1. Log into Odin, using the -YC options.
   example: ssh myname@odin -YC

2. Change to your 3480/6 folder.

Copy the lab files now...
cp /home/fac/gordon/p/3480/code/6/* .

Compile and run the program:
make
./lab6

Press 5


We will do some coding together to turn the pyramid into
a smooth cone or cylinder.

Get ready to code!

//Vertical synchronization code

    case XK_v: {
        g.vsync = !g.vsync;
        //vertical synchronization
        //https://github.com/godotengine/godot/blob/master/platform/
        //x11/context_gl_x11.cpp
        static PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT = NULL;
        glXSwapIntervalEXT =
            (PFNGLXSWAPINTERVALEXTPROC)glXGetProcAddressARB(
            (const GLubyte *)"glXSwapIntervalEXT");
        GLXDrawable drawable = glXGetCurrentDrawable();
        if (g.vsync) {
            glXSwapIntervalEXT(x11.dpy, drawable, 1);
        } else {
            glXSwapIntervalEXT(x11.dpy, drawable, 0);
        }
        break;
    }

We will open and learn to use Blender.

We will build a model in blender, export it, then display it
where the cube is rotating.

Get ready for some blender.

Homework is...

1. Get your cylinder built correctly.

   Building a smooth-looking cylinder using 10 or less
   points-on-a-circle will get you extra points.

   You will have to give a normal to each vertex rather than each triangle.
   This is called Phong shading.
   It is described in our text books and many articles online.


2. Put a texture on the cube in menu item #6.

   Apply the texture to all 6 sides of the cube.
   Use a texture image that makes sense for a cube.

   I recommend using a texture image that you produced yourself using
   your phone camera and Gimp.


3. Put a texture on your cylinder.

   Apply a texture such as a soda can.
   You may find a texture map image online, but you may also
   make your own texture image.

Sample program with a texture...
-----------------------------------------------------------------
/home/fac/gordon/p/3480/code/frameworks/background/background.cpp
-----------------------------------------------------------------

Do not use any images that are copyrighted or have watermarks.
Making your own texture images is best.
Take a picture with your phone.


Here is my own textured cylinder made of bricks.
The texture is from the fireplace in my house.

I used just 20 points-on-a-circle.
The texture image dimensions are 1024 x 256 pixels.

Here is my texture image


Here are my cylinders on key-5 with textures from google.
Phong shading with top and bottom surfaces.


textures...
  




This is a Phong-shaded cylinder.
Just 12 points-on-a-circle.
No edges are visible on the cylinder's surface.

I will describe Phong shading in class,
then you will add it to your homework.