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import * as macro from 'vtk.js/Sources/macros';
import vtkCamera from 'vtk.js/Sources/Rendering/Core/Camera';
import vtkLight from 'vtk.js/Sources/Rendering/Core/Light';
import * as vtkMath from 'vtk.js/Sources/Common/Core/Math';
import vtkViewport from 'vtk.js/Sources/Rendering/Core/Viewport';
import vtkBoundingBox from 'vtk.js/Sources/Common/DataModel/BoundingBox';
const { vtkDebugMacro, vtkErrorMacro, vtkWarningMacro } = macro;
function notImplemented(method) {
return () => vtkErrorMacro(`vtkRenderer::${method} - NOT IMPLEMENTED`);
}
// ----------------------------------------------------------------------------
// vtkRenderer methods
// ----------------------------------------------------------------------------
function vtkRenderer(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkRenderer');
// Events
const COMPUTE_VISIBLE_PROP_BOUNDS_EVENT = {
type: 'ComputeVisiblePropBoundsEvent',
renderer: publicAPI,
};
const RESET_CAMERA_CLIPPING_RANGE_EVENT = {
type: 'ResetCameraClippingRangeEvent',
renderer: publicAPI,
};
const RESET_CAMERA_EVENT = {
type: 'ResetCameraEvent',
renderer: publicAPI,
};
publicAPI.updateCamera = () => {
if (!model.activeCamera) {
vtkDebugMacro('No cameras are on, creating one.');
// the get method will automagically create a camera
// and reset it since one hasn't been specified yet.
publicAPI.getActiveCameraAndResetIfCreated();
}
// update the viewing transformation
model.activeCamera.render(publicAPI);
return true;
};
publicAPI.updateLightsGeometryToFollowCamera = () => {
// only update the light's geometry if this Renderer is tracking
// this lights. That allows one renderer to view the lights that
// another renderer is setting up.
const camera = publicAPI.getActiveCameraAndResetIfCreated();
model.lights.forEach((light) => {
Iif (light.lightTypeIsSceneLight()) {
// Do nothing. Don't reset the transform matrix because applications
// may have set a custom matrix. Only reset the transform matrix in
// vtkLight::SetLightTypeToSceneLight()
} else if (light.lightTypeIsHeadLight()) {
// update position and orientation of light to match camera.
light.setPositionFrom(camera.getPositionByReference());
light.setFocalPointFrom(camera.getFocalPointByReference());
light.modified(camera.getMTime());
} else Eif (light.lightTypeIsCameraLight()) {
light.setTransformMatrix(
camera.getCameraLightTransformMatrix(mat4.create())
);
} else {
vtkErrorMacro('light has unknown light type', light.get());
}
});
};
publicAPI.updateLightGeometry = () => {
if (model.lightFollowCamera) {
// only update the light's geometry if this Renderer is tracking
// this lights. That allows one renderer to view the lights that
// another renderer is setting up.
return publicAPI.updateLightsGeometryToFollowCamera();
}
return true;
};
publicAPI.allocateTime = notImplemented('allocateTime');
publicAPI.updateGeometry = notImplemented('updateGeometry');
publicAPI.getVTKWindow = () => model._renderWindow;
publicAPI.setLayer = (layer) => {
vtkDebugMacro(
publicAPI.getClassName(),
publicAPI,
'setting Layer to ',
layer
);
if (model.layer !== layer) {
model.layer = layer;
publicAPI.modified();
}
publicAPI.setPreserveColorBuffer(!!layer);
};
publicAPI.setActiveCamera = (camera) => {
Iif (model.activeCamera === camera) {
return false;
}
model.activeCamera = camera;
publicAPI.modified();
publicAPI.invokeEvent({ type: 'ActiveCameraEvent', camera });
return true;
};
publicAPI.makeCamera = () => {
const camera = vtkCamera.newInstance();
publicAPI.invokeEvent({ type: 'CreateCameraEvent', camera });
return camera;
};
// Replace the set/get macro method
publicAPI.getActiveCamera = () => {
if (!model.activeCamera) {
model.activeCamera = publicAPI.makeCamera();
}
return model.activeCamera;
};
publicAPI.getActiveCameraAndResetIfCreated = () => {
Iif (!model.activeCamera) {
publicAPI.getActiveCamera();
publicAPI.resetCamera();
}
return model.activeCamera;
};
