Materials library dialog

Materials library dialog contains information about Radiance material libraries and their contents. In this dialog user can open, explore and save libraries, and also edit and explore separate materials.
It can be opened from toolbar or menu Extensions-> De Luminae-> Global parameters-> Material libraries . It is also available in toolbars of next extensions DA, DF and Watt,

Left part of dialog contains material libraries tree. Tree initially contains only entries for few libraries distributed with DL-Light extension, but new user-defined libraries can be added.
Entries in tree can have various origin:

• Libraries provided with extension contain already validated Radiance materials definitions, and can't be modified by user (they are read-only).
• Libraries provided by user are added to tree when user click 'Import' button. Libraries are in fact textual files with Radiance materials definitions.
• 'Model materials' library contains all materials attached to layers in current model. It is dynamically updated, and represents current state of materials attached to model.
• 'User defined materials' are materials created in this dialog, and not belonging to any existing library. They are added when user click 'Create material' button. These materials are saved in temporary file, and remain available next time user opens dialog.

Libraries from the tree can be moved up/down to change their order of appearance. Materials from the tree can be moved (classic Drag-n-Drop) or copied (Drag-nDrop + Ctrl key) to other libraries. Materials from read-only libraries can only be copied to other libraries.

Right part of the dialog contains information about selected entry in the tree. It can be either library or material info.

Materials info panel

Top part of panel contains material name, library name and image.
Material definition can be done on two levels: Basic and Advanced.

Basic material definition contains info about material reflectance, transmittance. Two checkboxes enable to specify transmittance in more details, and say whether it is specular - glazing box, or diffuse - translucent box. Material created with 'Basic' features are always grey.

Advanced material definition enables input of material definition in Radiance syntax, and any valid Radiance material can be defined.
This version of extension doesn't support complex Radiance materials with patterns and textures.
If material is updated, its images is automatically created and shown few seconds later.

Control buttons

At the bottom of right part of dialog control buttons are shown and their functionalities depend on library and materials type.
Library related buttons:

• Create library - create new empty file for materials and add new library entry in the tree.
• Create material - create new material in the current library. New material is by default black, and user should update its info in appropriate controls. This option is not available for read-only libraries.
• Duplicate - create duplicate of the library in a new file. If read-only libraries are duplicated new libraries can be edited.
• Import - import new materials' library into the tree.
• Export - export current library materials to external textual file in Radiance format.
• Reload default - reload default libraries provided with the extension.
• Unload library- removes selected library from the tree.

When material is selected in the tree, some of next buttons are visible in the right part of the window:

• Create material - create new material in the current library. New material is by default black, and user should update its info in appropriate controls. This option is not available for read-only libraries.
• Duplicate - duplicate current material in the same library.
• Delete material - remove current material from the library.