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3x 10x 4x 4x 10x 10x 10x 4x 10x 3x 3x 3x 3x 3x 3x 7x 7x 7x 10x 10x 10x 10x 11x 10x 10x 10x 10x 10x 10x 10x 4x 10x 10x 10x 4x 10x 10x 10x 10x 4x 10x 10x 10x 10x 17x 17x 17x 51x 51x 51x 51x 17x 11x 18x 18x 18x 18x 18x 18x 18x 18x 1x 17x 17x 17x 17x 17x 17x 17x 17x 17x 18x 10x 1x 1x 1x 1x 1x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 36x 36x 36x 9x 9x 10x 10x 11x 5x 1x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 11x 1x 1x | import * as macro from 'vtk.js/Sources/macros';
import { mat4, mat3, vec3 } from 'gl-matrix';
import vtkClosedPolyLineToSurfaceFilter from 'vtk.js/Sources/Filters/General/ClosedPolyLineToSurfaceFilter';
import vtkCutter from 'vtk.js/Sources/Filters/Core/Cutter';
import vtkDataArray from 'vtk.js/Sources/Common/Core/DataArray';
import vtkHelper from 'vtk.js/Sources/Rendering/OpenGL/Helper';
import vtkImageDataOutlineFilter from 'vtk.js/Sources/Filters/General/ImageDataOutlineFilter';
import vtkMath from 'vtk.js/Sources/Common/Core/Math';
import vtkOpenGLTexture from 'vtk.js/Sources/Rendering/OpenGL/Texture';
import vtkPlane from 'vtk.js/Sources/Common/DataModel/Plane';
import vtkPolyData from 'vtk.js/Sources/Common/DataModel/PolyData';
import vtkReplacementShaderMapper from 'vtk.js/Sources/Rendering/OpenGL/ReplacementShaderMapper';
import vtkShaderProgram from 'vtk.js/Sources/Rendering/OpenGL/ShaderProgram';
import vtkTransform from 'vtk.js/Sources/Common/Transform/Transform';
import vtkViewNode from 'vtk.js/Sources/Rendering/SceneGraph/ViewNode';
import vtkImageResliceMapperVS from 'vtk.js/Sources/Rendering/OpenGL/glsl/vtkImageResliceMapperVS.glsl';
import vtkImageResliceMapperFS from 'vtk.js/Sources/Rendering/OpenGL/glsl/vtkImageResliceMapperFS.glsl';
import { Filter } from 'vtk.js/Sources/Rendering/OpenGL/Texture/Constants';
import { InterpolationType } from 'vtk.js/Sources/Rendering/Core/ImageProperty/Constants';
import { Representation } from 'vtk.js/Sources/Rendering/Core/Property/Constants';
import { VtkDataTypes } from 'vtk.js/Sources/Common/Core/DataArray/Constants';
import { registerOverride } from 'vtk.js/Sources/Rendering/OpenGL/ViewNodeFactory';
const { vtkErrorMacro } = macro;
// ----------------------------------------------------------------------------
// helper methods
// ----------------------------------------------------------------------------
function computeFnToString(property, pwfun, numberOfComponents) {
if (pwfun) {
const iComps = property.getIndependentComponents();
return `${pwfun.getMTime()}-${iComps}-${numberOfComponents}`;
}
return '0';
}
function safeMatrixMultiply(matrixArray, matrixType, tmpMat) {
matrixType.identity(tmpMat);
return matrixArray.reduce((res, matrix, index) => {
if (index === 0) {
return matrix ? matrixType.copy(res, matrix) : matrixType.identity(res);
}
return matrix ? matrixType.multiply(res, res, matrix) : res;
}, tmpMat);
}
// ----------------------------------------------------------------------------
// vtkOpenGLImageResliceMapper methods
// ----------------------------------------------------------------------------
function vtkOpenGLImageResliceMapper(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkOpenGLImageResliceMapper');
publicAPI.buildPass = (prepass) => {
if (prepass) {
model.currentRenderPass = null;
model._openGLImageSlice = publicAPI.getFirstAncestorOfType(
'vtkOpenGLImageSlice'
);
model._openGLRenderer =
publicAPI.getFirstAncestorOfType('vtkOpenGLRenderer');
const ren = model._openGLRenderer.getRenderable();
model._openGLCamera = model._openGLRenderer.getViewNodeFor(
ren.getActiveCamera()
);
model._openGLRenderWindow = model._openGLRenderer.getParent();
model.context = model._openGLRenderWindow.getContext();
model.tris.setOpenGLRenderWindow(model._openGLRenderWindow);
}
};
publicAPI.translucentPass = (prepass, renderPass) => {
if (prepass) {
model.currentRenderPass = renderPass;
publicAPI.render();
}
};
publicAPI.zBufferPass = (prepass) => {
if (prepass) {
model.haveSeenDepthRequest = true;
model.renderDepth = true;
publicAPI.render();
model.renderDepth = false;
}
};
publicAPI.opaqueZBufferPass = (prepass) => publicAPI.zBufferPass(prepass);
publicAPI.opaquePass = (prepass) => {
if (prepass) {
publicAPI.render();
}
};
publicAPI.getCoincidentParameters = (ren, actor) => {
if (model.renderable.getResolveCoincidentTopology()) {
return model.renderable.getCoincidentTopologyPolygonOffsetParameters();
}
return null;
};
// Renders myself
publicAPI.render = () => {
const actor = model._openGLImageSlice.getRenderable();
const ren = model._openGLRenderer.getRenderable();
publicAPI.renderPiece(ren, actor);
};
publicAPI.renderPiece = (ren, actor) => {
publicAPI.invokeEvent({ type: 'StartEvent' });
model.renderable.update();
model.currentInput = model.renderable.getInputData();
if (!model.currentInput) {
vtkErrorMacro('No input!');
return;
}
publicAPI.updateResliceGeometry();
publicAPI.renderPieceStart(ren, actor);
publicAPI.renderPieceDraw(ren, actor);
publicAPI.renderPieceFinish(ren, actor);
publicAPI.invokeEvent({ type: 'EndEvent' });
};
publicAPI.renderPieceStart = (ren, actor) => {
// make sure the BOs are up to date
publicAPI.updateBufferObjects(ren, actor);
const iType = actor.getProperty().getInterpolationType();
Iif (iType === InterpolationType.NEAREST) {
model.openGLTexture.setMinificationFilter(Filter.NEAREST);
model.openGLTexture.setMagnificationFilter(Filter.NEAREST);
model.colorTexture.setMinificationFilter(Filter.NEAREST);
model.colorTexture.setMagnificationFilter(Filter.NEAREST);
model.pwfTexture.setMinificationFilter(Filter.NEAREST);
model.pwfTexture.setMagnificationFilter(Filter.NEAREST);
} else {
model.openGLTexture.setMinificationFilter(Filter.LINEAR);
model.openGLTexture.setMagnificationFilter(Filter.LINEAR);
model.colorTexture.setMinificationFilter(Filter.LINEAR);
model.colorTexture.setMagnificationFilter(Filter.LINEAR);
model.pwfTexture.setMinificationFilter(Filter.LINEAR);
model.pwfTexture.setMagnificationFilter(Filter.LINEAR);
}
// No buffer objects bound.
