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2.10. IMAGEDRAWING
251
Example414:image.jpg -piechart
25,0,0,0,"Red",55,255,0,0,"Green",40,0,255,0,"Blue",30,128,128,255,"Other",5,128,128,128
2.10.21 -plasma (+)
Arguments:
alpha,
beta,
scale>=0
Draw a random colored plasma fractal on selected images.
This command implements the so-called ’Diamond-Square’ algorithm.
Default values:
• ’alpha=1’, ’beta=1’ and ’scale=8’.
Example 415 : 400,400,1,3 -plasma
Tutorial page:
http://gmic.eu/tutorial/_plasma.shtml
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252
CHAPTER 2. LIST OF COMMANDS
2.10.22 -point (+)
Arguments:
• x[%],y[%],
z[%],
opacity,
color1,..
Set specified colored pixel on selected images.
Default values:
• ’z=0’, ’opacity=1’ and ’color1=0’.
Example 416 : image.jpg -repeat 10000 -point {u(100)}%,{u(100)}%,0,1,${-RGB} -done
2.10.23 -polka
dots
Arguments:
• diameter>=0,
density,
offset1,
offset2,
angle,
aliasing,
shading,
opacity,
color,...
Draw dots pattern on selected images.
Default values:
• ’density=20’, ’offset1=offset2=50’, ’angle=0’, ’aliasing=10’, ’shading=1’,
’opacity=1’ and ’color=255’.
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2.10. IMAGE DRAWING
253
Example 417 : image.jpg -polka
dots 10,15,0,0,20,10,1,0.5,0,128,255
2.10.24 -polygon (+)
Arguments:
• N>=1,x1[%],y1[%],..,xN[%],yN[%],
opacity,
pattern,
color1,..
Draw specified colored N-vertices polygon on selected images.
’pattern’ is an hexadecimal number starting with ’0x’ which can be omitted even if a color is specified. If a
pattern is specified, the polygon is drawn outlined instead of filled.
Default values:
• ’opacity=1’, ’pattern=(undefined)’ and ’color1=0’.
Example 418 : image.jpg -polygon 4,20%,20%,80%,30%,80%,70%,20%,80%,0.3,0,255,0 -polygon
4,20%,20%,80%,30%,80%,70%,20%,80%,1,0xCCCCCCCC,255
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254
CHAPTER 2. LIST OF COMMANDS
Example 419 : image.jpg 2,16,1,1,’u(if(x,{h},{w}))’ -polygon..
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2.10.25 -quiver (+)
Arguments:
• [function
image],
sampling>0,
factor,
is
arrow={ 0
| 1
},
opacity,
pattern,
color1,..
Draw specified 2d vector/orientation field on selected images.
’pattern’ is an hexadecimal number starting with ’0x’ which can be omitted even if a color is specified.
Default values:
• ’sampling=25’, ’factor=-20’, ’is
arrow=1’, ’opacity=1’,
’pattern=(undefined)’
and ’color1=0’.
Example 420 : 100,100,1,2,’if(c==0,x-w/2,y-h/2)’ 500,500,1,3,255 -quiver.
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2.10. IMAGE DRAWING
255
Example 421 : image.jpg --resize2dy 600 -luminance[0] -gradient[0] -mul[1] -1 -reverse[0,1]
-append[0,1] c -blur[0] 8 -orientation[0] -quiver[1] [0],10,10,1,0.8,255
2.10.26 -rectangle
Arguments:
• x0[%],y0[%],x1[%],y1[%],
opacity,
pattern,
color1,..
Draw specified colored rectangle on selected images.
’pattern’ is an hexadecimal number starting with ’0x’ which can be omitted even if a color is specified. If a
pattern is specified, the rectangle is drawn outlined instead of filled.
Default values:
• ’opacity=1’, ’pattern=(undefined)’ and ’color1=0’.
Example 422 : image.jpg -repeat 30 -rectangle
{u(100)}%,{u(100)}%,{u(100)}%,{u(100)}%,0.3,${-RGB} -done
2.10.27 -rorschach
Arguments:
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256
CHAPTER 2. LIST OF COMMANDS
• ’smoothness[%]>=0’,’mirroring={ 0=none
| 1=x
| 2=y
| 3=xy }
Render rorschach-like inkblots on selected images.
