OpenSceneGraph 3.0

Time for action—rendering a flashing spotlight

The key to rendering dynamic textures is to provide multiple images as the source, and draw them one after another. These images can be obtained from a video file, or created by developers and artists. In the following example, we will create a series of spotlights with varying radii, and output them to osg::Image objects, and then attach them to the texture attribute using the osg::ImageSequence class to produce a flashing effect on a specific model.

1. Include the necessary headers:

   #include <osg/ImageSequence>
   #include <osg/Texture2D>
   #include <osg/Geometry>
   #include <osg/Geode>
   #include <osgViewer/Viewer>
   

2. The spotlight can be defined as a follow spot projecting a bright beam of light onto a space. ...