model.lastBoundBO = null;
};
publicAPI.renderPieceDraw = (ren, actor) => {
const gl = model.context;
// render the texture
model.openGLTexture.activate();
model.colorTexture.activate();
model.pwfTexture.activate();
// update shaders if required
publicAPI.updateShaders(model.tris, ren, actor);
// Finally draw
gl.drawArrays(gl.TRIANGLES, 0, model.tris.getCABO().getElementCount());
model.tris.getVAO().release();
model.openGLTexture.deactivate();
model.colorTexture.deactivate();
model.pwfTexture.deactivate();
};
publicAPI.renderPieceFinish = (ren, actor) => {};
publicAPI.updateBufferObjects = (ren, actor) => {
// Rebuild buffer objects if needed
if (publicAPI.getNeedToRebuildBufferObjects(ren, actor)) {
publicAPI.buildBufferObjects(ren, actor);
}
};
publicAPI.getNeedToRebuildBufferObjects = (ren, actor) =>
model.VBOBuildTime.getMTime() < publicAPI.getMTime() ||
model.VBOBuildTime.getMTime() < actor.getMTime() ||
model.VBOBuildTime.getMTime() < model.renderable.getMTime() ||
model.VBOBuildTime.getMTime() < actor.getProperty().getMTime() ||
model.VBOBuildTime.getMTime() < model.currentInput.getMTime() ||
model.VBOBuildTime.getMTime() < model.resliceGeom.getMTime();
publicAPI.buildBufferObjects = (ren, actor) => {
const image = model.currentInput;
Iif (!image) {
return;
}
const scalars = image.getPointData()?.getScalars();
Iif (!scalars) {
return;
}
if (model._scalars !== scalars) {
model._openGLRenderWindow.releaseGraphicsResourcesForObject(
model._scalars
);
model._scalars = scalars;
}
const numComp = scalars.getNumberOfComponents();
let toString = `${image.getMTime()}A${scalars.getMTime()}`;
const tex = model._openGLRenderWindow.getGraphicsResourceForObject(scalars);
const reBuildTex =
!tex?.vtkObj ||
tex?.hash !== toString ||
model.openGLTextureString !== toString;
if (reBuildTex) {
if (!model.openGLTexture) {
model.openGLTexture = vtkOpenGLTexture.newInstance();
model.openGLTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
}
// Build the image scalar texture
const dims = image.getDimensions();
// Use norm16 for the 3D texture if the extension is available
model.openGLTexture.setOglNorm16Ext(
model.context.getExtension('EXT_texture_norm16')
);
model.openGLTexture.releaseGraphicsResources(model._openGLRenderWindow);
model.openGLTexture.resetFormatAndType();
model.openGLTexture.create3DFilterableFromDataArray(
dims[0],
dims[1],
dims[2],
scalars
);
model.openGLTextureString = toString;
if (scalars) {
model._openGLRenderWindow.setGraphicsResourceForObject(
scalars,
model.openGLTexture,
model.openGLTextureString
);
}
} else E{
model.openGLTexture = tex.vtkObj;
model.openGLTextureString = tex.hash;
}
const ppty = actor.getProperty();
const iComps = ppty.getIndependentComponents();
const numIComps = iComps ? numComp : 1;
const textureHeight = iComps ? 2 * numIComps : 1;
const colorTransferFunc = ppty.getRGBTransferFunction();
toString = computeFnToString(ppty, colorTransferFunc, numIComps);
const cTex =
model._openGLRenderWindow.getGraphicsResourceForObject(colorTransferFunc);
const reBuildC =
!cTex?.vtkObj ||
cTex?.hash !== toString ||
model.colorTextureString !== toString;
if (reBuildC) {
const cWidth = 1024;
const cSize = cWidth * textureHeight * 3;
const cTable = new Uint8ClampedArray(cSize);
if (!model.colorTexture) {
model.colorTexture = vtkOpenGLTexture.newInstance();
model.colorTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
}
if (colorTransferFunc) {
const tmpTable = new Float32Array(cWidth * 3);
for (let c = 0; c < numIComps; c++) {
const cfun = ppty.getRGBTransferFunction(c);
const cRange = cfun.getRange();
cfun.getTable(cRange[0], cRange[1], cWidth, tmpTable, 1);
if (iComps) {
for (let i = 0; i < cWidth * 3; i++) {
cTable[c * cWidth * 6 + i] = 255.0 * tmpTable[i];
cTable[c * cWidth * 6 + i + cWidth * 3] = 255.0 * tmpTable[i];
}
} else {
for (let i = 0; i < cWidth * 3; i++) {
cTable[c * cWidth * 6 + i] = 255.0 * tmpTable[i];
}
}
}
model.colorTexture.releaseGraphicsResources(model._openGLRenderWindow);
model.colorTexture.resetFormatAndType();
model.colorTexture.create2DFromRaw(
cWidth,
textureHeight,
3,
VtkDataTypes.UNSIGNED_CHAR,
cTable
);
} else E{
for (let i = 0; i < cWidth * 3; ++i) {
cTable[i] = (255.0 * i) / ((cWidth - 1) * 3);
cTable[i + 1] = (255.0 * i) / ((cWidth - 1) * 3);
cTable[i + 2] = (255.0 * i) / ((cWidth - 1) * 3);
}
model.colorTexture.releaseGraphicsResources(model._openGLRenderWindow);
model.colorTexture.resetFormatAndType();
model.colorTexture.create2DFromRaw(
cWidth,
1,
3,
VtkDataTypes.UNSIGNED_CHAR,
cTable
);
}
model.colorTextureString = toString;
if (colorTransferFunc) {
model._openGLRenderWindow.setGraphicsResourceForObject(
colorTransferFunc,
model.colorTexture,
model.colorTextureString
);
}
} else E{
model.colorTexture = cTex.vtkObj;
model.colorTextureString = cTex.hash;
}
// Build piecewise function buffer. This buffer is used either
// for component weighting or opacity, depending on whether we're
// rendering components independently or not.
