This filter is found in
Filters->Light Effectsender->Gflare
Gflare effect reminds the effect you get when you take a photograph of
a blinding light source, with a halo and radiations around the source.
The Gflare image has three components: Glow which
is the big central fireball, Rays and
Second Flares
9.3.2.
Options
The Settings tab allows you to set manually the parameters while the
Selector tab let you choose presets in a list.
Preview
When Auto Update Preview is checked,
parameter setting results are interactively displayed in preview
without modifying the image until you click on
OK button.
9.3.3.
Settings
Center
Center: You can set there X and Y (pixels)
coordinates of glint. The coordinate origin is at upper left
corner
Parameters
Radius: The radius of the effect. Don't
be afraid to use the box with the digits instead the slider
which is a bit limited.
Rotation: Turn the effect.
Hue Rotation: Change the tint (color) of
the effect.
Vector Angle: Turn the Second flares.
Vector length: Vary the distance applied
for the Second flares.
Adaptive Supersampling
Adaptive Supersampling: Settings of the
anti-aliasing following parameters like Depth and Threshold.
9.3.4.
Selector
The Selector tab allows you to select a Gflare pattern, to change it
and save it.
New
When you click on this button, you create a new Gflare pattern.
Give it a name of your choice.
Edit
This button brings up the Gflare Editor (see below).
Copy
This button allows you to duplicate selected Gflare pattern.
You can edit the copy without altering the original.
Delete
This button deletes the selected Gflare pattern.
9.3.5.
Gflare Editor
Figure 11.111.
GFlare Editor
General
Glow Paint Options
Opacity: Slider and input box
allows you to reduce glow opacity (0-100).
Paint Mode: You can choose between
four modes:
Normal: In this mode, the glow
covers the image without taking into account what is
beneath.
Addition: Pixel RGB values of
glow are added to RGB values of the corresponding
pixels in the image. Colors get lighter and white
areas may appear.
Overlay: Light/Dark areas of
glow enhance corresponding light/dark areas of
image.
Screen: Dark areas of image are
enlightened by corresponding light areas of glow.
Imagine two slides projected onto the same screen.
Rays Paint Options
Options are the same as for "Glow".
Second Flare Paint Options
Options are the same as for "Glow".
Glow
Gradients
By clicking on the rectangular buttons, you can develop a
long list of gradients. "%" gradients belong to the Editor.
Radial gradient: The selected
gradient is drawn radially, from center to edge.
Angular gradient: The selected
gradient develops around center, counter-clockwise,
starting from three o'clock if "Rotation" parameter is
set to 0. Radial and angular gradients are combined
according to the Multiply mode: light areas are enhanced
and colors are mixed according to CMYK color system
(that of your printer).
Angular size gradient: This is a
gradient of radius size which develops angularly. Radius
is controlled according to gradient Luminosity: if
luminosity is zero (black), the radius is 0%. If
luminosity is 100% (white), the radius is also 100%.
Parameters
Size (%): Sets size (%) of glow
(0-200).
Rotation: Sets the origin of the
angular gradient (-180 +180).
Hue rotation: Sets glow color,
according to the HSV color circle (-180 +180).
Rays
Gradients
The options are the same as for Glow.
Parameters
The first three options are the same as in Glow. Two are
new:
# of spikes: This option determines
the number of spikes (1-300) but also their texture.
Spike Thickness: When spikes get
wider (1-100), they look like flower petals
Second Flares
Gradients
The options are the same as for Glow.
Parameters
Options are the same as in Glow.
Shape of Second Flares
Second flares, these satellites of the main flare, may have
two shapes: Circle and
Polygon. You can set the
Number polygon sides. The option
accepts 1 side (!), not 2.
Random seed and Randomize
Random Seed: The random generator
will use this value as a seed to generate random
numbers. You can use the same value to repeat the same
"random" sequence several times.
Randomize: When you click on this
button, you produce a random seed that will be used by
the random generator. It is each time different.
Published under the terms of the GNU General Public License
