@xeokit/xeokit-sdk
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3D BIM IFC Viewer SDK for AEC engineering applications. Open Source JavaScript Toolkit based on pure WebGL for top performance, real-world coordinates and full double precision
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JavaScript
import {math} from "../../viewer/scene/math/math.js";
import {buildCylinderGeometry} from "../../viewer/scene/geometry/builders/buildCylinderGeometry.js";
import {buildTorusGeometry} from "../../viewer/scene/geometry/builders/buildTorusGeometry.js";
import {ReadableGeometry} from "../../viewer/scene/geometry/ReadableGeometry.js";
import {PhongMaterial} from "../../viewer/scene/materials/PhongMaterial.js";
import {EmphasisMaterial} from "../../viewer/scene/materials/EmphasisMaterial.js";
import {Node} from "../../viewer/scene/nodes/Node.js";
import {Mesh} from "../../viewer/scene/mesh/Mesh.js";
import {buildSphereGeometry} from "../../viewer/scene/geometry/builders/buildSphereGeometry.js";
import {worldToRTCPos} from "../../viewer/scene/math/rtcCoords.js";
import {transformToNode} from "../lib/ui/index.js";
const zeroVec = new Float64Array([0, 0, 1]);
const quat = new Float64Array(4);
/**
* Controls a transformation with mouse and touch input.
*
* @private
*/
class TransformControl {
/** @private */
constructor(viewer) {
const cameraControl = viewer.cameraControl;
const scene = viewer.scene;
const canvas = scene.canvas.canvas;
// Builds the Entities that represent this Control.
const NO_STATE_INHERIT = false;
const arrowLength = 1.0;
const handleRadius = 0.09;
const tubeRadius = 0.01;
const rootNode = new Node(scene, { // Root of Node graph that represents this control in the 3D scene
position: [0, 0, 0],
scale: [5, 5, 5],
isObject: false
});
const pos = math.vec3();
this._setPosition = (function() {
const origin = math.vec3();
const rtcPos = math.vec3();
return function(p) {
pos.set(p);
worldToRTCPos(p, origin, rtcPos);
rootNode.origin = origin;
rootNode.position = rtcPos;
};
})();
this._setQuaternion = q => { rootNode.quaternion = q; };
const arrowGeometry = (radiusBottom, height) => new ReadableGeometry(rootNode, buildCylinderGeometry({
radiusTop: 0.001,
radiusBottom: radiusBottom,
radialSegments: 32,
heightSegments: 1,
height: height,
openEnded: false
}));
const tubeGeometry = (radius, height, radialSegments) => new ReadableGeometry(rootNode, buildCylinderGeometry({
radiusTop: radius,
radiusBottom: radius,
radialSegments: radialSegments,
heightSegments: 1,
height: height,
openEnded: false
}));
const torusGeometry = (tube, arcFraction, tubeSegments) => new ReadableGeometry(rootNode, buildTorusGeometry({
radius: arrowLength - 0.2,
tube: tube,
radialSegments: 64,
tubeSegments: tubeSegments,
arc: (Math.PI * 2.0) * arcFraction
}));
const shapes = {// Reusable geometries
curve: torusGeometry(tubeRadius, 0.25, 14),
curveHandle: torusGeometry(handleRadius, 0.25, 14),
hoop: torusGeometry(tubeRadius, 1, 8),
arrowHead: arrowGeometry(0.07, 0.2),
arrowHeadBig: arrowGeometry(0.09, 0.25),
arrowHeadHandle: tubeGeometry(handleRadius, 0.37, 8),
axis: tubeGeometry(tubeRadius, arrowLength, 20),
axisHandle: tubeGeometry(handleRadius, arrowLength, 20)
};
const colorMaterial = (rgb) => new PhongMaterial(rootNode, {
diffuse: rgb,
emissive: rgb,
ambient: [0.0, 0.0, 0.0],
specular: [.6, .6, .3],
shininess: 80,
lineWidth: 2
});
const highlightMaterial = (rgb, fillAlpha) => new EmphasisMaterial(rootNode, {
edges: false,
fill: true,
fillColor: rgb,
fillAlpha: fillAlpha
});
const pickableMaterial = new PhongMaterial(rootNode, { // Invisible material for pickable handles, which define a pickable 3D area
diffuse: [1, 1, 0],
alpha: 0, // Invisible
alphaMode: "blend"
});
const handlers = { };
const addAxis = (rgb, hoopRot) => {
const axisDirection = math.mulVec3Scalar(rgb, -1, math.vec3());
const material = colorMaterial(rgb);
const hoopMatrix = math.quaternionToRotationMat4(hoopRot, math.identityMat4());
math.mulMat4(math.rotationMat4v(Math.PI, [0,1,0], math.mat4()), hoopMatrix, hoopMatrix);
const scale = math.scaleMat4v([0.6, 0.6, 0.6], math.identityMat4());
const scaledArrowMatrix = (t, matR) => {
const matT = math.translateMat4v(t, math.identityMat4());
