Add intersection calculation mode.

source/engine/main.js

@@ -73,7 +73,7 @@ import { EmbeddedViewer, Init3DViewerFromUrlList, Init3DViewerFromFileList, Init
 import { MouseInteraction, TouchInteraction, ClickDetector, Navigation, NavigationType } from './viewer/navigation.js';
 import { EnvironmentSettings, ShadingModel } from './viewer/shadingmodel.js';
 import { CameraValidator, UpVector, Viewer, GetDefaultCamera, TraverseThreeObject, GetShadingTypeOfObject } from './viewer/viewer.js';
-import { ViewerModel, EdgeSettings, ViewerMainModel, SetThreeMeshPolygonOffset } from './viewer/viewermodel.js';
+import { ViewerModel, EdgeSettings, ViewerMainModel, SetThreeMeshPolygonOffset, IntersectionMode } from './viewer/viewermodel.js';
 
 export {
     IsDefined,
@@ -350,5 +350,6 @@ export {
     ViewerModel,
     EdgeSettings,
     ViewerMainModel,
-    SetThreeMeshPolygonOffset
+    SetThreeMeshPolygonOffset,
+    IntersectionMode
 };

source/engine/viewer/viewer.js

@@ -484,19 +484,19 @@ export class Viewer
         this.Render ();
     }
 
-    GetMeshUserDataUnderMouse (mouseCoords)
+    GetMeshUserDataUnderMouse (intersectionMode, mouseCoords)
     {
-        let intersection = this.GetMeshIntersectionUnderMouse (mouseCoords);
+        let intersection = this.GetMeshIntersectionUnderMouse (intersectionMode, mouseCoords);
         if (intersection === null) {
             return null;
         }
         return intersection.object.userData;
     }
 
-    GetMeshIntersectionUnderMouse (mouseCoords)
+    GetMeshIntersectionUnderMouse (intersectionMode, mouseCoords)
     {
         let canvasSize = this.GetCanvasSize ();
-        let intersection = this.mainModel.GetMeshIntersectionUnderMouse (mouseCoords, this.camera, canvasSize.width, canvasSize.height);
+        let intersection = this.mainModel.GetMeshIntersectionUnderMouse (intersectionMode, mouseCoords, this.camera, canvasSize.width, canvasSize.height);
         if (intersection === null) {
             return null;
         }

source/engine/viewer/viewermodel.js

@@ -3,6 +3,12 @@ import { ConvertColorToThreeColor, DisposeThreeObjects } from '../threejs/threeu
 
 import * as THREE from 'three';
 
+export const IntersectionMode =
+{
+	MeshOnly : 1,
+    MeshAndLine : 2
+};
+
 export function SetThreeMeshPolygonOffset (mesh, offset)
 {
     function SetMaterialsPolygonOffset (materials, offset)
@@ -303,7 +309,7 @@ export class ViewerMainModel
         }
     }
 
-    GetMeshIntersectionUnderMouse (mouseCoords, camera, width, height)
+    GetMeshIntersectionUnderMouse (intersectionMode, mouseCoords, camera, width, height)
     {
         function CalculateLineThreshold (mousePos, camera, boundingBoxCenter)
         {
@@ -343,7 +349,13 @@ export class ViewerMainModel
         let iSectObjects = raycaster.intersectObject (this.mainModel.GetRootObject (), true);
         for (let i = 0; i < iSectObjects.length; i++) {
             let iSectObject = iSectObjects[i];
-            if ((iSectObject.object.isMesh || iSectObject.object.isLineSegments) && iSectObject.object.visible) {
+            if (!iSectObject.object.visible) {
+                continue;
+            }
+            if (intersectionMode === IntersectionMode.MeshOnly && iSectObject.object.isLineSegments) {
+                continue;
+            }
+            if (iSectObject.object.isMesh || iSectObject.object.isLineSegments) {
                 return iSectObject;
             }
         }

source/website/measuretool.js

@@ -4,6 +4,7 @@ import { AddSvgIconElement, IsDarkTextNeededForColor } from './utils.js';
 
 import * as THREE from 'three';
 import { ColorComponentToFloat, RGBColor } from '../engine/model/color.js';
+import { IntersectionMode } from '../engine/viewer/viewermodel.js';
 
 function GetFaceWorldNormal (intersection)
 {
@@ -135,8 +136,8 @@ export class MeasureTool
 
     Click (mouseCoordinates)
     {
-        let intersection = this.viewer.GetMeshIntersectionUnderMouse (mouseCoordinates);
-        if (intersection === null || !intersection.object.isMesh) {
+        let intersection = this.viewer.GetMeshIntersectionUnderMouse (IntersectionMode.MeshOnly, mouseCoordinates);
+        if (intersection === null) {
             this.ClearMarkers ();
             this.UpdatePanel ();
             return;
@@ -152,8 +153,8 @@ export class MeasureTool
 
     MouseMove (mouseCoordinates)
     {
-        let intersection = this.viewer.GetMeshIntersectionUnderMouse (mouseCoordinates);
-        if (intersection === null || !intersection.object.isMesh) {
+        let intersection = this.viewer.GetMeshIntersectionUnderMouse (IntersectionMode.MeshOnly, mouseCoordinates);
+        if (intersection === null) {
             if (this.tempMarker !== null) {
                 this.tempMarker.Show (false);
                 this.viewer.Render ();

source/website/website.js

@@ -27,6 +27,7 @@ import { CloseAllDialogs } from './dialog.js';
 import { CreateVerticalSplitter } from './splitter.js';
 import { EnumeratePlugins, PluginType } from './pluginregistry.js';
 import { EnvironmentSettings } from '../engine/viewer/shadingmodel.js';
+import { IntersectionMode } from '../engine/viewer/viewermodel.js';
 
 const WebsiteUIState =
 {
@@ -316,7 +317,7 @@ export class Website
             return;
         }
 
-        let meshUserData = this.viewer.GetMeshUserDataUnderMouse (mouseCoordinates);
+        let meshUserData = this.viewer.GetMeshUserDataUnderMouse (IntersectionMode.MeshAndLine, mouseCoordinates);
         if (meshUserData === null) {
             this.navigator.SetSelection (null);
         } else {
@@ -333,7 +334,7 @@ export class Website
 
     OnModelContextMenu (globalMouseCoordinates, mouseCoordinates)
     {
-        let meshUserData = this.viewer.GetMeshUserDataUnderMouse (mouseCoordinates);
+        let meshUserData = this.viewer.GetMeshUserDataUnderMouse (IntersectionMode.MeshAndLine, mouseCoordinates);
         let items = [];
         if (meshUserData === null) {
             items.push ({