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14x 3x 17x 17x 17x 17x 17x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 3x 17x 14x 14x 56x 56x 56x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 14x 17x 15x 17x 17x 17x 17x 17x 17x 17x 17x 17x 17x 17x 17x 17408x 17408x 17x 17x 17x 17x 17x 17x 17x 17x 17x 17x 15x 70x 70x 70x 1x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 15x 1x 1x | import * as macro from 'vtk.js/Sources/macros';
import DeepEqual from 'fast-deep-equal';
import { vec3, mat3, mat4 } from 'gl-matrix';
// import vtkBoundingBox from 'vtk.js/Sources/Common/DataModel/BoundingBox';
import vtkDataArray from 'vtk.js/Sources/Common/Core/DataArray';
import { VtkDataTypes } from 'vtk.js/Sources/Common/Core/DataArray/Constants';
import vtkHelper from 'vtk.js/Sources/Rendering/OpenGL/Helper';
import * as vtkMath from 'vtk.js/Sources/Common/Core/Math';
import vtkOpenGLFramebuffer from 'vtk.js/Sources/Rendering/OpenGL/Framebuffer';
import vtkOpenGLTexture from 'vtk.js/Sources/Rendering/OpenGL/Texture';
import vtkReplacementShaderMapper from 'vtk.js/Sources/Rendering/OpenGL/ReplacementShaderMapper';
import vtkShaderProgram from 'vtk.js/Sources/Rendering/OpenGL/ShaderProgram';
import vtkVertexArrayObject from 'vtk.js/Sources/Rendering/OpenGL/VertexArrayObject';
import vtkViewNode from 'vtk.js/Sources/Rendering/SceneGraph/ViewNode';
import { Representation } from 'vtk.js/Sources/Rendering/Core/Property/Constants';
import {
Wrap,
Filter,
} from 'vtk.js/Sources/Rendering/OpenGL/Texture/Constants';
import {
InterpolationType,
OpacityMode,
ColorMixPreset,
} from 'vtk.js/Sources/Rendering/Core/VolumeProperty/Constants';
import { BlendMode } from 'vtk.js/Sources/Rendering/Core/VolumeMapper/Constants';
import {
getTransferFunctionHash,
getImageDataHash,
} from 'vtk.js/Sources/Rendering/OpenGL/RenderWindow/resourceSharingHelper';
import vtkVolumeVS from 'vtk.js/Sources/Rendering/OpenGL/glsl/vtkVolumeVS.glsl';
import vtkVolumeFS from 'vtk.js/Sources/Rendering/OpenGL/glsl/vtkVolumeFS.glsl';
import { registerOverride } from 'vtk.js/Sources/Rendering/OpenGL/ViewNodeFactory';
const { vtkWarningMacro, vtkErrorMacro } = macro;
// ----------------------------------------------------------------------------
// helper methods
// ----------------------------------------------------------------------------
function getColorCodeFromPreset(colorMixPreset) {
switch (colorMixPreset) {
case ColorMixPreset.CUSTOM:
return '//VTK::CustomColorMix';
case ColorMixPreset.ADDITIVE:
return `
// compute normals
mat4 normalMat = computeMat4Normal(posIS, tValue, tstep);
#if (vtkLightComplexity > 0) && defined(vtkComputeNormalFromOpacity)
vec3 scalarInterp0[2];
vec4 normalLight0 = computeNormalForDensity(posIS, tstep, scalarInterp0, 0);
scalarInterp0[0] = scalarInterp0[0] * oscale0 + oshift0;
scalarInterp0[1] = scalarInterp0[1] * oscale0 + oshift0;
normalLight0 = computeDensityNormal(scalarInterp0, height0, 1.0);
vec3 scalarInterp1[2];
vec4 normalLight1 = computeNormalForDensity(posIS, tstep, scalarInterp1, 1);
scalarInterp1[0] = scalarInterp1[0] * oscale1 + oshift1;
scalarInterp1[1] = scalarInterp1[1] * oscale1 + oshift1;
normalLight1 = computeDensityNormal(scalarInterp1, height1, 1.0);
#else
vec4 normalLight0 = normalMat[0];
vec4 normalLight1 = normalMat[1];
#endif
// compute opacities
float opacity0 = pwfValue0;
float opacity1 = pwfValue1;
#ifdef vtkGradientOpacityOn
float gof0 = computeGradientOpacityFactor(normalMat[0].a, goscale0, goshift0, gomin0, gomax0);
opacity0 *= gof0;
float gof1 = computeGradientOpacityFactor(normalMat[1].a, goscale1, goshift1, gomin1, gomax1);
opacity1 *= gof1;
#endif
float opacitySum = opacity0 + opacity1;
if (opacitySum <= 0.0) {
return vec4(0.0);
}
// mix the colors and opacities
tColor0 = applyAllLightning(tColor0, opacity0, posIS, normalLight0);
tColor1 = applyAllLightning(tColor1, opacity1, posIS, normalLight1);
vec3 mixedColor = (opacity0 * tColor0 + opacity1 * tColor1) / opacitySum;
return vec4(mixedColor, min(1.0, opacitySum));
`;
case ColorMixPreset.COLORIZE:
return `
// compute normals
mat4 normalMat = computeMat4Normal(posIS, tValue, tstep);
#if (vtkLightComplexity > 0) && defined(vtkComputeNormalFromOpacity)
vec3 scalarInterp0[2];
vec4 normalLight0 = computeNormalForDensity(posIS, tstep, scalarInterp0, 0);
scalarInterp0[0] = scalarInterp0[0] * oscale0 + oshift0;
scalarInterp0[1] = scalarInterp0[1] * oscale0 + oshift0;
normalLight0 = computeDensityNormal(scalarInterp0, height0, 1.0);
#else
vec4 normalLight0 = normalMat[0];
#endif
// compute opacities
float opacity0 = pwfValue0;
#ifdef vtkGradientOpacityOn
float gof0 = computeGradientOpacityFactor(normalMat[0].a, goscale0, goshift0, gomin0, gomax0);
opacity0 *= gof0;
#endif
// mix the colors and opacities
vec3 color = tColor0 * mix(vec3(1.0), tColor1, pwfValue1);
color = applyAllLightning(color, opacity0, posIS, normalLight0);
return vec4(color, opacity0);
`;
default:
return null;
}
}
// ----------------------------------------------------------------------------
// vtkOpenGLVolumeMapper methods
// ----------------------------------------------------------------------------
function vtkOpenGLVolumeMapper(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkOpenGLVolumeMapper');
function unregisterGraphicsResources(renderWindow) {
[
model._scalars,
model._scalarOpacityFunc,
model._colorTransferFunc,
model._labelOutlineThicknessArray,
].forEach((coreObject) =>
renderWindow.unregisterGraphicsResourceUser(coreObject, publicAPI)
);
}
publicAPI.buildPass = () => {
model.zBufferTexture = null;
};
// ohh someone is doing a zbuffer pass, use that for
// intermixed volume rendering
publicAPI.zBufferPass = (prepass, renderPass) => {
if (prepass) {
const zbt = renderPass.getZBufferTexture();
if (zbt !== model.zBufferTexture) {
model.zBufferTexture = zbt;
}
}
};
publicAPI.opaqueZBufferPass = (prepass, renderPass) =>
publicAPI.zBufferPass(prepass, renderPass);
// Renders myself
publicAPI.volumePass = (prepass, renderPass) => {
if (prepass) {
const oldOglRenderWindow = model._openGLRenderWindow;
model._openGLRenderWindow = publicAPI.getLastAncestorOfType(
'vtkOpenGLRenderWindow'
);
Iif (
oldOglRenderWindow &&
!oldOglRenderWindow.isDeleted() &&
oldOglRenderWindow !== model._openGLRenderWindow
) {
// Unregister the mapper when the render window changes
unregisterGraphicsResources(oldOglRenderWindow);
}
model.context = model._openGLRenderWindow.getContext();
model.tris.setOpenGLRenderWindow(model._openGLRenderWindow);
model.jitterTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
model.framebuffer.setOpenGLRenderWindow(model._openGLRenderWindow);
model.openGLVolume = publicAPI.getFirstAncestorOfType('vtkOpenGLVolume');
const actor = model.openGLVolume.getRenderable();
model._openGLRenderer =
publicAPI.getFirstAncestorOfType('vtkOpenGLRenderer');
const ren = model._openGLRenderer.getRenderable();
model.openGLCamera = model._openGLRenderer.getViewNodeFor(
ren.getActiveCamera()
);
publicAPI.renderPiece(ren, actor);
}
};
publicAPI.getShaderTemplate = (shaders, ren, actor) => {
shaders.Vertex = vtkVolumeVS;
shaders.Fragment = vtkVolumeFS;
shaders.Geometry = '';
};
publicAPI.useIndependentComponents = (actorProperty) => {
const iComps = actorProperty.getIndependentComponents();
const image = model.currentInput;
const numComp = image
?.getPointData()
?.getScalars()
?.getNumberOfComponents();
const colorMixPreset = actorProperty.getColorMixPreset();
return (iComps && numComp >= 2) || !!colorMixPreset;
};
publicAPI.replaceShaderValues = (shaders, ren, actor) => {
const actorProps = actor.getProperty();
let FSSource = shaders.Fragment;
// define some values in the shader
const iType = actorProps.getInterpolationType();
if (iType === InterpolationType.LINEAR) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::TrilinearOn',
'#define vtkTrilinearOn'
).result;
}
const vtkImageLabelOutline = publicAPI.isLabelmapOutlineRequired(actor);
