*Specifications. *Components. *Applications. *Pictures.

Components of IndalWin-Radiosity   The application is composed of three main parts: Description of the scene. Simulation of interaction between material and light. 3D visualisation of the simulation results.    Description of the scene. The description of the scene defines from text files the details of all of the different elements that will appear in the scene; in the same way as brightness is defined. The following elements are used: Plan: Quadrangular surface situated at coordinate z=0. Walls: Surfaces that define an enclosure, they must be introduced in time order.   Ceiling: Surface defined by the walls. Windows and skylights: "Open spaces" must be in the surfaces defined by the walls and the ceiling. Objects: Definable hexahedrons with different dimensions in whatever zone in space.  Hedges and trees: Bush like obstacles with special random features from their growth and foliage thickness data. Luminaries: Point source with directional and special distribution; They must be defined in the format TM14. Sun: Illumination model for the sun depending on the geographical situation, the time of year, and the time of day.  Areas of calculation: Allowing the calculation of isolux bends on a plane of work situated in whatever position and oriented within the scene. Simulation of interaction between material and light. Calculation of progressive radiation using the hemi cube algorithm for form factors.  Adaptation of the hemi cube method to work for point source and solar illumination. Materials considered perfect diffusers, and their coefficients of reflection obtained from RGB values between [0-1] that define their colour.  The colour of the luminaries is defined using using the international system of CIE specification using xy values. The intensity of the light sources are measured in Lumens.   Refinement of the Network. The surfaces are networked in polygons, quadrangles and triangles; the network that is generated is not shaped and structured. In order to reach the desired result with a predetermined precision, during calculation Indal-Radiosity re-networks the surfaces in which their vertices have sudden changes in luminosity.  3D visualisation of the simulation results Once realised the results obtained from the illumination algorithms are visualised  in a window; in which the user can interact and move across.  Representation options that exist: Wire mesh. Wire mesh over the top of surfaces.  Activation/deactivation of the interior faces. (back face culling). Smoothing of colour (Smooth polygon). Representation of data using: Gray scaling. False colouring. Real colouring: without gamma correction and with three levels of correction. Reproduction of tone using normalisation of illumination between [1-0] Visualisation of isolux curves in the areas of calculation.  Other related options with regard to the storing of results.  Saving calculations for subsequent recovery.  Saving the image in the viewed format BMP. Printing the actual view. ^^Top^^     About Indalwin: seron@posta.unizar.es; emilio@ivo.cps.unizar.es         <<Back<<