const pwFunc = ppty.getPiecewiseFunction();
toString = computeFnToString(ppty, pwFunc, numIComps);
const pwfTex =
model._openGLRenderWindow.getGraphicsResourceForObject(pwFunc);
// rebuild opacity tfun?
const reBuildPwf =
!pwfTex?.vtkObj ||
pwfTex?.hash !== toString ||
model.pwfTextureString !== toString;
if (reBuildPwf) {
const pwfWidth = 1024;
const pwfSize = pwfWidth * textureHeight;
const pwfTable = new Uint8ClampedArray(pwfSize);
if (!model.pwfTexture) {
model.pwfTexture = vtkOpenGLTexture.newInstance();
model.pwfTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
}
if (pwFunc) {
const pwfFloatTable = new Float32Array(pwfSize);
const tmpTable = new Float32Array(pwfWidth);
for (let c = 0; c < numIComps; ++c) {
const pwfun = ppty.getPiecewiseFunction(c);
Iif (pwfun === null) {
// Piecewise constant max if no function supplied for this component
pwfFloatTable.fill(1.0);
} else {
const pwfRange = pwfun.getRange();
pwfun.getTable(pwfRange[0], pwfRange[1], pwfWidth, tmpTable, 1);
// adjust for sample distance etc
if (iComps) {
for (let i = 0; i < pwfWidth; i++) {
pwfFloatTable[c * pwfWidth * 2 + i] = tmpTable[i];
pwfFloatTable[c * pwfWidth * 2 + i + pwfWidth] = tmpTable[i];
}
} else {
for (let i = 0; i < pwfWidth; i++) {
pwfFloatTable[c * pwfWidth * 2 + i] = tmpTable[i];
}
}
}
}
model.pwfTexture.releaseGraphicsResources(model._openGLRenderWindow);
model.pwfTexture.resetFormatAndType();
model.pwfTexture.create2DFromRaw(
pwfWidth,
textureHeight,
1,
VtkDataTypes.FLOAT,
pwfFloatTable
);
} else E{
// default is opaque
pwfTable.fill(255.0);
model.pwfTexture.releaseGraphicsResources(model._openGLRenderWindow);
model.pwfTexture.resetFormatAndType();
model.pwfTexture.create2DFromRaw(
pwfWidth,
1,
1,
VtkDataTypes.UNSIGNED_CHAR,
pwfTable
);
}
model.pwfTextureString = toString;
if (pwFunc) {
model._openGLRenderWindow.setGraphicsResourceForObject(
pwFunc,
model.pwfTexture,
model.pwfTextureString
);
}
} else E{
model.pwfTexture = pwfTex.vtkObj;
model.pwfTextureString = pwfTex.hash;
}
const vboString = `${model.resliceGeom.getMTime()}A${model.renderable.getSlabThickness()}`;
if (
!model.tris.getCABO().getElementCount() ||
model.VBOBuildString !== vboString
) {
const points = vtkDataArray.newInstance({
numberOfComponents: 3,
values: model.resliceGeom.getPoints().getData(),
});
points.setName('points');
const cells = vtkDataArray.newInstance({
numberOfComponents: 1,
values: model.resliceGeom.getPolys().getData(),
});
const options = {
points,
cellOffset: 0,
};
if (model.renderable.getSlabThickness() > 0.0) {
const n = model.resliceGeom.getPointData().getNormals();
Iif (!n) {
vtkErrorMacro('Slab mode requested without normals');
} else {
options.normals = n;
}
}
model.tris
.getCABO()
.createVBO(cells, 'polys', Representation.SURFACE, options);
}
model.VBOBuildString = vboString;
model.VBOBuildTime.modified();
};
publicAPI.updateShaders = (cellBO, ren, actor) => {
model.lastBoundBO = cellBO;
// has something changed that would require us to recreate the shader?