const ret = math.identityMat4();
math.mulMat4(matT, matR, ret);
math.mulMat4(hoopMatrix, ret, ret);
return math.mulMat4(ret, scale, math.identityMat4());
};
const curve = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.curve,
material: material,
matrix: hoopMatrix,
pickable: false,
collidable: true,
clippable: false,
backfaces: true,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const rotateHandle = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.curveHandle,
material: pickableMaterial,
matrix: hoopMatrix,
pickable: true,
collidable: true,
clippable: false,
backfaces: true,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const arrow1 = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.arrowHead,
material: material,
matrix: scaledArrowMatrix([ .8, .07, 0 ], math.rotationMat4v(180 * math.DEGTORAD, [0, 0, 1], math.identityMat4())),
pickable: true,
collidable: true,
clippable: false,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const arrow2 = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.arrowHead,
material: material,
matrix: scaledArrowMatrix([ .07, .8, 0 ], math.rotationMat4v(90 * math.DEGTORAD, [0, 0, 1], math.identityMat4())),
pickable: true,
collidable: true,
clippable: false,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const hoop = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.hoop,
material: material,
highlighted: true,
highlightMaterial: highlightMaterial(rgb, 0.6),
matrix: hoopMatrix,
pickable: false,
collidable: true,
clippable: false,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const axisRotation = math.quaternionToRotationMat4(math.vec3PairToQuaternion([ 0, 1, 0 ], rgb), math.identityMat4());
math.mulMat4(math.rotationMat4v(Math.PI, [0,1,0], math.mat4()), axisRotation, axisRotation);
const translatedAxisMatrix = (yOffset) => math.mulMat4(axisRotation, math.translateMat4c(0, yOffset, 0, math.identityMat4()), math.identityMat4());
const arrowMatrix = translatedAxisMatrix(arrowLength + .1);
const shaftMatrix = translatedAxisMatrix(arrowLength / 2);
const arrow = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.arrowHead,
material: material,
matrix: arrowMatrix,
pickable: false,
collidable: true,
clippable: false,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const arrowHandle = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.arrowHeadHandle,
material: pickableMaterial,
matrix: arrowMatrix,
pickable: true,
collidable: true,
clippable: false,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const shaft = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.axis,
material: material,
matrix: shaftMatrix,
pickable: false,
collidable: true,
clippable: false,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const shaftHandle = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.axisHandle,
material: pickableMaterial,
matrix: shaftMatrix,
pickable: true,
collidable: true,
clippable: false,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const bigArrowHead = rootNode.addChild(new Mesh(rootNode, {
geometry: shapes.arrowHeadBig,
material: material,
matrix: arrowMatrix,
pickable: false,
collidable: true,
clippable: false,
visible: false,
isUI: true,
isObject: false
}), NO_STATE_INHERIT);
const localToWorldVec = (localVec, worldVec) => math.vec3ApplyQuaternion(rootNode.quaternion, localVec, worldVec);
const closestPointOnAxis = (function() {
const worldAxis = math.vec3();
const org = math.vec3();
const dir = math.vec3();
return (canvasPos, dst) => {
localToWorldVec(rgb, worldAxis);
const P = pos;
const D = worldAxis;
math.canvasPosToWorldRay(canvas, scene.camera.viewMatrix, scene.camera.projMatrix, scene.camera.projection, canvasPos, org, dir);
const d01 = math.dotVec3(D, dir);
const v = math.subVec3(org, P, dst);
const v0 = math.dotVec3(v, D);
const v1 = math.dotVec3(v, dir);
const det = 1 - d01 * d01;
if (Math.abs(det) > 1e-10) { // if lines are not parallel
const s = (v0 - d01 * v1) / det;
math.addVec3(P, math.mulVec3Scalar(D, s, dst), dst);
return true;
} else {
return false;
}
};
})();
const initOffset = math.vec3();
const tempVec3 = math.vec3();
handlers[arrowHandle.id] = handlers[shaftHandle.id] = {
setActivated: a => bigArrowHead.visible = a,
initDragAction: (initCanvasPos) => {
