======GTF0======

=====GRABIT=====
You can do grabit DESIG PROJECT do grab the project.
grabit cprog gtf0 is the command. Make sure to add it to your repository. 
=====REPOSITORY STEPS=====
Once gtf0 has been grabbed:
hg add gtf0
hg commit -m "MESSAGE HERE" to track what you have done
hg push to push it into your repository
=====BUILD THE CODE=====

To start building the code, you have to edit the gtf0.c file. A terminal text editor is recommended.

For nano, the command is
<blockquote> nano gtf0.c </blockquote>

You will click ^x (Ctrl + X) to Exit the file, where it will then ask to save it under the same name.
=====RUN THE PROGRAM=====

First, compile the program using the following command:

<blockquote>gcc -Wall --std=genu18 -o gtf0 gtf0.c -lgd</blockquote>

Once it's compiled, there is now an executable called gtf0. Do the following, <blockquote> ./gtf0 </blockquote> There will now be a gtf0.png file.

Alternatively, if you want to use the "make" command to compile, you need to install the gd library.
download the latest version, and extract the files using:
tar -xf (file name).tar.gz
Then cd into the file name, type ./configure to configure the archive
Then type "make"
The type "sudo make install" to finish installing the library.
This isn't needed but knowing how to install packages and libraries may be useful in the future
=====VIEW THE IMAGE=====
One way to view the image is to go to the folder through file explorer where you put the image and view it from there.

Another way to view the image is to place it in your public web space using **/bin/cp -f gtf0.png ~/public_html chmod 0644 ~/public_html/gtf0.png** , then viewing in a web browser: https://lab46.g7n.org/~username/gtf0.png
=====LIBGD FUNCTIONALITY=====

====MIXING A COLOR====

https://www.quackit.com/css/color/charts/web_safe_color_chart.cfm

Find a color you like. In this case, we'll be using #33FFCC and will be calling it cyan.

Declare cyan as a variable:

<blockquote> int             cyan             =0; </blockquote>

Then we can allocate the value for the variable.

<blockquote> cyan            =gdImageColorAllocate (image, 0x33, 0xFF, 0xCC);
</blockquote>


====DRAWING A LINE====                            
Command for a Line is gdImageLine (image, x, y, x^2, y^2, color);
====DRAWING A RECTANGLE====
Command is gdImageRectangle (image, x, y, x^2, y^2, color);
====FILLING AN ENCLOSED SPACE====
Do  gdImageFill (image, x, y, color);

====DRAWING A FILLED RECTANGLE====

The command to draw a filled in rectangle is as follows,

<blockquote> gdImageFilledRectangle (image, x, y, x2, y2, color); </blockquote>
====DRAWING A CIRCLE====
gdImageArc (image, center point X, center point Y, diameter X, diameter Y, Angle start, angle end, color);

Make sure the diameter X and Y are the same, as this makes a perfect circle
====DRAWING AN ELLIPSE====

gdImageArc (image, center point X, center point Y, diameter X, diameter Y, Angle start, angle end, color);

Make sure the diameter x and y are different integers, as this stretches the circle on the larger side making an ellipse.