if (publicAPI.getNeedToRebuildShaders(cellBO, ren, actor)) {
const shaders = { Vertex: null, Fragment: null, Geometry: null };
publicAPI.buildShaders(shaders, ren, actor);
// compile and bind the program if needed
const newShader = model._openGLRenderWindow
.getShaderCache()
.readyShaderProgramArray(
shaders.Vertex,
shaders.Fragment,
shaders.Geometry
);
// if the shader changed reinitialize the VAO
if (newShader !== cellBO.getProgram()) {
cellBO.setProgram(newShader);
// reset the VAO as the shader has changed
cellBO.getVAO().releaseGraphicsResources();
}
cellBO.getShaderSourceTime().modified();
} else {
model._openGLRenderWindow
.getShaderCache()
.readyShaderProgram(cellBO.getProgram());
}
cellBO.getVAO().bind();
publicAPI.setMapperShaderParameters(cellBO, ren, actor);
publicAPI.setCameraShaderParameters(cellBO, ren, actor);
publicAPI.setPropertyShaderParameters(cellBO, ren, actor);
};
publicAPI.setMapperShaderParameters = (cellBO, ren, actor) => {
const program = cellBO.getProgram();
if (
cellBO.getCABO().getElementCount() &&
(model.VBOBuildTime.getMTime() >
cellBO.getAttributeUpdateTime().getMTime() ||
cellBO.getShaderSourceTime().getMTime() >
cellBO.getAttributeUpdateTime().getMTime())
) {
// Set the 3D texture
if (program.isUniformUsed('texture1')) {
program.setUniformi('texture1', model.openGLTexture.getTextureUnit());
}
// Set the plane vertex attributes
if (program.isAttributeUsed('vertexWC')) {
Iif (
!cellBO
.getVAO()
.addAttributeArray(
program,
cellBO.getCABO(),
'vertexWC',
cellBO.getCABO().getVertexOffset(),
cellBO.getCABO().getStride(),
model.context.FLOAT,
3,
model.context.FALSE
)
) {
vtkErrorMacro('Error setting vertexWC in shader VAO.');
}
}
// If we are doing slab mode, we need normals
if (program.isAttributeUsed('normalWC')) {
Iif (
!cellBO
.getVAO()
.addAttributeArray(
program,
cellBO.getCABO(),
'normalWC',
cellBO.getCABO().getNormalOffset(),
cellBO.getCABO().getStride(),
model.context.FLOAT,
3,
model.context.FALSE
)
) {
vtkErrorMacro('Error setting normalWC in shader VAO.');
}
}
if (program.isUniformUsed('slabThickness')) {
program.setUniformf(
'slabThickness',
model.renderable.getSlabThickness()
);
}
if (program.isUniformUsed('spacing')) {
program.setUniform3fv('spacing', model.currentInput.getSpacing());
}
if (program.isUniformUsed('slabType')) {
program.setUniformi('slabType', model.renderable.getSlabType());
}
if (program.isUniformUsed('slabType')) {
program.setUniformi('slabType', model.renderable.getSlabType());
}
if (program.isUniformUsed('slabTrapezoid')) {
program.setUniformi(
'slabTrapezoid',
model.renderable.getSlabTrapezoidIntegration()
);
}
const shiftScaleEnabled = cellBO.getCABO().getCoordShiftAndScaleEnabled();
const inverseShiftScaleMatrix = shiftScaleEnabled
? cellBO.getCABO().getInverseShiftAndScaleMatrix()
: null;
// Set the world->texture matrix
if (program.isUniformUsed('WCTCMatrix')) {
const image = model.currentInput;
const dim = image.getDimensions();
mat4.copy(model.tmpMat4, image.getIndexToWorld());
mat4.scale(model.tmpMat4, model.tmpMat4, dim);
mat4.invert(model.tmpMat4, model.tmpMat4);
if (inverseShiftScaleMatrix) {
mat4.multiply(model.tmpMat4, model.tmpMat4, inverseShiftScaleMatrix);
}
program.setUniformMatrix('WCTCMatrix', model.tmpMat4);
}
if (program.isUniformUsed('vboScaling')) {
program.setUniform3fv('vboScaling', cellBO.getCABO().getCoordScale());
}
cellBO.getAttributeUpdateTime().modified();
}
// Depth request
Iif (model.haveSeenDepthRequest) {
cellBO
.getProgram()
.setUniformi('depthRequest', model.renderDepth ? 1 : 0);
}
// handle coincident
if (cellBO.getProgram().isUniformUsed('coffset')) {
const cp = publicAPI.getCoincidentParameters(ren, actor);
cellBO.getProgram().setUniformf('coffset', cp.offset);
// cfactor isn't always used when coffset is.
if (cellBO.getProgram().isUniformUsed('cfactor')) {
cellBO.getProgram().setUniformf('cfactor', cp.factor);
}
}
};
publicAPI.setCameraShaderParameters = (cellBO, ren, actor) => {
// [WMVP]C == {world, model, view, projection} coordinates
// e.g. WCPC == world to projection coordinate transformation
const keyMats = model._openGLCamera.getKeyMatrices(ren);
const actMats = model._openGLImageSlice.getKeyMatrices();
const shiftScaleEnabled = cellBO.getCABO().getCoordShiftAndScaleEnabled();
const inverseShiftScaleMatrix = shiftScaleEnabled
? cellBO.getCABO().getInverseShiftAndScaleMatrix()
: null;
const program = cellBO.getProgram();
if (program.isUniformUsed('MCPCMatrix')) {
mat4.identity(model.tmpMat4);
program.setUniformMatrix(
'MCPCMatrix',
safeMatrixMultiply(
[keyMats.wcpc, actMats.mcwc, inverseShiftScaleMatrix],
mat4,
model.tmpMat4
)
);
}
Iif (program.isUniformUsed('MCVCMatrix')) {
mat4.identity(model.tmpMat4);
program.setUniformMatrix(
'MCVCMatrix',
safeMatrixMultiply(
[keyMats.wcvc, actMats.mcwc, inverseShiftScaleMatrix],
mat4,
model.tmpMat4
)
);
}
};
publicAPI.setPropertyShaderParameters = (cellBO, ren, actor) => {
const program = cellBO.getProgram();
const ppty = actor.getProperty();
const opacity = ppty.getOpacity();
program.setUniformf('opacity', opacity);
// Component mix
// Independent components: Mixed according to component weights
// Dependent components: Mixed using the following logic:
// - 2 comps => LA
// - 3 comps => RGB + opacity from pwf
// - 4 comps => RGBA
const numComp = model.openGLTexture.getComponents();
const iComps = ppty.getIndependentComponents();
if (iComps) {
for (let i = 0; i < numComp; ++i) {
program.setUniformf(`mix${i}`, ppty.getComponentWeight(i));
}
}
// Color opacity map
const volInfo = model.openGLTexture.getVolumeInfo();
// three levels of shift scale combined into one
// for performance in the fragment shader
for (let i = 0; i < numComp; i++) {
let cw = ppty.getColorWindow();
let cl = ppty.getColorLevel();
const target = iComps ? i : 0;
const cfun = ppty.getRGBTransferFunction(target);
Iif (cfun && ppty.getUseLookupTableScalarRange()) {
const cRange = cfun.getRange();
cw = cRange[1] - cRange[0];
cl = 0.5 * (cRange[1] + cRange[0]);
}
const scale = volInfo.scale[i] / cw;
const shift = (volInfo.offset[i] - cl) / cw + 0.5;
program.setUniformf(`cshift${i}`, shift);
program.setUniformf(`cscale${i}`, scale);
}
const texColorUnit = model.colorTexture.getTextureUnit();
program.setUniformi('colorTexture1', texColorUnit);
// pwf shift/scale
for (let i = 0; i < numComp; i++) {
let pwfScale = 1.0;
let pwfShift = 0.0;
const target = iComps ? i : 0;
const pwfun = ppty.getPiecewiseFunction(target);
if (pwfun) {
const pwfRange = pwfun.getRange();
const length = pwfRange[1] - pwfRange[0];
const mid = 0.5 * (pwfRange[0] + pwfRange[1]);
pwfScale = volInfo.scale[i] / length;
pwfShift = (volInfo.offset[i] - mid) / length + 0.5;
}
program.setUniformf(`pwfshift${i}`, pwfShift);
program.setUniformf(`pwfscale${i}`, pwfScale);
}
const texOpacityUnit = model.pwfTexture.getTextureUnit();
program.setUniformi('pwfTexture1', texOpacityUnit);
// Background color
program.setUniform4fv(
'backgroundColor',
model.renderable.getBackgroundColor()
);
};
publicAPI.getNeedToRebuildShaders = (cellBO, ren, actor) => {
// has something changed that would require us to recreate the shader?