Iif (vtkImageLabelOutline === true) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::ImageLabelOutlineOn',
'#define vtkImageLabelOutlineOn'
).result;
}
const LabelEdgeProjection =
model.renderable.getBlendMode() ===
BlendMode.LABELMAP_EDGE_PROJECTION_BLEND;
Iif (LabelEdgeProjection) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::LabelEdgeProjectionOn',
'#define vtkLabelEdgeProjectionOn'
).result;
}
const numComp = model.scalarTexture.getComponents();
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::NumComponents',
`#define vtkNumComponents ${numComp}`
).result;
const useIndependentComps = publicAPI.useIndependentComponents(actorProps);
if (useIndependentComps) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::IndependentComponentsOn',
'#define UseIndependentComponents'
).result;
}
// Define any proportional components
const proportionalComponents = [];
const forceNearestComponents = [];
for (let nc = 0; nc < numComp; nc++) {
if (actorProps.getOpacityMode(nc) === OpacityMode.PROPORTIONAL) {
proportionalComponents.push(`#define vtkComponent${nc}Proportional`);
}
Iif (actorProps.getForceNearestInterpolation(nc)) {
forceNearestComponents.push(`#define vtkComponent${nc}ForceNearest`);
}
}
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::vtkProportionalComponents',
proportionalComponents.join('\n')
).result;
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::vtkForceNearestComponents',
forceNearestComponents.join('\n')
).result;
const colorMixPreset = actorProps.getColorMixPreset();
const colorMixCode = getColorCodeFromPreset(colorMixPreset);
if (colorMixCode) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::CustomComponentsColorMixOn',
'#define vtkCustomComponentsColorMix'
).result;
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::CustomComponentsColorMix::Impl',
colorMixCode
).result;
}
// WebGL only supports loops over constants
// and does not support while loops so we
// have to hard code how many steps/samples to take
// We do a break so most systems will gracefully
// early terminate, but it is always possible
// a system will execute every step regardless
const ext = model.currentInput.getSpatialExtent();
const spc = model.currentInput.getSpacing();
const vsize = new Float64Array(3);
vec3.set(
vsize,
(ext[1] - ext[0]) * spc[0],
(ext[3] - ext[2]) * spc[1],
(ext[5] - ext[4]) * spc[2]
);
const maxSamples =
vec3.length(vsize) / publicAPI.getCurrentSampleDistance(ren);
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::MaximumSamplesValue',
`${Math.ceil(maxSamples)}`
).result;
// set light complexity
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::LightComplexity',
`#define vtkLightComplexity ${model.lightComplexity}`
).result;
// set shadow blending flag
if (model.lightComplexity > 0) {
if (model.renderable.getVolumetricScatteringBlending() > 0.0) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::VolumeShadowOn',
`#define VolumeShadowOn`
).result;
}
if (model.renderable.getVolumetricScatteringBlending() < 1.0) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::SurfaceShadowOn',
`#define SurfaceShadowOn`
).result;
}
Iif (
model.renderable.getLocalAmbientOcclusion() &&
actorProps.getAmbient() > 0.0
) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::localAmbientOcclusionOn',
`#define localAmbientOcclusionOn`
).result;
}
}
// if using gradient opacity define that
const numIComps = useIndependentComps ? numComp : 1;
model.gopacity = false;
for (let nc = 0; !model.gopacity && nc < numIComps; ++nc) {
model.gopacity ||= actorProps.getUseGradientOpacity(nc);
}
if (model.gopacity) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::GradientOpacityOn',
'#define vtkGradientOpacityOn'
).result;
}
// set normal from density
if (model.renderable.getComputeNormalFromOpacity()) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::vtkComputeNormalFromOpacity',
`#define vtkComputeNormalFromOpacity`
).result;
}
// if we have a ztexture then declare it and use it
if (model.zBufferTexture !== null) {
FSSource = vtkShaderProgram.substitute(FSSource, '//VTK::ZBuffer::Dec', [
'uniform sampler2D zBufferTexture;',
'uniform float vpZWidth;',
'uniform float vpZHeight;',
]).result;
FSSource = vtkShaderProgram.substitute(FSSource, '//VTK::ZBuffer::Impl', [
'vec4 depthVec = texture2D(zBufferTexture, vec2(gl_FragCoord.x / vpZWidth, gl_FragCoord.y/vpZHeight));',
'float zdepth = (depthVec.r*256.0 + depthVec.g)/257.0;',
'zdepth = zdepth * 2.0 - 1.0;',
'if (cameraParallel == 0) {',
'zdepth = -2.0 * camFar * camNear / (zdepth*(camFar-camNear)-(camFar+camNear)) - camNear;}',
'else {',
'zdepth = (zdepth + 1.0) * 0.5 * (camFar - camNear);}\n',
'zdepth = -zdepth/rayDir.z;',
'dists.y = min(zdepth,dists.y);',
]).result;
}
// Set the BlendMode approach
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::BlendMode',
`${model.renderable.getBlendMode()}`
).result;
shaders.Fragment = FSSource;
publicAPI.replaceShaderLight(shaders, ren, actor);
publicAPI.replaceShaderClippingPlane(shaders, ren, actor);
};
publicAPI.replaceShaderLight = (shaders, ren, actor) => {
if (model.lightComplexity === 0) {
return;
}
let FSSource = shaders.Fragment;
// check for shadow maps - not implemented yet, skip
// const shadowFactor = '';
// to-do: single out the case when complexity = 1
// only account for lights that are switched on
let lightNum = 0;
ren.getLights().forEach((light) => {
if (light.getSwitch()) {
lightNum += 1;
}
});
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::Light::Dec',
[
`uniform int lightNum;`,
`uniform bool twoSidedLighting;`,
`uniform vec3 lightColor[${lightNum}];`,
`uniform vec3 lightDirectionVC[${lightNum}]; // normalized`,
`uniform vec3 lightHalfAngleVC[${lightNum}];`,
'//VTK::Light::Dec',
],
false
).result;
// support any number of lights
if (model.lightComplexity === 3) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::Light::Dec',
[
`uniform vec3 lightPositionVC[${lightNum}];`,
`uniform vec3 lightAttenuation[${lightNum}];`,
`uniform float lightConeAngle[${lightNum}];`,
`uniform float lightExponent[${lightNum}];`,
`uniform int lightPositional[${lightNum}];`,
],
false
).result;
}
if (model.renderable.getVolumetricScatteringBlending() > 0.0) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::VolumeShadow::Dec',
[
`uniform float volumetricScatteringBlending;`,
`uniform float giReach;`,
`uniform float volumeShadowSamplingDistFactor;`,
`uniform float anisotropy;`,
`uniform float anisotropy2;`,
],
false
).result;
}
Iif (
model.renderable.getLocalAmbientOcclusion() &&
actor.getProperty().getAmbient() > 0.0
) {
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::LAO::Dec',
[
`uniform int kernelRadius;`,
`uniform vec2 kernelSample[${model.renderable.getLAOKernelRadius()}];`,
`uniform int kernelSize;`,
],
false
).result;
}
shaders.Fragment = FSSource;
};
publicAPI.replaceShaderClippingPlane = (shaders, ren, actor) => {
let FSSource = shaders.Fragment;
if (model.renderable.getClippingPlanes().length > 0) {
const clipPlaneSize = model.renderable.getClippingPlanes().length;
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::ClipPlane::Dec',
[
`uniform vec3 vClipPlaneNormals[6];`,
`uniform float vClipPlaneDistances[6];`,
`uniform vec3 vClipPlaneOrigins[6];`,
`uniform int clip_numPlanes;`,
'//VTK::ClipPlane::Dec',
'#define vtkClippingPlanesOn',
],
false
).result;
FSSource = vtkShaderProgram.substitute(
FSSource,
'//VTK::ClipPlane::Impl',
[
`for(int i = 0; i < ${clipPlaneSize}; i++) {`,
' float rayDirRatio = dot(rayDir, vClipPlaneNormals[i]);',
' float equationResult = dot(vertexVCVSOutput, vClipPlaneNormals[i]) + vClipPlaneDistances[i];',
' if (rayDirRatio == 0.0)',
' {',
' if (equationResult < 0.0) dists.x = dists.y;',
' continue;',
' }',
' float result = -1.0 * equationResult / rayDirRatio;',
' if (rayDirRatio < 0.0) dists.y = min(dists.y, result);',
' else dists.x = max(dists.x, result);',
'}',
'//VTK::ClipPlane::Impl',
],
false
).result;
}
shaders.Fragment = FSSource;
};
const recomputeLightComplexity = (actor, lights) => {
// do we need lighting?