publicAPI.getActors = () => {
model.actors = [];
model.props.forEach((prop) => {
model.actors = model.actors.concat(prop.getActors());
});
return model.actors;
};
publicAPI.addActor = publicAPI.addViewProp;
publicAPI.removeActor = (actor) => {
model.actors = model.actors.filter((a) => a !== actor);
publicAPI.removeViewProp(actor);
publicAPI.modified();
};
publicAPI.removeAllActors = () => {
const actors = publicAPI.getActors();
actors.forEach((actor) => {
publicAPI.removeViewProp(actor);
});
model.actors = [];
publicAPI.modified();
};
publicAPI.getVolumes = () => {
model.volumes = [];
model.props.forEach((prop) => {
model.volumes = model.volumes.concat(prop.getVolumes());
});
return model.volumes;
};
publicAPI.addVolume = publicAPI.addViewProp;
publicAPI.removeVolume = (volume) => {
model.volumes = model.volumes.filter((v) => v !== volume);
publicAPI.removeViewProp(volume);
publicAPI.modified();
};
publicAPI.removeAllVolumes = () => {
const volumes = publicAPI.getVolumes();
volumes.forEach((volume) => {
publicAPI.removeViewProp(volume);
});
model.volumes = [];
publicAPI.modified();
};
publicAPI.hasLight = (light) => model.lights.includes(light);
publicAPI.addLight = (light) => {
if (light && !publicAPI.hasLight(light)) {
model.lights.push(light);
publicAPI.modified();
}
};
publicAPI.removeLight = (light) => {
model.lights = model.lights.filter((l) => l !== light);
publicAPI.modified();
};
publicAPI.removeAllLights = () => {
model.lights = [];
publicAPI.modified();
};
publicAPI.setLightCollection = (lights) => {
model.lights = lights;
publicAPI.modified();
};
publicAPI.makeLight = vtkLight.newInstance;
publicAPI.createLight = () => {
Iif (!model.automaticLightCreation) {
return;
}
Iif (model._createdLight) {
publicAPI.removeLight(model._createdLight);
model._createdLight.delete();
model._createdLight = null;
}
model._createdLight = publicAPI.makeLight();
publicAPI.addLight(model._createdLight);
model._createdLight.setLightTypeToHeadLight();
// set these values just to have a good default should LightFollowCamera
// be turned off.
model._createdLight.setPosition(publicAPI.getActiveCamera().getPosition());
model._createdLight.setFocalPoint(
publicAPI.getActiveCamera().getFocalPoint()
);
};
// requires the aspect ratio of the viewport as X/Y
publicAPI.normalizedDisplayToWorld = (x, y, z, aspect) => {
let vpd = publicAPI.normalizedDisplayToProjection(x, y, z);
vpd = publicAPI.projectionToView(vpd[0], vpd[1], vpd[2], aspect);
return publicAPI.viewToWorld(vpd[0], vpd[1], vpd[2]);
};
// requires the aspect ratio of the viewport as X/Y
publicAPI.worldToNormalizedDisplay = (x, y, z, aspect) => {
let vpd = publicAPI.worldToView(x, y, z);
vpd = publicAPI.viewToProjection(vpd[0], vpd[1], vpd[2], aspect);
return publicAPI.projectionToNormalizedDisplay(vpd[0], vpd[1], vpd[2]);
};
// requires the aspect ratio of the viewport as X/Y
publicAPI.viewToWorld = (x, y, z) => {
Iif (model.activeCamera === null) {
vtkErrorMacro(
'ViewToWorld: no active camera, cannot compute view to world, returning 0,0,0'
);
return [0, 0, 0];
}
// get the view matrix from the active camera
const matrix = model.activeCamera.getViewMatrix();
mat4.invert(matrix, matrix);
mat4.transpose(matrix, matrix);
// Transform point to world coordinates
const result = new Float64Array([x, y, z]);
vec3.transformMat4(result, result, matrix);
return result;
};
publicAPI.projectionToView = (x, y, z, aspect) => {
Iif (model.activeCamera === null) {
vtkErrorMacro(
'ProjectionToView: no active camera, cannot compute projection to view, returning 0,0,0'
);
return [0, 0, 0];
}
// get the projection transformation from the active camera
const matrix = model.activeCamera.getProjectionMatrix(aspect, -1.0, 1.0);
mat4.invert(matrix, matrix);
mat4.transpose(matrix, matrix);
// Transform point to world coordinates
const result = new Float64Array([x, y, z]);
vec3.transformMat4(result, result, matrix);
return result;
};
// Convert world point coordinates to view coordinates.