// candidates are
// property modified (representation interpolation and lighting)
// input modified
// light complexity changed
// render pass shader replacement changed
const tNumComp = model.openGLTexture.getComponents();
const iComp = actor.getProperty().getIndependentComponents();
const slabTh = model.renderable.getSlabThickness();
const slabType = model.renderable.getSlabType();
const slabTrap = model.renderable.getSlabTrapezoidIntegration();
// has the render pass shader replacement changed? Two options
let needRebuild = false;
Iif (
(!model.currentRenderPass && model.lastRenderPassShaderReplacement) ||
(model.currentRenderPass &&
model.currentRenderPass.getShaderReplacement() !==
model.lastRenderPassShaderReplacement)
) {
needRebuild = true;
}
if (
needRebuild ||
model.lastHaveSeenDepthRequest !== model.haveSeenDepthRequest ||
cellBO.getProgram()?.getHandle() === 0 ||
model.lastTextureComponents !== tNumComp ||
model.lastIndependentComponents !== iComp ||
model.lastSlabThickness !== slabTh ||
model.lastSlabType !== slabType ||
model.lastSlabTrapezoidIntegration !== slabTrap
) {
model.lastHaveSeenDepthRequest = model.haveSeenDepthRequest;
model.lastTextureComponents = tNumComp;
model.lastIndependentComponents = iComp;
model.lastSlabThickness = slabTh;
model.lastSlabType = slabType;
model.lastSlabTrapezoidIntegration = slabTrap;
return true;
}
return false;
};
publicAPI.getShaderTemplate = (shaders, ren, actor) => {
shaders.Vertex = vtkImageResliceMapperVS;
shaders.Fragment = vtkImageResliceMapperFS;
shaders.Geometry = '';
};
publicAPI.replaceShaderValues = (shaders, ren, actor) => {
publicAPI.replaceShaderTCoord(shaders, ren, actor);
publicAPI.replaceShaderPositionVC(shaders, ren, actor);
Iif (model.haveSeenDepthRequest) {
let FSSource = shaders.Fragment;
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::ZBuffer::Dec',
'uniform int depthRequest;'
).result;
FSSource = vtkShaderProgram.substitute(FSSource, '//VTK::ZBuffer::Impl', [
'if (depthRequest == 1) {',
'float iz = floor(gl_FragCoord.z*65535.0 + 0.1);',
'float rf = floor(iz/256.0)/255.0;',
'float gf = mod(iz,256.0)/255.0;',
'gl_FragData[0] = vec4(rf, gf, 0.0, 1.0); }',
]).result;
shaders.Fragment = FSSource;
}
publicAPI.replaceShaderCoincidentOffset(shaders, ren, actor);
};
publicAPI.replaceShaderTCoord = (shaders, ren, actor) => {
let VSSource = shaders.Vertex;
const GSSource = shaders.Geometry;
let FSSource = shaders.Fragment;
const tcoordVSDec = ['uniform mat4 WCTCMatrix;', 'out vec3 fragTexCoord;'];
const slabThickness = model.renderable.getSlabThickness();
VSSource = vtkShaderProgram.substitute(
VSSource,
'//VTK::TCoord::Dec',
tcoordVSDec
).result;
const tcoordVSImpl = ['fragTexCoord = (WCTCMatrix * vertexWC).xyz;'];
VSSource = vtkShaderProgram.substitute(
VSSource,
'//VTK::TCoord::Impl',
tcoordVSImpl
).result;
const tNumComp = model.openGLTexture.getComponents();
const iComps = actor.getProperty().getIndependentComponents();
let tcoordFSDec = [
'in vec3 fragTexCoord;',
'uniform highp sampler3D texture1;',
'uniform mat4 WCTCMatrix;',
// color shift and scale
'uniform float cshift0;',
'uniform float cscale0;',
// pwf shift and scale
'uniform float pwfshift0;',
'uniform float pwfscale0;',
// color and pwf textures
'uniform sampler2D colorTexture1;',
'uniform sampler2D pwfTexture1;',
// opacity
'uniform float opacity;',
// background color
'uniform vec4 backgroundColor;',
];
if (iComps) {
for (let comp = 1; comp < tNumComp; comp++) {
tcoordFSDec = tcoordFSDec.concat([
// color shift and scale
`uniform float cshift${comp};`,
`uniform float cscale${comp};`,
// weighting shift and scale
`uniform float pwfshift${comp};`,
`uniform float pwfscale${comp};`,
]);
}
// the heights defined below are the locations
// for the up to four components of the tfuns
// the tfuns have a height of 2XnumComps pixels so the
// values are computed to hit the middle of the two rows
// for that component
switch (tNumComp) {
case 1:
tcoordFSDec = tcoordFSDec.concat([
'uniform float mix0;',
'#define height0 0.5',
]);
break;
case 2:
tcoordFSDec = tcoordFSDec.concat([
'uniform float mix0;',
'uniform float mix1;',
'#define height0 0.25',
'#define height1 0.75',
]);
break;
case 3:
tcoordFSDec = tcoordFSDec.concat([
'uniform float mix0;',
'uniform float mix1;',
'uniform float mix2;',
'#define height0 0.17',
'#define height1 0.5',
'#define height2 0.83',
]);
break;
case 4:
tcoordFSDec = tcoordFSDec.concat([
'uniform float mix0;',
'uniform float mix1;',
'uniform float mix2;',
'uniform float mix3;',
'#define height0 0.125',
'#define height1 0.375',
'#define height2 0.625',
'#define height3 0.875',
]);
break;
default:
vtkErrorMacro('Unsupported number of independent coordinates.');
}
}
if (slabThickness > 0.0) {
tcoordFSDec = tcoordFSDec.concat([
'uniform vec3 spacing;',
'uniform float slabThickness;',
'uniform int slabType;',
'uniform int slabTrapezoid;',
'uniform vec3 vboScaling;',
