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--- notes:cprog:fall2023:projects:gtf0 [2023/08/29 15:17] – [VIEW THE IMAGE] cmazzara
+++ notes:cprog:fall2023:projects:gtf0 [2023/09/07 01:47] (current) – [DRAWING A LINE] xcroft
@@ Line 3: / Line 3: @@
 =====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====
-====DRAWING A LINE====
+https://www.quackit.com/css/color/charts/web_safe_color_chart.cfm
-====DRAWING A RECTANGLE====
+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.

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