let lightComplexity = 0;
if (
actor.getProperty().getShade() &&
model.renderable.getBlendMode() === BlendMode.COMPOSITE_BLEND
) {
// consider the lighting complexity to determine which case applies
// simple headlight, Light Kit, the whole feature set of VTK
lightComplexity = 0;
model.numberOfLights = 0;
lights.forEach((light) => {
const status = light.getSwitch();
if (status > 0) {
model.numberOfLights++;
if (lightComplexity === 0) {
lightComplexity = 1;
}
}
if (
lightComplexity === 1 &&
(model.numberOfLights > 1 ||
light.getIntensity() !== 1.0 ||
!light.lightTypeIsHeadLight())
) {
lightComplexity = 2;
}
if (lightComplexity < 3 && light.getPositional()) {
lightComplexity = 3;
}
});
}
if (lightComplexity !== model.lightComplexity) {
model.lightComplexity = lightComplexity;
publicAPI.modified();
}
};
publicAPI.getNeedToRebuildShaders = (cellBO, ren, actor) => {
const actorProps = actor.getProperty();
recomputeLightComplexity(actor, ren.getLights());
const numComp = model.scalarTexture.getComponents();
const opacityModes = [];
const forceNearestInterps = [];
for (let nc = 0; nc < numComp; nc++) {
opacityModes.push(actorProps.getOpacityMode(nc));
forceNearestInterps.push(actorProps.getForceNearestInterpolation(nc));
}
const ext = model.currentInput.getSpatialExtent();
const spc = model.currentInput.getSpacing();
const vsize = new Float64Array(3);
vec3.set(
vsize,
(ext[1] - ext[0]) * spc[0],
(ext[3] - ext[2]) * spc[1],
(ext[5] - ext[4]) * spc[2]
);
const maxSamples =
vec3.length(vsize) / publicAPI.getCurrentSampleDistance(ren);
const hasZBufferTexture = !!model.zBufferTexture;
const state = {
iComps: actorProps.getIndependentComponents(),
colorMixPreset: actorProps.getColorMixPreset(),
interpolationType: actorProps.getInterpolationType(),
useLabelOutline: publicAPI.isLabelmapOutlineRequired(actor),
numComp,
maxSamples,
useGradientOpacity: actorProps.getUseGradientOpacity(0),
blendMode: model.renderable.getBlendMode(),
hasZBufferTexture,
opacityModes,
forceNearestInterps,
};
// We need to rebuild the shader if one of these variables has changed,
// since they are used in the shader template replacement step.
// We also need to rebuild if the shader source time is outdated.
if (
cellBO.getProgram()?.getHandle() === 0 ||
cellBO.getShaderSourceTime().getMTime() < publicAPI.getMTime() ||
cellBO.getShaderSourceTime().getMTime() < model.renderable.getMTime() ||
!model.previousState ||
!DeepEqual(model.previousState, state)
) {
model.previousState = state;
return true;
}
return false;
};
publicAPI.updateShaders = (cellBO, ren, actor) => {
// 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.getClippingPlaneShaderParameters(cellBO, ren, actor);
};
publicAPI.setMapperShaderParameters = (cellBO, ren, actor) => {
// Now to update the VAO too, if necessary.
const program = cellBO.getProgram();
if (
cellBO.getCABO().getElementCount() &&
(model.VBOBuildTime.getMTime() >
cellBO.getAttributeUpdateTime().getMTime() ||
cellBO.getShaderSourceTime().getMTime() >
cellBO.getAttributeUpdateTime().getMTime())
) {
if (program.isAttributeUsed('vertexDC')) {
Iif (
!cellBO
.getVAO()
.addAttributeArray(
program,
cellBO.getCABO(),
'vertexDC',
cellBO.getCABO().getVertexOffset(),
cellBO.getCABO().getStride(),
model.context.FLOAT,
3,
model.context.FALSE
)
) {
vtkErrorMacro('Error setting vertexDC in shader VAO.');
}
}
cellBO.getAttributeUpdateTime().modified();
}
program.setUniformi('texture1', model.scalarTexture.getTextureUnit());
program.setUniformf(
'sampleDistance',
publicAPI.getCurrentSampleDistance(ren)
);
const volInfo = model.scalarTexture.getVolumeInfo();
const ipScalarRange = model.renderable.getIpScalarRange();
// In some situations, we might not have computed the scale and offset
// for the data range, or it might not be needed.
if (volInfo?.dataComputedScale?.length) {
const minVals = [];
const maxVals = [];
for (let i = 0; i < 4; i++) {
// convert iprange from 0-1 into data range values
minVals[i] =
ipScalarRange[0] * volInfo.dataComputedScale[i] +
volInfo.dataComputedOffset[i];
maxVals[i] =
ipScalarRange[1] * volInfo.dataComputedScale[i] +
volInfo.dataComputedOffset[i];
// convert data ranges into texture values
minVals[i] = (minVals[i] - volInfo.offset[i]) / volInfo.scale[i];
maxVals[i] = (maxVals[i] - volInfo.offset[i]) / volInfo.scale[i];
}
program.setUniform4f(
'ipScalarRangeMin',
minVals[0],
minVals[1],
minVals[2],
minVals[3]
);
program.setUniform4f(
'ipScalarRangeMax',
maxVals[0],
maxVals[1],
maxVals[2],
maxVals[3]
);
}
// if we have a zbuffer texture then set it
if (model.zBufferTexture !== null) {
program.setUniformi(
'zBufferTexture',
model.zBufferTexture.getTextureUnit()
);
const size = model._useSmallViewport
? [model._smallViewportWidth, model._smallViewportHeight]
: model._openGLRenderWindow.getFramebufferSize();
program.setUniformf('vpZWidth', size[0]);
program.setUniformf('vpZHeight', size[1]);
}
};
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.openGLVolume.getKeyMatrices();
mat4.multiply(model.modelToView, keyMats.wcvc, actMats.mcwc);
const program = cellBO.getProgram();
const cam = model.openGLCamera.getRenderable();
const crange = cam.getClippingRange();
program.setUniformf('camThick', crange[1] - crange[0]);
program.setUniformf('camNear', crange[0]);
program.setUniformf('camFar', crange[1]);
const bounds = model.currentInput.getBounds();
const dims = model.currentInput.getDimensions();
// compute the viewport bounds of the volume
// we will only render those fragments.