]);
tcoordFSDec = tcoordFSDec.concat([
'vec4 compositeValue(vec4 currVal, vec4 valToComp, int trapezoid)',
'{',
' vec4 retVal = vec4(1.0);',
' if (slabType == 0) // min',
' {',
' retVal = min(currVal, valToComp);',
' }',
' else if (slabType == 1) // max',
' {',
' retVal = max(currVal, valToComp);',
' }',
' else if (slabType == 3) // sum',
' {',
' retVal = currVal + (trapezoid > 0 ? 0.5 * valToComp : valToComp); ',
' }',
' else // mean',
' {',
' retVal = currVal + (trapezoid > 0 ? 0.5 * valToComp : valToComp); ',
' }',
' return retVal;',
'}',
]);
}
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::TCoord::Dec',
tcoordFSDec
).result;
let tcoordFSImpl = [
'if (any(greaterThan(fragTexCoord, vec3(1.0))) || any(lessThan(fragTexCoord, vec3(0.0))))',
'{',
' // set the background color and exit',
' gl_FragData[0] = backgroundColor;',
' return;',
'}',
'vec4 tvalue = texture(texture1, fragTexCoord);',
];
if (slabThickness > 0.0) {
tcoordFSImpl = tcoordFSImpl.concat([
'// Get the first and last samples',
'int numSlices = 1;',
'float scaling = min(min(spacing.x, spacing.y), spacing.z) * 0.5;',
'vec3 normalxspacing = scaling * normalWCVSOutput;',
'float distTraveled = length(normalxspacing);',
'int trapezoid = 0;',
'while (distTraveled < slabThickness * 0.5)',
'{',
' distTraveled += length(normalxspacing);',
' float fnumSlices = float(numSlices);',
' if (distTraveled > slabThickness * 0.5)',
' {',
' // Before stepping outside the slab, sample at the boundaries',
' normalxspacing = normalWCVSOutput * slabThickness * 0.5 / fnumSlices;',
' trapezoid = slabTrapezoid;',
' }',
' vec3 fragTCoordNeg = (WCTCMatrix * vec4(vertexWCVSOutput.xyz - fnumSlices * normalxspacing * vboScaling, 1.0)).xyz;',
' if (!any(greaterThan(fragTCoordNeg, vec3(1.0))) && !any(lessThan(fragTCoordNeg, vec3(0.0))))',
' {',
' vec4 newVal = texture(texture1, fragTCoordNeg);',
' tvalue = compositeValue(tvalue, newVal, trapezoid);',
' numSlices += 1;',
' }',
' vec3 fragTCoordPos = (WCTCMatrix * vec4(vertexWCVSOutput.xyz + fnumSlices * normalxspacing * vboScaling, 1.0)).xyz;',
' if (!any(greaterThan(fragTCoordNeg, vec3(1.0))) && !any(lessThan(fragTCoordNeg, vec3(0.0))))',
' {',
' vec4 newVal = texture(texture1, fragTCoordPos);',
' tvalue = compositeValue(tvalue, newVal, trapezoid);',
' numSlices += 1;',
' }',
'}',
'// Finally, if slab type is *mean*, divide the sum by the numSlices',
'if (slabType == 2)',
'{',
' tvalue = tvalue / float(numSlices);',
'}',
]);
}
if (iComps) {
const rgba = ['r', 'g', 'b', 'a'];
for (let comp = 0; comp < tNumComp; ++comp) {
tcoordFSImpl = tcoordFSImpl.concat([
`vec3 tcolor${comp} = mix${comp} * texture2D(colorTexture1, vec2(tvalue.${rgba[comp]} * cscale${comp} + cshift${comp}, height${comp})).rgb;`,
`float compWeight${comp} = mix${comp} * texture2D(pwfTexture1, vec2(tvalue.${rgba[comp]} * pwfscale${comp} + pwfshift${comp}, height${comp})).r;`,
]);
}
switch (tNumComp) {
case 1:
tcoordFSImpl = tcoordFSImpl.concat([
'gl_FragData[0] = vec4(tcolor0.rgb, compWeight0 * opacity);',
]);
break;
case 2:
tcoordFSImpl = tcoordFSImpl.concat([
'float weightSum = compWeight0 + compWeight1;',
'gl_FragData[0] = vec4(vec3((tcolor0.rgb * (compWeight0 / weightSum)) + (tcolor1.rgb * (compWeight1 / weightSum))), opacity);',
]);
break;
case 3:
tcoordFSImpl = tcoordFSImpl.concat([
'float weightSum = compWeight0 + compWeight1 + compWeight2;',
'gl_FragData[0] = vec4(vec3((tcolor0.rgb * (compWeight0 / weightSum)) + (tcolor1.rgb * (compWeight1 / weightSum)) + (tcolor2.rgb * (compWeight2 / weightSum))), opacity);',
]);
break;
case 4:
tcoordFSImpl = tcoordFSImpl.concat([
'float weightSum = compWeight0 + compWeight1 + compWeight2 + compWeight3;',
'gl_FragData[0] = vec4(vec3((tcolor0.rgb * (compWeight0 / weightSum)) + (tcolor1.rgb * (compWeight1 / weightSum)) + (tcolor2.rgb * (compWeight2 / weightSum)) + (tcolor3.rgb * (compWeight3 / weightSum))), opacity);',
]);
break;
default:
vtkErrorMacro('Unsupported number of independent coordinates.');
}
} else {
// dependent components
switch (tNumComp) {
case 1:
tcoordFSImpl = tcoordFSImpl.concat([
'// Dependent components',
'float intensity = tvalue.r;',
'vec3 tcolor = texture2D(colorTexture1, vec2(intensity * cscale0 + cshift0, 0.5)).rgb;',
'float scalarOpacity = texture2D(pwfTexture1, vec2(intensity * pwfscale0 + pwfshift0, 0.5)).r;',
'gl_FragData[0] = vec4(tcolor, scalarOpacity * opacity);',
]);
break;
case 2:
tcoordFSImpl = tcoordFSImpl.concat([
'float intensity = tvalue.r*cscale0 + cshift0;',
'gl_FragData[0] = vec4(texture2D(colorTexture1, vec2(intensity, 0.5)).rgb, pwfscale0*tvalue.g + pwfshift0);',
]);
break;
case 3:
tcoordFSImpl = tcoordFSImpl.concat([
'vec4 tcolor = cscale0*tvalue + cshift0;',
'gl_FragData[0] = vec4(texture2D(colorTexture1, vec2(tcolor.r,0.5)).r,',
' texture2D(colorTexture1, vec2(tcolor.g,0.5)).r,',
' texture2D(colorTexture1, vec2(tcolor.b,0.5)).r, opacity);',
]);
break;
default:
