurface == 0)',
' {',
' maskVectorTexture = vec4(licOutput, 1.0);',
' }',
' else',
' {',
' maskVectorTexture = vec4(projected.x, projected.y, 0.0 , 1.0);',
' }',
'//VTK::TCoord::Impl',
],
false
).result;
shaders.Vertex = VSSource;
}
model.rebuildLICShaders = false;
shaders.Fragment = FSSource;
superClass.replaceShaderValues(shaders, ren, actor);
if (prevComplexity > 0) {
model.lastBoundBO.set({ lastLightComplexity: prevComplexity }, true);
}
};
publicAPI.setMapperShaderParameters = (cellBO, ren, actor) => {
superClass.setMapperShaderParameters(cellBO, ren, actor);
if (model.canDrawLIC) {
cellBO.getProgram().setUniformi('uMaskOnSurface', model.maskOnSurface);
}
};
publicAPI.getNeedToRebuildBufferObjects = (ren, actor) =>
model.rebuildLICBuffers ||
superClass.getNeedToRebuildBufferObjects(ren, actor);
publicAPI.buildBufferObjects = (ren, actor) => {
if (model.canDrawLIC) {
const array = model.renderable.getInputArrayToProcess(0);
if (array && array.getNumberOfComponents() > 1) {
model.renderable.setCustomShaderAttributes([array.getName()]);
}
}
model.rebuildLICBuffers = false;
superClass.buildBufferObjects(ren, actor);
};
publicAPI.pushState = (gl) => {
model.stateCache = {
[gl.BLEND]: gl.isEnabled(gl.BLEND),
[gl.DEPTH_TEST]: gl.isEnabled(gl.DEPTH_TEST),
[gl.SCISSOR_TEST]: gl.isEnabled(gl.SCISSOR_TEST),
[gl.CULL_FACE]: gl.isEnabled(gl.CULL_FACE),
};
};
publicAPI.popState = (gl) => {
const apply = (param) =>
model.stateCache[param] ? gl.enable(param) : gl.disable(param);
apply(gl.BLEND);
apply(gl.DEPTH_TEST);
apply(gl.SCISSOR_TEST);
apply(gl.CULL_FACE);
};
publicAPI.renderPiece = (ren, actor) => {
let canDrawLIC = true;
// Check for gl compatibility
const gl2 = model._openGLRenderWindow.getWebgl2();
if (!gl2) {
vtkErrorMacro('SurfaceLICMapper Requires WebGL 2');
canDrawLIC = false;
}
// Check for required extensions
if (
!model.context.getExtension('EXT_color_buffer_float') ||
!model.context.getExtension('OES_texture_float_linear')
) {
vtkErrorMacro(
'SurfaceLICMapper requires the EXT_color_buffer_float and OES_texture_float_linear WebGL2 extensions.'
);
canDrawLIC = false;
}
// Check for input
model.currentInput = model.renderable.getInputData();
if (!model.currentInput) {
vtkErrorMacro('No input');
canDrawLIC = false;
}
// Make sure LIC interfaces are present and configured
let licInterface = model.renderable.getLicInterface();
if (!licInterface) {
licInterface = vtkSurfaceLICInterface.newInstance();
model.renderable.setLicInterface(licInterface);
}
if (!model.openGLLicInterface) {
model.openGLLicInterface = vtkOpenGLSurfaceLICInterface.newInstance();
}
if (licInterface !== model.openGLLicInterface.getLicInterface()) {
model.openGLLicInterface.setLicInterface(licInterface);
}
// Check for input vectors
const array = model.renderable.getInputArrayToProcess(0);
if (
licInterface.getEnableLIC() &&
(!array || array.getNumberOfComponents() < 2)
) {
vtkErrorMacro('No vector input array');
canDrawLIC = false;
}
if (!licInterface.getEnableLIC()) {
canDrawLIC = false;
}
if (model.canDrawLIC !== canDrawLIC) {
model.rebuildLICShaders = true;
model.rebuildLICBuffers = true;
}
model.canDrawLIC = canDrawLIC;
// Necessary conditions are not met. Fallback to polydataMapper
if (!canDrawLIC || !licInterface.getEnableLIC()) {
superClass.renderPiece(ren, actor);
return;
}
// apply faceCulling
const gl = model.context;
const backfaceCulling = actor.getProperty().getBackfaceCulling();
const frontfaceCulling = actor.getProperty().getFrontfaceCulling();
if (!backfaceCulling && !frontfaceCulling) {
model._openGLRenderWindow.disableCullFace();
} else if (frontfaceCulling) {
model._openGLRenderWindow.enableCullFace();
gl.cullFace(gl.FRONT);
} else {
model._openGLRenderWindow.enableCullFace();
gl.cullFace(gl.BACK);
}
const windowSize = model._openGLRenderWindow.getSize();
const size = windowSize.map((i) =>
Math.round(i * licInterface.getViewPortScale())
);
model.openGLLicInterface.setSize(size);
model.openGLLicInterface.setOpenGLRenderWindow(model._openGLRenderWindow);
model.openGLLicInterface.setContext(model.context);
// Pre-render
publicAPI.pushState(model.context);
model.openGLLicInterface.initializeResources();
model.openGLLicInterface.prepareForGeometry();
publicAPI.popState(model.context);
// Render
superClass.renderPieceStart(ren, actor);
superClass.renderPieceDraw(ren, actor);
superClass.renderPieceFinish(ren, actor);
// Post
publicAPI.pushState(model.context);
model.VBOBuildTime.modified();
model.openGLLicInterface.completedGeometry();
model.context.disable(model.context.CULL_FACE);
model.openGLLicInterface.applyLIC();
model.openGLLicInterface.combineColorsAndLIC();
model.openGLLicInterface.copyToScreen(windowSize);
publicAPI.popState(model.context);
};
}
const DEFAULT_VALUES = {
canDrawLIC: false,
rebuildLICShaders: false,
rebuildLICBuffers: false,
openGLLicInterface: null,
};
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Inherit
vtkOpenGLPolyDataMapper.extend(publicAPI, model, initialValues);
// Object methods
vtkOpenGLSurfaceLICMapper(publicAPI, model);
macro.setGet(publicAPI, model, ['openGLLicInterface']);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkOpenGLSurfaceLICMapper'
);
// ----------------------------------------------------------------------------
export default { newInstance, extend };
// Register ourself to OpenGL backend if imported
registerOverride('vtkSurfaceLICMapper', newInstance);
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