const pos = new Float64Array(3);
const dir = new Float64Array(3);
let dcxmin = 1.0;
let dcxmax = -1.0;
let dcymin = 1.0;
let dcymax = -1.0;
for (let i = 0; i < 8; ++i) {
vec3.set(
pos,
bounds[i % 2],
bounds[2 + (Math.floor(i / 2) % 2)],
bounds[4 + Math.floor(i / 4)]
);
vec3.transformMat4(pos, pos, model.modelToView);
if (!cam.getParallelProjection()) {
vec3.normalize(dir, pos);
// now find the projection of this point onto a
// nearZ distance plane. Since the camera is at 0,0,0
// in VC the ray is just t*pos and
// t is -nearZ/dir.z
// intersection becomes pos.x/pos.z
const t = -crange[0] / pos[2];
vec3.scale(pos, dir, t);
}
// now convert to DC
vec3.transformMat4(pos, pos, keyMats.vcpc);
dcxmin = Math.min(pos[0], dcxmin);
dcxmax = Math.max(pos[0], dcxmax);
dcymin = Math.min(pos[1], dcymin);
dcymax = Math.max(pos[1], dcymax);
}
program.setUniformf('dcxmin', dcxmin);
program.setUniformf('dcxmax', dcxmax);
program.setUniformf('dcymin', dcymin);
program.setUniformf('dcymax', dcymax);
if (program.isUniformUsed('cameraParallel')) {
program.setUniformi('cameraParallel', cam.getParallelProjection());
}
const ext = model.currentInput.getSpatialExtent();
const spc = model.currentInput.getSpacing();
const vsize = new Float64Array(3);
vec3.set(
vsize,
(ext[1] - ext[0]) * spc[0],
(ext[3] - ext[2]) * spc[1],
(ext[5] - ext[4]) * spc[2]
);
program.setUniform3f('vSpacing', spc[0], spc[1], spc[2]);
vec3.set(pos, ext[0], ext[2], ext[4]);
model.currentInput.indexToWorldVec3(pos, pos);
vec3.transformMat4(pos, pos, model.modelToView);
program.setUniform3f('vOriginVC', pos[0], pos[1], pos[2]);
// apply the image directions
const i2wmat4 = model.currentInput.getIndexToWorld();
mat4.multiply(model.idxToView, model.modelToView, i2wmat4);
mat3.multiply(
model.idxNormalMatrix,
keyMats.normalMatrix,
actMats.normalMatrix
);
mat3.multiply(
model.idxNormalMatrix,
model.idxNormalMatrix,
model.currentInput.getDirectionByReference()
);
const maxSamples =
vec3.length(vsize) / publicAPI.getCurrentSampleDistance(ren);
Iif (maxSamples > model.renderable.getMaximumSamplesPerRay()) {
vtkWarningMacro(`The number of steps required ${Math.ceil(
maxSamples
)} is larger than the
specified maximum number of steps ${model.renderable.getMaximumSamplesPerRay()}.
Please either change the
volumeMapper sampleDistance or its maximum number of samples.`);
}
const vctoijk = new Float64Array(3);
vec3.set(vctoijk, 1.0, 1.0, 1.0);
vec3.divide(vctoijk, vctoijk, vsize);
program.setUniform3f('vVCToIJK', vctoijk[0], vctoijk[1], vctoijk[2]);
program.setUniform3i('volumeDimensions', dims[0], dims[1], dims[2]);
program.setUniform3f('volumeSpacings', spc[0], spc[1], spc[2]);
Iif (!model._openGLRenderWindow.getWebgl2()) {
const volInfo = model.scalarTexture.getVolumeInfo();
program.setUniformf('texWidth', model.scalarTexture.getWidth());
program.setUniformf('texHeight', model.scalarTexture.getHeight());
program.setUniformi('xreps', volInfo.xreps);
program.setUniformi('xstride', volInfo.xstride);
program.setUniformi('ystride', volInfo.ystride);
}
// map normals through normal matrix
// then use a point on the plane to compute the distance
const normal = new Float64Array(3);
const pos2 = new Float64Array(3);
for (let i = 0; i < 6; ++i) {
switch (i) {
case 1:
vec3.set(normal, -1.0, 0.0, 0.0);
vec3.set(pos2, ext[0], ext[2], ext[4]);
break;
case 2:
vec3.set(normal, 0.0, 1.0, 0.0);
vec3.set(pos2, ext[1], ext[3], ext[5]);
break;
case 3:
vec3.set(normal, 0.0, -1.0, 0.0);
vec3.set(pos2, ext[0], ext[2], ext[4]);
break;
case 4:
vec3.set(normal, 0.0, 0.0, 1.0);
vec3.set(pos2, ext[1], ext[3], ext[5]);
break;
case 5:
vec3.set(normal, 0.0, 0.0, -1.0);
vec3.set(pos2, ext[0], ext[2], ext[4]);
break;
case 0:
default:
vec3.set(normal, 1.0, 0.0, 0.0);
vec3.set(pos2, ext[1], ext[3], ext[5]);
break;
}
vec3.transformMat3(normal, normal, model.idxNormalMatrix);
vec3.transformMat4(pos2, pos2, model.idxToView);
const dist = -1.0 * vec3.dot(pos2, normal);
// we have the plane in view coordinates
// specify the planes in view coordinates
program.setUniform3f(`vPlaneNormal${i}`, normal[0], normal[1], normal[2]);
program.setUniformf(`vPlaneDistance${i}`, dist);
}
Iif (publicAPI.isLabelmapOutlineRequired(actor)) {
const image = model.currentInput;
const worldToIndex = image.getWorldToIndex();
program.setUniformMatrix('vWCtoIDX', worldToIndex);
const camera = ren.getActiveCamera();
const [cRange0, cRange1] = camera.getClippingRange();
const distance = camera.getDistance();
// set the clipping range to be model.distance and model.distance + 0.1
// since we use the in the keyMats.wcpc (world to projection) matrix
// the projection matrix calculation relies on the clipping range to be
// set correctly. This is done inside the interactorStyleMPRSlice which
// limits use cases where the interactor style is not used.
camera.setClippingRange(distance, distance + 0.1);
const labelOutlineKeyMats = model.openGLCamera.getKeyMatrices(ren);
// Get the projection coordinate to world coordinate transformation matrix.
