Difference between revisions of "Reference:User Defined Pattern"
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| − | <p>{{New}} in version 3. | + | <p>{{New}} in version 3.8 a special pigment pattern <code>user_defined</code> has been added to define the pigment color directly in terms of a set of functions.</p> |
| + | |||
| + | <p>The syntax is a follows:</p> | ||
| + | |||
| + | <pre> | ||
| + | pigment { | ||
| + | user_defined { | ||
| + | function { RED_FUNCTION }, | ||
| + | function { GREEN_FUNCTION }, | ||
| + | function { BLUE_FUNCTION }, | ||
| + | function { FILTER_FUNCTION }, | ||
| + | function { TRANSMIT_FUNCTION } | ||
| + | } | ||
| + | } | ||
| + | </pre> | ||
| + | |||
| + | <p>Each function is <em>optional</em>, in which case the corresponding component is set to 0. For example, the following sets the color to <code>rgbft <x,y,0,0,z></code>:</p> | ||
| + | |||
| + | <pre> | ||
| + | pigment { | ||
| + | user_defined { | ||
| + | function { x }, | ||
| + | function { y }, | ||
| + | ,, | ||
| + | function { z } | ||
| + | } | ||
| + | } | ||
| + | </pre> | ||
| + | |||
| + | <p>The pattern is similar to <code>[[Reference:Image Map|image_map]]</code> in that it directly specifies <em>colors</em> rather than using a <code>[[Reference:Color Map|color_map]]</code> or <code>[[Reference:Pigment Map|pigment_map]]</code>.</p> | ||
| + | <p>The user defined pattern functionality also extends to density blocks, of course using only the red, green and blue function values. See also: [[Reference:Density|Density]]</p> | ||
Latest revision as of 10:55, 28 February 2018
New in version 3.8 a special pigment pattern user_defined has been added to define the pigment color directly in terms of a set of functions.
The syntax is a follows:
pigment {
user_defined {
function { RED_FUNCTION },
function { GREEN_FUNCTION },
function { BLUE_FUNCTION },
function { FILTER_FUNCTION },
function { TRANSMIT_FUNCTION }
}
}
Each function is optional, in which case the corresponding component is set to 0. For example, the following sets the color to rgbft <x,y,0,0,z>:
pigment {
user_defined {
function { x },
function { y },
,,
function { z }
}
}
The pattern is similar to image_map in that it directly specifies colors rather than using a color_map or pigment_map.
The user defined pattern functionality also extends to density blocks, of course using only the red, green and blue function values. See also: Density