tcoordFSImpl = tcoordFSImpl.concat([
'vec4 tcolor = cscale0*tvalue + cshift0;',
'gl_FragData[0] = vec4(texture2D(colorTexture1, vec2(tcolor.r,0.5)).r,',
' texture2D(colorTexture1, vec2(tcolor.g,0.5)).r,',
' texture2D(colorTexture1, vec2(tcolor.b,0.5)).r, tcolor.a);',
]);
}
}
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::TCoord::Impl',
tcoordFSImpl
).result;
shaders.Vertex = VSSource;
shaders.Fragment = FSSource;
shaders.Geometry = GSSource;
};
publicAPI.replaceShaderPositionVC = (shaders, ren, actor) => {
let VSSource = shaders.Vertex;
const GSSource = shaders.Geometry;
let FSSource = shaders.Fragment;
const slabThickness = model.renderable.getSlabThickness();
let posVCVSDec = ['attribute vec4 vertexWC;'];
// Add a unique hash to the shader to ensure that the shader program is unique to this mapper.
posVCVSDec = posVCVSDec.concat([
`//${publicAPI.getMTime()}${model.resliceGeomUpdateString}`,
]);
if (slabThickness > 0.0) {
posVCVSDec = posVCVSDec.concat([
'attribute vec3 normalWC;',
'varying vec3 normalWCVSOutput;',
'varying vec4 vertexWCVSOutput;',
]);
}
VSSource = vtkShaderProgram.substitute(
VSSource,
'//VTK::PositionVC::Dec',
posVCVSDec
).result;
let posVCVSImpl = ['gl_Position = MCPCMatrix * vertexWC;'];
if (slabThickness > 0.0) {
posVCVSImpl = posVCVSImpl.concat([
'normalWCVSOutput = normalWC;',
'vertexWCVSOutput = vertexWC;',
]);
}
VSSource = vtkShaderProgram.substitute(
VSSource,
'//VTK::PositionVC::Impl',
posVCVSImpl
).result;
VSSource = vtkShaderProgram.substitute(VSSource, '//VTK::Camera::Dec', [
'uniform mat4 MCPCMatrix;',
'uniform mat4 MCVCMatrix;',
]).result;
let posVCFSDec = [];
if (slabThickness > 0.0) {
posVCFSDec = posVCFSDec.concat([
'varying vec3 normalWCVSOutput;',
'varying vec4 vertexWCVSOutput;',
]);
}
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::PositionVC::Dec',
posVCFSDec
).result;
shaders.Vertex = VSSource;
shaders.Geometry = GSSource;
shaders.Fragment = FSSource;
};
function isVectorAxisAligned(n) {
vtkMath.normalize(n);
const tmpN = [0, 0, 0];
for (let i = 0; i < 3; ++i) {
vec3.zero(tmpN);
tmpN[i] = 1.0;
const dotP = vtkMath.dot(n, tmpN);
Iif (dotP < -0.999 || dotP > 0.999) {
return [true, i];
}
}
return [false, 2];
}
publicAPI.updateResliceGeometry = () => {
let resGeomString = '';
const image = model.currentInput;
const imageBounds = image?.getBounds();
// Orthogonal slicing by default
let orthoSlicing = true;
let orthoAxis = 2;
const slicePD = model.renderable.getSlicePolyData();
const slicePlane = model.renderable.getSlicePlane();
if (slicePD) {
resGeomString = resGeomString.concat(`PolyData${slicePD.getMTime()}`);
} else if (slicePlane) {
resGeomString = resGeomString.concat(`Plane${slicePlane.getMTime()}`);
if (image) {
resGeomString = resGeomString.concat(`Image${image.getMTime()}`);
}
// Check to see if we can bypass oblique slicing related bounds computation
// Compute a world-to-image-orientation matrix.
// Ignore the translation component since we are
// using it on vectors rather than positions.
const w2io = mat3.fromValues(image?.getDirection());
mat3.invert(w2io, w2io);
// transform the cutting plane normal to image local coords
const imageLocalNormal = [...slicePlane.getNormal()];
vec3.transformMat3(imageLocalNormal, imageLocalNormal, w2io);
[orthoSlicing, orthoAxis] = isVectorAxisAligned(imageLocalNormal);
} else E{
// Create a default slice plane here
const plane = vtkPlane.newInstance();
plane.setNormal(0, 0, 1);
let bds = [0, 1, 0, 1, 0, 1];
if (image) {
bds = imageBounds;
}
plane.setOrigin(bds[0], bds[2], 0.5 * (bds[5] + bds[4]));
model.renderable.setSlicePlane(plane);
resGeomString = resGeomString.concat(`Plane${slicePlane?.getMTime()}`);
if (image) {
resGeomString = resGeomString.concat(`Image${image.getMTime()}`);
}
}
if (!model.resliceGeom || model.resliceGeomUpdateString !== resGeomString) {
if (slicePD) {
if (!model.resliceGeom) {
model.resliceGeom = vtkPolyData.newInstance();
}
model.resliceGeom.getPoints().setData(slicePD.getPoints().getData(), 3);
model.resliceGeom.getPolys().setData(slicePD.getPolys().getData(), 1);
model.resliceGeom
.getPointData()
.setNormals(slicePD.getPointData().getNormals());
} else if (slicePlane) {
if (!orthoSlicing) {
model.outlineFilter.setInputData(image);
model.cutter.setInputConnection(model.outlineFilter.getOutputPort());
model.cutter.setCutFunction(slicePlane);
model.lineToSurfaceFilter.setInputConnection(
model.cutter.getOutputPort()
);
model.lineToSurfaceFilter.update();
if (!model.resliceGeom) {
model.resliceGeom = vtkPolyData.newInstance();
}
const planePD = model.lineToSurfaceFilter.getOutputData();
model.resliceGeom
.getPoints()
.setData(planePD.getPoints().getData(), 3);
model.resliceGeom.getPolys().setData(planePD.getPolys().getData(), 1);
model.resliceGeom
.getPointData()
.setNormals(planePD.getPointData().getNormals());
// The above method does not generate point normals
// Set it manually here.
