OGC 3D Tiles

This sample shows how to load 3D tiles with meshes and point cloud data on the map. It also shows you how to style meshes and point clouds with expressions, allow measurements on meshes and point clouds, add effects to your map, and drape shapes on top of meshes. The map supports both 3D and 2D projections.

Usage

• Click Marseille Railway Station dataset to load the point cloud data on the map.
• Use 3D ruler controller to measure distances, angles and surface of area.
• Hover over the Railway Station layer in the layer tree, and click on the three dots to access the layer settings.
• Use styling expressions for the Point Cloud layer to modify the size, color, and visibility of individual points.
• Use Quality slider for each layer individually to apply the level of detail multiplication factor for the geometric error that determines the how detailed tiles should be loaded.
• Use Effects and Light to play with different graphical effects on the map.
• Select the walking route (orange line) or some points of interest (icons) along the walking route to show a balloon with more information about the clicked item.

Features

Use OGC3DTilesModel with a TileSet3DLayer .
You can load 3D tileset data on 2D and 3D WebGLMap maps.
Note: The elevation data has no effect in a 2D map.

The 3D ruler controller displays various measurements: distance of 3D line segments, angles between points, orthogonal distances, heights over terrain, and area surface, depending on the selected measurement mode. To start a measurement tool, turn on the 3D ruler controller and click on the map in order to add new points for measurement. Each additional click adds a new segment to measure. You can change the measurement mode on the measurement panel.

The 3D ruler uses Map.getViewToMapTransformation API with LocationMode.CLOSEST_SURFACE mode. This transformation object provides for the given view position a map point on the closest surface, that is a 3D object represented by meshes, point cloud points, extrudes shapes, or terrain.
This transformation is used on 3D maps only.

The Effects and Lights tools show various graphic effects that can be applied on a 3D scene. In the effects panel you can change the camera focus depth, you can enhance depth perception by enabling eye-dome-lighting, and you can play with the color palette of the scenery. In the light panel you can enable sunlight with shadows and atmosphere lighting, ambient occlusion and fog effects.

The TileSet3DLayer allows to set PointCloudStyle that defines the expression based styles for the point cloud data.
The are three types of expressions:

• colorExpression property defines colors for point cloud point. By default colors are defined in the tile data. If no color is defined, LuciadRIA paints them in white. You should use ExpressionFactory to define an expression that evaluates to a color value, e.g. based on attributes in the batch table section of the PNTS data.
• visibilityExpression property is a filter that determines point cloud data visibility. You should use ExpressionFactory to define an expression that evaluates to a boolean value.
• scaleExpression property controls point size. By default points are visualized as rectangles of size 3 on 3 pixels. You should use ExpressionFactory to define an expression that evaluates to a number value, that is interpreted as scale factor. The scale factor of value 1 preserves the original size, a value greater than 1 enlarges points, and a value lesser than 1 makes points smaller.

The TileSet3DLayer that contains the 3D tiles with meshes is marked as a drape target using the isDrapeTarget constructor parameter. This means that data can now be draped on this layer. To drape the walking tour shape, it is styled with a ShapeStyle in which the drapeTarget parameter is set to DrapeTarget.MESH.

Data

The Marseille 3D mesh data used in this sample was created by Airbus with Airbus Street Factory. The train station lidar data was created by Flying-Cam for Altametris and SNCF Réseau. Both datasets are available as OGC 3D Tiles services, hosted by our LuciadFusion server on https://sampleservices.luciad.com/ . You can use these services only for simple tests and demonstrations. You should not rely on either of them in any way.