Billboard

This section describes billboarding.

Billboarding is the process of controlling the orientation of polygons according to the orientation of the viewpoint.

Billboard Types

Table 1. Types of Billboards

Billboard Types Description
World (Standard) Rotates to display with the z-axis parallel with the camera lens axis.
In World billboarding, the scale and rotation of the parent node influences the process and the z-axis is always parallel with the camera lens axis.
World Viewpoint (Standard Persp) Rotates to display with the z-axis facing the camera.
In World Viewpoint billboarding, the scale and rotation of the parent node influences the process and the z-axis always faces the camera. World billboarding and World Viewpoint billboarding
Screen (Rotate) Rotates to display with the z-axis parallel with the camera lens axis.
In Screen billboarding, the y-axis is tethered to the camera's up direction and the x-axis is always parallel with the camera lens axis.
Influenced by scale of the parent node.
Screen Viewpoint (Rotate Persp) Rotates to display with the z-axis facing the camera.
In Screen Viewpoint billboarding, the y-axis is tethered to the camera's up direction and the x-axis always faces the camera.
Influenced by scale of the parent node.
World billboarding and World Viewpoint billboarding
Y Axial (Y-axis Rotate) Rotates only around the y-axis to display with the z-axis parallel with the camera lens axis.
In Y Axial billboarding, only the y-axis rotates and the z-axis is always parallel with the camera lens axis.
Influenced by scale and rotate of the parent node.
Y Axial Viewpoint (Y-axis Rotate Persp) Rotates only around the y-axis to display with the z-axis facing the camera.
In Y Axial Viewpoint billboarding, only the y-axis rotates and the z-axis always faces the camera.
Influenced by scale and rotate of the parent node.
World billboarding and World Viewpoint billboarding
 

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