mat4.invert(model.projectionToWorld, labelOutlineKeyMats.wcpc);
// reset the clipping range since the keyMats are cached
camera.setClippingRange(cRange0, cRange1);
// to re compute the matrices for the current camera and cache them
model.openGLCamera.getKeyMatrices(ren);
program.setUniformMatrix('PCWCMatrix', model.projectionToWorld);
const size = publicAPI.getRenderTargetSize();
program.setUniformf('vpWidth', size[0]);
program.setUniformf('vpHeight', size[1]);
const offset = publicAPI.getRenderTargetOffset();
program.setUniformf('vpOffsetX', offset[0] / size[0]);
program.setUniformf('vpOffsetY', offset[1] / size[1]);
}
mat4.invert(model.projectionToView, keyMats.vcpc);
program.setUniformMatrix('PCVCMatrix', model.projectionToView);
// handle lighting values
if (model.lightComplexity === 0) {
return;
}
let lightNum = 0;
const lightColor = [];
const lightDir = [];
const halfAngle = [];
ren.getLights().forEach((light) => {
const status = light.getSwitch();
if (status > 0) {
const dColor = light.getColor();
const intensity = light.getIntensity();
lightColor[0 + lightNum * 3] = dColor[0] * intensity;
lightColor[1 + lightNum * 3] = dColor[1] * intensity;
lightColor[2 + lightNum * 3] = dColor[2] * intensity;
const ldir = light.getDirection();
vec3.set(normal, ldir[0], ldir[1], ldir[2]);
vec3.transformMat3(normal, normal, keyMats.normalMatrix); // in view coordinat
vec3.normalize(normal, normal);
lightDir[0 + lightNum * 3] = normal[0];
lightDir[1 + lightNum * 3] = normal[1];
lightDir[2 + lightNum * 3] = normal[2];
// camera DOP is 0,0,-1.0 in VC
halfAngle[0 + lightNum * 3] = -0.5 * normal[0];
halfAngle[1 + lightNum * 3] = -0.5 * normal[1];
halfAngle[2 + lightNum * 3] = -0.5 * (normal[2] - 1.0);
lightNum++;
}
});
program.setUniformi('twoSidedLighting', ren.getTwoSidedLighting());
program.setUniformi('lightNum', lightNum);
program.setUniform3fv('lightColor', lightColor);
program.setUniform3fv('lightDirectionVC', lightDir);
program.setUniform3fv('lightHalfAngleVC', halfAngle);
if (model.lightComplexity === 3) {
lightNum = 0;
const lightPositionVC = [];
const lightAttenuation = [];
const lightConeAngle = [];
const lightExponent = [];
const lightPositional = [];
ren.getLights().forEach((light) => {
const status = light.getSwitch();
if (status > 0) {
const attenuation = light.getAttenuationValues();
lightAttenuation[0 + lightNum * 3] = attenuation[0];
lightAttenuation[1 + lightNum * 3] = attenuation[1];
lightAttenuation[2 + lightNum * 3] = attenuation[2];
lightExponent[lightNum] = light.getExponent();
lightConeAngle[lightNum] = light.getConeAngle();
lightPositional[lightNum] = light.getPositional();
const lp = light.getTransformedPosition();
vec3.transformMat4(lp, lp, model.modelToView);
lightPositionVC[0 + lightNum * 3] = lp[0];
lightPositionVC[1 + lightNum * 3] = lp[1];
lightPositionVC[2 + lightNum * 3] = lp[2];
lightNum += 1;
}
});
program.setUniform3fv('lightPositionVC', lightPositionVC);
program.setUniform3fv('lightAttenuation', lightAttenuation);
program.setUniformfv('lightConeAngle', lightConeAngle);
program.setUniformfv('lightExponent', lightExponent);
program.setUniformiv('lightPositional', lightPositional);
}
if (model.renderable.getVolumetricScatteringBlending() > 0.0) {
program.setUniformf(
'giReach',
model.renderable.getGlobalIlluminationReach()
);
program.setUniformf(
'volumetricScatteringBlending',
model.renderable.getVolumetricScatteringBlending()
);
program.setUniformf(
'volumeShadowSamplingDistFactor',
model.renderable.getVolumeShadowSamplingDistFactor()
);
program.setUniformf('anisotropy', model.renderable.getAnisotropy());
program.setUniformf(
'anisotropy2',
model.renderable.getAnisotropy() ** 2.0
);
}
Iif (
model.renderable.getLocalAmbientOcclusion() &&
actor.getProperty().getAmbient() > 0.0
) {
const ks = model.renderable.getLAOKernelSize();
program.setUniformi('kernelSize', ks);
const kernelSample = [];
for (let i = 0; i < ks; i++) {
kernelSample[i * 2] = Math.random() * 0.5;
kernelSample[i * 2 + 1] = Math.random() * 0.5;
}
program.setUniform2fv('kernelSample', kernelSample);
program.setUniformi(
'kernelRadius',
model.renderable.getLAOKernelRadius()
);
}
};
publicAPI.setPropertyShaderParameters = (cellBO, ren, actor) => {
const program = cellBO.getProgram();
program.setUniformi('ctexture', model.colorTexture.getTextureUnit());
program.setUniformi('otexture', model.opacityTexture.getTextureUnit());
program.setUniformi('jtexture', model.jitterTexture.getTextureUnit());
program.setUniformi(
'ttexture',
model.labelOutlineThicknessTexture.getTextureUnit()
);
const volInfo = model.scalarTexture.getVolumeInfo();
const vprop = actor.getProperty();
// set the component mix when independent
const numComp = model.scalarTexture.getComponents();
const useIndependentComps = publicAPI.useIndependentComponents(vprop);
if (useIndependentComps) {
for (let i = 0; i < numComp; i++) {
program.setUniformf(
`mix${i}`,
actor.getProperty().getComponentWeight(i)
);
}
}
// three levels of shift scale combined into one
// for performance in the fragment shader
for (let i = 0; i < numComp; i++) {
const target = useIndependentComps ? i : 0;
const sscale = volInfo.scale[i];
const ofun = vprop.getScalarOpacity(target);
const oRange = ofun.getRange();
const oscale = sscale / (oRange[1] - oRange[0]);
const oshift = (volInfo.offset[i] - oRange[0]) / (oRange[1] - oRange[0]);
program.setUniformf(`oshift${i}`, oshift);
program.setUniformf(`oscale${i}`, oscale);
const cfun = vprop.getRGBTransferFunction(target);
const cRange = cfun.getRange();
const cshift = (volInfo.offset[i] - cRange[0]) / (cRange[1] - cRange[0]);
const cScale = sscale / (cRange[1] - cRange[0]);
program.setUniformf(`cshift${i}`, cshift);
program.setUniformf(`cscale${i}`, cScale);
}
if (model.gopacity) {
if (useIndependentComps) {
for (let nc = 0; nc < numComp; ++nc) {
const sscale = volInfo.scale[nc];
const useGO = vprop.getUseGradientOpacity(nc);
if (useGO) {
const gomin = vprop.getGradientOpacityMinimumOpacity(nc);
const gomax = vprop.getGradientOpacityMaximumOpacity(nc);
program.setUniformf(`gomin${nc}`, gomin);
program.setUniformf(`gomax${nc}`, gomax);
const goRange = [
vprop.getGradientOpacityMinimumValue(nc),
vprop.getGradientOpacityMaximumValue(nc),
];
program.setUniformf(
`goscale${nc}`,
(sscale * (gomax - gomin)) / (goRange[1] - goRange[0])
);
program.setUniformf(
`goshift${nc}`,
(-goRange[0] * (gomax - gomin)) / (goRange[1] - goRange[0]) +
gomin
);
} else {
program.setUniformf(`gomin${nc}`, 1.0);
program.setUniformf(`gomax${nc}`, 1.0);
program.setUniformf(`goscale${nc}`, 0.0);
program.setUniformf(`goshift${nc}`, 1.0);
}
}
} else {
const sscale = volInfo.scale[numComp - 1];
const gomin = vprop.getGradientOpacityMinimumOpacity(0);
const gomax = vprop.getGradientOpacityMaximumOpacity(0);
