@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 "../../../math/math.js";
/**
* @private
*/
class MousePickHandler {
constructor(scene, controllers, configs, states, updates) {
this._scene = scene;
const pickController = controllers.pickController;
const pivotController = controllers.pivotController;
const cameraControl = controllers.cameraControl;
this._clicks = 0;
this._timeout = null;
this._lastPickedEntityId = null;
this._lastClickedWorldPos = null;
let leftDown = false;
let rightDown = false;
const canvas = this._scene.canvas.canvas;
const flyCameraTo = (pickResult) => {
let pos;
if (pickResult && pickResult.worldPos) {
pos = pickResult.worldPos
}
const aabb = pickResult && pickResult.entity ? pickResult.entity.aabb : scene.aabb;
if (pos) { // Fly to look at point, don't change eye->look dist
const camera = scene.camera;
const diff = math.subVec3(camera.eye, camera.look, []);
controllers.cameraFlight.flyTo({
// look: pos,
// eye: xeokit.math.addVec3(pos, diff, []),
// up: camera.up,
aabb: aabb
});
// TODO: Option to back off to fit AABB in view
} else {// Fly to fit target boundary in view
controllers.cameraFlight.flyTo({
aabb: aabb
});
}
};
const tickifiedMouseMoveFn = scene.tickify (
this._canvasMouseMoveHandler = (e) => {
if (!(configs.active && configs.pointerEnabled)) {
return;
}
if (leftDown || rightDown) {
return;
}
if (cameraControl.hasSubs("rayMove"))
{
const origin = math.vec3();
const direction = math.vec3();
math.canvasPosToWorldRay(scene.canvas.canvas, scene.camera.viewMatrix, scene.camera.projMatrix, scene.camera.projection, states.pointerCanvasPos, origin, direction);
cameraControl.fire("rayMove", { canvasPos: states.pointerCanvasPos, ray: { origin: origin, direction: direction, canvasPos: states.pointerCanvasPos } }, true);
}
const hoverSubs = cameraControl.hasSubs("hover");
const hoverEnterSubs = cameraControl.hasSubs("hoverEnter");
const hoverOutSubs = cameraControl.hasSubs("hoverOut");
const hoverOffSubs = cameraControl.hasSubs("hoverOff");
const hoverSurfaceSubs = cameraControl.hasSubs("hoverSurface");
const hoverSnapOrSurfaceSubs = cameraControl.hasSubs("hoverSnapOrSurface");
if (hoverSubs || hoverEnterSubs || hoverOutSubs || hoverOffSubs || hoverSurfaceSubs || hoverSnapOrSurfaceSubs) {
pickController.pickCursorPos = states.pointerCanvasPos;
pickController.schedulePickEntity = true;
pickController.schedulePickSurface = hoverSurfaceSubs;
pickController.scheduleSnapOrPick = hoverSnapOrSurfaceSubs
pickController.update();
if (pickController.pickResult) {
if (pickController.pickResult.entity) {
const pickedEntityId = pickController.pickResult.entity.id;
if (this._lastPickedEntityId !== pickedEntityId) {
if (this._lastPickedEntityId !== undefined) {
cameraControl.fire("hoverOut", { // Hovered off an entity
entity: scene.objects[this._lastPickedEntityId]
}, true);
}
cameraControl.fire("hoverEnter", pickController.pickResult, true); // Hovering over a new entity
this._lastPickedEntityId = pickedEntityId;
}
}
cameraControl.fire("hover", pickController.pickResult, true);
if (pickController.pickResult.worldPos || pickController.pickResult.snappedWorldPos) { // Hovering the surface of an entity
cameraControl.fire("hoverSurface", pickController.pickResult, true);
}
} else {
if (this._lastPickedEntityId !== undefined) {
cameraControl.fire("hoverOut", { // Hovered off an entity
entity: scene.objects[this._lastPickedEntityId]
}, true);
this._lastPickedEntityId = undefined;
}
cameraControl.fire("hoverOff", { // Not hovering on any entity
canvasPos: pickController.pickCursorPos
}, true);
}
}
}
);
canvas.addEventListener("mousemove", tickifiedMouseMoveFn);
canvas.addEventListener('mousedown', this._canvasMouseDownHandler = (e) => {
if (e.which === 1) {
leftDown = true;
}
if (e.which === 3) {
rightDown = true;
}
const leftButtonDown = (e.which === 1);
if (!leftButtonDown) {
return;
}
if (!(configs.active && configs.pointerEnabled)) {
return;
}
// Left mouse button down to start pivoting
states.mouseDownClientX = e.clientX;
states.mouseDownClientY = e.clientY;
states.mouseDownCursorX = states.pointerCanvasPos[0];
states.mouseDownCursorY = states.pointerCanvasPos[1];
if ((!configs.firstPerson) && configs.followPointer) {
pickController.pickCursorPos = states.pointerCanvasPos;
pickController.schedulePickSurface = true;
pickController.update();
if (e.which === 1) {// Left button
const pickResult = pickController.pickResult;
if (pickResult && pickResult.worldPos) {
pivotController.setPivotPos(pickResult.worldPos);
pivotController.startPivot();
this._lastClickedWorldPos = pickResult.worldPos.slice();
} else {
if (configs.smartPivot) {
pivotController.setCanvasPivotPos(states.pointerCanvasPos);
} else {
if (this._lastClickedWorldPos) {
pivotController.setPivotPos(this._lastClickedWorldPos);
} else {
pivotController.setPivotPos(scene.camera.look);
}
}
