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Rayfront 1.0 User Manual

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Function Pattern Types

The functional pattern types influence the reflectance of a material according to a defined function. There is a colored and an achromatic version.

Colorfunc

A colorfunc is a procedurally defined color pattern. The values of the red, green, and blue modifier expressions are multiplied with the material color values.

[dialog]

Function File:
This pop-up list offers all function files known to the system for selection. If a file is active, then the variables in that file can be selected for one or several of the vector coordinates. Otherwise, the coordinates must be entered as expressions.
Edit...
Start the text editor that was configured in the project preferences to edit the function file.
New...
Create a new function file, and start the text editor to edit it.

Modification Red/Green/Blue:
The values that modify the color of the base material. Those can either be selected from the variables in a function file as selected above, or they may be entered as expressions. An expression can contain numeric values, operators and all functions and variables known to the material. If an expression is not valid, then the entry field will have a red background, and the message bar at the bottom of the dialog will show a diagnostic message.

Real Arguments
Rayfront will check the selected function file to decide how many real arguments the material definition should supply. If this number is greater than the mandatory arguments specifying the basic properties, then the expected number of entry fields in the list is made available. Supplying those arguments is optional, but failing to do so may result in runtime errors when the selected function relies on a specific argument which is not set.

The Transformation page of the dialog can be used to transform the vector, possibly to bring it in alignment with the geometry of the surface the pattern modifies.

Brightfunc

A brightfunc is a procedurally defined monochromatic reflectance pattern. The value of the modifier expression is multiplied with each of the material color values.

[dialog]

Function File:
This pop-up list offers all function files known to the system for selection. If a file is active, then the variables in that file can be selected for one or several of the vector coordinates. Otherwise, the coordinates must be entered as expressions.
Edit...
Start the text editor that was configured in the project preferences to edit the function file.
New...
Create a new function file, and start the text editor to edit it.

Reflectance Modifier
The value that modifies the reflectance of the base material. This can either be selected from the variables in a function file as selected above, or it may be entered as an expression. An expression can contain numeric values, operators and all functions and variables known to the material. If an expression is not valid, then the entry field will have a red background, and the message bar at the bottom of the dialog will show a diagnostic message.

Real Arguments
Rayfront will check the selected function file to decide how many real arguments the material definition should supply. If this number is greater than the mandatory arguments specifying the basic properties, then the expected number of entry fields in the list is made available. Supplying those arguments is optional, but failing to do so may result in runtime errors when the selected function relies on a specific argument which is not set.

The Transformation page of the dialog can be used to transform the vector, possibly to bring it in alignment with the geometry of the surface the pattern modifies.

Navigation:

Up: User Manual Overview
     The Simulation Control Center
         Project Variation Settings
             Modifier Types
                 Pattern Types

Next:
Colordata, Brightdata
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