program.setUniformf('gomin0', gomin);
program.setUniformf('gomax0', gomax);
const goRange = [
vprop.getGradientOpacityMinimumValue(0),
vprop.getGradientOpacityMaximumValue(0),
];
program.setUniformf(
'goscale0',
(sscale * (gomax - gomin)) / (goRange[1] - goRange[0])
);
program.setUniformf(
'goshift0',
(-goRange[0] * (gomax - gomin)) / (goRange[1] - goRange[0]) + gomin
);
}
}
const vtkImageLabelOutline = publicAPI.isLabelmapOutlineRequired(actor);
Iif (vtkImageLabelOutline === true) {
const labelOutlineOpacity = actor.getProperty().getLabelOutlineOpacity();
program.setUniformf('outlineOpacity', labelOutlineOpacity);
}
if (model.lightComplexity > 0) {
program.setUniformf('vAmbient', vprop.getAmbient());
program.setUniformf('vDiffuse', vprop.getDiffuse());
program.setUniformf('vSpecular', vprop.getSpecular());
program.setUniformf('vSpecularPower', vprop.getSpecularPower());
}
};
publicAPI.getClippingPlaneShaderParameters = (cellBO, ren, actor) => {
if (model.renderable.getClippingPlanes().length > 0) {
const keyMats = model.openGLCamera.getKeyMatrices(ren);
const clipPlaneNormals = [];
const clipPlaneDistances = [];
const clipPlaneOrigins = [];
const clipPlanes = model.renderable.getClippingPlanes();
const clipPlaneSize = clipPlanes.length;
for (let i = 0; i < clipPlaneSize; ++i) {
const clipPlaneNormal = clipPlanes[i].getNormal();
const clipPlanePos = clipPlanes[i].getOrigin();
vec3.transformMat3(
clipPlaneNormal,
clipPlaneNormal,
keyMats.normalMatrix
);
vec3.transformMat4(clipPlanePos, clipPlanePos, keyMats.wcvc);
const clipPlaneDist = -1.0 * vec3.dot(clipPlanePos, clipPlaneNormal);
clipPlaneNormals.push(clipPlaneNormal[0]);
clipPlaneNormals.push(clipPlaneNormal[1]);
clipPlaneNormals.push(clipPlaneNormal[2]);
clipPlaneDistances.push(clipPlaneDist);
clipPlaneOrigins.push(clipPlanePos[0]);
clipPlaneOrigins.push(clipPlanePos[1]);
clipPlaneOrigins.push(clipPlanePos[2]);
}
const program = cellBO.getProgram();
program.setUniform3fv(`vClipPlaneNormals`, clipPlaneNormals);
program.setUniformfv(`vClipPlaneDistances`, clipPlaneDistances);
program.setUniform3fv(`vClipPlaneOrigins`, clipPlaneOrigins);
program.setUniformi(`clip_numPlanes`, clipPlaneSize);
}
};
// unsubscribe from our listeners
publicAPI.delete = macro.chain(
() => {
if (model._animationRateSubscription) {
model._animationRateSubscription.unsubscribe();
model._animationRateSubscription = null;
}
},
() => {
if (model._openGLRenderWindow) {
unregisterGraphicsResources(model._openGLRenderWindow);
}
},
publicAPI.delete
);
publicAPI.getRenderTargetSize = () => {
if (model._useSmallViewport) {
return [model._smallViewportWidth, model._smallViewportHeight];
}
const { usize, vsize } = model._openGLRenderer.getTiledSizeAndOrigin();
return [usize, vsize];
};
publicAPI.getRenderTargetOffset = () => {
const { lowerLeftU, lowerLeftV } =
model._openGLRenderer.getTiledSizeAndOrigin();
return [lowerLeftU, lowerLeftV];
};
publicAPI.getCurrentSampleDistance = (ren) => {
const rwi = ren.getVTKWindow().getInteractor();
const baseSampleDistance = model.renderable.getSampleDistance();
Iif (rwi.isAnimating()) {
const factor = model.renderable.getInteractionSampleDistanceFactor();
return baseSampleDistance * factor;
}
return baseSampleDistance;
};
publicAPI.renderPieceStart = (ren, actor) => {
const rwi = ren.getVTKWindow().getInteractor();
if (!model._lastScale) {
model._lastScale = model.renderable.getInitialInteractionScale();
}
model._useSmallViewport = false;
Iif (rwi.isAnimating() && model._lastScale > 1.5) {
model._useSmallViewport = true;
}
if (!model._animationRateSubscription) {
// when the animation frame rate changes recompute the scale factor
model._animationRateSubscription = rwi.onAnimationFrameRateUpdate(() => {
if (model.renderable.getAutoAdjustSampleDistances()) {
const frate = rwi.getRecentAnimationFrameRate();
const adjustment = rwi.getDesiredUpdateRate() / frate;
// only change if we are off by 15%
if (adjustment > 1.15 || adjustment < 0.85) {
model._lastScale *= adjustment;
}
// clamp scale to some reasonable values.
// Below 1.5 we will just be using full resolution as that is close enough
// Above 400 seems like a lot so we limit to that 1/20th per axis
if (model._lastScale > 400) {
model._lastScale = 400;
}
if (model._lastScale < 1.5) {
model._lastScale = 1.5;
}
} else {
model._lastScale =
model.renderable.getImageSampleDistance() *
model.renderable.getImageSampleDistance();
}
});
}
// use/create/resize framebuffer if needed
Iif (model._useSmallViewport) {
const size = model._openGLRenderWindow.getFramebufferSize();
const scaleFactor = 1 / Math.sqrt(model._lastScale);
model._smallViewportWidth = Math.ceil(scaleFactor * size[0]);
model._smallViewportHeight = Math.ceil(scaleFactor * size[1]);
// adjust viewportSize to always be at most the dest fo size
if (model._smallViewportHeight > size[1]) {
model._smallViewportHeight = size[1];
}
if (model._smallViewportWidth > size[0]) {
model._smallViewportWidth = size[0];
}
model.framebuffer.saveCurrentBindingsAndBuffers();
if (model.framebuffer.getGLFramebuffer() === null) {
model.framebuffer.create(size[0], size[1]);
model.framebuffer.populateFramebuffer();
} else {
const fbSize = model.framebuffer.getSize();
if (!fbSize || fbSize[0] !== size[0] || fbSize[1] !== size[1]) {
model.framebuffer.create(size[0], size[1]);
model.framebuffer.populateFramebuffer();
}
}
model.framebuffer.bind();
const gl = model.context;
gl.clearColor(0.0, 0.0, 0.0, 0.0);
gl.colorMask(true, true, true, true);
gl.clear(gl.COLOR_BUFFER_BIT);
gl.viewport(0, 0, model._smallViewportWidth, model._smallViewportHeight);
model.fvp = [
model._smallViewportWidth / size[0],
model._smallViewportHeight / size[1],
];
}
model.context.disable(model.context.DEPTH_TEST);
// make sure the BOs are up to date
publicAPI.updateBufferObjects(ren, actor);
// set interpolation on the texture based on property setting
const iType = actor.getProperty().getInterpolationType();
if (iType === InterpolationType.NEAREST) {
model.scalarTexture.setMinificationFilter(Filter.NEAREST);
model.scalarTexture.setMagnificationFilter(Filter.NEAREST);
} else {
model.scalarTexture.setMinificationFilter(Filter.LINEAR);
model.scalarTexture.setMagnificationFilter(Filter.LINEAR);
}
// if we have a zbuffer texture then activate it
if (model.zBufferTexture !== null) {
model.zBufferTexture.activate();
}
};
publicAPI.renderPieceDraw = (ren, actor) => {
const gl = model.context;
// render the texture
model.scalarTexture.activate();
model.opacityTexture.activate();
model.labelOutlineThicknessTexture.activate();
model.colorTexture.activate();
model.jitterTexture.activate();
publicAPI.updateShaders(model.tris, ren, actor);
// First we do the triangles, update the shader, set uniforms, etc.
