Scene settings (3Dscene)

Description

3Dscene it the module that allows the user to set the scene by adding some options such as the base or the background color.

An example of a scene setting that could be obtained is shown in the following screen shot:

Tree

The module is configurable with the options in the tree.

The following options are available:

• Base
  Allow to show or hide the base. When this option is selected a toolbox is shown at the bottom of the tree. This toolbox is explained latter.
   
  • Color
    Change the base color.
     
  • Square
    The base is divided into little squares drawn with alternated colors.
     
  • Lighted
    Allow to illuminate or not the base. When the base is illuminated, it reflects the lights as any object in the scene. Otherwise, the base has a constant color.
     
  • Bitmaps
    Allow replacing the uniform base color by a preloaded bitmap. Other bitmaps can be loaded via the menu.
• Light
  These options allow setting the main light parameters. When one of these options is selected, a toolbox is displayed at the bottom of the tree, as explained latter.
   
  • Fixed
    The light is fixed in the scene if this option is checked. Otherwise the light is attached to the camera.
     
  • Ambient
    Light ambient color. This color is generally gray.
     
  • Diffuse
    Light diffuse color.
     
  • Specular
    Light specular color.
     
• Background
  These options allow setting the scene background.
   
  • Color
    Background uniform color of the scene.
     
  • 3D environment
    This list of options allows replacing the static uniform background color by a dynamic cubmap that is able to rotate with the scene. Other cubmaps could be loaded via the option menu.

Toolbox

Some tree options are associated with the following toolbox:

• Base
  • Altitude
    Allow to change the base altitude. Altitude zero is on the bottom most position in the scene.
     
  • Size
    Size modification in percentage of the scene sphere diameter.
     
  • Tile
    Change the number of squares in a squared base.
     
  • Opacity
    Change the base opacity from 0 (transparent) to 100 (opaque).
  
   
• Light
  • Shininess
    Change the size of the specular.
  
   
• Background
  • 3D environment
    • Rotate
      Allow to rotate the cubmap around the scene in order to let the choice of the visible cubmap portion from a given point of view.

Menu

Two menu entries are added in the Option menu:

• Load a base
  Allow to load a base bitmap of any supported image formats.
   
• Load a 3D environment
  Allow to load any cubmap. Six images must be in the loaded for the six cubic faces; the names are name-front.extension, name-back.extension, nane-top.extension, name-bottom.extension, nane-right.extension and name-left.extension. Only one of them is needed to be loaded.

Interaction

The base is an interactive 3D object. Its altitude and its size can be changed by clicking its body with the ALT keyboard key pressed or by double clicking and dragging the base.

A double-clic without dragging on the base restores its default size (120% of the scene size) and its default position (immediately under the scene's bottom most object).