Renderer (RGL)

Description

RGL is the rendered engine based on OpenGL. It offers some global display options such as the real time shadows or the fog.

Tree

The module has some options available in the tree in the tab :

• Fastmove
  This option allow fast moves of the scene with the use of some strategy to increase the scene rendering speed. This options has a toolbox described latter.
   
Vertex arrays
Allow the use of the fast vertex arrays. Therefore, some early OpenGL implementation do not well support vertex arrays on wide models.
 
• Anti-aliasing
  Activate the antialiasing of the scene. This option gives better display result with a significant slow down.
   
• Compilation
  Scene compiling organizes the 3D model in a way that the rendering speed can be really significantly increased on some OpenGL cards.
   
• True transparency
  Without this option, some display bugs can be seen as it is shown in the following screen shots:

  False transparence	True transparence

• Shadow
  Allow the scene shadows to be displayed.
    Notice: the basis can be illuminated or not; in this case it only receive partially the shadow.
• Grayscale
  When checked, the scene is displayed in gray scales.
   
• Rendering time
  Display the average rendering speed.
   
• Fog
  Activate the fog.
   

toolbox

• Fast move
   
  • Mode
    Three display options are available:
    degradation degrades the scene display progressively,
    remove details allow suppressing the smallest scene details, and then
    simplification use a simplified version of the scene.
     
  • Classe
    is the number of classes used to classify the scene objects. The objects are classified by their size on the screen, not their absolute size.
     
  • Bypass
    Number of rendering to wait before classify again the scene.
     
  • Ideal rendering time
    Expected rendering time. The rendering engine will do its best to reach this ideal time using the fast move strategies.
     
• Antialiasing
   
  • Smooth: The angle value used to detect the surface breaks in the model.
  
   
• Fog
   
  • Mode
    The linear mode is defined with two planes parallel to the screen between witch the fog is built.
    The exponential mode builds the fog in an exponential way on the whole scene.
    The square exponential mode is identical to the precedent but the fog is denser.
     
  • Start
    Start plane of the fog in the linear mode.
     
  • End
    End plane of the fog in the linear mode.
     
  • Density
    Fog density in the both exponential modes.
     
  • Color
    Fog color.