publicAPI.worldToView = (x, y, z) => {
Iif (model.activeCamera === null) {
vtkErrorMacro(
'WorldToView: no active camera, cannot compute view to world, returning 0,0,0'
);
return [0, 0, 0];
}
// get the view transformation from the active camera
const matrix = model.activeCamera.getViewMatrix();
mat4.transpose(matrix, matrix);
const result = new Float64Array([x, y, z]);
vec3.transformMat4(result, result, matrix);
return result;
};
// Convert world point coordinates to view coordinates.
// requires the aspect ratio of the viewport as X/Y
publicAPI.viewToProjection = (x, y, z, aspect) => {
Iif (model.activeCamera === null) {
vtkErrorMacro(
'ViewToProjection: no active camera, cannot compute view to projection, returning 0,0,0'
);
return [0, 0, 0];
}
// get the projeciton transformation from the active camera
const matrix = model.activeCamera.getProjectionMatrix(aspect, -1.0, 1.0);
mat4.transpose(matrix, matrix);
const result = new Float64Array([x, y, z]);
vec3.transformMat4(result, result, matrix);
return result;
};
publicAPI.computeVisiblePropBounds = () => {
model.allBounds[0] = vtkBoundingBox.INIT_BOUNDS[0];
model.allBounds[1] = vtkBoundingBox.INIT_BOUNDS[1];
model.allBounds[2] = vtkBoundingBox.INIT_BOUNDS[2];
model.allBounds[3] = vtkBoundingBox.INIT_BOUNDS[3];
model.allBounds[4] = vtkBoundingBox.INIT_BOUNDS[4];
model.allBounds[5] = vtkBoundingBox.INIT_BOUNDS[5];
let nothingVisible = true;
publicAPI.invokeEvent(COMPUTE_VISIBLE_PROP_BOUNDS_EVENT);
// loop through all props
for (let index = 0; index < model.props.length; ++index) {
const prop = model.props[index];
if (prop.getVisibility() && prop.getUseBounds()) {
const bounds = prop.getBounds();
if (bounds && vtkMath.areBoundsInitialized(bounds)) {
nothingVisible = false;
if (bounds[0] < model.allBounds[0]) {
model.allBounds[0] = bounds[0];
}
if (bounds[1] > model.allBounds[1]) {
model.allBounds[1] = bounds[1];
}
if (bounds[2] < model.allBounds[2]) {
model.allBounds[2] = bounds[2];
}
if (bounds[3] > model.allBounds[3]) {
model.allBounds[3] = bounds[3];
}
if (bounds[4] < model.allBounds[4]) {
model.allBounds[4] = bounds[4];
}
if (bounds[5] > model.allBounds[5]) {
model.allBounds[5] = bounds[5];
}
}
}
}
if (nothingVisible) {
vtkMath.uninitializeBounds(model.allBounds);
vtkDebugMacro("Can't compute bounds, no 3D props are visible");
}
return model.allBounds;
};
publicAPI.resetCamera = (bounds = null) => {
const boundsToUse = bounds || publicAPI.computeVisiblePropBounds();
const center = [0, 0, 0];
if (!vtkMath.areBoundsInitialized(boundsToUse)) {
vtkDebugMacro('Cannot reset camera!');
return false;
}
let vn = null;
if (publicAPI.getActiveCamera()) {
vn = model.activeCamera.getViewPlaneNormal();
} else E{
vtkErrorMacro('Trying to reset non-existent camera');
return false;
}
// Reset the perspective zoom factors, otherwise subsequent zooms will cause
// the view angle to become very small and cause bad depth sorting.