return closestPointOnAxis(initCanvasPos, initOffset) && math.subVec3(initOffset, pos, initOffset) && ((canvasPos) => {
if (closestPointOnAxis(canvasPos, tempVec3)) {
math.subVec3(tempVec3, initOffset, tempVec3);
this._setPosition(tempVec3);
if (this._handlers) {
this._handlers.onPosition(tempVec3);
}
}
});
}
};
handlers[rotateHandle.id] = {
setActivated: a => hoop.visible = a,
initDragAction: (initCanvasPos) => {
const rotationFromCanvasPos = (function() {
const planeCanvasPos = scene.camera.projectWorldPos(pos);
localToWorldVec(rgb, tempVec3);
math.transformVec3(scene.camera.normalMatrix, tempVec3, tempVec3);
const axisCoeff = Math.sign(tempVec3[2]);
return (canvasPos) => {
const dx = canvasPos[0] - planeCanvasPos[0];
const dy = canvasPos[1] - planeCanvasPos[1];
return axisCoeff * Math.atan2(-dy, dx);
};
})();
let lastRotation = rotationFromCanvasPos(initCanvasPos);
return canvasPos => {
const rotation = rotationFromCanvasPos(canvasPos);
rootNode.rotate(rgb, (rotation - lastRotation) * 180 / Math.PI);
if (this._handlers) {
this._handlers.onQuaternion(rootNode.quaternion);
}
lastRotation = rotation;
};
}
};
let positionActive = false;
let rotationActive = false;
let visible = false;
const updatePositionHandle = () => {
const v = visible && positionActive;
arrowHandle.visible = shaftHandle.visible = arrow.visible = shaft.visible = !!v;
if (! v) {
bigArrowHead.visible = false;
}
};
const updateRotationHandle = () => {
const v = visible && rotationActive;
rotateHandle.visible = curve.visible = arrow1.visible = arrow2.visible = !!v;
if (! v) {
hoop.visible = false;
}
};
return {
setPositionActive: (a) => { positionActive = a; updatePositionHandle(); },
setRotationActive: (a) => { rotationActive = a; updateRotationHandle(); },
set visible(v) {
visible = v;
updatePositionHandle();
updateRotationHandle();
}
};
};
this._displayMeshes = {
center: rootNode.addChild(new Mesh(rootNode, { // center
geometry: new ReadableGeometry(rootNode, buildSphereGeometry({
radius: 0.05
})),
material: new PhongMaterial(rootNode, {
diffuse: [0.0, 0.0, 0.0],
emissive: [0, 0, 0],
ambient: [0.0, 0.0, 0.0],
specular: [.6, .6, .3],
shininess: 80
}),
pickable: false,
collidable: true,
clippable: false,
visible: false,
isObject: false
}), NO_STATE_INHERIT),
x: addAxis([1,0,0], math.vec3PairToQuaternion([1,0,0], [0,0,1])),
y: addAxis([0,1,0], math.eulerToQuaternion([90,0,0], "XYZ")),
z: addAxis([0,0,1], math.identityQuaternion())
};
const cleanups = [ ];
{ // Keep gizmo screen size constant
let lastDist = -1;
const setRootNodeScale = size => {
if (rootNode.scale[0] !== size) {
rootNode.scale = [size, size, size];
if (this._handlers && this._handlers.onScreenScale) {
this._handlers.onScreenScale(rootNode.scale);
}
}
};
const onSceneTick = scene.on("tick", () => {
const camera = scene.camera;
const dist = Math.abs(math.distVec3(camera.eye, pos));
if (camera.projection === "perspective") {
if (dist !== lastDist) {
setRootNodeScale(0.07 * dist * Math.tan(camera.perspective.fov * math.DEGTORAD));
}
} else if (camera.projection === "ortho") {
setRootNodeScale(camera.ortho.scale / 10);
}
lastDist = dist;
});
cleanups.push(() => scene.off(onSceneTick));
}
{
let deactivateActive = null;
let currentDrag = null;
cleanups.push(() => { if (currentDrag) { currentDrag.cleanup(); } });
const canvasPos = math.vec2();
const copyCanvasPos = (event, vec2) => {
vec2[0] = event.pageX;
vec2[1] = event.pageY;
transformToNode(canvas.ownerDocument.documentElement, canvas, vec2);
};
const pickIds = Object.keys(handlers);
const pickHandler = (e) => {
copyCanvasPos(e, canvasPos);
// This doesn't guarantee the gizmo is prioritized (as it should be) by other Scene::pick calls
const pickResult = scene.pick({ canvasPos: canvasPos });//, includeEntities: pickIds });
const pickEntity = pickResult && pickResult.entity;
const pickId = pickEntity && pickEntity.id;
return (pickId in handlers) && handlers[pickId];
};
const startDrag = (event, matchesEvent) => {
const handler = pickHandler(matchesEvent(event));
if (handler) {
if (currentDrag) {
currentDrag.cleanup();
}
const dragAction = handler.initDragAction(canvasPos);
if (dragAction) {
cameraControl.pointerEnabled = false; // or .active = false ?