// for (let i = 0; i < 11; ++i) {
// gl.drawArrays(gl.TRIANGLES, 66 * i, 66);
// }
gl.drawArrays(gl.TRIANGLES, 0, model.tris.getCABO().getElementCount());
model.tris.getVAO().release();
model.scalarTexture.deactivate();
model.colorTexture.deactivate();
model.opacityTexture.deactivate();
model.labelOutlineThicknessTexture.deactivate();
model.jitterTexture.deactivate();
};
publicAPI.renderPieceFinish = (ren, actor) => {
// if we have a zbuffer texture then deactivate it
if (model.zBufferTexture !== null) {
model.zBufferTexture.deactivate();
}
Iif (model._useSmallViewport) {
// now copy the framebuffer with the volume into the
// regular buffer
model.framebuffer.restorePreviousBindingsAndBuffers();
if (model.copyShader === null) {
model.copyShader = model._openGLRenderWindow
.getShaderCache()
.readyShaderProgramArray(
[
'//VTK::System::Dec',
'attribute vec4 vertexDC;',
'uniform vec2 tfactor;',
'varying vec2 tcoord;',
'void main() { tcoord = vec2(vertexDC.x*0.5 + 0.5, vertexDC.y*0.5 + 0.5) * tfactor; gl_Position = vertexDC; }',
].join('\n'),
[
'//VTK::System::Dec',
'//VTK::Output::Dec',
'uniform sampler2D texture1;',
'varying vec2 tcoord;',
'void main() { gl_FragData[0] = texture2D(texture1,tcoord); }',
].join('\n'),
''
);
const program = model.copyShader;
model.copyVAO = vtkVertexArrayObject.newInstance();
model.copyVAO.setOpenGLRenderWindow(model._openGLRenderWindow);
model.tris.getCABO().bind();
if (
!model.copyVAO.addAttributeArray(
program,
model.tris.getCABO(),
'vertexDC',
model.tris.getCABO().getVertexOffset(),
model.tris.getCABO().getStride(),
model.context.FLOAT,
3,
model.context.FALSE
)
) {
vtkErrorMacro('Error setting vertexDC in copy shader VAO.');
}
} else {
model._openGLRenderWindow
.getShaderCache()
.readyShaderProgram(model.copyShader);
}
const size = model._openGLRenderWindow.getFramebufferSize();
model.context.viewport(0, 0, size[0], size[1]);
// activate texture
const tex = model.framebuffer.getColorTexture();
tex.activate();
model.copyShader.setUniformi('texture', tex.getTextureUnit());
model.copyShader.setUniform2f('tfactor', model.fvp[0], model.fvp[1]);
const gl = model.context;
gl.blendFuncSeparate(
gl.ONE,
gl.ONE_MINUS_SRC_ALPHA,
gl.ONE,
gl.ONE_MINUS_SRC_ALPHA
);
// render quad
model.context.drawArrays(
model.context.TRIANGLES,
0,
model.tris.getCABO().getElementCount()
);
tex.deactivate();
gl.blendFuncSeparate(
gl.SRC_ALPHA,
gl.ONE_MINUS_SRC_ALPHA,
gl.ONE,
gl.ONE_MINUS_SRC_ALPHA
);
}
};
publicAPI.renderPiece = (ren, actor) => {
publicAPI.invokeEvent({ type: 'StartEvent' });
model.renderable.update();
model.currentInput = model.renderable.getInputData();
publicAPI.invokeEvent({ type: 'EndEvent' });
Iif (!model.currentInput) {
vtkErrorMacro('No input!');
return;
}
publicAPI.renderPieceStart(ren, actor);
publicAPI.renderPieceDraw(ren, actor);
publicAPI.renderPieceFinish(ren, actor);
};
publicAPI.computeBounds = (ren, actor) => {
if (!publicAPI.getInput()) {
vtkMath.uninitializeBounds(model.Bounds);
return;
}
model.bounds = publicAPI.getInput().getBounds();
};
publicAPI.updateBufferObjects = (ren, actor) => {
// Rebuild buffers if needed
if (publicAPI.getNeedToRebuildBufferObjects(ren, actor)) {
publicAPI.buildBufferObjects(ren, actor);
}
};
publicAPI.getNeedToRebuildBufferObjects = (ren, actor) => {
// first do a coarse check
if (
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.scalarTexture?.getHandle() ||
!model.colorTexture?.getHandle() ||
!model.labelOutlineThicknessTexture?.getHandle()
) {
return true;
}
return false;
};
publicAPI.buildBufferObjects = (ren, actor) => {
const image = model.currentInput;
Iif (!image) {
return;
}
const scalars = image.getPointData() && image.getPointData().getScalars();
Iif (!scalars) {
return;
}
const vprop = actor.getProperty();
if (!model.jitterTexture.getHandle()) {
const oTable = new Uint8Array(32 * 32);
for (let i = 0; i < 32 * 32; ++i) {
oTable[i] = 255.0 * Math.random();
}
model.jitterTexture.setMinificationFilter(Filter.LINEAR);
model.jitterTexture.setMagnificationFilter(Filter.LINEAR);
model.jitterTexture.create2DFromRaw(
32,
32,
1,
VtkDataTypes.UNSIGNED_CHAR,
oTable
);
}
const numComp = scalars.getNumberOfComponents();
const useIndependentComps = publicAPI.useIndependentComponents(vprop);
const numIComps = useIndependentComps ? numComp : 1;
const scalarOpacityFunc = vprop.getScalarOpacity();
const opTex =
model._openGLRenderWindow.getGraphicsResourceForObject(scalarOpacityFunc);
let toString = getTransferFunctionHash(
scalarOpacityFunc,
useIndependentComps,
numIComps
);
const reBuildOp = !opTex?.oglObject || opTex.hash !== toString;
if (reBuildOp) {
model.opacityTexture = vtkOpenGLTexture.newInstance();
model.opacityTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
// rebuild opacity tfun?
const oWidth = 1024;
const oSize = oWidth * 2 * numIComps;
const ofTable = new Float32Array(oSize);
const tmpTable = new Float32Array(oWidth);
for (let c = 0; c < numIComps; ++c) {
const ofun = vprop.getScalarOpacity(c);
const opacityFactor =
publicAPI.getCurrentSampleDistance(ren) /
vprop.getScalarOpacityUnitDistance(c);
const oRange = ofun.getRange();
ofun.getTable(oRange[0], oRange[1], oWidth, tmpTable, 1);
// adjust for sample distance etc
for (let i = 0; i < oWidth; ++i) {
ofTable[c * oWidth * 2 + i] =
1.0 - (1.0 - tmpTable[i]) ** opacityFactor;
ofTable[c * oWidth * 2 + i + oWidth] = ofTable[c * oWidth * 2 + i];
}
}
model.opacityTexture.resetFormatAndType();
model.opacityTexture.setMinificationFilter(Filter.LINEAR);
model.opacityTexture.setMagnificationFilter(Filter.LINEAR);
// use float texture where possible because we really need the resolution
// for this table. Errors in low values of opacity accumulate to
// visible artifacts. High values of opacity quickly terminate without
// artifacts.
if (
model._openGLRenderWindow.getWebgl2() ||
(model.context.getExtension('OES_texture_float') &&
model.context.getExtension('OES_texture_float_linear'))
) {
model.opacityTexture.create2DFromRaw(
oWidth,
2 * numIComps,
1,
VtkDataTypes.FLOAT,
ofTable
);
} else E{
const oTable = new Uint8ClampedArray(oSize);
for (let i = 0; i < oSize; ++i) {
oTable[i] = 255.0 * ofTable[i];
}
model.opacityTexture.create2DFromRaw(
oWidth,
2 * numIComps,
1,
VtkDataTypes.UNSIGNED_CHAR,
oTable
);
}
if (scalarOpacityFunc) {
model._openGLRenderWindow.setGraphicsResourceForObject(
scalarOpacityFunc,
model.opacityTexture,
toString
);
if (scalarOpacityFunc !== model._scalarOpacityFunc) {
model._openGLRenderWindow.registerGraphicsResourceUser(
scalarOpacityFunc,
publicAPI
);
model._openGLRenderWindow.unregisterGraphicsResourceUser(
model._scalarOpacityFunc,
publicAPI
);
}
model._scalarOpacityFunc = scalarOpacityFunc;
}
} else {
model.opacityTexture = opTex.oglObject;
}
// rebuild color tfun?
