This example creates a street with lamp posts.
The illumination on a street is calculated by the method "Gather Sensor Light". The number of street lamps, their position and the width of the street sensor can be varied. The lamps are simulated by using point light sources with a LID file.
Light calculation calculates the light intensity distribution for one point light source with the method "Reverse Sensor Light", where the street sensor is loaded up by hand. The created lid file may be used in the street simulation. Remember, the method "Gather Sensor Light" loads sensors directly from light sources, whereas the method "Reverse Sensor Light" calculate light source distribution reversely from sensors.
Different viewing position can easily be displayed by simply pressing the appropriate buttons, i.e. "Driver View", "20m View", Pedestrian View", and "Bird's Eye View". With the "Set Viewing" button, you can set any favored viewing position. You may also change between different languages (German, English and Chinese).
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This example demonstrates the use of the "Gather Sensor Light" method in a test room for indoor lighting. You can apply this method if the distance between the light sources and the sensors is relatively large. By applying this method, the light in each sensor is directly gathered from each light source. Effects like reflection by other objects are not taken into account, only shielding is considered. A test room with 3 walls and a floor is illuminated by several point light sources with a LIDEmitter. The LID-Emitter uses a precalculated or a measured luminous intensity distribution stored in a LID file. The point light sources emit the light according to this LID. One can also read a new LID file via the file selection control.
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With this application, one can create and test ray files for existing lamp models. We have a set of predifined lamps in the lamp model library. Each lamp model consists of a set of emitting and absorbing shapes. With this models, one can now create ray files from this model. The ray file may then be used in future simulations. |
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This application estimates the required beam pattern of aircraft lights. It also demonstrates the use of the "Reverse Sensor Light" method, i.e. the calculation of a luminous intensity distribution with a virtual point light source. With a previously simulated scene with light in all sensors or with a scene set up "by hand", one can calculate a reverse sensor light. This is an intensity distribution which would be needed to illuminate a scene resulting in identical light distributions in all sensors. It is the reverse process to "Gather Sensor Light".
In our scenario the aircraft wing, the engine and the logo on the fin are required to be illuminated with a constant value of 10 lx. We estimate the required beam pattern of 2 headlamps which illuminate these aircraft areas. The first one (engine and wing scan light) is placed on the hull near the wing the the second (Logo Light)is placed near the rear fin.