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RGB_profiles_of_the_color_palette.gif (640 × 480 pixels, file size: 17 KB, MIME type: image/gif)
 | This is a file from the
Wikimedia Commons. Information from its
description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description | Standard color gradient made in Gnuplot : black-blue-red-yellow |
| Source | self-made using Gnuplot |
| Author | Adam majewski |
| Other versions |
|
.png)
Gnuplot source code
set terminal gif set output 'p.gif' test palette
It means:
set palette rgbformulae 7,5,15
so
R=sqrt(x)
G=x^3
B=sin(360x)
C code
/* this is part of code which shows how to get above gradient */
unsigned char color3]; /* array */
double psin(double position)
{/* gives only positive values of sin because 0<=position<=1 */
if (position<0.5) return sin(position*2*3.14);
else return 0;
}
/* */
for(iY=0;iY<iYmax;++iY)
{
position=(double)iY/iYmax;
/* compute pixel color (24 bit = 3 bajts) */
color0=(int)255*sqrt(position);/*color.R */
color1=(int)255*position*position*position;/*color.G*/
color2=(int)255*psin(position); /*color.B/
}
See also other images of color gradients
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
This file is licensed under the
Creative Commons Attribution-Share Alike
4.0 International,
3.0 Unported,
2.5 Generic,
2.0 Generic and
1.0 Generic license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may select the license of your choice.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:43, 9 March 2008 |
| 640 × 480 (17 KB) | Soul windsurfer | {{Information |Description=Standard color gradient made in Gnuplot |Source=self-made |Date= |Author= Adam majewski |Permission= |other_versions= }} |
File usage
No pages on the English Wikipedia use this file (pages on other projects are not listed).
Global file usage
The following other wikis use this file:
- Usage on en.wikibooks.org
- Usage on pl.wikibooks.org
No higher resolution available.
RGB_profiles_of_the_color_palette.gif (640 × 480 pixels, file size: 17 KB, MIME type: image/gif)
| This is a file from the
Wikimedia Commons. Information from its
description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description | Standard color gradient made in Gnuplot : black-blue-red-yellow |
| Source | self-made using Gnuplot |
| Author | Adam majewski |
| Other versions |
|
Gnuplot source code
set terminal gif set output 'p.gif' test palette
It means:
set palette rgbformulae 7,5,15
so
R=sqrt(x)
G=x^3
B=sin(360x)
C code
/* this is part of code which shows how to get above gradient */
unsigned char color3]; /* array */
double psin(double position)
{/* gives only positive values of sin because 0<=position<=1 */
if (position<0.5) return sin(position*2*3.14);
else return 0;
}
/* */
for(iY=0;iY<iYmax;++iY)
{
position=(double)iY/iYmax;
/* compute pixel color (24 bit = 3 bajts) */
color0=(int)255*sqrt(position);/*color.R */
color1=(int)255*position*position*position;/*color.G*/
color2=(int)255*psin(position); /*color.B/
}
See also other images of color gradients
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
|
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
This file is licensed under the
Creative Commons Attribution-Share Alike
4.0 International,
3.0 Unported,
2.5 Generic,
2.0 Generic and
1.0 Generic license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may select the license of your choice.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:43, 9 March 2008 |
| 640 × 480 (17 KB) | Soul windsurfer | {{Information |Description=Standard color gradient made in Gnuplot |Source=self-made |Date= |Author= Adam majewski |Permission= |other_versions= }} |
File usage
No pages on the English Wikipedia use this file (pages on other projects are not listed).
Global file usage
The following other wikis use this file:
- Usage on en.wikibooks.org
- Usage on pl.wikibooks.org