handler.setActivated(true);
currentDrag = {
onChange: event => {
const e = matchesEvent(event);
if (e) {
copyCanvasPos(e, canvasPos);
dragAction(canvasPos);
}
},
cleanup: function() {
currentDrag = null;
cameraControl.pointerEnabled = true; // or .active = true ?
handler.setActivated(false);
}
};
}
return !!dragAction;
} else {
return false;
}
};
const addCanvasEventListener = (type, listener) => {
canvas.addEventListener(type, listener);
cleanups.push(() => canvas.removeEventListener(type, listener));
};
const preventDefaultStopPropagation = e => {
e.preventDefault();
e.stopPropagation();
e.stopImmediatePropagation();
};
addCanvasEventListener("mousedown", (e) => {
if ((e.which === 1) && startDrag(e, event => (event.which === 1) && event)) {
preventDefaultStopPropagation(e);
}
});
addCanvasEventListener("mousemove", (e) => {
if (currentDrag) {
currentDrag.onChange(e);
preventDefaultStopPropagation(e);
} else {
if (deactivateActive) {
deactivateActive();
}
const handler = pickHandler(e);
if (handler) {
handler.setActivated(true);
deactivateActive = () => handler.setActivated(false);
} else {
deactivateActive = null;
}
}
});
addCanvasEventListener("mouseup", (e) => {
if (currentDrag) {
currentDrag.onChange(e);
currentDrag.cleanup();
// Calling preventDefaultStopPropagation would interfere with cameraControl
// by making it follow the pointer until next click
// preventDefaultStopPropagation(e);
}
});
addCanvasEventListener("touchstart", event => {
event.preventDefault();
if (event.touches.length === 1)
{
const touchStartId = event.touches[0].identifier;
if (startDrag(event, event => [...event.changedTouches].find(e => e.identifier === touchStartId))) {
preventDefaultStopPropagation(event);
}
}
});
addCanvasEventListener("touchmove", event => {
if (currentDrag) {
currentDrag.onChange(event);
preventDefaultStopPropagation(event);
}
});
addCanvasEventListener("touchend", event => {
if (currentDrag) {
currentDrag.onChange(event);
currentDrag.cleanup();
// See the comment in mouseup listener
// preventDefaultStopPropagation(e);
}
});
}
this.__destroy = () => {
cleanups.forEach(c => c());
rootNode.destroy();
for (let id in handlers) {
delete handlers[id];
}
};
}
destroy() {
this.__destroy();
}
/**
* Called to assign this Control to Handlers.
* Call with a null or undefined value to disconnect the Control from whatever Handlers it was assigned to.
* @private
*/
setHandlers(handlers) {
Object.values(this._displayMeshes).forEach(m => m.visible = !!handlers);
this._handlers = handlers;
this._displayMeshes.x.setPositionActive(handlers && handlers.onPosition);
this._displayMeshes.y.setPositionActive(handlers && handlers.onPosition);
this._displayMeshes.z.setPositionActive(handlers && handlers.onPosition);
this._displayMeshes.x.setRotationActive(handlers && handlers.onQuaternion);
this._displayMeshes.y.setRotationActive(handlers && handlers.onQuaternion);
this._displayMeshes.z.setRotationActive(handlers && handlers.onQuaternion);
}
/**
* Sets the World-space position of this Control.
*
* @param {Number[]} value New position.
*/
setPosition(p) {
this._setPosition(p);
}
/**
* Sets the quaternion of this Control.
*
* @param {Number[]} value New quaternion.
*/
setQuaternion(q) {
this._setQuaternion(q);
}
}
export {TransformControl};