model.activeCamera.setViewAngle(30.0);
center[0] = (boundsToUse[0] + boundsToUse[1]) / 2.0;
center[1] = (boundsToUse[2] + boundsToUse[3]) / 2.0;
center[2] = (boundsToUse[4] + boundsToUse[5]) / 2.0;
let w1 = boundsToUse[1] - boundsToUse[0];
let w2 = boundsToUse[3] - boundsToUse[2];
let w3 = boundsToUse[5] - boundsToUse[4];
w1 *= w1;
w2 *= w2;
w3 *= w3;
let radius = w1 + w2 + w3;
// If we have just a single point, pick a radius of 1.0
radius = radius === 0 ? 1.0 : radius;
// compute the radius of the enclosing sphere
radius = Math.sqrt(radius) * 0.5;
// default so that the bounding sphere fits within the view fustrum
// compute the distance from the intersection of the view frustum with the
// bounding sphere. Basically in 2D draw a circle representing the bounding
// sphere in 2D then draw a horizontal line going out from the center of
// the circle. That is the camera view. Then draw a line from the camera
// position to the point where it intersects the circle. (it will be tangent
// to the circle at this point, this is important, only go to the tangent
// point, do not draw all the way to the view plane). Then draw the radius
// from the tangent point to the center of the circle. You will note that
// this forms a right triangle with one side being the radius, another being
// the target distance for the camera, then just find the target dist using
// a sin.
const angle = vtkMath.radiansFromDegrees(model.activeCamera.getViewAngle());
const parallelScale = radius;
const distance = radius / Math.sin(angle * 0.5);
// check view-up vector against view plane normal
const vup = model.activeCamera.getViewUp();
if (Math.abs(vtkMath.dot(vup, vn)) > 0.999) {
vtkWarningMacro('Resetting view-up since view plane normal is parallel');
model.activeCamera.setViewUp(-vup[2], vup[0], vup[1]);
}
// update the camera
model.activeCamera.setFocalPoint(center[0], center[1], center[2]);
model.activeCamera.setPosition(
center[0] + distance * vn[0],
center[1] + distance * vn[1],
center[2] + distance * vn[2]
);
publicAPI.resetCameraClippingRange(boundsToUse);
// setup default parallel scale
model.activeCamera.setParallelScale(parallelScale);
// update reasonable world to physical values
model.activeCamera.setPhysicalScale(radius);
model.activeCamera.setPhysicalTranslation(
-center[0],
-center[1],
-center[2]
);
// Here to let parallel/distributed compositing intercept
// and do the right thing.
publicAPI.invokeEvent(RESET_CAMERA_EVENT);
return true;
};
publicAPI.resetCameraClippingRange = (bounds = null) => {
const boundsToUse = bounds || publicAPI.computeVisiblePropBounds();
if (!vtkMath.areBoundsInitialized(boundsToUse)) {
vtkDebugMacro('Cannot reset camera clipping range!');
return false;
}
// Make sure we have an active camera
publicAPI.getActiveCameraAndResetIfCreated();
Iif (!model.activeCamera) {
vtkErrorMacro('Trying to reset clipping range of non-existent camera');
return false;
}
// Get the exact range for the bounds
const range = model.activeCamera.computeClippingRange(boundsToUse);
// do not let far - near be less than 0.1 of the window height
// this is for cases such as 2D images which may have zero range
let minGap = 0.0;
if (model.activeCamera.getParallelProjection()) {
minGap = 0.2 * model.activeCamera.getParallelScale();
} else {
const angle = vtkMath.radiansFromDegrees(
model.activeCamera.getViewAngle()
);
minGap = 0.2 * Math.tan(angle / 2.0) * range[1];
}
if (range[1] - range[0] < minGap) {
minGap = minGap - range[1] + range[0];
range[1] += minGap / 2.0;
range[0] -= minGap / 2.0;
}
// Do not let the range behind the camera throw off the calculation.