Default values:
• ’smoothness=5%’ and ’mirroring=1’.
Example 423 : 400,400 -rorschach 3%
2.10.28 -sierpinski
Arguments:
• recursion
level>=0
Draw Sierpinski triangle on selected images.
Default value:
• ’recursion
level=7’.
Example 424 : image.jpg -sierpinski 7
2.10. IMAGE DRAWING
257
2.10.29 -snowflake
Arguments:
recursion>=0,
x0,
y0,
x1,
y1,
x2,
y2,
opacity,
col1,...
colN
Draw a Koch snowflake on selected images.
Default values:
• ’recursion=4’, ’x0=20’, ’y0=70’, ’x1=80’, ’y1=70’, ’x2=50’, ’y2=10’,
’opacity=1’ and ’col1=255’.
Example 425 : image.jpg -snowflake 4
2.10.30 -spiralbw
Draw (squared) spiral on selected images.
Example 426 : 16,16 -spiralbw
258
CHAPTER 2. LIST OF COMMANDS
2.10.31 -spline
Arguments:
• x0[%],y0[%],u0[%],v0[%],x1[%],y1[%],u1[%],v1[%],
nb
vertices>=2,
opacity,
color1,..
Draw specified colored spline curve on selected images (cubic hermite spline).
Default values:
• ’nb
vertices=256’, ’opacity=1’ and ’color1=0’.
Example 427 : image.jpg -repeat 30 -spline {u(100)}%,{u(100)}%,{u(-600,600)},{u(-600,600)},
{u(100)}%,{u(100)}%,{u(-600,600)},{u(-600,600)},256,0.3,255
-done
2.10.32 -tetraedron
shade
Arguments:
• x0,y0,z0,x1,y1,z1,x2,y2,z2,x3,y3,z3,R0,G0,B0,...,R1,G1,B1,...,R2,G2,B2,...,
R3,G3,B3,...
Draw tetraedron with interpolated colors on selected (volumetric) images.
2.10.33 -text (+)
Arguments:
• text,
x[%],
y[%],
font
height[%]>=0,
opacity,
color1,..
Draw specified colored text string on selected images.
(eq. to
’-t’
).
Exact pre-defined sizes are ’13’,’23’,’53’ and ’103’. Using these sizes ensures you draw binary letters without
anti-aliasing.
Any other font size is interpolated from an exact size (the upper when possible).
Specifying an empty target image resizes it to new dimensions such that the image contains the entire text
string.
2.10. IMAGE DRAWING
259
Default values:
• ’opacity=1’ and ’color1=0’.
Example 428 : image.jpg -resize2dy 600 y=0 -repeat 30 -text {2
*
$>}" :
This is a nice text,
isn’t it ?",10,$y,{2
*
$>},0.9,255 y+={2
*
$>} -done
Example 429 : 0 -text "G’MIC",0,0,23,1,255
2.10.34 -text
outline
Arguments:
• text,
x[%],
y[%],
font
height>0,
outline>=0,
opacity,
color1,..
Draw specified colored and outlined text string on selected images.
Default values:
• ’x=y=2’, ’font
height=13’, ’outline=2’, ’opacity=1’ and ’color1=255’.
260
CHAPTER 2. LIST OF COMMANDS
Example 430: image.jpg -text
outline "Hi there!",10,10,63,3
2.10.35 -triangle
shade
Arguments:
• x0,y0,x1,y1,x2,y2,R0,G0,B0,...,R1,G1,B1,...,R2,G2,B2,....
Draw triangle with interpolated colors on selected images.
Example 431 : image.jpg -triangle
shade 20,20,400,100,120,200,255,0,0,0,255,0,0,0,255
2.10.36 -truchet
Arguments:
scale>0,
radius>=0,
pattern
type={ 0=straight
| 1=curved }
Fill selected images with random truchet patterns.
Default values:
• ’scale=32’, ’radius=5’ and ’pattern
type=1’.
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