pivotController.startPivot();
}
}
}
});
document.addEventListener('mouseup', this._documentMouseUpHandler = (e) => {
if (e.which === 1) {
leftDown = false;
}
if (e.which === 3) {
rightDown = false;
}
if (pivotController.getPivoting()) {
pivotController.endPivot();
}
});
canvas.addEventListener('mouseup', this._canvasMouseUpHandler = (e) => {
if (!(configs.active && configs.pointerEnabled)) {
return;
}
const leftButtonUp = (e.which === 1);
if (!leftButtonUp) {
return;
}
// Left mouse button up to possibly pick or double-pick
pivotController.hidePivot();
if (Math.abs(e.clientX - states.mouseDownClientX) > 3 || Math.abs(e.clientY - states.mouseDownClientY) > 3) {
return;
}
const pickedSubs = cameraControl.hasSubs("picked");
const pickedNothingSubs = cameraControl.hasSubs("pickedNothing");
const pickedSurfaceSubs = cameraControl.hasSubs("pickedSurface");
const doublePickedSubs = cameraControl.hasSubs("doublePicked");
const doublePickedSurfaceSubs = cameraControl.hasSubs("doublePickedSurface");
const doublePickedNothingSubs = cameraControl.hasSubs("doublePickedNothing");
if ((!configs.doublePickFlyTo) &&
(!doublePickedSubs) &&
(!doublePickedSurfaceSubs) &&
(!doublePickedNothingSubs)) {
// Avoid the single/double click differentiation timeout
if (pickedSubs || pickedNothingSubs || pickedSurfaceSubs) {
pickController.pickCursorPos = states.pointerCanvasPos;
pickController.schedulePickEntity = true;
pickController.schedulePickSurface = pickedSurfaceSubs;
pickController.update();
if (pickController.pickResult) {
cameraControl.fire("picked", pickController.pickResult, true);
if (pickController.pickedSurface) {
cameraControl.fire("pickedSurface", pickController.pickResult, true);
}
} else {
cameraControl.fire("pickedNothing", {
canvasPos: states.pointerCanvasPos
}, true);
}
}
this._clicks = 0;
return;
}
this._clicks++;
if (this._clicks === 1) { // First click
pickController.pickCursorPos = states.pointerCanvasPos;
pickController.schedulePickEntity = configs.doublePickFlyTo;
pickController.schedulePickSurface = pickedSurfaceSubs;
pickController.update();
const firstClickPickResult = pickController.pickResult;
const firstClickPickSurface = pickController.pickedSurface;
this._timeout = setTimeout(() => {
if (firstClickPickResult) {
cameraControl.fire("picked", firstClickPickResult, true);
if (firstClickPickSurface) {
cameraControl.fire("pickedSurface", firstClickPickResult, true);
if ((!configs.firstPerson) && configs.followPointer) {
controllers.pivotController.setPivotPos(firstClickPickResult.worldPos);
if (controllers.pivotController.startPivot()) {
controllers.pivotController.showPivot();
}
}
}
} else {
cameraControl.fire("pickedNothing", {
canvasPos: states.pointerCanvasPos
}, true);
}
this._clicks = 0;
}, configs.doubleClickTimeFrame);
} else { // Second click
if (this._timeout !== null) {
window.clearTimeout(this._timeout);
this._timeout = null;
}
pickController.pickCursorPos = states.pointerCanvasPos;
pickController.schedulePickEntity = configs.doublePickFlyTo || doublePickedSubs || doublePickedSurfaceSubs;
pickController.schedulePickSurface = pickController.schedulePickEntity && doublePickedSurfaceSubs;
pickController.update();
if (pickController.pickResult) {
cameraControl.fire("doublePicked", pickController.pickResult, true);
if (pickController.pickedSurface) {
cameraControl.fire("doublePickedSurface", pickController.pickResult, true);
}
if (configs.doublePickFlyTo) {
flyCameraTo(pickController.pickResult);
if ((!configs.firstPerson) && configs.followPointer) {
const pickedEntityAABB = pickController.pickResult.entity.aabb;
const pickedEntityCenterPos = math.getAABB3Center(pickedEntityAABB);
controllers.pivotController.setPivotPos(pickedEntityCenterPos);
if (controllers.pivotController.startPivot()) {
controllers.pivotController.showPivot();
}
}
}
} else {
cameraControl.fire("doublePickedNothing", {
canvasPos: states.pointerCanvasPos
}, true);
if (configs.doublePickFlyTo) {
flyCameraTo();
if ((!configs.firstPerson) && configs.followPointer) {
const sceneAABB = scene.aabb;
const sceneCenterPos = math.getAABB3Center(sceneAABB);
controllers.pivotController.setPivotPos(sceneCenterPos);
if (controllers.pivotController.startPivot()) {
controllers.pivotController.showPivot();
}
}
}
}
this._clicks = 0;
}
}, false);
}
reset() {
this._clicks = 0;
this._lastPickedEntityId = null;
if (this._timeout) {
window.clearTimeout(this._timeout);
this._timeout = null;
}
}
destroy() {
const canvas = this._scene.canvas.canvas;
canvas.removeEventListener("mousemove", this._canvasMouseMoveHandler);
canvas.removeEventListener("mousedown", this._canvasMouseDownHandler);
document.removeEventListener("mouseup", this._documentMouseUpHandler);
canvas.removeEventListener("mouseup", this._canvasMouseUpHandler);
if (this._timeout) {
window.clearTimeout(this._timeout);
this._timeout = null;
}
}
}
export {MousePickHandler};