Iif (range[0] < 0.0) {
range[0] = 0.0;
}
// Give ourselves a little breathing room
range[0] =
0.99 * range[0] - (range[1] - range[0]) * model.clippingRangeExpansion;
range[1] =
1.01 * range[1] + (range[1] - range[0]) * model.clippingRangeExpansion;
// Make sure near is not bigger than far
range[0] = range[0] >= range[1] ? 0.01 * range[1] : range[0];
// Make sure near is at least some fraction of far - this prevents near
// from being behind the camera or too close in front. How close is too
// close depends on the resolution of the depth buffer
if (!model.nearClippingPlaneTolerance) {
model.nearClippingPlaneTolerance = 0.01;
}
// make sure the front clipping range is not too far from the far clippnig
// range, this is to make sure that the zbuffer resolution is effectively
// used
if (range[0] < model.nearClippingPlaneTolerance * range[1]) {
range[0] = model.nearClippingPlaneTolerance * range[1];
}
model.activeCamera.setClippingRange(range[0], range[1]);
// Here to let parallel/distributed compositing intercept
// and do the right thing.
publicAPI.invokeEvent(RESET_CAMERA_CLIPPING_RANGE_EVENT);
return false;
};
publicAPI.setRenderWindow = (renderWindow) => {
if (renderWindow !== model._renderWindow) {
model._vtkWindow = renderWindow;
model._renderWindow = renderWindow;
}
};
publicAPI.visibleActorCount = () =>
model.props.filter((prop) => prop.getVisibility()).length;
publicAPI.visibleVolumeCount = publicAPI.visibleActorCount;
publicAPI.getMTime = () => {
let m1 = model.mtime;
const m2 = model.activeCamera ? model.activeCamera.getMTime() : 0;
if (m2 > m1) {
m1 = m2;
}
const m3 = model._createdLight ? model._createdLight.getMTime() : 0;
if (m3 > m1) {
m1 = m3;
}
return m1;
};
publicAPI.getTransparent = () => !!model.preserveColorBuffer;
publicAPI.isActiveCameraCreated = () => !!model.activeCamera;
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
pickedProp: null,
activeCamera: null,
allBounds: [],
ambient: [1, 1, 1],
allocatedRenderTime: 100,
timeFactor: 1,
automaticLightCreation: true,
twoSidedLighting: true,
lastRenderTimeInSeconds: -1,
renderWindow: null,
lights: [],
actors: [],
volumes: [],
lightFollowCamera: true,
numberOfPropsRendered: 0,
propArray: null,
pathArray: null,
layer: 0,
preserveColorBuffer: false,
preserveDepthBuffer: false,
computeVisiblePropBounds: vtkMath.createUninitializedBounds(),
interactive: true,
nearClippingPlaneTolerance: 0,
clippingRangeExpansion: 0.05,
erase: true,
draw: true,
useShadows: false,
useDepthPeeling: false,
occlusionRatio: 0,
maximumNumberOfPeels: 4,
selector: null,
delegate: null,
texturedBackground: false,
backgroundTexture: null,
environmentTexture: null,
environmentTextureDiffuseStrength: 1,
environmentTextureSpecularStrength: 1,
useEnvironmentTextureAsBackground: false,
pass: 0,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Inheritance
vtkViewport.extend(publicAPI, model, initialValues);
// make sure background has 4 entries. Default to opaque black
Iif (!model.background) model.background = [0, 0, 0, 1];
while (model.background.length < 3) model.background.push(0);
if (model.background.length === 3) model.background.push(1);
// Build VTK API
macro.get(publicAPI, model, [
'_renderWindow',
'allocatedRenderTime',
'timeFactor',
'lastRenderTimeInSeconds',
'numberOfPropsRendered',
'lastRenderingUsedDepthPeeling',
'selector',
]);
macro.setGet(publicAPI, model, [
'twoSidedLighting',
'lightFollowCamera',
'automaticLightCreation',
'erase',
'draw',
'nearClippingPlaneTolerance',
'clippingRangeExpansion',
'backingStore',
'interactive',
'layer',
'preserveColorBuffer',
'preserveDepthBuffer',
'useDepthPeeling',
'occlusionRatio',
'maximumNumberOfPeels',
'delegate',
'backgroundTexture',
'texturedBackground',
'environmentTexture',
'environmentTextureDiffuseStrength',
'environmentTextureSpecularStrength',
'useEnvironmentTextureAsBackground',
'useShadows',
'pass',
]);
macro.getArray(publicAPI, model, ['actors', 'volumes', 'lights']);
macro.setGetArray(publicAPI, model, ['background'], 4, 1.0);
macro.moveToProtected(publicAPI, model, ['renderWindow']);
// Object methods
vtkRenderer(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkRenderer');
// ----------------------------------------------------------------------------
export default { newInstance, extend };
|