const n = slicePlane.getNormal();
const npts = model.resliceGeom.getNumberOfPoints();
vtkMath.normalize(n);
const normalsData = new Float32Array(npts * 3);
for (let i = 0; i < npts; ++i) {
normalsData[3 * i] = n[0];
normalsData[3 * i + 1] = n[1];
normalsData[3 * i + 2] = n[2];
}
const normals = vtkDataArray.newInstance({
numberOfComponents: 3,
values: normalsData,
name: 'Normals',
});
model.resliceGeom.getPointData().setNormals(normals);
} else E{
// Since the image-local normal is axis-aligned, we
// can quickly construct the cutting plane using indexToWorld transforms.
const ptsArray = new Float32Array(12);
const indexSpacePlaneOrigin = image.worldToIndex(
slicePlane.getOrigin(),
[0, 0, 0]
);
const otherAxes = [(orthoAxis + 1) % 3, (orthoAxis + 2) % 3].sort();
const dim = image.getDimensions();
const ext = [0, dim[0] - 1, 0, dim[1] - 1, 0, dim[2] - 1];
let ptIdx = 0;
for (let i = 0; i < 2; ++i) {
for (let j = 0; j < 2; ++j) {
ptsArray[ptIdx + orthoAxis] = indexSpacePlaneOrigin[orthoAxis];
ptsArray[ptIdx + otherAxes[0]] = ext[2 * otherAxes[0] + j];
ptsArray[ptIdx + otherAxes[1]] = ext[2 * otherAxes[1] + i];
ptIdx += 3;
}
}
model.transform.setMatrix(image.getIndexToWorld());
model.transform.transformPoints(ptsArray, ptsArray);
const cellArray = new Uint16Array(8);
cellArray[0] = 3;
cellArray[1] = 0;
cellArray[2] = 1;
cellArray[3] = 3;
cellArray[4] = 3;
cellArray[5] = 0;
cellArray[6] = 3;
cellArray[7] = 2;
const n = slicePlane.getNormal();
vtkMath.normalize(n);
const normalsData = new Float32Array(12);
for (let i = 0; i < 4; ++i) {
normalsData[3 * i] = n[0];
normalsData[3 * i + 1] = n[1];
normalsData[3 * i + 2] = n[2];
}
if (!model.resliceGeom) {
model.resliceGeom = vtkPolyData.newInstance();
}
model.resliceGeom.getPoints().setData(ptsArray, 3);
model.resliceGeom.getPolys().setData(cellArray, 1);
const normals = vtkDataArray.newInstance({
numberOfComponents: 3,
values: normalsData,
name: 'Normals',
});
model.resliceGeom.getPointData().setNormals(normals);
}
} else E{
vtkErrorMacro(
'Something went wrong.',
'A default slice plane should have been created in the beginning of',
'updateResliceGeometry.'
);
}
model.resliceGeomUpdateString = resGeomString;
model.resliceGeom?.modified();
}
};
publicAPI.setOpenGLTexture = (oglTex) => {
Iif (oglTex) {
model.openGLTexture = oglTex;
model._externalOpenGLTexture = true;
}
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
VBOBuildTime: {},
VBOBuildString: null,
haveSeenDepthRequest: false,
lastHaveSeenDepthRequest: false,
lastIndependentComponents: false,
lastTextureComponents: 0,
lastSlabThickness: 0,
lastSlabTrapezoidIntegration: 0,
lastSlabType: -1,
openGLTexture: null,
openGLTextureString: null,
colorTextureString: null,
pwfTextureString: null,
resliceGeom: null,
resliceGeomUpdateString: null,
tris: null,
colorTexture: null,
pwfTexture: null,
_externalOpenGLTexture: false,
_scalars: null,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Inheritance
vtkViewNode.extend(publicAPI, model, initialValues);
vtkReplacementShaderMapper.implementReplaceShaderCoincidentOffset(
publicAPI,
model,
initialValues
);
vtkReplacementShaderMapper.implementBuildShadersWithReplacements(
publicAPI,
model,
initialValues
);
model.tris = vtkHelper.newInstance();
model.openGLTexture = null;
model.colorTexture = null;
model.pwfTexture = null;
model.VBOBuildTime = {};
macro.obj(model.VBOBuildTime);
model.tmpMat4 = mat4.identity(new Float64Array(16));
// Implicit plane to polydata related cache:
model.outlineFilter = vtkImageDataOutlineFilter.newInstance();
model.outlineFilter.setGenerateFaces(true);
model.outlineFilter.setGenerateLines(false);
model.cubePolyData = vtkPolyData.newInstance();
model.cutter = vtkCutter.newInstance();
model.lineToSurfaceFilter = vtkClosedPolyLineToSurfaceFilter.newInstance();
model.transform = vtkTransform.newInstance();
macro.get(publicAPI, model, ['openGLTexture']);
// Object methods
vtkOpenGLImageResliceMapper(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(
extend,
'vtkOpenGLImageResliceMapper'
);
// ----------------------------------------------------------------------------
export default { newInstance, extend };
// Register ourself to OpenGL backend if imported
registerOverride('vtkImageResliceMapper', newInstance);
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