Object3D Billboard Sphere

3D sphere with constant screen-size (billboard behavior). The sphere automatically scales based on camera distance so it always appears the same size on screen, regardless of zoom or camera position.

Uses direct GPU drawing for maximum performance: all sphere instances are rendered by a single scene-graph node, making it suitable for large numbers of spheres (point clouds, particle-like visualizations, etc.).

Settings

visible

Determines if the object is visible or not.

viewport num

ID number of the target object3d-viewer where the object is displayed.

opacity

Opacity of the object or primitive.

color

Color of the primitives.

vertices points

3D points coordinates used to draw the primitives.

• 1 point for (3 coordinates) for points,
• 2 points (6 coordinates) for lines,
• 3 points (9 coordinates) for triangles.

coordinates

3D coordinates of the sphere centers. Provided as a flat array of XYZ triplets: every 3 values define one sphere position. The number of spheres is determined by the array length divided by 3.

screen size

Controls the apparent size of the spheres on screen. The sphere scales proportionally to its distance from the camera, so this value defines a relative angular size rather than a world-space dimension. Accepts a single value (applied to all instances) or an array of values (one per sphere).

subdivisions axes

Number of subdivisions used to generate the sphere mesh. Higher values produce a smoother sphere but require more processing. All instances share the same subdivision level.

See also

• Object 3D
• Object3D Mesh
• Object3D Primitive Lines
• Object3D Sphere
• Object3D Primitive Points
• Object3D Cone
• Object3D Stroke Cube
• Object3D Billboard Sphere
• Object3D Ellipse
• Object3D Cylinder
• Object3D Round Cube
• Object3D Plane
• Object3D Disk
• Object3D Path
• Object3D Model
• Object3D Text
• Object3D Primitive Quads
• Object3D Rectangle
• Object3D Primitive Triangle
• Object3D Cube