const colorTransferFunc = vprop.getRGBTransferFunction();
toString = getTransferFunctionHash(
colorTransferFunc,
useIndependentComps,
numIComps
);
const cTex =
model._openGLRenderWindow.getGraphicsResourceForObject(colorTransferFunc);
const reBuildC = !cTex?.oglObject?.getHandle() || cTex?.hash !== toString;
if (reBuildC) {
model.colorTexture = vtkOpenGLTexture.newInstance();
model.colorTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
const cWidth = 1024;
const cSize = cWidth * 2 * numIComps * 3;
const cTable = new Uint8ClampedArray(cSize);
const tmpTable = new Float32Array(cWidth * 3);
for (let c = 0; c < numIComps; ++c) {
const cfun = vprop.getRGBTransferFunction(c);
const cRange = cfun.getRange();
cfun.getTable(cRange[0], cRange[1], cWidth, tmpTable, 1);
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];
}
}
model.colorTexture.resetFormatAndType();
model.colorTexture.setMinificationFilter(Filter.LINEAR);
model.colorTexture.setMagnificationFilter(Filter.LINEAR);
model.colorTexture.create2DFromRaw(
cWidth,
2 * numIComps,
3,
VtkDataTypes.UNSIGNED_CHAR,
cTable
);
if (colorTransferFunc) {
model._openGLRenderWindow.setGraphicsResourceForObject(
colorTransferFunc,
model.colorTexture,
toString
);
if (colorTransferFunc !== model._colorTransferFunc) {
model._openGLRenderWindow.registerGraphicsResourceUser(
colorTransferFunc,
publicAPI
);
model._openGLRenderWindow.unregisterGraphicsResourceUser(
model._colorTransferFunc,
publicAPI
);
}
model._colorTransferFunc = colorTransferFunc;
}
} else {
model.colorTexture = cTex.oglObject;
}
publicAPI.updateLabelOutlineThicknessTexture(actor);
const tex = model._openGLRenderWindow.getGraphicsResourceForObject(scalars);
// rebuild the scalarTexture if the data has changed
toString = getImageDataHash(image, scalars);
const reBuildTex = !tex?.oglObject?.getHandle() || tex?.hash !== toString;
if (reBuildTex) {
model.scalarTexture = vtkOpenGLTexture.newInstance();
model.scalarTexture.setOpenGLRenderWindow(model._openGLRenderWindow);
// Build the textures
const dims = image.getDimensions();
// Use norm16 for scalar texture if the extension is available
model.scalarTexture.setOglNorm16Ext(
model.context.getExtension('EXT_texture_norm16')
);
model.scalarTexture.resetFormatAndType();
model.scalarTexture.create3DFilterableFromDataArray(
dims[0],
dims[1],
dims[2],
scalars,
model.renderable.getPreferSizeOverAccuracy()
);
if (scalars) {
model._openGLRenderWindow.setGraphicsResourceForObject(
scalars,
model.scalarTexture,
toString
);
if (scalars !== model._scalars) {
model._openGLRenderWindow.registerGraphicsResourceUser(
scalars,
publicAPI
);
model._openGLRenderWindow.unregisterGraphicsResourceUser(
model._scalars,
publicAPI
);
}
model._scalars = scalars;
}
} else {
model.scalarTexture = tex.oglObject;
}
if (!model.tris.getCABO().getElementCount()) {
// build the CABO
const ptsArray = new Float32Array(12);
for (let i = 0; i < 4; i++) {
ptsArray[i * 3] = (i % 2) * 2 - 1.0;
ptsArray[i * 3 + 1] = i > 1 ? 1.0 : -1.0;
ptsArray[i * 3 + 2] = -1.0;
}
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 dim = 12.0;
// const ptsArray = new Float32Array(3 * dim * dim);
// for (let i = 0; i < dim; i++) {
// for (let j = 0; j < dim; j++) {
// const offset = ((i * dim) + j) * 3;
// ptsArray[offset] = (2.0 * (i / (dim - 1.0))) - 1.0;
// ptsArray[offset + 1] = (2.0 * (j / (dim - 1.0))) - 1.0;
// ptsArray[offset + 2] = -1.0;
// }
// }
// const cellArray = new Uint16Array(8 * (dim - 1) * (dim - 1));
// for (let i = 0; i < dim - 1; i++) {
// for (let j = 0; j < dim - 1; j++) {
// const offset = 8 * ((i * (dim - 1)) + j);
// cellArray[offset] = 3;
// cellArray[offset + 1] = (i * dim) + j;
// cellArray[offset + 2] = (i * dim) + 1 + j;
// cellArray[offset + 3] = ((i + 1) * dim) + 1 + j;
// cellArray[offset + 4] = 3;
// cellArray[offset + 5] = (i * dim) + j;
// cellArray[offset + 6] = ((i + 1) * dim) + 1 + j;
// cellArray[offset + 7] = ((i + 1) * dim) + j;
// }
// }
const points = vtkDataArray.newInstance({
numberOfComponents: 3,
values: ptsArray,
});
points.setName('points');
const cells = vtkDataArray.newInstance({
numberOfComponents: 1,
values: cellArray,
});
model.tris.getCABO().createVBO(cells, 'polys', Representation.SURFACE, {
points,
cellOffset: 0,
});
}
model.VBOBuildTime.modified();
};
publicAPI.updateLabelOutlineThicknessTexture = (volume) => {
const labelOutlineThicknessArray = volume
.getProperty()
.getLabelOutlineThickness();
const lTex = model._openGLRenderWindow.getGraphicsResourceForObject(
labelOutlineThicknessArray
);
// compute the join of the labelOutlineThicknessArray so that
// we can use it to decide whether to rebuild the labelOutlineThicknessTexture
// or not
const toString = `${labelOutlineThicknessArray.join('-')}`;
const reBuildL = !lTex?.oglObject?.getHandle() || lTex?.hash !== toString;
if (reBuildL) {
model.labelOutlineThicknessTexture = vtkOpenGLTexture.newInstance();
model.labelOutlineThicknessTexture.setOpenGLRenderWindow(
model._openGLRenderWindow
);
const lWidth = 1024;
const lHeight = 1;
const lSize = lWidth * lHeight;
const lTable = new Uint8Array(lSize);
// Assuming labelOutlineThicknessArray contains the thickness for each segment
for (let i = 0; i < lWidth; ++i) {
// Retrieve the thickness value for the current segment index.
// If the value is undefined, use the first element's value as a default, otherwise use the value (even if 0)
const thickness =
typeof labelOutlineThicknessArray[i] !== 'undefined'
? labelOutlineThicknessArray[i]
: labelOutlineThicknessArray[0];
lTable[i] = thickness;
}
model.labelOutlineThicknessTexture.resetFormatAndType();
model.labelOutlineThicknessTexture.setMinificationFilter(Filter.NEAREST);
model.labelOutlineThicknessTexture.setMagnificationFilter(Filter.NEAREST);
// Create a 2D texture (acting as 1D) from the raw data
model.labelOutlineThicknessTexture.create2DFromRaw(
lWidth,
lHeight,
1,
VtkDataTypes.UNSIGNED_CHAR,
lTable
);
if (labelOutlineThicknessArray) {
model._openGLRenderWindow.setGraphicsResourceForObject(
labelOutlineThicknessArray,
model.labelOutlineThicknessTexture,
toString
);
if (labelOutlineThicknessArray !== model._labelOutlineThicknessArray) {
model._openGLRenderWindow.registerGraphicsResourceUser(
labelOutlineThicknessArray,
publicAPI
);
model._openGLRenderWindow.unregisterGraphicsResourceUser(
model._labelOutlineThicknessArray,
publicAPI
);
}
model._labelOutlineThicknessArray = labelOutlineThicknessArray;
}
} else E{
model.labelOutlineThicknessTexture = lTex.oglObject;
}
};
publicAPI.isLabelmapOutlineRequired = (actor) => {
const prop = actor.getProperty();
const renderable = model.renderable;
return (
prop.getUseLabelOutline() ||
renderable.getBlendMode() === BlendMode.LABELMAP_EDGE_PROJECTION_BLEND
);
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
context: null,
VBOBuildTime: null,
scalarTexture: null,
opacityTexture: null,
opacityTextureString: null,
colorTexture: null,
colorTextureString: null,
jitterTexture: null,
labelOutlineThicknessTexture: null,
labelOutlineThicknessTextureString: null,
tris: null,
framebuffer: null,
copyShader: null,
copyVAO: null,
lastXYF: 1.0,
targetXYF: 1.0,
zBufferTexture: null,
lastZBufferTexture: null,
lightComplexity: 0,
fullViewportTime: 1.0,
idxToView: null,
idxNormalMatrix: null,
modelToView: null,
projectionToView: null,
avgWindowArea: 0.0,
avgFrameTime: 0.0,
// _scalars: null,
// _scalarOpacityFunc: null,
// _colorTransferFunc: null,
// _labelOutlineThicknessArray: null,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Inheritance
vtkViewNode.extend(publicAPI, model, initialValues);
vtkReplacementShaderMapper.implementBuildShadersWithReplacements(
publicAPI,
model,
initialValues
);
model.VBOBuildTime = {};
macro.obj(model.VBOBuildTime, { mtime: 0 });
model.tris = vtkHelper.newInstance();
model.jitterTexture = vtkOpenGLTexture.newInstance();
model.jitterTexture.setWrapS(Wrap.REPEAT);
model.jitterTexture.setWrapT(Wrap.REPEAT);
model.framebuffer = vtkOpenGLFramebuffer.newInstance();
model.idxToView = mat4.identity(new Float64Array(16));
model.idxNormalMatrix = mat3.identity(new Float64Array(9));
model.modelToView = mat4.identity(new Float64Array(16));
model.projectionToView = mat4.identity(new Float64Array(16));
model.projectionToWorld = mat4.identity(new Float64Array(16));
// Build VTK API
macro.setGet(publicAPI, model, ['context']);
// Object methods
vtkOpenGLVolumeMapper(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkOpenGLVolumeMapper');
// ----------------------------------------------------------------------------
export default { newInstance, extend };
// Register ourself to OpenGL backend if imported
registerOverride('vtkVolumeMapper', newInstance);
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